Change endpoint from persons to people

backend/apis/nodejs/node_modules/nodemailer/lib/addressparser/index.js

@@ -0,0 +1,327 @@
+'use strict';
+
+/**
+ * Converts tokens for a single address into an address object
+ *
+ * @param {Array} tokens Tokens object
+ * @return {Object} Address object
+ */
+function _handleAddress(tokens) {
+    let isGroup = false;
+    let state = 'text';
+    let address;
+    let addresses = [];
+    let data = {
+        address: [],
+        comment: [],
+        group: [],
+        text: []
+    };
+    let i;
+    let len;
+
+    // Filter out <addresses>, (comments) and regular text
+    for (i = 0, len = tokens.length; i < len; i++) {
+        let token = tokens[i];
+        let prevToken = i ? tokens[i - 1] : null;
+        if (token.type === 'operator') {
+            switch (token.value) {
+                case '<':
+                    state = 'address';
+                    break;
+                case '(':
+                    state = 'comment';
+                    break;
+                case ':':
+                    state = 'group';
+                    isGroup = true;
+                    break;
+                default:
+                    state = 'text';
+                    break;
+            }
+        } else if (token.value) {
+            if (state === 'address') {
+                // handle use case where unquoted name includes a "<"
+                // Apple Mail truncates everything between an unexpected < and an address
+                // and so will we
+                token.value = token.value.replace(/^[^<]*<\s*/, '');
+            }
+
+            if (prevToken && prevToken.noBreak && data[state].length) {
+                // join values
+                data[state][data[state].length - 1] += token.value;
+            } else {
+                data[state].push(token.value);
+            }
+        }
+    }
+
+    // If there is no text but a comment, replace the two
+    if (!data.text.length && data.comment.length) {
+        data.text = data.comment;
+        data.comment = [];
+    }
+
+    if (isGroup) {
+        // http://tools.ietf.org/html/rfc2822#appendix-A.1.3
+        data.text = data.text.join(' ');
+        addresses.push({
+            name: data.text || (address && address.name),
+            group: data.group.length ? addressparser(data.group.join(',')) : []
+        });
+    } else {
+        // If no address was found, try to detect one from regular text
+        if (!data.address.length && data.text.length) {
+            for (i = data.text.length - 1; i >= 0; i--) {
+                if (data.text[i].match(/^[^@\s]+@[^@\s]+$/)) {
+                    data.address = data.text.splice(i, 1);
+                    break;
+                }
+            }
+
+            let _regexHandler = function (address) {
+                if (!data.address.length) {
+                    data.address = [address.trim()];
+                    return ' ';
+                } else {
+                    return address;
+                }
+            };
+
+            // still no address
+            if (!data.address.length) {
+                for (i = data.text.length - 1; i >= 0; i--) {
+                    // fixed the regex to parse email address correctly when email address has more than one @
+                    data.text[i] = data.text[i].replace(/\s*\b[^@\s]+@[^\s]+\b\s*/, _regexHandler).trim();
+                    if (data.address.length) {
+                        break;
+                    }
+                }
+            }
+        }
+
+        // If there's still is no text but a comment exixts, replace the two
+        if (!data.text.length && data.comment.length) {
+            data.text = data.comment;
+            data.comment = [];
+        }
+
+        // Keep only the first address occurence, push others to regular text
+        if (data.address.length > 1) {
+            data.text = data.text.concat(data.address.splice(1));
+        }
+
+        // Join values with spaces
+        data.text = data.text.join(' ');
+        data.address = data.address.join(' ');
+
+        if (!data.address && isGroup) {
+            return [];
+        } else {
+            address = {
+                address: data.address || data.text || '',
+                name: data.text || data.address || ''
+            };
+
+            if (address.address === address.name) {
+                if ((address.address || '').match(/@/)) {
+                    address.name = '';
+                } else {
+                    address.address = '';
+                }
+            }
+
+            addresses.push(address);
+        }
+    }
+
+    return addresses;
+}
+
+/**
+ * Creates a Tokenizer object for tokenizing address field strings
+ *
+ * @constructor
+ * @param {String} str Address field string
+ */
+class Tokenizer {
+    constructor(str) {
+        this.str = (str || '').toString();
+        this.operatorCurrent = '';
+        this.operatorExpecting = '';
+        this.node = null;
+        this.escaped = false;
+
+        this.list = [];
+        /**
+         * Operator tokens and which tokens are expected to end the sequence
+         */
+        this.operators = {
+            '"': '"',
+            '(': ')',
+            '<': '>',
+            ',': '',
+            ':': ';',
+            // Semicolons are not a legal delimiter per the RFC2822 grammar other
+            // than for terminating a group, but they are also not valid for any
+            // other use in this context.  Given that some mail clients have
+            // historically allowed the semicolon as a delimiter equivalent to the
+            // comma in their UI, it makes sense to treat them the same as a comma
+            // when used outside of a group.
+            ';': ''
+        };
+    }
+
+    /**
+     * Tokenizes the original input string
+     *
+     * @return {Array} An array of operator|text tokens
+     */
+    tokenize() {
+        let list = [];
+
+        for (let i = 0, len = this.str.length; i < len; i++) {
+            let chr = this.str.charAt(i);
+            let nextChr = i < len - 1 ? this.str.charAt(i + 1) : null;
+            this.checkChar(chr, nextChr);
+        }
+
+        this.list.forEach(node => {
+            node.value = (node.value || '').toString().trim();
+            if (node.value) {
+                list.push(node);
+            }
+        });
+
+        return list;
+    }
+
+    /**
+     * Checks if a character is an operator or text and acts accordingly
+     *
+     * @param {String} chr Character from the address field
+     */
+    checkChar(chr, nextChr) {
+        if (this.escaped) {
+            // ignore next condition blocks
+        } else if (chr === this.operatorExpecting) {
+            this.node = {
+                type: 'operator',
+                value: chr
+            };
+
+            if (nextChr && ![' ', '\t', '\r', '\n', ',', ';'].includes(nextChr)) {
+                this.node.noBreak = true;
+            }
+
+            this.list.push(this.node);
+            this.node = null;
+            this.operatorExpecting = '';
+            this.escaped = false;
+
+            return;
+        } else if (!this.operatorExpecting && chr in this.operators) {
+            this.node = {
+                type: 'operator',
+                value: chr
+            };
+            this.list.push(this.node);
+            this.node = null;
+            this.operatorExpecting = this.operators[chr];
+            this.escaped = false;
+            return;
+        } else if (['"', "'"].includes(this.operatorExpecting) && chr === '\\') {
+            this.escaped = true;
+            return;
+        }
+
+        if (!this.node) {
+            this.node = {
+                type: 'text',
+                value: ''
+            };
+            this.list.push(this.node);
+        }
+
+        if (chr === '\n') {
+            // Convert newlines to spaces. Carriage return is ignored as \r and \n usually
+            // go together anyway and there already is a WS for \n. Lone \r means something is fishy.
+            chr = ' ';
+        }
+
+        if (chr.charCodeAt(0) >= 0x21 || [' ', '\t'].includes(chr)) {
+            // skip command bytes
+            this.node.value += chr;
+        }
+
+        this.escaped = false;
+    }
+}
+
+/**
+ * Parses structured e-mail addresses from an address field
+ *
+ * Example:
+ *
+ *    'Name <address@domain>'
+ *
+ * will be converted to
+ *
+ *     [{name: 'Name', address: 'address@domain'}]
+ *
+ * @param {String} str Address field
+ * @return {Array} An array of address objects
+ */
+function addressparser(str, options) {
+    options = options || {};
+
+    let tokenizer = new Tokenizer(str);
+    let tokens = tokenizer.tokenize();
+
+    let addresses = [];
+    let address = [];
+    let parsedAddresses = [];
+
+    tokens.forEach(token => {
+        if (token.type === 'operator' && (token.value === ',' || token.value === ';')) {
+            if (address.length) {
+                addresses.push(address);
+            }
+            address = [];
+        } else {
+            address.push(token);
+        }
+    });
+
+    if (address.length) {
+        addresses.push(address);
+    }
+
+    addresses.forEach(address => {
+        address = _handleAddress(address);
+        if (address.length) {
+            parsedAddresses = parsedAddresses.concat(address);
+        }
+    });
+
+    if (options.flatten) {
+        let addresses = [];
+        let walkAddressList = list => {
+            list.forEach(address => {
+                if (address.group) {
+                    return walkAddressList(address.group);
+                } else {
+                    addresses.push(address);
+                }
+            });
+        };
+        walkAddressList(parsedAddresses);
+        return addresses;
+    }
+
+    return parsedAddresses;
+}
+
+// expose to the world
+module.exports = addressparser;

backend/apis/nodejs/node_modules/nodemailer/lib/base64/index.js

@@ -0,0 +1,142 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+/**
+ * Encodes a Buffer into a base64 encoded string
+ *
+ * @param {Buffer} buffer Buffer to convert
+ * @returns {String} base64 encoded string
+ */
+function encode(buffer) {
+    if (typeof buffer === 'string') {
+        buffer = Buffer.from(buffer, 'utf-8');
+    }
+
+    return buffer.toString('base64');
+}
+
+/**
+ * Adds soft line breaks to a base64 string
+ *
+ * @param {String} str base64 encoded string that might need line wrapping
+ * @param {Number} [lineLength=76] Maximum allowed length for a line
+ * @returns {String} Soft-wrapped base64 encoded string
+ */
+function wrap(str, lineLength) {
+    str = (str || '').toString();
+    lineLength = lineLength || 76;
+
+    if (str.length <= lineLength) {
+        return str;
+    }
+
+    let result = [];
+    let pos = 0;
+    let chunkLength = lineLength * 1024;
+    while (pos < str.length) {
+        let wrappedLines = str
+            .substr(pos, chunkLength)
+            .replace(new RegExp('.{' + lineLength + '}', 'g'), '$&\r\n')
+            .trim();
+        result.push(wrappedLines);
+        pos += chunkLength;
+    }
+
+    return result.join('\r\n').trim();
+}
+
+/**
+ * Creates a transform stream for encoding data to base64 encoding
+ *
+ * @constructor
+ * @param {Object} options Stream options
+ * @param {Number} [options.lineLength=76] Maximum length for lines, set to false to disable wrapping
+ */
+class Encoder extends Transform {
+    constructor(options) {
+        super();
+        // init Transform
+        this.options = options || {};
+
+        if (this.options.lineLength !== false) {
+            this.options.lineLength = this.options.lineLength || 76;
+        }
+
+        this._curLine = '';
+        this._remainingBytes = false;
+
+        this.inputBytes = 0;
+        this.outputBytes = 0;
+    }
+
+    _transform(chunk, encoding, done) {
+        if (encoding !== 'buffer') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        if (!chunk || !chunk.length) {
+            return setImmediate(done);
+        }
+
+        this.inputBytes += chunk.length;
+
+        if (this._remainingBytes && this._remainingBytes.length) {
+            chunk = Buffer.concat([this._remainingBytes, chunk], this._remainingBytes.length + chunk.length);
+            this._remainingBytes = false;
+        }
+
+        if (chunk.length % 3) {
+            this._remainingBytes = chunk.slice(chunk.length - (chunk.length % 3));
+            chunk = chunk.slice(0, chunk.length - (chunk.length % 3));
+        } else {
+            this._remainingBytes = false;
+        }
+
+        let b64 = this._curLine + encode(chunk);
+
+        if (this.options.lineLength) {
+            b64 = wrap(b64, this.options.lineLength);
+
+            // remove last line as it is still most probably incomplete
+            let lastLF = b64.lastIndexOf('\n');
+            if (lastLF < 0) {
+                this._curLine = b64;
+                b64 = '';
+            } else if (lastLF === b64.length - 1) {
+                this._curLine = '';
+            } else {
+                this._curLine = b64.substr(lastLF + 1);
+                b64 = b64.substr(0, lastLF + 1);
+            }
+        }
+
+        if (b64) {
+            this.outputBytes += b64.length;
+            this.push(Buffer.from(b64, 'ascii'));
+        }
+
+        setImmediate(done);
+    }
+
+    _flush(done) {
+        if (this._remainingBytes && this._remainingBytes.length) {
+            this._curLine += encode(this._remainingBytes);
+        }
+
+        if (this._curLine) {
+            this._curLine = wrap(this._curLine, this.options.lineLength);
+            this.outputBytes += this._curLine.length;
+            this.push(this._curLine, 'ascii');
+            this._curLine = '';
+        }
+        done();
+    }
+}
+
+// expose to the world
+module.exports = {
+    encode,
+    wrap,
+    Encoder
+};

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/index.js

@@ -0,0 +1,251 @@
+'use strict';
+
+// FIXME:
+// replace this Transform mess with a method that pipes input argument to output argument
+
+const MessageParser = require('./message-parser');
+const RelaxedBody = require('./relaxed-body');
+const sign = require('./sign');
+const PassThrough = require('stream').PassThrough;
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+
+const DKIM_ALGO = 'sha256';
+const MAX_MESSAGE_SIZE = 128 * 1024; // buffer messages larger than this to disk
+
+/*
+// Usage:
+
+let dkim = new DKIM({
+    domainName: 'example.com',
+    keySelector: 'key-selector',
+    privateKey,
+    cacheDir: '/tmp'
+});
+dkim.sign(input).pipe(process.stdout);
+
+// Where inputStream is a rfc822 message (either a stream, string or Buffer)
+// and outputStream is a DKIM signed rfc822 message
+*/
+
+class DKIMSigner {
+    constructor(options, keys, input, output) {
+        this.options = options || {};
+        this.keys = keys;
+
+        this.cacheTreshold = Number(this.options.cacheTreshold) || MAX_MESSAGE_SIZE;
+        this.hashAlgo = this.options.hashAlgo || DKIM_ALGO;
+
+        this.cacheDir = this.options.cacheDir || false;
+
+        this.chunks = [];
+        this.chunklen = 0;
+        this.readPos = 0;
+        this.cachePath = this.cacheDir ? path.join(this.cacheDir, 'message.' + Date.now() + '-' + crypto.randomBytes(14).toString('hex')) : false;
+        this.cache = false;
+
+        this.headers = false;
+        this.bodyHash = false;
+        this.parser = false;
+        this.relaxedBody = false;
+
+        this.input = input;
+        this.output = output;
+        this.output.usingCache = false;
+
+        this.hasErrored = false;
+
+        this.input.on('error', err => {
+            this.hasErrored = true;
+            this.cleanup();
+            output.emit('error', err);
+        });
+    }
+
+    cleanup() {
+        if (!this.cache || !this.cachePath) {
+            return;
+        }
+        fs.unlink(this.cachePath, () => false);
+    }
+
+    createReadCache() {
+        // pipe remainings to cache file
+        this.cache = fs.createReadStream(this.cachePath);
+        this.cache.once('error', err => {
+            this.cleanup();
+            this.output.emit('error', err);
+        });
+        this.cache.once('close', () => {
+            this.cleanup();
+        });
+        this.cache.pipe(this.output);
+    }
+
+    sendNextChunk() {
+        if (this.hasErrored) {
+            return;
+        }
+
+        if (this.readPos >= this.chunks.length) {
+            if (!this.cache) {
+                return this.output.end();
+            }
+            return this.createReadCache();
+        }
+        let chunk = this.chunks[this.readPos++];
+        if (this.output.write(chunk) === false) {
+            return this.output.once('drain', () => {
+                this.sendNextChunk();
+            });
+        }
+        setImmediate(() => this.sendNextChunk());
+    }
+
+    sendSignedOutput() {
+        let keyPos = 0;
+        let signNextKey = () => {
+            if (keyPos >= this.keys.length) {
+                this.output.write(this.parser.rawHeaders);
+                return setImmediate(() => this.sendNextChunk());
+            }
+            let key = this.keys[keyPos++];
+            let dkimField = sign(this.headers, this.hashAlgo, this.bodyHash, {
+                domainName: key.domainName,
+                keySelector: key.keySelector,
+                privateKey: key.privateKey,
+                headerFieldNames: this.options.headerFieldNames,
+                skipFields: this.options.skipFields
+            });
+            if (dkimField) {
+                this.output.write(Buffer.from(dkimField + '\r\n'));
+            }
+            return setImmediate(signNextKey);
+        };
+
+        if (this.bodyHash && this.headers) {
+            return signNextKey();
+        }
+
+        this.output.write(this.parser.rawHeaders);
+        this.sendNextChunk();
+    }
+
+    createWriteCache() {
+        this.output.usingCache = true;
+        // pipe remainings to cache file
+        this.cache = fs.createWriteStream(this.cachePath);
+        this.cache.once('error', err => {
+            this.cleanup();
+            // drain input
+            this.relaxedBody.unpipe(this.cache);
+            this.relaxedBody.on('readable', () => {
+                while (this.relaxedBody.read() !== null) {
+                    // do nothing
+                }
+            });
+            this.hasErrored = true;
+            // emit error
+            this.output.emit('error', err);
+        });
+        this.cache.once('close', () => {
+            this.sendSignedOutput();
+        });
+        this.relaxedBody.removeAllListeners('readable');
+        this.relaxedBody.pipe(this.cache);
+    }
+
+    signStream() {
+        this.parser = new MessageParser();
+        this.relaxedBody = new RelaxedBody({
+            hashAlgo: this.hashAlgo
+        });
+
+        this.parser.on('headers', value => {
+            this.headers = value;
+        });
+
+        this.relaxedBody.on('hash', value => {
+            this.bodyHash = value;
+        });
+
+        this.relaxedBody.on('readable', () => {
+            let chunk;
+            if (this.cache) {
+                return;
+            }
+            while ((chunk = this.relaxedBody.read()) !== null) {
+                this.chunks.push(chunk);
+                this.chunklen += chunk.length;
+                if (this.chunklen >= this.cacheTreshold && this.cachePath) {
+                    return this.createWriteCache();
+                }
+            }
+        });
+
+        this.relaxedBody.on('end', () => {
+            if (this.cache) {
+                return;
+            }
+            this.sendSignedOutput();
+        });
+
+        this.parser.pipe(this.relaxedBody);
+        setImmediate(() => this.input.pipe(this.parser));
+    }
+}
+
+class DKIM {
+    constructor(options) {
+        this.options = options || {};
+        this.keys = [].concat(
+            this.options.keys || {
+                domainName: options.domainName,
+                keySelector: options.keySelector,
+                privateKey: options.privateKey
+            }
+        );
+    }
+
+    sign(input, extraOptions) {
+        let output = new PassThrough();
+        let inputStream = input;
+        let writeValue = false;
+
+        if (Buffer.isBuffer(input)) {
+            writeValue = input;
+            inputStream = new PassThrough();
+        } else if (typeof input === 'string') {
+            writeValue = Buffer.from(input);
+            inputStream = new PassThrough();
+        }
+
+        let options = this.options;
+        if (extraOptions && Object.keys(extraOptions).length) {
+            options = {};
+            Object.keys(this.options || {}).forEach(key => {
+                options[key] = this.options[key];
+            });
+            Object.keys(extraOptions || {}).forEach(key => {
+                if (!(key in options)) {
+                    options[key] = extraOptions[key];
+                }
+            });
+        }
+
+        let signer = new DKIMSigner(options, this.keys, inputStream, output);
+        setImmediate(() => {
+            signer.signStream();
+            if (writeValue) {
+                setImmediate(() => {
+                    inputStream.end(writeValue);
+                });
+            }
+        });
+
+        return output;
+    }
+}
+
+module.exports = DKIM;

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/message-parser.js

@@ -0,0 +1,155 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+/**
+ * MessageParser instance is a transform stream that separates message headers
+ * from the rest of the body. Headers are emitted with the 'headers' event. Message
+ * body is passed on as the resulting stream.
+ */
+class MessageParser extends Transform {
+    constructor(options) {
+        super(options);
+        this.lastBytes = Buffer.alloc(4);
+        this.headersParsed = false;
+        this.headerBytes = 0;
+        this.headerChunks = [];
+        this.rawHeaders = false;
+        this.bodySize = 0;
+    }
+
+    /**
+     * Keeps count of the last 4 bytes in order to detect line breaks on chunk boundaries
+     *
+     * @param {Buffer} data Next data chunk from the stream
+     */
+    updateLastBytes(data) {
+        let lblen = this.lastBytes.length;
+        let nblen = Math.min(data.length, lblen);
+
+        // shift existing bytes
+        for (let i = 0, len = lblen - nblen; i < len; i++) {
+            this.lastBytes[i] = this.lastBytes[i + nblen];
+        }
+
+        // add new bytes
+        for (let i = 1; i <= nblen; i++) {
+            this.lastBytes[lblen - i] = data[data.length - i];
+        }
+    }
+
+    /**
+     * Finds and removes message headers from the remaining body. We want to keep
+     * headers separated until final delivery to be able to modify these
+     *
+     * @param {Buffer} data Next chunk of data
+     * @return {Boolean} Returns true if headers are already found or false otherwise
+     */
+    checkHeaders(data) {
+        if (this.headersParsed) {
+            return true;
+        }
+
+        let lblen = this.lastBytes.length;
+        let headerPos = 0;
+        this.curLinePos = 0;
+        for (let i = 0, len = this.lastBytes.length + data.length; i < len; i++) {
+            let chr;
+            if (i < lblen) {
+                chr = this.lastBytes[i];
+            } else {
+                chr = data[i - lblen];
+            }
+            if (chr === 0x0a && i) {
+                let pr1 = i - 1 < lblen ? this.lastBytes[i - 1] : data[i - 1 - lblen];
+                let pr2 = i > 1 ? (i - 2 < lblen ? this.lastBytes[i - 2] : data[i - 2 - lblen]) : false;
+                if (pr1 === 0x0a) {
+                    this.headersParsed = true;
+                    headerPos = i - lblen + 1;
+                    this.headerBytes += headerPos;
+                    break;
+                } else if (pr1 === 0x0d && pr2 === 0x0a) {
+                    this.headersParsed = true;
+                    headerPos = i - lblen + 1;
+                    this.headerBytes += headerPos;
+                    break;
+                }
+            }
+        }
+
+        if (this.headersParsed) {
+            this.headerChunks.push(data.slice(0, headerPos));
+            this.rawHeaders = Buffer.concat(this.headerChunks, this.headerBytes);
+            this.headerChunks = null;
+            this.emit('headers', this.parseHeaders());
+            if (data.length - 1 > headerPos) {
+                let chunk = data.slice(headerPos);
+                this.bodySize += chunk.length;
+                // this would be the first chunk of data sent downstream
+                setImmediate(() => this.push(chunk));
+            }
+            return false;
+        } else {
+            this.headerBytes += data.length;
+            this.headerChunks.push(data);
+        }
+
+        // store last 4 bytes to catch header break
+        this.updateLastBytes(data);
+
+        return false;
+    }
+
+    _transform(chunk, encoding, callback) {
+        if (!chunk || !chunk.length) {
+            return callback();
+        }
+
+        if (typeof chunk === 'string') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        let headersFound;
+
+        try {
+            headersFound = this.checkHeaders(chunk);
+        } catch (E) {
+            return callback(E);
+        }
+
+        if (headersFound) {
+            this.bodySize += chunk.length;
+            this.push(chunk);
+        }
+
+        setImmediate(callback);
+    }
+
+    _flush(callback) {
+        if (this.headerChunks) {
+            let chunk = Buffer.concat(this.headerChunks, this.headerBytes);
+            this.bodySize += chunk.length;
+            this.push(chunk);
+            this.headerChunks = null;
+        }
+        callback();
+    }
+
+    parseHeaders() {
+        let lines = (this.rawHeaders || '').toString().split(/\r?\n/);
+        for (let i = lines.length - 1; i > 0; i--) {
+            if (/^\s/.test(lines[i])) {
+                lines[i - 1] += '\n' + lines[i];
+                lines.splice(i, 1);
+            }
+        }
+        return lines
+            .filter(line => line.trim())
+            .map(line => ({
+                key: line.substr(0, line.indexOf(':')).trim().toLowerCase(),
+                line
+            }));
+    }
+}
+
+module.exports = MessageParser;

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/relaxed-body.js

@@ -0,0 +1,154 @@
+'use strict';
+
+// streams through a message body and calculates relaxed body hash
+
+const Transform = require('stream').Transform;
+const crypto = require('crypto');
+
+class RelaxedBody extends Transform {
+    constructor(options) {
+        super();
+        options = options || {};
+        this.chunkBuffer = [];
+        this.chunkBufferLen = 0;
+        this.bodyHash = crypto.createHash(options.hashAlgo || 'sha1');
+        this.remainder = '';
+        this.byteLength = 0;
+
+        this.debug = options.debug;
+        this._debugBody = options.debug ? [] : false;
+    }
+
+    updateHash(chunk) {
+        let bodyStr;
+
+        // find next remainder
+        let nextRemainder = '';
+
+        // This crux finds and removes the spaces from the last line and the newline characters after the last non-empty line
+        // If we get another chunk that does not match this description then we can restore the previously processed data
+        let state = 'file';
+        for (let i = chunk.length - 1; i >= 0; i--) {
+            let c = chunk[i];
+
+            if (state === 'file' && (c === 0x0a || c === 0x0d)) {
+                // do nothing, found \n or \r at the end of chunk, stil end of file
+            } else if (state === 'file' && (c === 0x09 || c === 0x20)) {
+                // switch to line ending mode, this is the last non-empty line
+                state = 'line';
+            } else if (state === 'line' && (c === 0x09 || c === 0x20)) {
+                // do nothing, found ' ' or \t at the end of line, keep processing the last non-empty line
+            } else if (state === 'file' || state === 'line') {
+                // non line/file ending character found, switch to body mode
+                state = 'body';
+                if (i === chunk.length - 1) {
+                    // final char is not part of line end or file end, so do nothing
+                    break;
+                }
+            }
+
+            if (i === 0) {
+                // reached to the beginning of the chunk, check if it is still about the ending
+                // and if the remainder also matches
+                if (
+                    (state === 'file' && (!this.remainder || /[\r\n]$/.test(this.remainder))) ||
+                    (state === 'line' && (!this.remainder || /[ \t]$/.test(this.remainder)))
+                ) {
+                    // keep everything
+                    this.remainder += chunk.toString('binary');
+                    return;
+                } else if (state === 'line' || state === 'file') {
+                    // process existing remainder as normal line but store the current chunk
+                    nextRemainder = chunk.toString('binary');
+                    chunk = false;
+                    break;
+                }
+            }
+
+            if (state !== 'body') {
+                continue;
+            }
+
+            // reached first non ending byte
+            nextRemainder = chunk.slice(i + 1).toString('binary');
+            chunk = chunk.slice(0, i + 1);
+            break;
+        }
+
+        let needsFixing = !!this.remainder;
+        if (chunk && !needsFixing) {
+            // check if we even need to change anything
+            for (let i = 0, len = chunk.length; i < len; i++) {
+                if (i && chunk[i] === 0x0a && chunk[i - 1] !== 0x0d) {
+                    // missing \r before \n
+                    needsFixing = true;
+                    break;
+                } else if (i && chunk[i] === 0x0d && chunk[i - 1] === 0x20) {
+                    // trailing WSP found
+                    needsFixing = true;
+                    break;
+                } else if (i && chunk[i] === 0x20 && chunk[i - 1] === 0x20) {
+                    // multiple spaces found, needs to be replaced with just one
+                    needsFixing = true;
+                    break;
+                } else if (chunk[i] === 0x09) {
+                    // TAB found, needs to be replaced with a space
+                    needsFixing = true;
+                    break;
+                }
+            }
+        }
+
+        if (needsFixing) {
+            bodyStr = this.remainder + (chunk ? chunk.toString('binary') : '');
+            this.remainder = nextRemainder;
+            bodyStr = bodyStr
+                .replace(/\r?\n/g, '\n') // use js line endings
+                .replace(/[ \t]*$/gm, '') // remove line endings, rtrim
+                .replace(/[ \t]+/gm, ' ') // single spaces
+                .replace(/\n/g, '\r\n'); // restore rfc822 line endings
+            chunk = Buffer.from(bodyStr, 'binary');
+        } else if (nextRemainder) {
+            this.remainder = nextRemainder;
+        }
+
+        if (this.debug) {
+            this._debugBody.push(chunk);
+        }
+        this.bodyHash.update(chunk);
+    }
+
+    _transform(chunk, encoding, callback) {
+        if (!chunk || !chunk.length) {
+            return callback();
+        }
+
+        if (typeof chunk === 'string') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        this.updateHash(chunk);
+
+        this.byteLength += chunk.length;
+        this.push(chunk);
+        callback();
+    }
+
+    _flush(callback) {
+        // generate final hash and emit it
+        if (/[\r\n]$/.test(this.remainder) && this.byteLength > 2) {
+            // add terminating line end
+            this.bodyHash.update(Buffer.from('\r\n'));
+        }
+        if (!this.byteLength) {
+            // emit empty line buffer to keep the stream flowing
+            this.push(Buffer.from('\r\n'));
+            // this.bodyHash.update(Buffer.from('\r\n'));
+        }
+
+        this.emit('hash', this.bodyHash.digest('base64'), this.debug ? Buffer.concat(this._debugBody) : false);
+        callback();
+    }
+}
+
+module.exports = RelaxedBody;

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/sign.js

@@ -0,0 +1,117 @@
+'use strict';
+
+const punycode = require('../punycode');
+const mimeFuncs = require('../mime-funcs');
+const crypto = require('crypto');
+
+/**
+ * Returns DKIM signature header line
+ *
+ * @param {Object} headers Parsed headers object from MessageParser
+ * @param {String} bodyHash Base64 encoded hash of the message
+ * @param {Object} options DKIM options
+ * @param {String} options.domainName Domain name to be signed for
+ * @param {String} options.keySelector DKIM key selector to use
+ * @param {String} options.privateKey DKIM private key to use
+ * @return {String} Complete header line
+ */
+
+module.exports = (headers, hashAlgo, bodyHash, options) => {
+    options = options || {};
+
+    // all listed fields from RFC4871 #5.5
+    let defaultFieldNames =
+        'From:Sender:Reply-To:Subject:Date:Message-ID:To:' +
+        'Cc:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID:' +
+        'Content-Description:Resent-Date:Resent-From:Resent-Sender:' +
+        'Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:' +
+        'List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post:' +
+        'List-Owner:List-Archive';
+
+    let fieldNames = options.headerFieldNames || defaultFieldNames;
+
+    let canonicalizedHeaderData = relaxedHeaders(headers, fieldNames, options.skipFields);
+    let dkimHeader = generateDKIMHeader(options.domainName, options.keySelector, canonicalizedHeaderData.fieldNames, hashAlgo, bodyHash);
+
+    let signer, signature;
+
+    canonicalizedHeaderData.headers += 'dkim-signature:' + relaxedHeaderLine(dkimHeader);
+
+    signer = crypto.createSign(('rsa-' + hashAlgo).toUpperCase());
+    signer.update(canonicalizedHeaderData.headers);
+    try {
+        signature = signer.sign(options.privateKey, 'base64');
+    } catch (E) {
+        return false;
+    }
+
+    return dkimHeader + signature.replace(/(^.{73}|.{75}(?!\r?\n|\r))/g, '$&\r\n ').trim();
+};
+
+module.exports.relaxedHeaders = relaxedHeaders;
+
+function generateDKIMHeader(domainName, keySelector, fieldNames, hashAlgo, bodyHash) {
+    let dkim = [
+        'v=1',
+        'a=rsa-' + hashAlgo,
+        'c=relaxed/relaxed',
+        'd=' + punycode.toASCII(domainName),
+        'q=dns/txt',
+        's=' + keySelector,
+        'bh=' + bodyHash,
+        'h=' + fieldNames
+    ].join('; ');
+
+    return mimeFuncs.foldLines('DKIM-Signature: ' + dkim, 76) + ';\r\n b=';
+}
+
+function relaxedHeaders(headers, fieldNames, skipFields) {
+    let includedFields = new Set();
+    let skip = new Set();
+    let headerFields = new Map();
+
+    (skipFields || '')
+        .toLowerCase()
+        .split(':')
+        .forEach(field => {
+            skip.add(field.trim());
+        });
+
+    (fieldNames || '')
+        .toLowerCase()
+        .split(':')
+        .filter(field => !skip.has(field.trim()))
+        .forEach(field => {
+            includedFields.add(field.trim());
+        });
+
+    for (let i = headers.length - 1; i >= 0; i--) {
+        let line = headers[i];
+        // only include the first value from bottom to top
+        if (includedFields.has(line.key) && !headerFields.has(line.key)) {
+            headerFields.set(line.key, relaxedHeaderLine(line.line));
+        }
+    }
+
+    let headersList = [];
+    let fields = [];
+    includedFields.forEach(field => {
+        if (headerFields.has(field)) {
+            fields.push(field);
+            headersList.push(field + ':' + headerFields.get(field));
+        }
+    });
+
+    return {
+        headers: headersList.join('\r\n') + '\r\n',
+        fieldNames: fields.join(':')
+    };
+}
+
+function relaxedHeaderLine(line) {
+    return line
+        .substr(line.indexOf(':') + 1)
+        .replace(/\r?\n/g, '')
+        .replace(/\s+/g, ' ')
+        .trim();
+}

backend/apis/nodejs/node_modules/nodemailer/lib/fetch/cookies.js

@@ -0,0 +1,281 @@
+'use strict';
+
+// module to handle cookies
+
+const urllib = require('url');
+
+const SESSION_TIMEOUT = 1800; // 30 min
+
+/**
+ * Creates a biskviit cookie jar for managing cookie values in memory
+ *
+ * @constructor
+ * @param {Object} [options] Optional options object
+ */
+class Cookies {
+    constructor(options) {
+        this.options = options || {};
+        this.cookies = [];
+    }
+
+    /**
+     * Stores a cookie string to the cookie storage
+     *
+     * @param {String} cookieStr Value from the 'Set-Cookie:' header
+     * @param {String} url Current URL
+     */
+    set(cookieStr, url) {
+        let urlparts = urllib.parse(url || '');
+        let cookie = this.parse(cookieStr);
+        let domain;
+
+        if (cookie.domain) {
+            domain = cookie.domain.replace(/^\./, '');
+
+            // do not allow cross origin cookies
+            if (
+                // can't be valid if the requested domain is shorter than current hostname
+                urlparts.hostname.length < domain.length ||
+                // prefix domains with dot to be sure that partial matches are not used
+                ('.' + urlparts.hostname).substr(-domain.length + 1) !== '.' + domain
+            ) {
+                cookie.domain = urlparts.hostname;
+            }
+        } else {
+            cookie.domain = urlparts.hostname;
+        }
+
+        if (!cookie.path) {
+            cookie.path = this.getPath(urlparts.pathname);
+        }
+
+        // if no expire date, then use sessionTimeout value
+        if (!cookie.expires) {
+            cookie.expires = new Date(Date.now() + (Number(this.options.sessionTimeout || SESSION_TIMEOUT) || SESSION_TIMEOUT) * 1000);
+        }
+
+        return this.add(cookie);
+    }
+
+    /**
+     * Returns cookie string for the 'Cookie:' header.
+     *
+     * @param {String} url URL to check for
+     * @returns {String} Cookie header or empty string if no matches were found
+     */
+    get(url) {
+        return this.list(url)
+            .map(cookie => cookie.name + '=' + cookie.value)
+            .join('; ');
+    }
+
+    /**
+     * Lists all valied cookie objects for the specified URL
+     *
+     * @param {String} url URL to check for
+     * @returns {Array} An array of cookie objects
+     */
+    list(url) {
+        let result = [];
+        let i;
+        let cookie;
+
+        for (i = this.cookies.length - 1; i >= 0; i--) {
+            cookie = this.cookies[i];
+
+            if (this.isExpired(cookie)) {
+                this.cookies.splice(i, i);
+                continue;
+            }
+
+            if (this.match(cookie, url)) {
+                result.unshift(cookie);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * Parses cookie string from the 'Set-Cookie:' header
+     *
+     * @param {String} cookieStr String from the 'Set-Cookie:' header
+     * @returns {Object} Cookie object
+     */
+    parse(cookieStr) {
+        let cookie = {};
+
+        (cookieStr || '')
+            .toString()
+            .split(';')
+            .forEach(cookiePart => {
+                let valueParts = cookiePart.split('=');
+                let key = valueParts.shift().trim().toLowerCase();
+                let value = valueParts.join('=').trim();
+                let domain;
+
+                if (!key) {
+                    // skip empty parts
+                    return;
+                }
+
+                switch (key) {
+                    case 'expires':
+                        value = new Date(value);
+                        // ignore date if can not parse it
+                        if (value.toString() !== 'Invalid Date') {
+                            cookie.expires = value;
+                        }
+                        break;
+
+                    case 'path':
+                        cookie.path = value;
+                        break;
+
+                    case 'domain':
+                        domain = value.toLowerCase();
+                        if (domain.length && domain.charAt(0) !== '.') {
+                            domain = '.' + domain; // ensure preceeding dot for user set domains
+                        }
+                        cookie.domain = domain;
+                        break;
+
+                    case 'max-age':
+                        cookie.expires = new Date(Date.now() + (Number(value) || 0) * 1000);
+                        break;
+
+                    case 'secure':
+                        cookie.secure = true;
+                        break;
+
+                    case 'httponly':
+                        cookie.httponly = true;
+                        break;
+
+                    default:
+                        if (!cookie.name) {
+                            cookie.name = key;
+                            cookie.value = value;
+                        }
+                }
+            });
+
+        return cookie;
+    }
+
+    /**
+     * Checks if a cookie object is valid for a specified URL
+     *
+     * @param {Object} cookie Cookie object
+     * @param {String} url URL to check for
+     * @returns {Boolean} true if cookie is valid for specifiec URL
+     */
+    match(cookie, url) {
+        let urlparts = urllib.parse(url || '');
+
+        // check if hostname matches
+        // .foo.com also matches subdomains, foo.com does not
+        if (
+            urlparts.hostname !== cookie.domain &&
+            (cookie.domain.charAt(0) !== '.' || ('.' + urlparts.hostname).substr(-cookie.domain.length) !== cookie.domain)
+        ) {
+            return false;
+        }
+
+        // check if path matches
+        let path = this.getPath(urlparts.pathname);
+        if (path.substr(0, cookie.path.length) !== cookie.path) {
+            return false;
+        }
+
+        // check secure argument
+        if (cookie.secure && urlparts.protocol !== 'https:') {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Adds (or updates/removes if needed) a cookie object to the cookie storage
+     *
+     * @param {Object} cookie Cookie value to be stored
+     */
+    add(cookie) {
+        let i;
+        let len;
+
+        // nothing to do here
+        if (!cookie || !cookie.name) {
+            return false;
+        }
+
+        // overwrite if has same params
+        for (i = 0, len = this.cookies.length; i < len; i++) {
+            if (this.compare(this.cookies[i], cookie)) {
+                // check if the cookie needs to be removed instead
+                if (this.isExpired(cookie)) {
+                    this.cookies.splice(i, 1); // remove expired/unset cookie
+                    return false;
+                }
+
+                this.cookies[i] = cookie;
+                return true;
+            }
+        }
+
+        // add as new if not already expired
+        if (!this.isExpired(cookie)) {
+            this.cookies.push(cookie);
+        }
+
+        return true;
+    }
+
+    /**
+     * Checks if two cookie objects are the same
+     *
+     * @param {Object} a Cookie to check against
+     * @param {Object} b Cookie to check against
+     * @returns {Boolean} True, if the cookies are the same
+     */
+    compare(a, b) {
+        return a.name === b.name && a.path === b.path && a.domain === b.domain && a.secure === b.secure && a.httponly === a.httponly;
+    }
+
+    /**
+     * Checks if a cookie is expired
+     *
+     * @param {Object} cookie Cookie object to check against
+     * @returns {Boolean} True, if the cookie is expired
+     */
+    isExpired(cookie) {
+        return (cookie.expires && cookie.expires < new Date()) || !cookie.value;
+    }
+
+    /**
+     * Returns normalized cookie path for an URL path argument
+     *
+     * @param {String} pathname
+     * @returns {String} Normalized path
+     */
+    getPath(pathname) {
+        let path = (pathname || '/').split('/');
+        path.pop(); // remove filename part
+        path = path.join('/').trim();
+
+        // ensure path prefix /
+        if (path.charAt(0) !== '/') {
+            path = '/' + path;
+        }
+
+        // ensure path suffix /
+        if (path.substr(-1) !== '/') {
+            path += '/';
+        }
+
+        return path;
+    }
+}
+
+module.exports = Cookies;

backend/apis/nodejs/node_modules/nodemailer/lib/fetch/index.js

@@ -0,0 +1,274 @@
+'use strict';
+
+const http = require('http');
+const https = require('https');
+const urllib = require('url');
+const zlib = require('zlib');
+const PassThrough = require('stream').PassThrough;
+const Cookies = require('./cookies');
+const packageData = require('../../package.json');
+const net = require('net');
+
+const MAX_REDIRECTS = 5;
+
+module.exports = function (url, options) {
+    return nmfetch(url, options);
+};
+
+module.exports.Cookies = Cookies;
+
+function nmfetch(url, options) {
+    options = options || {};
+
+    options.fetchRes = options.fetchRes || new PassThrough();
+    options.cookies = options.cookies || new Cookies();
+    options.redirects = options.redirects || 0;
+    options.maxRedirects = isNaN(options.maxRedirects) ? MAX_REDIRECTS : options.maxRedirects;
+
+    if (options.cookie) {
+        [].concat(options.cookie || []).forEach(cookie => {
+            options.cookies.set(cookie, url);
+        });
+        options.cookie = false;
+    }
+
+    let fetchRes = options.fetchRes;
+    let parsed = urllib.parse(url);
+    let method = (options.method || '').toString().trim().toUpperCase() || 'GET';
+    let finished = false;
+    let cookies;
+    let body;
+
+    let handler = parsed.protocol === 'https:' ? https : http;
+
+    let headers = {
+        'accept-encoding': 'gzip,deflate',
+        'user-agent': 'nodemailer/' + packageData.version
+    };
+
+    Object.keys(options.headers || {}).forEach(key => {
+        headers[key.toLowerCase().trim()] = options.headers[key];
+    });
+
+    if (options.userAgent) {
+        headers['user-agent'] = options.userAgent;
+    }
+
+    if (parsed.auth) {
+        headers.Authorization = 'Basic ' + Buffer.from(parsed.auth).toString('base64');
+    }
+
+    if ((cookies = options.cookies.get(url))) {
+        headers.cookie = cookies;
+    }
+
+    if (options.body) {
+        if (options.contentType !== false) {
+            headers['Content-Type'] = options.contentType || 'application/x-www-form-urlencoded';
+        }
+
+        if (typeof options.body.pipe === 'function') {
+            // it's a stream
+            headers['Transfer-Encoding'] = 'chunked';
+            body = options.body;
+            body.on('error', err => {
+                if (finished) {
+                    return;
+                }
+                finished = true;
+                err.type = 'FETCH';
+                err.sourceUrl = url;
+                fetchRes.emit('error', err);
+            });
+        } else {
+            if (options.body instanceof Buffer) {
+                body = options.body;
+            } else if (typeof options.body === 'object') {
+                try {
+                    // encodeURIComponent can fail on invalid input (partial emoji etc.)
+                    body = Buffer.from(
+                        Object.keys(options.body)
+                            .map(key => {
+                                let value = options.body[key].toString().trim();
+                                return encodeURIComponent(key) + '=' + encodeURIComponent(value);
+                            })
+                            .join('&')
+                    );
+                } catch (E) {
+                    if (finished) {
+                        return;
+                    }
+                    finished = true;
+                    E.type = 'FETCH';
+                    E.sourceUrl = url;
+                    fetchRes.emit('error', E);
+                    return;
+                }
+            } else {
+                body = Buffer.from(options.body.toString().trim());
+            }
+
+            headers['Content-Type'] = options.contentType || 'application/x-www-form-urlencoded';
+            headers['Content-Length'] = body.length;
+        }
+        // if method is not provided, use POST instead of GET
+        method = (options.method || '').toString().trim().toUpperCase() || 'POST';
+    }
+
+    let req;
+    let reqOptions = {
+        method,
+        host: parsed.hostname,
+        path: parsed.path,
+        port: parsed.port ? parsed.port : parsed.protocol === 'https:' ? 443 : 80,
+        headers,
+        rejectUnauthorized: false,
+        agent: false
+    };
+
+    if (options.tls) {
+        Object.keys(options.tls).forEach(key => {
+            reqOptions[key] = options.tls[key];
+        });
+    }
+
+    if (parsed.protocol === 'https:' && parsed.hostname && parsed.hostname !== reqOptions.host && !net.isIP(parsed.hostname) && !reqOptions.servername) {
+        reqOptions.servername = parsed.hostname;
+    }
+
+    try {
+        req = handler.request(reqOptions);
+    } catch (E) {
+        finished = true;
+        setImmediate(() => {
+            E.type = 'FETCH';
+            E.sourceUrl = url;
+            fetchRes.emit('error', E);
+        });
+        return fetchRes;
+    }
+
+    if (options.timeout) {
+        req.setTimeout(options.timeout, () => {
+            if (finished) {
+                return;
+            }
+            finished = true;
+            req.abort();
+            let err = new Error('Request Timeout');
+            err.type = 'FETCH';
+            err.sourceUrl = url;
+            fetchRes.emit('error', err);
+        });
+    }
+
+    req.on('error', err => {
+        if (finished) {
+            return;
+        }
+        finished = true;
+        err.type = 'FETCH';
+        err.sourceUrl = url;
+        fetchRes.emit('error', err);
+    });
+
+    req.on('response', res => {
+        let inflate;
+
+        if (finished) {
+            return;
+        }
+
+        switch (res.headers['content-encoding']) {
+            case 'gzip':
+            case 'deflate':
+                inflate = zlib.createUnzip();
+                break;
+        }
+
+        if (res.headers['set-cookie']) {
+            [].concat(res.headers['set-cookie'] || []).forEach(cookie => {
+                options.cookies.set(cookie, url);
+            });
+        }
+
+        if ([301, 302, 303, 307, 308].includes(res.statusCode) && res.headers.location) {
+            // redirect
+            options.redirects++;
+            if (options.redirects > options.maxRedirects) {
+                finished = true;
+                let err = new Error('Maximum redirect count exceeded');
+                err.type = 'FETCH';
+                err.sourceUrl = url;
+                fetchRes.emit('error', err);
+                req.abort();
+                return;
+            }
+            // redirect does not include POST body
+            options.method = 'GET';
+            options.body = false;
+            return nmfetch(urllib.resolve(url, res.headers.location), options);
+        }
+
+        fetchRes.statusCode = res.statusCode;
+        fetchRes.headers = res.headers;
+
+        if (res.statusCode >= 300 && !options.allowErrorResponse) {
+            finished = true;
+            let err = new Error('Invalid status code ' + res.statusCode);
+            err.type = 'FETCH';
+            err.sourceUrl = url;
+            fetchRes.emit('error', err);
+            req.abort();
+            return;
+        }
+
+        res.on('error', err => {
+            if (finished) {
+                return;
+            }
+            finished = true;
+            err.type = 'FETCH';
+            err.sourceUrl = url;
+            fetchRes.emit('error', err);
+            req.abort();
+        });
+
+        if (inflate) {
+            res.pipe(inflate).pipe(fetchRes);
+            inflate.on('error', err => {
+                if (finished) {
+                    return;
+                }
+                finished = true;
+                err.type = 'FETCH';
+                err.sourceUrl = url;
+                fetchRes.emit('error', err);
+                req.abort();
+            });
+        } else {
+            res.pipe(fetchRes);
+        }
+    });
+
+    setImmediate(() => {
+        if (body) {
+            try {
+                if (typeof body.pipe === 'function') {
+                    return body.pipe(req);
+                } else {
+                    req.write(body);
+                }
+            } catch (err) {
+                finished = true;
+                err.type = 'FETCH';
+                err.sourceUrl = url;
+                fetchRes.emit('error', err);
+                return;
+            }
+        }
+        req.end();
+    });
+
+    return fetchRes;
+}

backend/apis/nodejs/node_modules/nodemailer/lib/json-transport/index.js

@@ -0,0 +1,82 @@
+'use strict';
+
+const packageData = require('../../package.json');
+const shared = require('../shared');
+
+/**
+ * Generates a Transport object to generate JSON output
+ *
+ * @constructor
+ * @param {Object} optional config parameter
+ */
+class JSONTransport {
+    constructor(options) {
+        options = options || {};
+
+        this.options = options || {};
+
+        this.name = 'JSONTransport';
+        this.version = packageData.version;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'json-transport'
+        });
+    }
+
+    /**
+     * <p>Compiles a mailcomposer message and forwards it to handler that sends it.</p>
+     *
+     * @param {Object} emailMessage MailComposer object
+     * @param {Function} callback Callback function to run when the sending is completed
+     */
+    send(mail, done) {
+        // Sendmail strips this header line by itself
+        mail.message.keepBcc = true;
+
+        let envelope = mail.data.envelope || mail.message.getEnvelope();
+        let messageId = mail.message.messageId();
+
+        let recipients = [].concat(envelope.to || []);
+        if (recipients.length > 3) {
+            recipients.push('...and ' + recipients.splice(2).length + ' more');
+        }
+        this.logger.info(
+            {
+                tnx: 'send',
+                messageId
+            },
+            'Composing JSON structure of %s to <%s>',
+            messageId,
+            recipients.join(', ')
+        );
+
+        setImmediate(() => {
+            mail.normalize((err, data) => {
+                if (err) {
+                    this.logger.error(
+                        {
+                            err,
+                            tnx: 'send',
+                            messageId
+                        },
+                        'Failed building JSON structure for %s. %s',
+                        messageId,
+                        err.message
+                    );
+                    return done(err);
+                }
+
+                delete data.envelope;
+                delete data.normalizedHeaders;
+
+                return done(null, {
+                    envelope,
+                    messageId,
+                    message: this.options.skipEncoding ? data : JSON.stringify(data)
+                });
+            });
+        });
+    }
+}
+
+module.exports = JSONTransport;

backend/apis/nodejs/node_modules/nodemailer/lib/mail-composer/index.js

@@ -0,0 +1,565 @@
+/* eslint no-undefined: 0 */
+
+'use strict';
+
+const MimeNode = require('../mime-node');
+const mimeFuncs = require('../mime-funcs');
+const parseDataURI = require('../shared').parseDataURI;
+
+/**
+ * Creates the object for composing a MimeNode instance out from the mail options
+ *
+ * @constructor
+ * @param {Object} mail Mail options
+ */
+class MailComposer {
+    constructor(mail) {
+        this.mail = mail || {};
+        this.message = false;
+    }
+
+    /**
+     * Builds MimeNode instance
+     */
+    compile() {
+        this._alternatives = this.getAlternatives();
+        this._htmlNode = this._alternatives.filter(alternative => /^text\/html\b/i.test(alternative.contentType)).pop();
+        this._attachments = this.getAttachments(!!this._htmlNode);
+
+        this._useRelated = !!(this._htmlNode && this._attachments.related.length);
+        this._useAlternative = this._alternatives.length > 1;
+        this._useMixed = this._attachments.attached.length > 1 || (this._alternatives.length && this._attachments.attached.length === 1);
+
+        // Compose MIME tree
+        if (this.mail.raw) {
+            this.message = new MimeNode('message/rfc822', { newline: this.mail.newline }).setRaw(this.mail.raw);
+        } else if (this._useMixed) {
+            this.message = this._createMixed();
+        } else if (this._useAlternative) {
+            this.message = this._createAlternative();
+        } else if (this._useRelated) {
+            this.message = this._createRelated();
+        } else {
+            this.message = this._createContentNode(
+                false,
+                []
+                    .concat(this._alternatives || [])
+                    .concat(this._attachments.attached || [])
+                    .shift() || {
+                    contentType: 'text/plain',
+                    content: ''
+                }
+            );
+        }
+
+        // Add custom headers
+        if (this.mail.headers) {
+            this.message.addHeader(this.mail.headers);
+        }
+
+        // Add headers to the root node, always overrides custom headers
+        ['from', 'sender', 'to', 'cc', 'bcc', 'reply-to', 'in-reply-to', 'references', 'subject', 'message-id', 'date'].forEach(header => {
+            let key = header.replace(/-(\w)/g, (o, c) => c.toUpperCase());
+            if (this.mail[key]) {
+                this.message.setHeader(header, this.mail[key]);
+            }
+        });
+
+        // Sets custom envelope
+        if (this.mail.envelope) {
+            this.message.setEnvelope(this.mail.envelope);
+        }
+
+        // ensure Message-Id value
+        this.message.messageId();
+
+        return this.message;
+    }
+
+    /**
+     * List all attachments. Resulting attachment objects can be used as input for MimeNode nodes
+     *
+     * @param {Boolean} findRelated If true separate related attachments from attached ones
+     * @returns {Object} An object of arrays (`related` and `attached`)
+     */
+    getAttachments(findRelated) {
+        let icalEvent, eventObject;
+        let attachments = [].concat(this.mail.attachments || []).map((attachment, i) => {
+            let data;
+            let isMessageNode = /^message\//i.test(attachment.contentType);
+
+            if (/^data:/i.test(attachment.path || attachment.href)) {
+                attachment = this._processDataUrl(attachment);
+            }
+
+            let contentType = attachment.contentType || mimeFuncs.detectMimeType(attachment.filename || attachment.path || attachment.href || 'bin');
+            let isImage = /^image\//i.test(contentType);
+            let contentDisposition = attachment.contentDisposition || (isMessageNode || (isImage && attachment.cid) ? 'inline' : 'attachment');
+
+            data = {
+                contentType,
+                contentDisposition,
+                contentTransferEncoding: 'contentTransferEncoding' in attachment ? attachment.contentTransferEncoding : 'base64'
+            };
+
+            if (attachment.filename) {
+                data.filename = attachment.filename;
+            } else if (!isMessageNode && attachment.filename !== false) {
+                data.filename = (attachment.path || attachment.href || '').split('/').pop().split('?').shift() || 'attachment-' + (i + 1);
+                if (data.filename.indexOf('.') < 0) {
+                    data.filename += '.' + mimeFuncs.detectExtension(data.contentType);
+                }
+            }
+
+            if (/^https?:\/\//i.test(attachment.path)) {
+                attachment.href = attachment.path;
+                attachment.path = undefined;
+            }
+
+            if (attachment.cid) {
+                data.cid = attachment.cid;
+            }
+
+            if (attachment.raw) {
+                data.raw = attachment.raw;
+            } else if (attachment.path) {
+                data.content = {
+                    path: attachment.path
+                };
+            } else if (attachment.href) {
+                data.content = {
+                    href: attachment.href,
+                    httpHeaders: attachment.httpHeaders
+                };
+            } else {
+                data.content = attachment.content || '';
+            }
+
+            if (attachment.encoding) {
+                data.encoding = attachment.encoding;
+            }
+
+            if (attachment.headers) {
+                data.headers = attachment.headers;
+            }
+
+            return data;
+        });
+
+        if (this.mail.icalEvent) {
+            if (
+                typeof this.mail.icalEvent === 'object' &&
+                (this.mail.icalEvent.content || this.mail.icalEvent.path || this.mail.icalEvent.href || this.mail.icalEvent.raw)
+            ) {
+                icalEvent = this.mail.icalEvent;
+            } else {
+                icalEvent = {
+                    content: this.mail.icalEvent
+                };
+            }
+
+            eventObject = {};
+            Object.keys(icalEvent).forEach(key => {
+                eventObject[key] = icalEvent[key];
+            });
+
+            eventObject.contentType = 'application/ics';
+            if (!eventObject.headers) {
+                eventObject.headers = {};
+            }
+            eventObject.filename = eventObject.filename || 'invite.ics';
+            eventObject.headers['Content-Disposition'] = 'attachment';
+            eventObject.headers['Content-Transfer-Encoding'] = 'base64';
+        }
+
+        if (!findRelated) {
+            return {
+                attached: attachments.concat(eventObject || []),
+                related: []
+            };
+        } else {
+            return {
+                attached: attachments.filter(attachment => !attachment.cid).concat(eventObject || []),
+                related: attachments.filter(attachment => !!attachment.cid)
+            };
+        }
+    }
+
+    /**
+     * List alternatives. Resulting objects can be used as input for MimeNode nodes
+     *
+     * @returns {Array} An array of alternative elements. Includes the `text` and `html` values as well
+     */
+    getAlternatives() {
+        let alternatives = [],
+            text,
+            html,
+            watchHtml,
+            amp,
+            icalEvent,
+            eventObject;
+
+        if (this.mail.text) {
+            if (typeof this.mail.text === 'object' && (this.mail.text.content || this.mail.text.path || this.mail.text.href || this.mail.text.raw)) {
+                text = this.mail.text;
+            } else {
+                text = {
+                    content: this.mail.text
+                };
+            }
+            text.contentType = 'text/plain; charset=utf-8';
+        }
+
+        if (this.mail.watchHtml) {
+            if (
+                typeof this.mail.watchHtml === 'object' &&
+                (this.mail.watchHtml.content || this.mail.watchHtml.path || this.mail.watchHtml.href || this.mail.watchHtml.raw)
+            ) {
+                watchHtml = this.mail.watchHtml;
+            } else {
+                watchHtml = {
+                    content: this.mail.watchHtml
+                };
+            }
+            watchHtml.contentType = 'text/watch-html; charset=utf-8';
+        }
+
+        if (this.mail.amp) {
+            if (typeof this.mail.amp === 'object' && (this.mail.amp.content || this.mail.amp.path || this.mail.amp.href || this.mail.amp.raw)) {
+                amp = this.mail.amp;
+            } else {
+                amp = {
+                    content: this.mail.amp
+                };
+            }
+            amp.contentType = 'text/x-amp-html; charset=utf-8';
+        }
+
+        // NB! when including attachments with a calendar alternative you might end up in a blank screen on some clients
+        if (this.mail.icalEvent) {
+            if (
+                typeof this.mail.icalEvent === 'object' &&
+                (this.mail.icalEvent.content || this.mail.icalEvent.path || this.mail.icalEvent.href || this.mail.icalEvent.raw)
+            ) {
+                icalEvent = this.mail.icalEvent;
+            } else {
+                icalEvent = {
+                    content: this.mail.icalEvent
+                };
+            }
+
+            eventObject = {};
+            Object.keys(icalEvent).forEach(key => {
+                eventObject[key] = icalEvent[key];
+            });
+
+            if (eventObject.content && typeof eventObject.content === 'object') {
+                // we are going to have the same attachment twice, so mark this to be
+                // resolved just once
+                eventObject.content._resolve = true;
+            }
+
+            eventObject.filename = false;
+            eventObject.contentType = 'text/calendar; charset=utf-8; method=' + (eventObject.method || 'PUBLISH').toString().trim().toUpperCase();
+            if (!eventObject.headers) {
+                eventObject.headers = {};
+            }
+        }
+
+        if (this.mail.html) {
+            if (typeof this.mail.html === 'object' && (this.mail.html.content || this.mail.html.path || this.mail.html.href || this.mail.html.raw)) {
+                html = this.mail.html;
+            } else {
+                html = {
+                    content: this.mail.html
+                };
+            }
+            html.contentType = 'text/html; charset=utf-8';
+        }
+
+        []
+            .concat(text || [])
+            .concat(watchHtml || [])
+            .concat(amp || [])
+            .concat(html || [])
+            .concat(eventObject || [])
+            .concat(this.mail.alternatives || [])
+            .forEach(alternative => {
+                let data;
+
+                if (/^data:/i.test(alternative.path || alternative.href)) {
+                    alternative = this._processDataUrl(alternative);
+                }
+
+                data = {
+                    contentType: alternative.contentType || mimeFuncs.detectMimeType(alternative.filename || alternative.path || alternative.href || 'txt'),
+                    contentTransferEncoding: alternative.contentTransferEncoding
+                };
+
+                if (alternative.filename) {
+                    data.filename = alternative.filename;
+                }
+
+                if (/^https?:\/\//i.test(alternative.path)) {
+                    alternative.href = alternative.path;
+                    alternative.path = undefined;
+                }
+
+                if (alternative.raw) {
+                    data.raw = alternative.raw;
+                } else if (alternative.path) {
+                    data.content = {
+                        path: alternative.path
+                    };
+                } else if (alternative.href) {
+                    data.content = {
+                        href: alternative.href
+                    };
+                } else {
+                    data.content = alternative.content || '';
+                }
+
+                if (alternative.encoding) {
+                    data.encoding = alternative.encoding;
+                }
+
+                if (alternative.headers) {
+                    data.headers = alternative.headers;
+                }
+
+                alternatives.push(data);
+            });
+
+        return alternatives;
+    }
+
+    /**
+     * Builds multipart/mixed node. It should always contain different type of elements on the same level
+     * eg. text + attachments
+     *
+     * @param {Object} parentNode Parent for this note. If it does not exist, a root node is created
+     * @returns {Object} MimeNode node element
+     */
+    _createMixed(parentNode) {
+        let node;
+
+        if (!parentNode) {
+            node = new MimeNode('multipart/mixed', {
+                baseBoundary: this.mail.baseBoundary,
+                textEncoding: this.mail.textEncoding,
+                boundaryPrefix: this.mail.boundaryPrefix,
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        } else {
+            node = parentNode.createChild('multipart/mixed', {
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        }
+
+        if (this._useAlternative) {
+            this._createAlternative(node);
+        } else if (this._useRelated) {
+            this._createRelated(node);
+        }
+
+        []
+            .concat((!this._useAlternative && this._alternatives) || [])
+            .concat(this._attachments.attached || [])
+            .forEach(element => {
+                // if the element is a html node from related subpart then ignore it
+                if (!this._useRelated || element !== this._htmlNode) {
+                    this._createContentNode(node, element);
+                }
+            });
+
+        return node;
+    }
+
+    /**
+     * Builds multipart/alternative node. It should always contain same type of elements on the same level
+     * eg. text + html view of the same data
+     *
+     * @param {Object} parentNode Parent for this note. If it does not exist, a root node is created
+     * @returns {Object} MimeNode node element
+     */
+    _createAlternative(parentNode) {
+        let node;
+
+        if (!parentNode) {
+            node = new MimeNode('multipart/alternative', {
+                baseBoundary: this.mail.baseBoundary,
+                textEncoding: this.mail.textEncoding,
+                boundaryPrefix: this.mail.boundaryPrefix,
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        } else {
+            node = parentNode.createChild('multipart/alternative', {
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        }
+
+        this._alternatives.forEach(alternative => {
+            if (this._useRelated && this._htmlNode === alternative) {
+                this._createRelated(node);
+            } else {
+                this._createContentNode(node, alternative);
+            }
+        });
+
+        return node;
+    }
+
+    /**
+     * Builds multipart/related node. It should always contain html node with related attachments
+     *
+     * @param {Object} parentNode Parent for this note. If it does not exist, a root node is created
+     * @returns {Object} MimeNode node element
+     */
+    _createRelated(parentNode) {
+        let node;
+
+        if (!parentNode) {
+            node = new MimeNode('multipart/related; type="text/html"', {
+                baseBoundary: this.mail.baseBoundary,
+                textEncoding: this.mail.textEncoding,
+                boundaryPrefix: this.mail.boundaryPrefix,
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        } else {
+            node = parentNode.createChild('multipart/related; type="text/html"', {
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        }
+
+        this._createContentNode(node, this._htmlNode);
+
+        this._attachments.related.forEach(alternative => this._createContentNode(node, alternative));
+
+        return node;
+    }
+
+    /**
+     * Creates a regular node with contents
+     *
+     * @param {Object} parentNode Parent for this note. If it does not exist, a root node is created
+     * @param {Object} element Node data
+     * @returns {Object} MimeNode node element
+     */
+    _createContentNode(parentNode, element) {
+        element = element || {};
+        element.content = element.content || '';
+
+        let node;
+        let encoding = (element.encoding || 'utf8')
+            .toString()
+            .toLowerCase()
+            .replace(/[-_\s]/g, '');
+
+        if (!parentNode) {
+            node = new MimeNode(element.contentType, {
+                filename: element.filename,
+                baseBoundary: this.mail.baseBoundary,
+                textEncoding: this.mail.textEncoding,
+                boundaryPrefix: this.mail.boundaryPrefix,
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        } else {
+            node = parentNode.createChild(element.contentType, {
+                filename: element.filename,
+                textEncoding: this.mail.textEncoding,
+                disableUrlAccess: this.mail.disableUrlAccess,
+                disableFileAccess: this.mail.disableFileAccess,
+                normalizeHeaderKey: this.mail.normalizeHeaderKey,
+                newline: this.mail.newline
+            });
+        }
+
+        // add custom headers
+        if (element.headers) {
+            node.addHeader(element.headers);
+        }
+
+        if (element.cid) {
+            node.setHeader('Content-Id', '<' + element.cid.replace(/[<>]/g, '') + '>');
+        }
+
+        if (element.contentTransferEncoding) {
+            node.setHeader('Content-Transfer-Encoding', element.contentTransferEncoding);
+        } else if (this.mail.encoding && /^text\//i.test(element.contentType)) {
+            node.setHeader('Content-Transfer-Encoding', this.mail.encoding);
+        }
+
+        if (!/^text\//i.test(element.contentType) || element.contentDisposition) {
+            node.setHeader(
+                'Content-Disposition',
+                element.contentDisposition || (element.cid && /^image\//i.test(element.contentType) ? 'inline' : 'attachment')
+            );
+        }
+
+        if (typeof element.content === 'string' && !['utf8', 'usascii', 'ascii'].includes(encoding)) {
+            element.content = Buffer.from(element.content, encoding);
+        }
+
+        // prefer pregenerated raw content
+        if (element.raw) {
+            node.setRaw(element.raw);
+        } else {
+            node.setContent(element.content);
+        }
+
+        return node;
+    }
+
+    /**
+     * Parses data uri and converts it to a Buffer
+     *
+     * @param {Object} element Content element
+     * @return {Object} Parsed element
+     */
+    _processDataUrl(element) {
+        let parsedDataUri;
+        if ((element.path || element.href).match(/^data:/)) {
+            parsedDataUri = parseDataURI(element.path || element.href);
+        }
+
+        if (!parsedDataUri) {
+            return element;
+        }
+
+        element.content = parsedDataUri.data;
+        element.contentType = element.contentType || parsedDataUri.contentType;
+
+        if ('path' in element) {
+            element.path = false;
+        }
+
+        if ('href' in element) {
+            element.href = false;
+        }
+
+        return element;
+    }
+}
+
+module.exports = MailComposer;

backend/apis/nodejs/node_modules/nodemailer/lib/mailer/index.js

@@ -0,0 +1,429 @@
+'use strict';
+
+const EventEmitter = require('events');
+const shared = require('../shared');
+const mimeTypes = require('../mime-funcs/mime-types');
+const MailComposer = require('../mail-composer');
+const DKIM = require('../dkim');
+const httpProxyClient = require('../smtp-connection/http-proxy-client');
+const util = require('util');
+const urllib = require('url');
+const packageData = require('../../package.json');
+const MailMessage = require('./mail-message');
+const net = require('net');
+const dns = require('dns');
+const crypto = require('crypto');
+
+/**
+ * Creates an object for exposing the Mail API
+ *
+ * @constructor
+ * @param {Object} transporter Transport object instance to pass the mails to
+ */
+class Mail extends EventEmitter {
+    constructor(transporter, options, defaults) {
+        super();
+
+        this.options = options || {};
+        this._defaults = defaults || {};
+
+        this._defaultPlugins = {
+            compile: [(...args) => this._convertDataImages(...args)],
+            stream: []
+        };
+
+        this._userPlugins = {
+            compile: [],
+            stream: []
+        };
+
+        this.meta = new Map();
+
+        this.dkim = this.options.dkim ? new DKIM(this.options.dkim) : false;
+
+        this.transporter = transporter;
+        this.transporter.mailer = this;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'mail'
+        });
+
+        this.logger.debug(
+            {
+                tnx: 'create'
+            },
+            'Creating transport: %s',
+            this.getVersionString()
+        );
+
+        // setup emit handlers for the transporter
+        if (typeof this.transporter.on === 'function') {
+            // deprecated log interface
+            this.transporter.on('log', log => {
+                this.logger.debug(
+                    {
+                        tnx: 'transport'
+                    },
+                    '%s: %s',
+                    log.type,
+                    log.message
+                );
+            });
+
+            // transporter errors
+            this.transporter.on('error', err => {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'transport'
+                    },
+                    'Transport Error: %s',
+                    err.message
+                );
+                this.emit('error', err);
+            });
+
+            // indicates if the sender has became idle
+            this.transporter.on('idle', (...args) => {
+                this.emit('idle', ...args);
+            });
+        }
+
+        /**
+         * Optional methods passed to the underlying transport object
+         */
+        ['close', 'isIdle', 'verify'].forEach(method => {
+            this[method] = (...args) => {
+                if (typeof this.transporter[method] === 'function') {
+                    if (method === 'verify' && typeof this.getSocket === 'function') {
+                        this.transporter.getSocket = this.getSocket;
+                        this.getSocket = false;
+                    }
+                    return this.transporter[method](...args);
+                } else {
+                    this.logger.warn(
+                        {
+                            tnx: 'transport',
+                            methodName: method
+                        },
+                        'Non existing method %s called for transport',
+                        method
+                    );
+                    return false;
+                }
+            };
+        });
+
+        // setup proxy handling
+        if (this.options.proxy && typeof this.options.proxy === 'string') {
+            this.setupProxy(this.options.proxy);
+        }
+    }
+
+    use(step, plugin) {
+        step = (step || '').toString();
+        if (!this._userPlugins.hasOwnProperty(step)) {
+            this._userPlugins[step] = [plugin];
+        } else {
+            this._userPlugins[step].push(plugin);
+        }
+
+        return this;
+    }
+
+    /**
+     * Sends an email using the preselected transport object
+     *
+     * @param {Object} data E-data description
+     * @param {Function?} callback Callback to run once the sending succeeded or failed
+     */
+    sendMail(data, callback = null) {
+        let promise;
+
+        if (!callback) {
+            promise = new Promise((resolve, reject) => {
+                callback = shared.callbackPromise(resolve, reject);
+            });
+        }
+
+        if (typeof this.getSocket === 'function') {
+            this.transporter.getSocket = this.getSocket;
+            this.getSocket = false;
+        }
+
+        let mail = new MailMessage(this, data);
+
+        this.logger.debug(
+            {
+                tnx: 'transport',
+                name: this.transporter.name,
+                version: this.transporter.version,
+                action: 'send'
+            },
+            'Sending mail using %s/%s',
+            this.transporter.name,
+            this.transporter.version
+        );
+
+        this._processPlugins('compile', mail, err => {
+            if (err) {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'plugin',
+                        action: 'compile'
+                    },
+                    'PluginCompile Error: %s',
+                    err.message
+                );
+                return callback(err);
+            }
+
+            mail.message = new MailComposer(mail.data).compile();
+
+            mail.setMailerHeader();
+            mail.setPriorityHeaders();
+            mail.setListHeaders();
+
+            this._processPlugins('stream', mail, err => {
+                if (err) {
+                    this.logger.error(
+                        {
+                            err,
+                            tnx: 'plugin',
+                            action: 'stream'
+                        },
+                        'PluginStream Error: %s',
+                        err.message
+                    );
+                    return callback(err);
+                }
+
+                if (mail.data.dkim || this.dkim) {
+                    mail.message.processFunc(input => {
+                        let dkim = mail.data.dkim ? new DKIM(mail.data.dkim) : this.dkim;
+                        this.logger.debug(
+                            {
+                                tnx: 'DKIM',
+                                messageId: mail.message.messageId(),
+                                dkimDomains: dkim.keys.map(key => key.keySelector + '.' + key.domainName).join(', ')
+                            },
+                            'Signing outgoing message with %s keys',
+                            dkim.keys.length
+                        );
+                        return dkim.sign(input, mail.data._dkim);
+                    });
+                }
+
+                this.transporter.send(mail, (...args) => {
+                    if (args[0]) {
+                        this.logger.error(
+                            {
+                                err: args[0],
+                                tnx: 'transport',
+                                action: 'send'
+                            },
+                            'Send Error: %s',
+                            args[0].message
+                        );
+                    }
+                    callback(...args);
+                });
+            });
+        });
+
+        return promise;
+    }
+
+    getVersionString() {
+        return util.format('%s (%s; +%s; %s/%s)', packageData.name, packageData.version, packageData.homepage, this.transporter.name, this.transporter.version);
+    }
+
+    _processPlugins(step, mail, callback) {
+        step = (step || '').toString();
+
+        if (!this._userPlugins.hasOwnProperty(step)) {
+            return callback();
+        }
+
+        let userPlugins = this._userPlugins[step] || [];
+        let defaultPlugins = this._defaultPlugins[step] || [];
+
+        if (userPlugins.length) {
+            this.logger.debug(
+                {
+                    tnx: 'transaction',
+                    pluginCount: userPlugins.length,
+                    step
+                },
+                'Using %s plugins for %s',
+                userPlugins.length,
+                step
+            );
+        }
+
+        if (userPlugins.length + defaultPlugins.length === 0) {
+            return callback();
+        }
+
+        let pos = 0;
+        let block = 'default';
+        let processPlugins = () => {
+            let curplugins = block === 'default' ? defaultPlugins : userPlugins;
+            if (pos >= curplugins.length) {
+                if (block === 'default' && userPlugins.length) {
+                    block = 'user';
+                    pos = 0;
+                    curplugins = userPlugins;
+                } else {
+                    return callback();
+                }
+            }
+            let plugin = curplugins[pos++];
+            plugin(mail, err => {
+                if (err) {
+                    return callback(err);
+                }
+                processPlugins();
+            });
+        };
+
+        processPlugins();
+    }
+
+    /**
+     * Sets up proxy handler for a Nodemailer object
+     *
+     * @param {String} proxyUrl Proxy configuration url
+     */
+    setupProxy(proxyUrl) {
+        let proxy = urllib.parse(proxyUrl);
+
+        // setup socket handler for the mailer object
+        this.getSocket = (options, callback) => {
+            let protocol = proxy.protocol.replace(/:$/, '').toLowerCase();
+
+            if (this.meta.has('proxy_handler_' + protocol)) {
+                return this.meta.get('proxy_handler_' + protocol)(proxy, options, callback);
+            }
+
+            switch (protocol) {
+                // Connect using a HTTP CONNECT method
+                case 'http':
+                case 'https':
+                    httpProxyClient(proxy.href, options.port, options.host, (err, socket) => {
+                        if (err) {
+                            return callback(err);
+                        }
+                        return callback(null, {
+                            connection: socket
+                        });
+                    });
+                    return;
+                case 'socks':
+                case 'socks5':
+                case 'socks4':
+                case 'socks4a': {
+                    if (!this.meta.has('proxy_socks_module')) {
+                        return callback(new Error('Socks module not loaded'));
+                    }
+                    let connect = ipaddress => {
+                        let proxyV2 = !!this.meta.get('proxy_socks_module').SocksClient;
+                        let socksClient = proxyV2 ? this.meta.get('proxy_socks_module').SocksClient : this.meta.get('proxy_socks_module');
+                        let proxyType = Number(proxy.protocol.replace(/\D/g, '')) || 5;
+                        let connectionOpts = {
+                            proxy: {
+                                ipaddress,
+                                port: Number(proxy.port),
+                                type: proxyType
+                            },
+                            [proxyV2 ? 'destination' : 'target']: {
+                                host: options.host,
+                                port: options.port
+                            },
+                            command: 'connect'
+                        };
+
+                        if (proxy.auth) {
+                            let username = decodeURIComponent(proxy.auth.split(':').shift());
+                            let password = decodeURIComponent(proxy.auth.split(':').pop());
+                            if (proxyV2) {
+                                connectionOpts.proxy.userId = username;
+                                connectionOpts.proxy.password = password;
+                            } else if (proxyType === 4) {
+                                connectionOpts.userid = username;
+                            } else {
+                                connectionOpts.authentication = {
+                                    username,
+                                    password
+                                };
+                            }
+                        }
+
+                        socksClient.createConnection(connectionOpts, (err, info) => {
+                            if (err) {
+                                return callback(err);
+                            }
+                            return callback(null, {
+                                connection: info.socket || info
+                            });
+                        });
+                    };
+
+                    if (net.isIP(proxy.hostname)) {
+                        return connect(proxy.hostname);
+                    }
+
+                    return dns.resolve(proxy.hostname, (err, address) => {
+                        if (err) {
+                            return callback(err);
+                        }
+                        connect(Array.isArray(address) ? address[0] : address);
+                    });
+                }
+            }
+            callback(new Error('Unknown proxy configuration'));
+        };
+    }
+
+    _convertDataImages(mail, callback) {
+        if ((!this.options.attachDataUrls && !mail.data.attachDataUrls) || !mail.data.html) {
+            return callback();
+        }
+        mail.resolveContent(mail.data, 'html', (err, html) => {
+            if (err) {
+                return callback(err);
+            }
+            let cidCounter = 0;
+            html = (html || '')
+                .toString()
+                .replace(/(<img\b[^<>]{0,1024} src\s{0,20}=[\s"']{0,20})(data:([^;]+);[^"'>\s]+)/gi, (match, prefix, dataUri, mimeType) => {
+                    let cid = crypto.randomBytes(10).toString('hex') + '@localhost';
+                    if (!mail.data.attachments) {
+                        mail.data.attachments = [];
+                    }
+                    if (!Array.isArray(mail.data.attachments)) {
+                        mail.data.attachments = [].concat(mail.data.attachments || []);
+                    }
+                    mail.data.attachments.push({
+                        path: dataUri,
+                        cid,
+                        filename: 'image-' + ++cidCounter + '.' + mimeTypes.detectExtension(mimeType)
+                    });
+                    return prefix + 'cid:' + cid;
+                });
+            mail.data.html = html;
+            callback();
+        });
+    }
+
+    set(key, value) {
+        return this.meta.set(key, value);
+    }
+
+    get(key) {
+        return this.meta.get(key);
+    }
+}
+
+module.exports = Mail;

backend/apis/nodejs/node_modules/nodemailer/lib/mailer/mail-message.js

@@ -0,0 +1,315 @@
+'use strict';
+
+const shared = require('../shared');
+const MimeNode = require('../mime-node');
+const mimeFuncs = require('../mime-funcs');
+
+class MailMessage {
+    constructor(mailer, data) {
+        this.mailer = mailer;
+        this.data = {};
+        this.message = null;
+
+        data = data || {};
+        let options = mailer.options || {};
+        let defaults = mailer._defaults || {};
+
+        Object.keys(data).forEach(key => {
+            this.data[key] = data[key];
+        });
+
+        this.data.headers = this.data.headers || {};
+
+        // apply defaults
+        Object.keys(defaults).forEach(key => {
+            if (!(key in this.data)) {
+                this.data[key] = defaults[key];
+            } else if (key === 'headers') {
+                // headers is a special case. Allow setting individual default headers
+                Object.keys(defaults.headers).forEach(key => {
+                    if (!(key in this.data.headers)) {
+                        this.data.headers[key] = defaults.headers[key];
+                    }
+                });
+            }
+        });
+
+        // force specific keys from transporter options
+        ['disableFileAccess', 'disableUrlAccess', 'normalizeHeaderKey'].forEach(key => {
+            if (key in options) {
+                this.data[key] = options[key];
+            }
+        });
+    }
+
+    resolveContent(...args) {
+        return shared.resolveContent(...args);
+    }
+
+    resolveAll(callback) {
+        let keys = [
+            [this.data, 'html'],
+            [this.data, 'text'],
+            [this.data, 'watchHtml'],
+            [this.data, 'amp'],
+            [this.data, 'icalEvent']
+        ];
+
+        if (this.data.alternatives && this.data.alternatives.length) {
+            this.data.alternatives.forEach((alternative, i) => {
+                keys.push([this.data.alternatives, i]);
+            });
+        }
+
+        if (this.data.attachments && this.data.attachments.length) {
+            this.data.attachments.forEach((attachment, i) => {
+                if (!attachment.filename) {
+                    attachment.filename = (attachment.path || attachment.href || '').split('/').pop().split('?').shift() || 'attachment-' + (i + 1);
+                    if (attachment.filename.indexOf('.') < 0) {
+                        attachment.filename += '.' + mimeFuncs.detectExtension(attachment.contentType);
+                    }
+                }
+
+                if (!attachment.contentType) {
+                    attachment.contentType = mimeFuncs.detectMimeType(attachment.filename || attachment.path || attachment.href || 'bin');
+                }
+
+                keys.push([this.data.attachments, i]);
+            });
+        }
+
+        let mimeNode = new MimeNode();
+
+        let addressKeys = ['from', 'to', 'cc', 'bcc', 'sender', 'replyTo'];
+
+        addressKeys.forEach(address => {
+            let value;
+            if (this.message) {
+                value = [].concat(mimeNode._parseAddresses(this.message.getHeader(address === 'replyTo' ? 'reply-to' : address)) || []);
+            } else if (this.data[address]) {
+                value = [].concat(mimeNode._parseAddresses(this.data[address]) || []);
+            }
+            if (value && value.length) {
+                this.data[address] = value;
+            } else if (address in this.data) {
+                this.data[address] = null;
+            }
+        });
+
+        let singleKeys = ['from', 'sender'];
+        singleKeys.forEach(address => {
+            if (this.data[address]) {
+                this.data[address] = this.data[address].shift();
+            }
+        });
+
+        let pos = 0;
+        let resolveNext = () => {
+            if (pos >= keys.length) {
+                return callback(null, this.data);
+            }
+            let args = keys[pos++];
+            if (!args[0] || !args[0][args[1]]) {
+                return resolveNext();
+            }
+            shared.resolveContent(...args, (err, value) => {
+                if (err) {
+                    return callback(err);
+                }
+
+                let node = {
+                    content: value
+                };
+                if (args[0][args[1]] && typeof args[0][args[1]] === 'object' && !Buffer.isBuffer(args[0][args[1]])) {
+                    Object.keys(args[0][args[1]]).forEach(key => {
+                        if (!(key in node) && !['content', 'path', 'href', 'raw'].includes(key)) {
+                            node[key] = args[0][args[1]][key];
+                        }
+                    });
+                }
+
+                args[0][args[1]] = node;
+                resolveNext();
+            });
+        };
+
+        setImmediate(() => resolveNext());
+    }
+
+    normalize(callback) {
+        let envelope = this.data.envelope || this.message.getEnvelope();
+        let messageId = this.message.messageId();
+
+        this.resolveAll((err, data) => {
+            if (err) {
+                return callback(err);
+            }
+
+            data.envelope = envelope;
+            data.messageId = messageId;
+
+            ['html', 'text', 'watchHtml', 'amp'].forEach(key => {
+                if (data[key] && data[key].content) {
+                    if (typeof data[key].content === 'string') {
+                        data[key] = data[key].content;
+                    } else if (Buffer.isBuffer(data[key].content)) {
+                        data[key] = data[key].content.toString();
+                    }
+                }
+            });
+
+            if (data.icalEvent && Buffer.isBuffer(data.icalEvent.content)) {
+                data.icalEvent.content = data.icalEvent.content.toString('base64');
+                data.icalEvent.encoding = 'base64';
+            }
+
+            if (data.alternatives && data.alternatives.length) {
+                data.alternatives.forEach(alternative => {
+                    if (alternative && alternative.content && Buffer.isBuffer(alternative.content)) {
+                        alternative.content = alternative.content.toString('base64');
+                        alternative.encoding = 'base64';
+                    }
+                });
+            }
+
+            if (data.attachments && data.attachments.length) {
+                data.attachments.forEach(attachment => {
+                    if (attachment && attachment.content && Buffer.isBuffer(attachment.content)) {
+                        attachment.content = attachment.content.toString('base64');
+                        attachment.encoding = 'base64';
+                    }
+                });
+            }
+
+            data.normalizedHeaders = {};
+            Object.keys(data.headers || {}).forEach(key => {
+                let value = [].concat(data.headers[key] || []).shift();
+                value = (value && value.value) || value;
+                if (value) {
+                    if (['references', 'in-reply-to', 'message-id', 'content-id'].includes(key)) {
+                        value = this.message._encodeHeaderValue(key, value);
+                    }
+                    data.normalizedHeaders[key] = value;
+                }
+            });
+
+            if (data.list && typeof data.list === 'object') {
+                let listHeaders = this._getListHeaders(data.list);
+                listHeaders.forEach(entry => {
+                    data.normalizedHeaders[entry.key] = entry.value.map(val => (val && val.value) || val).join(', ');
+                });
+            }
+
+            if (data.references) {
+                data.normalizedHeaders.references = this.message._encodeHeaderValue('references', data.references);
+            }
+
+            if (data.inReplyTo) {
+                data.normalizedHeaders['in-reply-to'] = this.message._encodeHeaderValue('in-reply-to', data.inReplyTo);
+            }
+
+            return callback(null, data);
+        });
+    }
+
+    setMailerHeader() {
+        if (!this.message || !this.data.xMailer) {
+            return;
+        }
+        this.message.setHeader('X-Mailer', this.data.xMailer);
+    }
+
+    setPriorityHeaders() {
+        if (!this.message || !this.data.priority) {
+            return;
+        }
+        switch ((this.data.priority || '').toString().toLowerCase()) {
+            case 'high':
+                this.message.setHeader('X-Priority', '1 (Highest)');
+                this.message.setHeader('X-MSMail-Priority', 'High');
+                this.message.setHeader('Importance', 'High');
+                break;
+            case 'low':
+                this.message.setHeader('X-Priority', '5 (Lowest)');
+                this.message.setHeader('X-MSMail-Priority', 'Low');
+                this.message.setHeader('Importance', 'Low');
+                break;
+            default:
+            // do not add anything, since all messages are 'Normal' by default
+        }
+    }
+
+    setListHeaders() {
+        if (!this.message || !this.data.list || typeof this.data.list !== 'object') {
+            return;
+        }
+        // add optional List-* headers
+        if (this.data.list && typeof this.data.list === 'object') {
+            this._getListHeaders(this.data.list).forEach(listHeader => {
+                listHeader.value.forEach(value => {
+                    this.message.addHeader(listHeader.key, value);
+                });
+            });
+        }
+    }
+
+    _getListHeaders(listData) {
+        // make sure an url looks like <protocol:url>
+        return Object.keys(listData).map(key => ({
+            key: 'list-' + key.toLowerCase().trim(),
+            value: [].concat(listData[key] || []).map(value => ({
+                prepared: true,
+                foldLines: true,
+                value: []
+                    .concat(value || [])
+                    .map(value => {
+                        if (typeof value === 'string') {
+                            value = {
+                                url: value
+                            };
+                        }
+
+                        if (value && value.url) {
+                            if (key.toLowerCase().trim() === 'id') {
+                                // List-ID: "comment" <domain>
+                                let comment = value.comment || '';
+                                if (mimeFuncs.isPlainText(comment)) {
+                                    comment = '"' + comment + '"';
+                                } else {
+                                    comment = mimeFuncs.encodeWord(comment);
+                                }
+
+                                return (value.comment ? comment + ' ' : '') + this._formatListUrl(value.url).replace(/^<[^:]+\/{,2}/, '');
+                            }
+
+                            // List-*: <http://domain> (comment)
+                            let comment = value.comment || '';
+                            if (!mimeFuncs.isPlainText(comment)) {
+                                comment = mimeFuncs.encodeWord(comment);
+                            }
+
+                            return this._formatListUrl(value.url) + (value.comment ? ' (' + comment + ')' : '');
+                        }
+
+                        return '';
+                    })
+                    .filter(value => value)
+                    .join(', ')
+            }))
+        }));
+    }
+
+    _formatListUrl(url) {
+        url = url.replace(/[\s<]+|[\s>]+/g, '');
+        if (/^(https?|mailto|ftp):/.test(url)) {
+            return '<' + url + '>';
+        }
+        if (/^[^@]+@[^@]+$/.test(url)) {
+            return '<mailto:' + url + '>';
+        }
+
+        return '<http://' + url + '>';
+    }
+}
+
+module.exports = MailMessage;

backend/apis/nodejs/node_modules/nodemailer/lib/mime-funcs/index.js

@@ -0,0 +1,625 @@
+/* eslint no-control-regex:0 */
+
+'use strict';
+
+const base64 = require('../base64');
+const qp = require('../qp');
+const mimeTypes = require('./mime-types');
+
+module.exports = {
+    /**
+     * Checks if a value is plaintext string (uses only printable 7bit chars)
+     *
+     * @param {String} value String to be tested
+     * @returns {Boolean} true if it is a plaintext string
+     */
+    isPlainText(value, isParam) {
+        const re = isParam ? /[\x00-\x08\x0b\x0c\x0e-\x1f"\u0080-\uFFFF]/ : /[\x00-\x08\x0b\x0c\x0e-\x1f\u0080-\uFFFF]/;
+        if (typeof value !== 'string' || re.test(value)) {
+            return false;
+        } else {
+            return true;
+        }
+    },
+
+    /**
+     * Checks if a multi line string containes lines longer than the selected value.
+     *
+     * Useful when detecting if a mail message needs any processing at all –
+     * if only plaintext characters are used and lines are short, then there is
+     * no need to encode the values in any way. If the value is plaintext but has
+     * longer lines then allowed, then use format=flowed
+     *
+     * @param {Number} lineLength Max line length to check for
+     * @returns {Boolean} Returns true if there is at least one line longer than lineLength chars
+     */
+    hasLongerLines(str, lineLength) {
+        if (str.length > 128 * 1024) {
+            // do not test strings longer than 128kB
+            return true;
+        }
+        return new RegExp('^.{' + (lineLength + 1) + ',}', 'm').test(str);
+    },
+
+    /**
+     * Encodes a string or an Buffer to an UTF-8 MIME Word (rfc2047)
+     *
+     * @param {String|Buffer} data String to be encoded
+     * @param {String} mimeWordEncoding='Q' Encoding for the mime word, either Q or B
+     * @param {Number} [maxLength=0] If set, split mime words into several chunks if needed
+     * @return {String} Single or several mime words joined together
+     */
+    encodeWord(data, mimeWordEncoding, maxLength) {
+        mimeWordEncoding = (mimeWordEncoding || 'Q').toString().toUpperCase().trim().charAt(0);
+        maxLength = maxLength || 0;
+
+        let encodedStr;
+        let toCharset = 'UTF-8';
+
+        if (maxLength && maxLength > 7 + toCharset.length) {
+            maxLength -= 7 + toCharset.length;
+        }
+
+        if (mimeWordEncoding === 'Q') {
+            // https://tools.ietf.org/html/rfc2047#section-5 rule (3)
+            encodedStr = qp.encode(data).replace(/[^a-z0-9!*+\-/=]/gi, chr => {
+                let ord = chr.charCodeAt(0).toString(16).toUpperCase();
+                if (chr === ' ') {
+                    return '_';
+                } else {
+                    return '=' + (ord.length === 1 ? '0' + ord : ord);
+                }
+            });
+        } else if (mimeWordEncoding === 'B') {
+            encodedStr = typeof data === 'string' ? data : base64.encode(data);
+            maxLength = maxLength ? Math.max(3, ((maxLength - (maxLength % 4)) / 4) * 3) : 0;
+        }
+
+        if (maxLength && (mimeWordEncoding !== 'B' ? encodedStr : base64.encode(data)).length > maxLength) {
+            if (mimeWordEncoding === 'Q') {
+                encodedStr = this.splitMimeEncodedString(encodedStr, maxLength).join('?= =?' + toCharset + '?' + mimeWordEncoding + '?');
+            } else {
+                // RFC2047 6.3 (2) states that encoded-word must include an integral number of characters, so no chopping unicode sequences
+                let parts = [];
+                let lpart = '';
+                for (let i = 0, len = encodedStr.length; i < len; i++) {
+                    let chr = encodedStr.charAt(i);
+
+                    if (/[\ud83c\ud83d\ud83e]/.test(chr) && i < len - 1) {
+                        // composite emoji byte, so add the next byte as well
+                        chr += encodedStr.charAt(++i);
+                    }
+
+                    // check if we can add this character to the existing string
+                    // without breaking byte length limit
+                    if (Buffer.byteLength(lpart + chr) <= maxLength || i === 0) {
+                        lpart += chr;
+                    } else {
+                        // we hit the length limit, so push the existing string and start over
+                        parts.push(base64.encode(lpart));
+                        lpart = chr;
+                    }
+                }
+                if (lpart) {
+                    parts.push(base64.encode(lpart));
+                }
+
+                if (parts.length > 1) {
+                    encodedStr = parts.join('?= =?' + toCharset + '?' + mimeWordEncoding + '?');
+                } else {
+                    encodedStr = parts.join('');
+                }
+            }
+        } else if (mimeWordEncoding === 'B') {
+            encodedStr = base64.encode(data);
+        }
+
+        return '=?' + toCharset + '?' + mimeWordEncoding + '?' + encodedStr + (encodedStr.substr(-2) === '?=' ? '' : '?=');
+    },
+
+    /**
+     * Finds word sequences with non ascii text and converts these to mime words
+     *
+     * @param {String} value String to be encoded
+     * @param {String} mimeWordEncoding='Q' Encoding for the mime word, either Q or B
+     * @param {Number} [maxLength=0] If set, split mime words into several chunks if needed
+     * @param {Boolean} [encodeAll=false] If true and the value needs encoding then encodes entire string, not just the smallest match
+     * @return {String} String with possible mime words
+     */
+    encodeWords(value, mimeWordEncoding, maxLength, encodeAll) {
+        maxLength = maxLength || 0;
+
+        let encodedValue;
+
+        // find first word with a non-printable ascii or special symbol in it
+        let firstMatch = value.match(/(?:^|\s)([^\s]*["\u0080-\uFFFF])/);
+        if (!firstMatch) {
+            return value;
+        }
+
+        if (encodeAll) {
+            // if it is requested to encode everything or the string contains something that resebles encoded word, then encode everything
+
+            return this.encodeWord(value, mimeWordEncoding, maxLength);
+        }
+
+        // find the last word with a non-printable ascii in it
+        let lastMatch = value.match(/(["\u0080-\uFFFF][^\s]*)[^"\u0080-\uFFFF]*$/);
+        if (!lastMatch) {
+            // should not happen
+            return value;
+        }
+
+        let startIndex =
+            firstMatch.index +
+            (
+                firstMatch[0].match(/[^\s]/) || {
+                    index: 0
+                }
+            ).index;
+        let endIndex = lastMatch.index + (lastMatch[1] || '').length;
+
+        encodedValue =
+            (startIndex ? value.substr(0, startIndex) : '') +
+            this.encodeWord(value.substring(startIndex, endIndex), mimeWordEncoding || 'Q', maxLength) +
+            (endIndex < value.length ? value.substr(endIndex) : '');
+
+        return encodedValue;
+    },
+
+    /**
+     * Joins parsed header value together as 'value; param1=value1; param2=value2'
+     * PS: We are following RFC 822 for the list of special characters that we need to keep in quotes.
+     *      Refer: https://www.w3.org/Protocols/rfc1341/4_Content-Type.html
+     * @param {Object} structured Parsed header value
+     * @return {String} joined header value
+     */
+    buildHeaderValue(structured) {
+        let paramsArray = [];
+
+        Object.keys(structured.params || {}).forEach(param => {
+            // filename might include unicode characters so it is a special case
+            // other values probably do not
+            let value = structured.params[param];
+            if (!this.isPlainText(value, true) || value.length >= 75) {
+                this.buildHeaderParam(param, value, 50).forEach(encodedParam => {
+                    if (!/[\s"\\;:/=(),<>@[\]?]|^[-']|'$/.test(encodedParam.value) || encodedParam.key.substr(-1) === '*') {
+                        paramsArray.push(encodedParam.key + '=' + encodedParam.value);
+                    } else {
+                        paramsArray.push(encodedParam.key + '=' + JSON.stringify(encodedParam.value));
+                    }
+                });
+            } else if (/[\s'"\\;:/=(),<>@[\]?]|^-/.test(value)) {
+                paramsArray.push(param + '=' + JSON.stringify(value));
+            } else {
+                paramsArray.push(param + '=' + value);
+            }
+        });
+
+        return structured.value + (paramsArray.length ? '; ' + paramsArray.join('; ') : '');
+    },
+
+    /**
+     * Encodes a string or an Buffer to an UTF-8 Parameter Value Continuation encoding (rfc2231)
+     * Useful for splitting long parameter values.
+     *
+     * For example
+     *      title="unicode string"
+     * becomes
+     *     title*0*=utf-8''unicode
+     *     title*1*=%20string
+     *
+     * @param {String|Buffer} data String to be encoded
+     * @param {Number} [maxLength=50] Max length for generated chunks
+     * @param {String} [fromCharset='UTF-8'] Source sharacter set
+     * @return {Array} A list of encoded keys and headers
+     */
+    buildHeaderParam(key, data, maxLength) {
+        let list = [];
+        let encodedStr = typeof data === 'string' ? data : (data || '').toString();
+        let encodedStrArr;
+        let chr, ord;
+        let line;
+        let startPos = 0;
+        let i, len;
+
+        maxLength = maxLength || 50;
+
+        // process ascii only text
+        if (this.isPlainText(data, true)) {
+            // check if conversion is even needed
+            if (encodedStr.length <= maxLength) {
+                return [
+                    {
+                        key,
+                        value: encodedStr
+                    }
+                ];
+            }
+
+            encodedStr = encodedStr.replace(new RegExp('.{' + maxLength + '}', 'g'), str => {
+                list.push({
+                    line: str
+                });
+                return '';
+            });
+
+            if (encodedStr) {
+                list.push({
+                    line: encodedStr
+                });
+            }
+        } else {
+            if (/[\uD800-\uDBFF]/.test(encodedStr)) {
+                // string containts surrogate pairs, so normalize it to an array of bytes
+                encodedStrArr = [];
+                for (i = 0, len = encodedStr.length; i < len; i++) {
+                    chr = encodedStr.charAt(i);
+                    ord = chr.charCodeAt(0);
+                    if (ord >= 0xd800 && ord <= 0xdbff && i < len - 1) {
+                        chr += encodedStr.charAt(i + 1);
+                        encodedStrArr.push(chr);
+                        i++;
+                    } else {
+                        encodedStrArr.push(chr);
+                    }
+                }
+                encodedStr = encodedStrArr;
+            }
+
+            // first line includes the charset and language info and needs to be encoded
+            // even if it does not contain any unicode characters
+            line = 'utf-8\x27\x27';
+            let encoded = true;
+            startPos = 0;
+
+            // process text with unicode or special chars
+            for (i = 0, len = encodedStr.length; i < len; i++) {
+                chr = encodedStr[i];
+
+                if (encoded) {
+                    chr = this.safeEncodeURIComponent(chr);
+                } else {
+                    // try to urlencode current char
+                    chr = chr === ' ' ? chr : this.safeEncodeURIComponent(chr);
+                    // By default it is not required to encode a line, the need
+                    // only appears when the string contains unicode or special chars
+                    // in this case we start processing the line over and encode all chars
+                    if (chr !== encodedStr[i]) {
+                        // Check if it is even possible to add the encoded char to the line
+                        // If not, there is no reason to use this line, just push it to the list
+                        // and start a new line with the char that needs encoding
+                        if ((this.safeEncodeURIComponent(line) + chr).length >= maxLength) {
+                            list.push({
+                                line,
+                                encoded
+                            });
+                            line = '';
+                            startPos = i - 1;
+                        } else {
+                            encoded = true;
+                            i = startPos;
+                            line = '';
+                            continue;
+                        }
+                    }
+                }
+
+                // if the line is already too long, push it to the list and start a new one
+                if ((line + chr).length >= maxLength) {
+                    list.push({
+                        line,
+                        encoded
+                    });
+                    line = chr = encodedStr[i] === ' ' ? ' ' : this.safeEncodeURIComponent(encodedStr[i]);
+                    if (chr === encodedStr[i]) {
+                        encoded = false;
+                        startPos = i - 1;
+                    } else {
+                        encoded = true;
+                    }
+                } else {
+                    line += chr;
+                }
+            }
+
+            if (line) {
+                list.push({
+                    line,
+                    encoded
+                });
+            }
+        }
+
+        return list.map((item, i) => ({
+            // encoded lines: {name}*{part}*
+            // unencoded lines: {name}*{part}
+            // if any line needs to be encoded then the first line (part==0) is always encoded
+            key: key + '*' + i + (item.encoded ? '*' : ''),
+            value: item.line
+        }));
+    },
+
+    /**
+     * Parses a header value with key=value arguments into a structured
+     * object.
+     *
+     *   parseHeaderValue('content-type: text/plain; CHARSET='UTF-8'') ->
+     *   {
+     *     'value': 'text/plain',
+     *     'params': {
+     *       'charset': 'UTF-8'
+     *     }
+     *   }
+     *
+     * @param {String} str Header value
+     * @return {Object} Header value as a parsed structure
+     */
+    parseHeaderValue(str) {
+        let response = {
+            value: false,
+            params: {}
+        };
+        let key = false;
+        let value = '';
+        let type = 'value';
+        let quote = false;
+        let escaped = false;
+        let chr;
+
+        for (let i = 0, len = str.length; i < len; i++) {
+            chr = str.charAt(i);
+            if (type === 'key') {
+                if (chr === '=') {
+                    key = value.trim().toLowerCase();
+                    type = 'value';
+                    value = '';
+                    continue;
+                }
+                value += chr;
+            } else {
+                if (escaped) {
+                    value += chr;
+                } else if (chr === '\\') {
+                    escaped = true;
+                    continue;
+                } else if (quote && chr === quote) {
+                    quote = false;
+                } else if (!quote && chr === '"') {
+                    quote = chr;
+                } else if (!quote && chr === ';') {
+                    if (key === false) {
+                        response.value = value.trim();
+                    } else {
+                        response.params[key] = value.trim();
+                    }
+                    type = 'key';
+                    value = '';
+                } else {
+                    value += chr;
+                }
+                escaped = false;
+            }
+        }
+
+        if (type === 'value') {
+            if (key === false) {
+                response.value = value.trim();
+            } else {
+                response.params[key] = value.trim();
+            }
+        } else if (value.trim()) {
+            response.params[value.trim().toLowerCase()] = '';
+        }
+
+        // handle parameter value continuations
+        // https://tools.ietf.org/html/rfc2231#section-3
+
+        // preprocess values
+        Object.keys(response.params).forEach(key => {
+            let actualKey, nr, match, value;
+            if ((match = key.match(/(\*(\d+)|\*(\d+)\*|\*)$/))) {
+                actualKey = key.substr(0, match.index);
+                nr = Number(match[2] || match[3]) || 0;
+
+                if (!response.params[actualKey] || typeof response.params[actualKey] !== 'object') {
+                    response.params[actualKey] = {
+                        charset: false,
+                        values: []
+                    };
+                }
+
+                value = response.params[key];
+
+                if (nr === 0 && match[0].substr(-1) === '*' && (match = value.match(/^([^']*)'[^']*'(.*)$/))) {
+                    response.params[actualKey].charset = match[1] || 'iso-8859-1';
+                    value = match[2];
+                }
+
+                response.params[actualKey].values[nr] = value;
+
+                // remove the old reference
+                delete response.params[key];
+            }
+        });
+
+        // concatenate split rfc2231 strings and convert encoded strings to mime encoded words
+        Object.keys(response.params).forEach(key => {
+            let value;
+            if (response.params[key] && Array.isArray(response.params[key].values)) {
+                value = response.params[key].values.map(val => val || '').join('');
+
+                if (response.params[key].charset) {
+                    // convert "%AB" to "=?charset?Q?=AB?="
+                    response.params[key] =
+                        '=?' +
+                        response.params[key].charset +
+                        '?Q?' +
+                        value
+                            // fix invalidly encoded chars
+                            .replace(/[=?_\s]/g, s => {
+                                let c = s.charCodeAt(0).toString(16);
+                                if (s === ' ') {
+                                    return '_';
+                                } else {
+                                    return '%' + (c.length < 2 ? '0' : '') + c;
+                                }
+                            })
+                            // change from urlencoding to percent encoding
+                            .replace(/%/g, '=') +
+                        '?=';
+                } else {
+                    response.params[key] = value;
+                }
+            }
+        });
+
+        return response;
+    },
+
+    /**
+     * Returns file extension for a content type string. If no suitable extensions
+     * are found, 'bin' is used as the default extension
+     *
+     * @param {String} mimeType Content type to be checked for
+     * @return {String} File extension
+     */
+    detectExtension: mimeType => mimeTypes.detectExtension(mimeType),
+
+    /**
+     * Returns content type for a file extension. If no suitable content types
+     * are found, 'application/octet-stream' is used as the default content type
+     *
+     * @param {String} extension Extension to be checked for
+     * @return {String} File extension
+     */
+    detectMimeType: extension => mimeTypes.detectMimeType(extension),
+
+    /**
+     * Folds long lines, useful for folding header lines (afterSpace=false) and
+     * flowed text (afterSpace=true)
+     *
+     * @param {String} str String to be folded
+     * @param {Number} [lineLength=76] Maximum length of a line
+     * @param {Boolean} afterSpace If true, leave a space in th end of a line
+     * @return {String} String with folded lines
+     */
+    foldLines(str, lineLength, afterSpace) {
+        str = (str || '').toString();
+        lineLength = lineLength || 76;
+
+        let pos = 0,
+            len = str.length,
+            result = '',
+            line,
+            match;
+
+        while (pos < len) {
+            line = str.substr(pos, lineLength);
+            if (line.length < lineLength) {
+                result += line;
+                break;
+            }
+            if ((match = line.match(/^[^\n\r]*(\r?\n|\r)/))) {
+                line = match[0];
+                result += line;
+                pos += line.length;
+                continue;
+            } else if ((match = line.match(/(\s+)[^\s]*$/)) && match[0].length - (afterSpace ? (match[1] || '').length : 0) < line.length) {
+                line = line.substr(0, line.length - (match[0].length - (afterSpace ? (match[1] || '').length : 0)));
+            } else if ((match = str.substr(pos + line.length).match(/^[^\s]+(\s*)/))) {
+                line = line + match[0].substr(0, match[0].length - (!afterSpace ? (match[1] || '').length : 0));
+            }
+
+            result += line;
+            pos += line.length;
+            if (pos < len) {
+                result += '\r\n';
+            }
+        }
+
+        return result;
+    },
+
+    /**
+     * Splits a mime encoded string. Needed for dividing mime words into smaller chunks
+     *
+     * @param {String} str Mime encoded string to be split up
+     * @param {Number} maxlen Maximum length of characters for one part (minimum 12)
+     * @return {Array} Split string
+     */
+    splitMimeEncodedString: (str, maxlen) => {
+        let curLine,
+            match,
+            chr,
+            done,
+            lines = [];
+
+        // require at least 12 symbols to fit possible 4 octet UTF-8 sequences
+        maxlen = Math.max(maxlen || 0, 12);
+
+        while (str.length) {
+            curLine = str.substr(0, maxlen);
+
+            // move incomplete escaped char back to main
+            if ((match = curLine.match(/[=][0-9A-F]?$/i))) {
+                curLine = curLine.substr(0, match.index);
+            }
+
+            done = false;
+            while (!done) {
+                done = true;
+                // check if not middle of a unicode char sequence
+                if ((match = str.substr(curLine.length).match(/^[=]([0-9A-F]{2})/i))) {
+                    chr = parseInt(match[1], 16);
+                    // invalid sequence, move one char back anc recheck
+                    if (chr < 0xc2 && chr > 0x7f) {
+                        curLine = curLine.substr(0, curLine.length - 3);
+                        done = false;
+                    }
+                }
+            }
+
+            if (curLine.length) {
+                lines.push(curLine);
+            }
+            str = str.substr(curLine.length);
+        }
+
+        return lines;
+    },
+
+    encodeURICharComponent: chr => {
+        let res = '';
+        let ord = chr.charCodeAt(0).toString(16).toUpperCase();
+
+        if (ord.length % 2) {
+            ord = '0' + ord;
+        }
+
+        if (ord.length > 2) {
+            for (let i = 0, len = ord.length / 2; i < len; i++) {
+                res += '%' + ord.substr(i, 2);
+            }
+        } else {
+            res += '%' + ord;
+        }
+
+        return res;
+    },
+
+    safeEncodeURIComponent(str) {
+        str = (str || '').toString();
+
+        try {
+            // might throw if we try to encode invalid sequences, eg. partial emoji
+            str = encodeURIComponent(str);
+        } catch (E) {
+            // should never run
+            return str.replace(/[^\x00-\x1F *'()<>@,;:\\"[\]?=\u007F-\uFFFF]+/g, '');
+        }
+
+        // ensure chars that are not handled by encodeURICompent are converted as well
+        return str.replace(/[\x00-\x1F *'()<>@,;:\\"[\]?=\u007F-\uFFFF]/g, chr => this.encodeURICharComponent(chr));
+    }
+};

backend/apis/nodejs/node_modules/nodemailer/lib/mime-node/last-newline.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+class LastNewline extends Transform {
+    constructor() {
+        super();
+        this.lastByte = false;
+    }
+
+    _transform(chunk, encoding, done) {
+        if (chunk.length) {
+            this.lastByte = chunk[chunk.length - 1];
+        }
+
+        this.push(chunk);
+        done();
+    }
+
+    _flush(done) {
+        if (this.lastByte === 0x0a) {
+            return done();
+        }
+        if (this.lastByte === 0x0d) {
+            this.push(Buffer.from('\n'));
+            return done();
+        }
+        this.push(Buffer.from('\r\n'));
+        return done();
+    }
+}
+
+module.exports = LastNewline;

backend/apis/nodejs/node_modules/nodemailer/lib/mime-node/le-unix.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const stream = require('stream');
+const Transform = stream.Transform;
+
+/**
+ * Ensures that only <LF> is used for linebreaks
+ *
+ * @param {Object} options Stream options
+ */
+class LeWindows extends Transform {
+    constructor(options) {
+        super(options);
+        // init Transform
+        this.options = options || {};
+    }
+
+    /**
+     * Escapes dots
+     */
+    _transform(chunk, encoding, done) {
+        let buf;
+        let lastPos = 0;
+
+        for (let i = 0, len = chunk.length; i < len; i++) {
+            if (chunk[i] === 0x0d) {
+                // \n
+                buf = chunk.slice(lastPos, i);
+                lastPos = i + 1;
+                this.push(buf);
+            }
+        }
+        if (lastPos && lastPos < chunk.length) {
+            buf = chunk.slice(lastPos);
+            this.push(buf);
+        } else if (!lastPos) {
+            this.push(chunk);
+        }
+        done();
+    }
+}
+
+module.exports = LeWindows;

backend/apis/nodejs/node_modules/nodemailer/lib/mime-node/le-windows.js

@@ -0,0 +1,52 @@
+'use strict';
+
+const stream = require('stream');
+const Transform = stream.Transform;
+
+/**
+ * Ensures that only <CR><LF> sequences are used for linebreaks
+ *
+ * @param {Object} options Stream options
+ */
+class LeWindows extends Transform {
+    constructor(options) {
+        super(options);
+        // init Transform
+        this.options = options || {};
+        this.lastByte = false;
+    }
+
+    /**
+     * Escapes dots
+     */
+    _transform(chunk, encoding, done) {
+        let buf;
+        let lastPos = 0;
+
+        for (let i = 0, len = chunk.length; i < len; i++) {
+            if (chunk[i] === 0x0a) {
+                // \n
+                if ((i && chunk[i - 1] !== 0x0d) || (!i && this.lastByte !== 0x0d)) {
+                    if (i > lastPos) {
+                        buf = chunk.slice(lastPos, i);
+                        this.push(buf);
+                    }
+                    this.push(Buffer.from('\r\n'));
+                    lastPos = i + 1;
+                }
+            }
+        }
+
+        if (lastPos && lastPos < chunk.length) {
+            buf = chunk.slice(lastPos);
+            this.push(buf);
+        } else if (!lastPos) {
+            this.push(chunk);
+        }
+
+        this.lastByte = chunk[chunk.length - 1];
+        done();
+    }
+}
+
+module.exports = LeWindows;

backend/apis/nodejs/node_modules/nodemailer/lib/nodemailer.js

@@ -0,0 +1,150 @@
+'use strict';
+
+const Mailer = require('./mailer');
+const shared = require('./shared');
+const SMTPPool = require('./smtp-pool');
+const SMTPTransport = require('./smtp-transport');
+const SendmailTransport = require('./sendmail-transport');
+const StreamTransport = require('./stream-transport');
+const JSONTransport = require('./json-transport');
+const SESTransport = require('./ses-transport');
+const nmfetch = require('./fetch');
+const packageData = require('../package.json');
+
+const ETHEREAL_API = (process.env.ETHEREAL_API || 'https://api.nodemailer.com').replace(/\/+$/, '');
+const ETHEREAL_WEB = (process.env.ETHEREAL_WEB || 'https://ethereal.email').replace(/\/+$/, '');
+const ETHEREAL_API_KEY = (process.env.ETHEREAL_API_KEY || '').replace(/\s*/g, '') || null;
+const ETHEREAL_CACHE = ['true', 'yes', 'y', '1'].includes((process.env.ETHEREAL_CACHE || 'yes').toString().trim().toLowerCase());
+
+let testAccount = false;
+
+module.exports.createTransport = function (transporter, defaults) {
+    let urlConfig;
+    let options;
+    let mailer;
+
+    if (
+        // provided transporter is a configuration object, not transporter plugin
+        (typeof transporter === 'object' && typeof transporter.send !== 'function') ||
+        // provided transporter looks like a connection url
+        (typeof transporter === 'string' && /^(smtps?|direct):/i.test(transporter))
+    ) {
+        if ((urlConfig = typeof transporter === 'string' ? transporter : transporter.url)) {
+            // parse a configuration URL into configuration options
+            options = shared.parseConnectionUrl(urlConfig);
+        } else {
+            options = transporter;
+        }
+
+        if (options.pool) {
+            transporter = new SMTPPool(options);
+        } else if (options.sendmail) {
+            transporter = new SendmailTransport(options);
+        } else if (options.streamTransport) {
+            transporter = new StreamTransport(options);
+        } else if (options.jsonTransport) {
+            transporter = new JSONTransport(options);
+        } else if (options.SES) {
+            transporter = new SESTransport(options);
+        } else {
+            transporter = new SMTPTransport(options);
+        }
+    }
+
+    mailer = new Mailer(transporter, options, defaults);
+
+    return mailer;
+};
+
+module.exports.createTestAccount = function (apiUrl, callback) {
+    let promise;
+
+    if (!callback && typeof apiUrl === 'function') {
+        callback = apiUrl;
+        apiUrl = false;
+    }
+
+    if (!callback) {
+        promise = new Promise((resolve, reject) => {
+            callback = shared.callbackPromise(resolve, reject);
+        });
+    }
+
+    if (ETHEREAL_CACHE && testAccount) {
+        setImmediate(() => callback(null, testAccount));
+        return promise;
+    }
+
+    apiUrl = apiUrl || ETHEREAL_API;
+
+    let chunks = [];
+    let chunklen = 0;
+
+    let requestHeaders = {};
+    let requestBody = {
+        requestor: packageData.name,
+        version: packageData.version
+    };
+
+    if (ETHEREAL_API_KEY) {
+        requestHeaders.Authorization = 'Bearer ' + ETHEREAL_API_KEY;
+    }
+
+    let req = nmfetch(apiUrl + '/user', {
+        contentType: 'application/json',
+        method: 'POST',
+        headers: requestHeaders,
+        body: Buffer.from(JSON.stringify(requestBody))
+    });
+
+    req.on('readable', () => {
+        let chunk;
+        while ((chunk = req.read()) !== null) {
+            chunks.push(chunk);
+            chunklen += chunk.length;
+        }
+    });
+
+    req.once('error', err => callback(err));
+
+    req.once('end', () => {
+        let res = Buffer.concat(chunks, chunklen);
+        let data;
+        let err;
+        try {
+            data = JSON.parse(res.toString());
+        } catch (E) {
+            err = E;
+        }
+        if (err) {
+            return callback(err);
+        }
+        if (data.status !== 'success' || data.error) {
+            return callback(new Error(data.error || 'Request failed'));
+        }
+        delete data.status;
+        testAccount = data;
+        callback(null, testAccount);
+    });
+
+    return promise;
+};
+
+module.exports.getTestMessageUrl = function (info) {
+    if (!info || !info.response) {
+        return false;
+    }
+
+    let infoProps = new Map();
+    info.response.replace(/\[([^\]]+)\]$/, (m, props) => {
+        props.replace(/\b([A-Z0-9]+)=([^\s]+)/g, (m, key, value) => {
+            infoProps.set(key, value);
+        });
+    });
+
+    if (infoProps.has('STATUS') && infoProps.has('MSGID')) {
+        return (testAccount.web || ETHEREAL_WEB) + '/message/' + infoProps.get('MSGID');
+    }
+
+    return false;
+};

backend/apis/nodejs/node_modules/nodemailer/lib/punycode/index.js

@@ -0,0 +1,460 @@
+/*
+
+Copied from https://github.com/mathiasbynens/punycode.js/blob/ef3505c8abb5143a00d53ce59077c9f7f4b2ac47/punycode.js
+
+Copyright Mathias Bynens <https://mathiasbynens.be/>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+/* eslint callback-return: 0, no-bitwise: 0, eqeqeq: 0, prefer-arrow-callback: 0, object-shorthand: 0 */
+
+'use strict';
+
+/** Highest positive signed 32-bit float value */
+const maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+
+/** Bootstring parameters */
+const base = 36;
+const tMin = 1;
+const tMax = 26;
+const skew = 38;
+const damp = 700;
+const initialBias = 72;
+const initialN = 128; // 0x80
+const delimiter = '-'; // '\x2D'
+
+/** Regular expressions */
+const regexPunycode = /^xn--/;
+const regexNonASCII = /[^\0-\x7F]/; // Note: U+007F DEL is excluded too.
+const regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+
+/** Error messages */
+const errors = {
+    overflow: 'Overflow: input needs wider integers to process',
+    'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
+    'invalid-input': 'Invalid input'
+};
+
+/** Convenience shortcuts */
+const baseMinusTMin = base - tMin;
+const floor = Math.floor;
+const stringFromCharCode = String.fromCharCode;
+
+/*--------------------------------------------------------------------------*/
+
+/**
+ * A generic error utility function.
+ * @private
+ * @param {String} type The error type.
+ * @returns {Error} Throws a `RangeError` with the applicable error message.
+ */
+function error(type) {
+    throw new RangeError(errors[type]);
+}
+
+/**
+ * A generic `Array#map` utility function.
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} callback The function that gets called for every array
+ * item.
+ * @returns {Array} A new array of values returned by the callback function.
+ */
+function map(array, callback) {
+    const result = [];
+    let length = array.length;
+    while (length--) {
+        result[length] = callback(array[length]);
+    }
+    return result;
+}
+
+/**
+ * A simple `Array#map`-like wrapper to work with domain name strings or email
+ * addresses.
+ * @private
+ * @param {String} domain The domain name or email address.
+ * @param {Function} callback The function that gets called for every
+ * character.
+ * @returns {String} A new string of characters returned by the callback
+ * function.
+ */
+function mapDomain(domain, callback) {
+    const parts = domain.split('@');
+    let result = '';
+    if (parts.length > 1) {
+        // In email addresses, only the domain name should be punycoded. Leave
+        // the local part (i.e. everything up to `@`) intact.
+        result = parts[0] + '@';
+        domain = parts[1];
+    }
+    // Avoid `split(regex)` for IE8 compatibility. See #17.
+    domain = domain.replace(regexSeparators, '\x2E');
+    const labels = domain.split('.');
+    const encoded = map(labels, callback).join('.');
+    return result + encoded;
+}
+
+/**
+ * Creates an array containing the numeric code points of each Unicode
+ * character in the string. While JavaScript uses UCS-2 internally,
+ * this function will convert a pair of surrogate halves (each of which
+ * UCS-2 exposes as separate characters) into a single code point,
+ * matching UTF-16.
+ * @see `punycode.ucs2.encode`
+ * @see <https://mathiasbynens.be/notes/javascript-encoding>
+ * @memberOf punycode.ucs2
+ * @name decode
+ * @param {String} string The Unicode input string (UCS-2).
+ * @returns {Array} The new array of code points.
+ */
+function ucs2decode(string) {
+    const output = [];
+    let counter = 0;
+    const length = string.length;
+    while (counter < length) {
+        const value = string.charCodeAt(counter++);
+        if (value >= 0xd800 && value <= 0xdbff && counter < length) {
+            // It's a high surrogate, and there is a next character.
+            const extra = string.charCodeAt(counter++);
+            if ((extra & 0xfc00) == 0xdc00) {
+                // Low surrogate.
+                output.push(((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000);
+            } else {
+                // It's an unmatched surrogate; only append this code unit, in case the
+                // next code unit is the high surrogate of a surrogate pair.
+                output.push(value);
+                counter--;
+            }
+        } else {
+            output.push(value);
+        }
+    }
+    return output;
+}
+
+/**
+ * Creates a string based on an array of numeric code points.
+ * @see `punycode.ucs2.decode`
+ * @memberOf punycode.ucs2
+ * @name encode
+ * @param {Array} codePoints The array of numeric code points.
+ * @returns {String} The new Unicode string (UCS-2).
+ */
+const ucs2encode = codePoints => String.fromCodePoint(...codePoints);
+
+/**
+ * Converts a basic code point into a digit/integer.
+ * @see `digitToBasic()`
+ * @private
+ * @param {Number} codePoint The basic numeric code point value.
+ * @returns {Number} The numeric value of a basic code point (for use in
+ * representing integers) in the range `0` to `base - 1`, or `base` if
+ * the code point does not represent a value.
+ */
+const basicToDigit = function (codePoint) {
+    if (codePoint >= 0x30 && codePoint < 0x3a) {
+        return 26 + (codePoint - 0x30);
+    }
+    if (codePoint >= 0x41 && codePoint < 0x5b) {
+        return codePoint - 0x41;
+    }
+    if (codePoint >= 0x61 && codePoint < 0x7b) {
+        return codePoint - 0x61;
+    }
+    return base;
+};
+
+/**
+ * Converts a digit/integer into a basic code point.
+ * @see `basicToDigit()`
+ * @private
+ * @param {Number} digit The numeric value of a basic code point.
+ * @returns {Number} The basic code point whose value (when used for
+ * representing integers) is `digit`, which needs to be in the range
+ * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
+ * used; else, the lowercase form is used. The behavior is undefined
+ * if `flag` is non-zero and `digit` has no uppercase form.
+ */
+const digitToBasic = function (digit, flag) {
+    //  0..25 map to ASCII a..z or A..Z
+    // 26..35 map to ASCII 0..9
+    return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
+};
+
+/**
+ * Bias adaptation function as per section 3.4 of RFC 3492.
+ * https://tools.ietf.org/html/rfc3492#section-3.4
+ * @private
+ */
+const adapt = function (delta, numPoints, firstTime) {
+    let k = 0;
+    delta = firstTime ? floor(delta / damp) : delta >> 1;
+    delta += floor(delta / numPoints);
+    for (; /* no initialization */ delta > (baseMinusTMin * tMax) >> 1; k += base) {
+        delta = floor(delta / baseMinusTMin);
+    }
+    return floor(k + ((baseMinusTMin + 1) * delta) / (delta + skew));
+};
+
+/**
+ * Converts a Punycode string of ASCII-only symbols to a string of Unicode
+ * symbols.
+ * @memberOf punycode
+ * @param {String} input The Punycode string of ASCII-only symbols.
+ * @returns {String} The resulting string of Unicode symbols.
+ */
+const decode = function (input) {
+    // Don't use UCS-2.
+    const output = [];
+    const inputLength = input.length;
+    let i = 0;
+    let n = initialN;
+    let bias = initialBias;
+
+    // Handle the basic code points: let `basic` be the number of input code
+    // points before the last delimiter, or `0` if there is none, then copy
+    // the first basic code points to the output.
+
+    let basic = input.lastIndexOf(delimiter);
+    if (basic < 0) {
+        basic = 0;
+    }
+
+    for (let j = 0; j < basic; ++j) {
+        // if it's not a basic code point
+        if (input.charCodeAt(j) >= 0x80) {
+            error('not-basic');
+        }
+        output.push(input.charCodeAt(j));
+    }
+
+    // Main decoding loop: start just after the last delimiter if any basic code
+    // points were copied; start at the beginning otherwise.
+
+    for (let index = basic > 0 ? basic + 1 : 0; index < inputLength /* no final expression */; ) {
+        // `index` is the index of the next character to be consumed.
+        // Decode a generalized variable-length integer into `delta`,
+        // which gets added to `i`. The overflow checking is easier
+        // if we increase `i` as we go, then subtract off its starting
+        // value at the end to obtain `delta`.
+        const oldi = i;
+        for (let w = 1, k = base /* no condition */; ; k += base) {
+            if (index >= inputLength) {
+                error('invalid-input');
+            }
+
+            const digit = basicToDigit(input.charCodeAt(index++));
+
+            if (digit >= base) {
+                error('invalid-input');
+            }
+            if (digit > floor((maxInt - i) / w)) {
+                error('overflow');
+            }
+
+            i += digit * w;
+            const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
+
+            if (digit < t) {
+                break;
+            }
+
+            const baseMinusT = base - t;
+            if (w > floor(maxInt / baseMinusT)) {
+                error('overflow');
+            }
+
+            w *= baseMinusT;
+        }
+
+        const out = output.length + 1;
+        bias = adapt(i - oldi, out, oldi == 0);
+
+        // `i` was supposed to wrap around from `out` to `0`,
+        // incrementing `n` each time, so we'll fix that now:
+        if (floor(i / out) > maxInt - n) {
+            error('overflow');
+        }
+
+        n += floor(i / out);
+        i %= out;
+
+        // Insert `n` at position `i` of the output.
+        output.splice(i++, 0, n);
+    }
+
+    return String.fromCodePoint(...output);
+};
+
+/**
+ * Converts a string of Unicode symbols (e.g. a domain name label) to a
+ * Punycode string of ASCII-only symbols.
+ * @memberOf punycode
+ * @param {String} input The string of Unicode symbols.
+ * @returns {String} The resulting Punycode string of ASCII-only symbols.
+ */
+const encode = function (input) {
+    const output = [];
+
+    // Convert the input in UCS-2 to an array of Unicode code points.
+    input = ucs2decode(input);
+
+    // Cache the length.
+    const inputLength = input.length;
+
+    // Initialize the state.
+    let n = initialN;
+    let delta = 0;
+    let bias = initialBias;
+
+    // Handle the basic code points.
+    for (const currentValue of input) {
+        if (currentValue < 0x80) {
+            output.push(stringFromCharCode(currentValue));
+        }
+    }
+
+    const basicLength = output.length;
+    let handledCPCount = basicLength;
+
+    // `handledCPCount` is the number of code points that have been handled;
+    // `basicLength` is the number of basic code points.
+
+    // Finish the basic string with a delimiter unless it's empty.
+    if (basicLength) {
+        output.push(delimiter);
+    }
+
+    // Main encoding loop:
+    while (handledCPCount < inputLength) {
+        // All non-basic code points < n have been handled already. Find the next
+        // larger one:
+        let m = maxInt;
+        for (const currentValue of input) {
+            if (currentValue >= n && currentValue < m) {
+                m = currentValue;
+            }
+        }
+
+        // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
+        // but guard against overflow.
+        const handledCPCountPlusOne = handledCPCount + 1;
+        if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
+            error('overflow');
+        }
+
+        delta += (m - n) * handledCPCountPlusOne;
+        n = m;
+
+        for (const currentValue of input) {
+            if (currentValue < n && ++delta > maxInt) {
+                error('overflow');
+            }
+            if (currentValue === n) {
+                // Represent delta as a generalized variable-length integer.
+                let q = delta;
+                for (let k = base /* no condition */; ; k += base) {
+                    const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
+                    if (q < t) {
+                        break;
+                    }
+                    const qMinusT = q - t;
+                    const baseMinusT = base - t;
+                    output.push(stringFromCharCode(digitToBasic(t + (qMinusT % baseMinusT), 0)));
+                    q = floor(qMinusT / baseMinusT);
+                }
+
+                output.push(stringFromCharCode(digitToBasic(q, 0)));
+                bias = adapt(delta, handledCPCountPlusOne, handledCPCount === basicLength);
+                delta = 0;
+                ++handledCPCount;
+            }
+        }
+
+        ++delta;
+        ++n;
+    }
+    return output.join('');
+};
+
+/**
+ * Converts a Punycode string representing a domain name or an email address
+ * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
+ * it doesn't matter if you call it on a string that has already been
+ * converted to Unicode.
+ * @memberOf punycode
+ * @param {String} input The Punycoded domain name or email address to
+ * convert to Unicode.
+ * @returns {String} The Unicode representation of the given Punycode
+ * string.
+ */
+const toUnicode = function (input) {
+    return mapDomain(input, function (string) {
+        return regexPunycode.test(string) ? decode(string.slice(4).toLowerCase()) : string;
+    });
+};
+
+/**
+ * Converts a Unicode string representing a domain name or an email address to
+ * Punycode. Only the non-ASCII parts of the domain name will be converted,
+ * i.e. it doesn't matter if you call it with a domain that's already in
+ * ASCII.
+ * @memberOf punycode
+ * @param {String} input The domain name or email address to convert, as a
+ * Unicode string.
+ * @returns {String} The Punycode representation of the given domain name or
+ * email address.
+ */
+const toASCII = function (input) {
+    return mapDomain(input, function (string) {
+        return regexNonASCII.test(string) ? 'xn--' + encode(string) : string;
+    });
+};
+
+/*--------------------------------------------------------------------------*/
+
+/** Define the public API */
+const punycode = {
+    /**
+     * A string representing the current Punycode.js version number.
+     * @memberOf punycode
+     * @type String
+     */
+    version: '2.3.1',
+    /**
+     * An object of methods to convert from JavaScript's internal character
+     * representation (UCS-2) to Unicode code points, and back.
+     * @see <https://mathiasbynens.be/notes/javascript-encoding>
+     * @memberOf punycode
+     * @type Object
+     */
+    ucs2: {
+        decode: ucs2decode,
+        encode: ucs2encode
+    },
+    decode: decode,
+    encode: encode,
+    toASCII: toASCII,
+    toUnicode: toUnicode
+};
+
+module.exports = punycode;

backend/apis/nodejs/node_modules/nodemailer/lib/qp/index.js

@@ -0,0 +1,219 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+/**
+ * Encodes a Buffer into a Quoted-Printable encoded string
+ *
+ * @param {Buffer} buffer Buffer to convert
+ * @returns {String} Quoted-Printable encoded string
+ */
+function encode(buffer) {
+    if (typeof buffer === 'string') {
+        buffer = Buffer.from(buffer, 'utf-8');
+    }
+
+    // usable characters that do not need encoding
+    let ranges = [
+        // https://tools.ietf.org/html/rfc2045#section-6.7
+        [0x09], // <TAB>
+        [0x0a], // <LF>
+        [0x0d], // <CR>
+        [0x20, 0x3c], // <SP>!"#$%&'()*+,-./0123456789:;
+        [0x3e, 0x7e] // >?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}
+    ];
+    let result = '';
+    let ord;
+
+    for (let i = 0, len = buffer.length; i < len; i++) {
+        ord = buffer[i];
+        // if the char is in allowed range, then keep as is, unless it is a WS in the end of a line
+        if (checkRanges(ord, ranges) && !((ord === 0x20 || ord === 0x09) && (i === len - 1 || buffer[i + 1] === 0x0a || buffer[i + 1] === 0x0d))) {
+            result += String.fromCharCode(ord);
+            continue;
+        }
+        result += '=' + (ord < 0x10 ? '0' : '') + ord.toString(16).toUpperCase();
+    }
+
+    return result;
+}
+
+/**
+ * Adds soft line breaks to a Quoted-Printable string
+ *
+ * @param {String} str Quoted-Printable encoded string that might need line wrapping
+ * @param {Number} [lineLength=76] Maximum allowed length for a line
+ * @returns {String} Soft-wrapped Quoted-Printable encoded string
+ */
+function wrap(str, lineLength) {
+    str = (str || '').toString();
+    lineLength = lineLength || 76;
+
+    if (str.length <= lineLength) {
+        return str;
+    }
+
+    let pos = 0;
+    let len = str.length;
+    let match, code, line;
+    let lineMargin = Math.floor(lineLength / 3);
+    let result = '';
+
+    // insert soft linebreaks where needed
+    while (pos < len) {
+        line = str.substr(pos, lineLength);
+        if ((match = line.match(/\r\n/))) {
+            line = line.substr(0, match.index + match[0].length);
+            result += line;
+            pos += line.length;
+            continue;
+        }
+
+        if (line.substr(-1) === '\n') {
+            // nothing to change here
+            result += line;
+            pos += line.length;
+            continue;
+        } else if ((match = line.substr(-lineMargin).match(/\n.*?$/))) {
+            // truncate to nearest line break
+            line = line.substr(0, line.length - (match[0].length - 1));
+            result += line;
+            pos += line.length;
+            continue;
+        } else if (line.length > lineLength - lineMargin && (match = line.substr(-lineMargin).match(/[ \t.,!?][^ \t.,!?]*$/))) {
+            // truncate to nearest space
+            line = line.substr(0, line.length - (match[0].length - 1));
+        } else if (line.match(/[=][\da-f]{0,2}$/i)) {
+            // push incomplete encoding sequences to the next line
+            if ((match = line.match(/[=][\da-f]{0,1}$/i))) {
+                line = line.substr(0, line.length - match[0].length);
+            }
+
+            // ensure that utf-8 sequences are not split
+            while (line.length > 3 && line.length < len - pos && !line.match(/^(?:=[\da-f]{2}){1,4}$/i) && (match = line.match(/[=][\da-f]{2}$/gi))) {
+                code = parseInt(match[0].substr(1, 2), 16);
+                if (code < 128) {
+                    break;
+                }
+
+                line = line.substr(0, line.length - 3);
+
+                if (code >= 0xc0) {
+                    break;
+                }
+            }
+        }
+
+        if (pos + line.length < len && line.substr(-1) !== '\n') {
+            if (line.length === lineLength && line.match(/[=][\da-f]{2}$/i)) {
+                line = line.substr(0, line.length - 3);
+            } else if (line.length === lineLength) {
+                line = line.substr(0, line.length - 1);
+            }
+            pos += line.length;
+            line += '=\r\n';
+        } else {
+            pos += line.length;
+        }
+
+        result += line;
+    }
+
+    return result;
+}
+
+/**
+ * Helper function to check if a number is inside provided ranges
+ *
+ * @param {Number} nr Number to check for
+ * @param {Array} ranges An Array of allowed values
+ * @returns {Boolean} True if the value was found inside allowed ranges, false otherwise
+ */
+function checkRanges(nr, ranges) {
+    for (let i = ranges.length - 1; i >= 0; i--) {
+        if (!ranges[i].length) {
+            continue;
+        }
+        if (ranges[i].length === 1 && nr === ranges[i][0]) {
+            return true;
+        }
+        if (ranges[i].length === 2 && nr >= ranges[i][0] && nr <= ranges[i][1]) {
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * Creates a transform stream for encoding data to Quoted-Printable encoding
+ *
+ * @constructor
+ * @param {Object} options Stream options
+ * @param {Number} [options.lineLength=76] Maximum length for lines, set to false to disable wrapping
+ */
+class Encoder extends Transform {
+    constructor(options) {
+        super();
+
+        // init Transform
+        this.options = options || {};
+
+        if (this.options.lineLength !== false) {
+            this.options.lineLength = this.options.lineLength || 76;
+        }
+
+        this._curLine = '';
+
+        this.inputBytes = 0;
+        this.outputBytes = 0;
+    }
+
+    _transform(chunk, encoding, done) {
+        let qp;
+
+        if (encoding !== 'buffer') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        if (!chunk || !chunk.length) {
+            return done();
+        }
+
+        this.inputBytes += chunk.length;
+
+        if (this.options.lineLength) {
+            qp = this._curLine + encode(chunk);
+            qp = wrap(qp, this.options.lineLength);
+            qp = qp.replace(/(^|\n)([^\n]*)$/, (match, lineBreak, lastLine) => {
+                this._curLine = lastLine;
+                return lineBreak;
+            });
+
+            if (qp) {
+                this.outputBytes += qp.length;
+                this.push(qp);
+            }
+        } else {
+            qp = encode(chunk);
+            this.outputBytes += qp.length;
+            this.push(qp, 'ascii');
+        }
+
+        done();
+    }
+
+    _flush(done) {
+        if (this._curLine) {
+            this.outputBytes += this._curLine.length;
+            this.push(this._curLine, 'ascii');
+        }
+        done();
+    }
+}
+
+// expose to the world
+module.exports = {
+    encode,
+    wrap,
+    Encoder
+};

backend/apis/nodejs/node_modules/nodemailer/lib/sendmail-transport/index.js

@@ -0,0 +1,210 @@
+'use strict';
+
+const spawn = require('child_process').spawn;
+const packageData = require('../../package.json');
+const shared = require('../shared');
+
+/**
+ * Generates a Transport object for Sendmail
+ *
+ * Possible options can be the following:
+ *
+ *  * **path** optional path to sendmail binary
+ *  * **newline** either 'windows' or 'unix'
+ *  * **args** an array of arguments for the sendmail binary
+ *
+ * @constructor
+ * @param {Object} optional config parameter for Sendmail
+ */
+class SendmailTransport {
+    constructor(options) {
+        options = options || {};
+
+        // use a reference to spawn for mocking purposes
+        this._spawn = spawn;
+
+        this.options = options || {};
+
+        this.name = 'Sendmail';
+        this.version = packageData.version;
+
+        this.path = 'sendmail';
+        this.args = false;
+        this.winbreak = false;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'sendmail'
+        });
+
+        if (options) {
+            if (typeof options === 'string') {
+                this.path = options;
+            } else if (typeof options === 'object') {
+                if (options.path) {
+                    this.path = options.path;
+                }
+                if (Array.isArray(options.args)) {
+                    this.args = options.args;
+                }
+                this.winbreak = ['win', 'windows', 'dos', '\r\n'].includes((options.newline || '').toString().toLowerCase());
+            }
+        }
+    }
+
+    /**
+     * <p>Compiles a mailcomposer message and forwards it to handler that sends it.</p>
+     *
+     * @param {Object} emailMessage MailComposer object
+     * @param {Function} callback Callback function to run when the sending is completed
+     */
+    send(mail, done) {
+        // Sendmail strips this header line by itself
+        mail.message.keepBcc = true;
+
+        let envelope = mail.data.envelope || mail.message.getEnvelope();
+        let messageId = mail.message.messageId();
+        let args;
+        let sendmail;
+        let returned;
+
+        const hasInvalidAddresses = []
+            .concat(envelope.from || [])
+            .concat(envelope.to || [])
+            .some(addr => /^-/.test(addr));
+        if (hasInvalidAddresses) {
+            return done(new Error('Can not send mail. Invalid envelope addresses.'));
+        }
+
+        if (this.args) {
+            // force -i to keep single dots
+            args = ['-i'].concat(this.args).concat(envelope.to);
+        } else {
+            args = ['-i'].concat(envelope.from ? ['-f', envelope.from] : []).concat(envelope.to);
+        }
+
+        let callback = err => {
+            if (returned) {
+                // ignore any additional responses, already done
+                return;
+            }
+            returned = true;
+            if (typeof done === 'function') {
+                if (err) {
+                    return done(err);
+                } else {
+                    return done(null, {
+                        envelope: mail.data.envelope || mail.message.getEnvelope(),
+                        messageId,
+                        response: 'Messages queued for delivery'
+                    });
+                }
+            }
+        };
+
+        try {
+            sendmail = this._spawn(this.path, args);
+        } catch (E) {
+            this.logger.error(
+                {
+                    err: E,
+                    tnx: 'spawn',
+                    messageId
+                },
+                'Error occurred while spawning sendmail. %s',
+                E.message
+            );
+            return callback(E);
+        }
+
+        if (sendmail) {
+            sendmail.on('error', err => {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'spawn',
+                        messageId
+                    },
+                    'Error occurred when sending message %s. %s',
+                    messageId,
+                    err.message
+                );
+                callback(err);
+            });
+
+            sendmail.once('exit', code => {
+                if (!code) {
+                    return callback();
+                }
+                let err;
+                if (code === 127) {
+                    err = new Error('Sendmail command not found, process exited with code ' + code);
+                } else {
+                    err = new Error('Sendmail exited with code ' + code);
+                }
+
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'stdin',
+                        messageId
+                    },
+                    'Error sending message %s to sendmail. %s',
+                    messageId,
+                    err.message
+                );
+                callback(err);
+            });
+            sendmail.once('close', callback);
+
+            sendmail.stdin.on('error', err => {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'stdin',
+                        messageId
+                    },
+                    'Error occurred when piping message %s to sendmail. %s',
+                    messageId,
+                    err.message
+                );
+                callback(err);
+            });
+
+            let recipients = [].concat(envelope.to || []);
+            if (recipients.length > 3) {
+                recipients.push('...and ' + recipients.splice(2).length + ' more');
+            }
+            this.logger.info(
+                {
+                    tnx: 'send',
+                    messageId
+                },
+                'Sending message %s to <%s>',
+                messageId,
+                recipients.join(', ')
+            );
+
+            let sourceStream = mail.message.createReadStream();
+            sourceStream.once('error', err => {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'stdin',
+                        messageId
+                    },
+                    'Error occurred when generating message %s. %s',
+                    messageId,
+                    err.message
+                );
+                sendmail.kill('SIGINT'); // do not deliver the message
+                callback(err);
+            });
+
+            sourceStream.pipe(sendmail.stdin);
+        } else {
+            return callback(new Error('sendmail was not found'));
+        }
+    }
+}
+
+module.exports = SendmailTransport;

backend/apis/nodejs/node_modules/nodemailer/lib/ses-transport/index.js

@@ -0,0 +1,349 @@
+'use strict';
+
+const EventEmitter = require('events');
+const packageData = require('../../package.json');
+const shared = require('../shared');
+const LeWindows = require('../mime-node/le-windows');
+
+/**
+ * Generates a Transport object for AWS SES
+ *
+ * Possible options can be the following:
+ *
+ *  * **sendingRate** optional Number specifying how many messages per second should be delivered to SES
+ *  * **maxConnections** optional Number specifying max number of parallel connections to SES
+ *
+ * @constructor
+ * @param {Object} optional config parameter
+ */
+class SESTransport extends EventEmitter {
+    constructor(options) {
+        super();
+        options = options || {};
+
+        this.options = options || {};
+        this.ses = this.options.SES;
+
+        this.name = 'SESTransport';
+        this.version = packageData.version;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'ses-transport'
+        });
+
+        // parallel sending connections
+        this.maxConnections = Number(this.options.maxConnections) || Infinity;
+        this.connections = 0;
+
+        // max messages per second
+        this.sendingRate = Number(this.options.sendingRate) || Infinity;
+        this.sendingRateTTL = null;
+        this.rateInterval = 1000; // milliseconds
+        this.rateMessages = [];
+
+        this.pending = [];
+
+        this.idling = true;
+
+        setImmediate(() => {
+            if (this.idling) {
+                this.emit('idle');
+            }
+        });
+    }
+
+    /**
+     * Schedules a sending of a message
+     *
+     * @param {Object} emailMessage MailComposer object
+     * @param {Function} callback Callback function to run when the sending is completed
+     */
+    send(mail, callback) {
+        if (this.connections >= this.maxConnections) {
+            this.idling = false;
+            return this.pending.push({
+                mail,
+                callback
+            });
+        }
+
+        if (!this._checkSendingRate()) {
+            this.idling = false;
+            return this.pending.push({
+                mail,
+                callback
+            });
+        }
+
+        this._send(mail, (...args) => {
+            setImmediate(() => callback(...args));
+            this._sent();
+        });
+    }
+
+    _checkRatedQueue() {
+        if (this.connections >= this.maxConnections || !this._checkSendingRate()) {
+            return;
+        }
+
+        if (!this.pending.length) {
+            if (!this.idling) {
+                this.idling = true;
+                this.emit('idle');
+            }
+            return;
+        }
+
+        let next = this.pending.shift();
+        this._send(next.mail, (...args) => {
+            setImmediate(() => next.callback(...args));
+            this._sent();
+        });
+    }
+
+    _checkSendingRate() {
+        clearTimeout(this.sendingRateTTL);
+
+        let now = Date.now();
+        let oldest = false;
+        // delete older messages
+        for (let i = this.rateMessages.length - 1; i >= 0; i--) {
+            if (this.rateMessages[i].ts >= now - this.rateInterval && (!oldest || this.rateMessages[i].ts < oldest)) {
+                oldest = this.rateMessages[i].ts;
+            }
+
+            if (this.rateMessages[i].ts < now - this.rateInterval && !this.rateMessages[i].pending) {
+                this.rateMessages.splice(i, 1);
+            }
+        }
+
+        if (this.rateMessages.length < this.sendingRate) {
+            return true;
+        }
+
+        let delay = Math.max(oldest + 1001, now + 20);
+        this.sendingRateTTL = setTimeout(() => this._checkRatedQueue(), now - delay);
+
+        try {
+            this.sendingRateTTL.unref();
+        } catch (E) {
+            // Ignore. Happens on envs with non-node timer implementation
+        }
+
+        return false;
+    }
+
+    _sent() {
+        this.connections--;
+        this._checkRatedQueue();
+    }
+
+    /**
+     * Returns true if there are free slots in the queue
+     */
+    isIdle() {
+        return this.idling;
+    }
+
+    /**
+     * Compiles a mailcomposer message and forwards it to SES
+     *
+     * @param {Object} emailMessage MailComposer object
+     * @param {Function} callback Callback function to run when the sending is completed
+     */
+    _send(mail, callback) {
+        let statObject = {
+            ts: Date.now(),
+            pending: true
+        };
+        this.connections++;
+        this.rateMessages.push(statObject);
+
+        let envelope = mail.data.envelope || mail.message.getEnvelope();
+        let messageId = mail.message.messageId();
+
+        let recipients = [].concat(envelope.to || []);
+        if (recipients.length > 3) {
+            recipients.push('...and ' + recipients.splice(2).length + ' more');
+        }
+        this.logger.info(
+            {
+                tnx: 'send',
+                messageId
+            },
+            'Sending message %s to <%s>',
+            messageId,
+            recipients.join(', ')
+        );
+
+        let getRawMessage = next => {
+            // do not use Message-ID and Date in DKIM signature
+            if (!mail.data._dkim) {
+                mail.data._dkim = {};
+            }
+            if (mail.data._dkim.skipFields && typeof mail.data._dkim.skipFields === 'string') {
+                mail.data._dkim.skipFields += ':date:message-id';
+            } else {
+                mail.data._dkim.skipFields = 'date:message-id';
+            }
+
+            let sourceStream = mail.message.createReadStream();
+            let stream = sourceStream.pipe(new LeWindows());
+            let chunks = [];
+            let chunklen = 0;
+
+            stream.on('readable', () => {
+                let chunk;
+                while ((chunk = stream.read()) !== null) {
+                    chunks.push(chunk);
+                    chunklen += chunk.length;
+                }
+            });
+
+            sourceStream.once('error', err => stream.emit('error', err));
+
+            stream.once('error', err => {
+                next(err);
+            });
+
+            stream.once('end', () => next(null, Buffer.concat(chunks, chunklen)));
+        };
+
+        setImmediate(() =>
+            getRawMessage((err, raw) => {
+                if (err) {
+                    this.logger.error(
+                        {
+                            err,
+                            tnx: 'send',
+                            messageId
+                        },
+                        'Failed creating message for %s. %s',
+                        messageId,
+                        err.message
+                    );
+                    statObject.pending = false;
+                    return callback(err);
+                }
+
+                let sesMessage = {
+                    RawMessage: {
+                        // required
+                        Data: raw // required
+                    },
+                    Source: envelope.from,
+                    Destinations: envelope.to
+                };
+
+                Object.keys(mail.data.ses || {}).forEach(key => {
+                    sesMessage[key] = mail.data.ses[key];
+                });
+
+                let ses = (this.ses.aws ? this.ses.ses : this.ses) || {};
+                let aws = this.ses.aws || {};
+
+                let getRegion = cb => {
+                    if (ses.config && typeof ses.config.region === 'function') {
+                        // promise
+                        return ses.config
+                            .region()
+                            .then(region => cb(null, region))
+                            .catch(err => cb(err));
+                    }
+                    return cb(null, (ses.config && ses.config.region) || 'us-east-1');
+                };
+
+                getRegion((err, region) => {
+                    if (err || !region) {
+                        region = 'us-east-1';
+                    }
+
+                    let sendPromise;
+                    if (typeof ses.send === 'function' && aws.SendRawEmailCommand) {
+                        // v3 API
+                        sendPromise = ses.send(new aws.SendRawEmailCommand(sesMessage));
+                    } else {
+                        // v2 API
+                        sendPromise = ses.sendRawEmail(sesMessage).promise();
+                    }
+
+                    sendPromise
+                        .then(data => {
+                            if (region === 'us-east-1') {
+                                region = 'email';
+                            }
+
+                            statObject.pending = false;
+                            callback(null, {
+                                envelope: {
+                                    from: envelope.from,
+                                    to: envelope.to
+                                },
+                                messageId: '<' + data.MessageId + (!/@/.test(data.MessageId) ? '@' + region + '.amazonses.com' : '') + '>',
+                                response: data.MessageId,
+                                raw
+                            });
+                        })
+                        .catch(err => {
+                            this.logger.error(
+                                {
+                                    err,
+                                    tnx: 'send'
+                                },
+                                'Send error for %s: %s',
+                                messageId,
+                                err.message
+                            );
+                            statObject.pending = false;
+                            callback(err);
+                        });
+                });
+            })
+        );
+    }
+
+    /**
+     * Verifies SES configuration
+     *
+     * @param {Function} callback Callback function
+     */
+    verify(callback) {
+        let promise;
+        let ses = (this.ses.aws ? this.ses.ses : this.ses) || {};
+        let aws = this.ses.aws || {};
+
+        const sesMessage = {
+            RawMessage: {
+                // required
+                Data: 'From: invalid@invalid\r\nTo: invalid@invalid\r\n Subject: Invalid\r\n\r\nInvalid'
+            },
+            Source: 'invalid@invalid',
+            Destinations: ['invalid@invalid']
+        };
+
+        if (!callback) {
+            promise = new Promise((resolve, reject) => {
+                callback = shared.callbackPromise(resolve, reject);
+            });
+        }
+        const cb = err => {
+            if (err && (err.code || err.Code) !== 'InvalidParameterValue') {
+                return callback(err);
+            }
+            return callback(null, true);
+        };
+
+        if (typeof ses.send === 'function' && aws.SendRawEmailCommand) {
+            // v3 API
+            sesMessage.RawMessage.Data = Buffer.from(sesMessage.RawMessage.Data);
+            ses.send(new aws.SendRawEmailCommand(sesMessage), cb);
+        } else {
+            // v2 API
+            ses.sendRawEmail(sesMessage, cb);
+        }
+
+        return promise;
+    }
+}
+
+module.exports = SESTransport;

backend/apis/nodejs/node_modules/nodemailer/lib/shared/index.js

@@ -0,0 +1,688 @@
+/* eslint no-console: 0 */
+
+'use strict';
+
+const urllib = require('url');
+const util = require('util');
+const fs = require('fs');
+const nmfetch = require('../fetch');
+const dns = require('dns');
+const net = require('net');
+const os = require('os');
+
+const DNS_TTL = 5 * 60 * 1000;
+
+let networkInterfaces;
+try {
+    networkInterfaces = os.networkInterfaces();
+} catch (err) {
+    // fails on some systems
+}
+
+module.exports.networkInterfaces = networkInterfaces;
+
+const isFamilySupported = (family, allowInternal) => {
+    let networkInterfaces = module.exports.networkInterfaces;
+    if (!networkInterfaces) {
+        // hope for the best
+        return true;
+    }
+
+    const familySupported =
+        // crux that replaces Object.values(networkInterfaces) as Object.values is not supported in nodejs v6
+        Object.keys(networkInterfaces)
+            .map(key => networkInterfaces[key])
+            // crux that replaces .flat() as it is not supported in older Node versions (v10 and older)
+            .reduce((acc, val) => acc.concat(val), [])
+            .filter(i => !i.internal || allowInternal)
+            .filter(i => i.family === 'IPv' + family || i.family === family).length > 0;
+
+    return familySupported;
+};
+
+const resolver = (family, hostname, options, callback) => {
+    options = options || {};
+    const familySupported = isFamilySupported(family, options.allowInternalNetworkInterfaces);
+
+    if (!familySupported) {
+        return callback(null, []);
+    }
+
+    const resolver = dns.Resolver ? new dns.Resolver(options) : dns;
+    resolver['resolve' + family](hostname, (err, addresses) => {
+        if (err) {
+            switch (err.code) {
+                case dns.NODATA:
+                case dns.NOTFOUND:
+                case dns.NOTIMP:
+                case dns.SERVFAIL:
+                case dns.CONNREFUSED:
+                case dns.REFUSED:
+                case 'EAI_AGAIN':
+                    return callback(null, []);
+            }
+            return callback(err);
+        }
+        return callback(null, Array.isArray(addresses) ? addresses : [].concat(addresses || []));
+    });
+};
+
+const dnsCache = (module.exports.dnsCache = new Map());
+
+const formatDNSValue = (value, extra) => {
+    if (!value) {
+        return Object.assign({}, extra || {});
+    }
+
+    return Object.assign(
+        {
+            servername: value.servername,
+            host:
+                !value.addresses || !value.addresses.length
+                    ? null
+                    : value.addresses.length === 1
+                    ? value.addresses[0]
+                    : value.addresses[Math.floor(Math.random() * value.addresses.length)]
+        },
+        extra || {}
+    );
+};
+
+module.exports.resolveHostname = (options, callback) => {
+    options = options || {};
+
+    if (!options.host && options.servername) {
+        options.host = options.servername;
+    }
+
+    if (!options.host || net.isIP(options.host)) {
+        // nothing to do here
+        let value = {
+            addresses: [options.host],
+            servername: options.servername || false
+        };
+        return callback(
+            null,
+            formatDNSValue(value, {
+                cached: false
+            })
+        );
+    }
+
+    let cached;
+    if (dnsCache.has(options.host)) {
+        cached = dnsCache.get(options.host);
+
+        if (!cached.expires || cached.expires >= Date.now()) {
+            return callback(
+                null,
+                formatDNSValue(cached.value, {
+                    cached: true
+                })
+            );
+        }
+    }
+
+    resolver(4, options.host, options, (err, addresses) => {
+        if (err) {
+            if (cached) {
+                // ignore error, use expired value
+                return callback(
+                    null,
+                    formatDNSValue(cached.value, {
+                        cached: true,
+                        error: err
+                    })
+                );
+            }
+            return callback(err);
+        }
+
+        if (addresses && addresses.length) {
+            let value = {
+                addresses,
+                servername: options.servername || options.host
+            };
+
+            dnsCache.set(options.host, {
+                value,
+                expires: Date.now() + (options.dnsTtl || DNS_TTL)
+            });
+
+            return callback(
+                null,
+                formatDNSValue(value, {
+                    cached: false
+                })
+            );
+        }
+
+        resolver(6, options.host, options, (err, addresses) => {
+            if (err) {
+                if (cached) {
+                    // ignore error, use expired value
+                    return callback(
+                        null,
+                        formatDNSValue(cached.value, {
+                            cached: true,
+                            error: err
+                        })
+                    );
+                }
+                return callback(err);
+            }
+
+            if (addresses && addresses.length) {
+                let value = {
+                    addresses,
+                    servername: options.servername || options.host
+                };
+
+                dnsCache.set(options.host, {
+                    value,
+                    expires: Date.now() + (options.dnsTtl || DNS_TTL)
+                });
+
+                return callback(
+                    null,
+                    formatDNSValue(value, {
+                        cached: false
+                    })
+                );
+            }
+
+            try {
+                dns.lookup(options.host, { all: true }, (err, addresses) => {
+                    if (err) {
+                        if (cached) {
+                            // ignore error, use expired value
+                            return callback(
+                                null,
+                                formatDNSValue(cached.value, {
+                                    cached: true,
+                                    error: err
+                                })
+                            );
+                        }
+                        return callback(err);
+                    }
+
+                    let address = addresses
+                        ? addresses
+                              .filter(addr => isFamilySupported(addr.family))
+                              .map(addr => addr.address)
+                              .shift()
+                        : false;
+
+                    if (addresses && addresses.length && !address) {
+                        // there are addresses but none can be used
+                        console.warn(`Failed to resolve IPv${addresses[0].family} addresses with current network`);
+                    }
+
+                    if (!address && cached) {
+                        // nothing was found, fallback to cached value
+                        return callback(
+                            null,
+                            formatDNSValue(cached.value, {
+                                cached: true
+                            })
+                        );
+                    }
+
+                    let value = {
+                        addresses: address ? [address] : [options.host],
+                        servername: options.servername || options.host
+                    };
+
+                    dnsCache.set(options.host, {
+                        value,
+                        expires: Date.now() + (options.dnsTtl || DNS_TTL)
+                    });
+
+                    return callback(
+                        null,
+                        formatDNSValue(value, {
+                            cached: false
+                        })
+                    );
+                });
+            } catch (err) {
+                if (cached) {
+                    // ignore error, use expired value
+                    return callback(
+                        null,
+                        formatDNSValue(cached.value, {
+                            cached: true,
+                            error: err
+                        })
+                    );
+                }
+                return callback(err);
+            }
+        });
+    });
+};
+/**
+ * Parses connection url to a structured configuration object
+ *
+ * @param {String} str Connection url
+ * @return {Object} Configuration object
+ */
+module.exports.parseConnectionUrl = str => {
+    str = str || '';
+    let options = {};
+
+    [urllib.parse(str, true)].forEach(url => {
+        let auth;
+
+        switch (url.protocol) {
+            case 'smtp:':
+                options.secure = false;
+                break;
+            case 'smtps:':
+                options.secure = true;
+                break;
+            case 'direct:':
+                options.direct = true;
+                break;
+        }
+
+        if (!isNaN(url.port) && Number(url.port)) {
+            options.port = Number(url.port);
+        }
+
+        if (url.hostname) {
+            options.host = url.hostname;
+        }
+
+        if (url.auth) {
+            auth = url.auth.split(':');
+
+            if (!options.auth) {
+                options.auth = {};
+            }
+
+            options.auth.user = auth.shift();
+            options.auth.pass = auth.join(':');
+        }
+
+        Object.keys(url.query || {}).forEach(key => {
+            let obj = options;
+            let lKey = key;
+            let value = url.query[key];
+
+            if (!isNaN(value)) {
+                value = Number(value);
+            }
+
+            switch (value) {
+                case 'true':
+                    value = true;
+                    break;
+                case 'false':
+                    value = false;
+                    break;
+            }
+
+            // tls is nested object
+            if (key.indexOf('tls.') === 0) {
+                lKey = key.substr(4);
+                if (!options.tls) {
+                    options.tls = {};
+                }
+                obj = options.tls;
+            } else if (key.indexOf('.') >= 0) {
+                // ignore nested properties besides tls
+                return;
+            }
+
+            if (!(lKey in obj)) {
+                obj[lKey] = value;
+            }
+        });
+    });
+
+    return options;
+};
+
+module.exports._logFunc = (logger, level, defaults, data, message, ...args) => {
+    let entry = {};
+
+    Object.keys(defaults || {}).forEach(key => {
+        if (key !== 'level') {
+            entry[key] = defaults[key];
+        }
+    });
+
+    Object.keys(data || {}).forEach(key => {
+        if (key !== 'level') {
+            entry[key] = data[key];
+        }
+    });
+
+    logger[level](entry, message, ...args);
+};
+
+/**
+ * Returns a bunyan-compatible logger interface. Uses either provided logger or
+ * creates a default console logger
+ *
+ * @param {Object} [options] Options object that might include 'logger' value
+ * @return {Object} bunyan compatible logger
+ */
+module.exports.getLogger = (options, defaults) => {
+    options = options || {};
+
+    let response = {};
+    let levels = ['trace', 'debug', 'info', 'warn', 'error', 'fatal'];
+
+    if (!options.logger) {
+        // use vanity logger
+        levels.forEach(level => {
+            response[level] = () => false;
+        });
+        return response;
+    }
+
+    let logger = options.logger;
+
+    if (options.logger === true) {
+        // create console logger
+        logger = createDefaultLogger(levels);
+    }
+
+    levels.forEach(level => {
+        response[level] = (data, message, ...args) => {
+            module.exports._logFunc(logger, level, defaults, data, message, ...args);
+        };
+    });
+
+    return response;
+};
+
+/**
+ * Wrapper for creating a callback that either resolves or rejects a promise
+ * based on input
+ *
+ * @param {Function} resolve Function to run if callback is called
+ * @param {Function} reject Function to run if callback ends with an error
+ */
+module.exports.callbackPromise = (resolve, reject) =>
+    function () {
+        let args = Array.from(arguments);
+        let err = args.shift();
+        if (err) {
+            reject(err);
+        } else {
+            resolve(...args);
+        }
+    };
+
+module.exports.parseDataURI = uri => {
+    let input = uri;
+    let commaPos = input.indexOf(',');
+    if (!commaPos) {
+        return uri;
+    }
+
+    let data = input.substring(commaPos + 1);
+    let metaStr = input.substring('data:'.length, commaPos);
+
+    let encoding;
+
+    let metaEntries = metaStr.split(';');
+    let lastMetaEntry = metaEntries.length > 1 ? metaEntries[metaEntries.length - 1] : false;
+    if (lastMetaEntry && lastMetaEntry.indexOf('=') < 0) {
+        encoding = lastMetaEntry.toLowerCase();
+        metaEntries.pop();
+    }
+
+    let contentType = metaEntries.shift() || 'application/octet-stream';
+    let params = {};
+    for (let entry of metaEntries) {
+        let sep = entry.indexOf('=');
+        if (sep >= 0) {
+            let key = entry.substring(0, sep);
+            let value = entry.substring(sep + 1);
+            params[key] = value;
+        }
+    }
+
+    switch (encoding) {
+        case 'base64':
+            data = Buffer.from(data, 'base64');
+            break;
+        case 'utf8':
+            data = Buffer.from(data);
+            break;
+        default:
+            try {
+                data = Buffer.from(decodeURIComponent(data));
+            } catch (err) {
+                data = Buffer.from(data);
+            }
+            data = Buffer.from(data);
+    }
+
+    return { data, encoding, contentType, params };
+};
+
+/**
+ * Resolves a String or a Buffer value for content value. Useful if the value
+ * is a Stream or a file or an URL. If the value is a Stream, overwrites
+ * the stream object with the resolved value (you can't stream a value twice).
+ *
+ * This is useful when you want to create a plugin that needs a content value,
+ * for example the `html` or `text` value as a String or a Buffer but not as
+ * a file path or an URL.
+ *
+ * @param {Object} data An object or an Array you want to resolve an element for
+ * @param {String|Number} key Property name or an Array index
+ * @param {Function} callback Callback function with (err, value)
+ */
+module.exports.resolveContent = (data, key, callback) => {
+    let promise;
+
+    if (!callback) {
+        promise = new Promise((resolve, reject) => {
+            callback = module.exports.callbackPromise(resolve, reject);
+        });
+    }
+
+    let content = (data && data[key] && data[key].content) || data[key];
+    let contentStream;
+    let encoding = ((typeof data[key] === 'object' && data[key].encoding) || 'utf8')
+        .toString()
+        .toLowerCase()
+        .replace(/[-_\s]/g, '');
+
+    if (!content) {
+        return callback(null, content);
+    }
+
+    if (typeof content === 'object') {
+        if (typeof content.pipe === 'function') {
+            return resolveStream(content, (err, value) => {
+                if (err) {
+                    return callback(err);
+                }
+                // we can't stream twice the same content, so we need
+                // to replace the stream object with the streaming result
+                if (data[key].content) {
+                    data[key].content = value;
+                } else {
+                    data[key] = value;
+                }
+                callback(null, value);
+            });
+        } else if (/^https?:\/\//i.test(content.path || content.href)) {
+            contentStream = nmfetch(content.path || content.href);
+            return resolveStream(contentStream, callback);
+        } else if (/^data:/i.test(content.path || content.href)) {
+            let parsedDataUri = module.exports.parseDataURI(content.path || content.href);
+
+            if (!parsedDataUri || !parsedDataUri.data) {
+                return callback(null, Buffer.from(0));
+            }
+            return callback(null, parsedDataUri.data);
+        } else if (content.path) {
+            return resolveStream(fs.createReadStream(content.path), callback);
+        }
+    }
+
+    if (typeof data[key].content === 'string' && !['utf8', 'usascii', 'ascii'].includes(encoding)) {
+        content = Buffer.from(data[key].content, encoding);
+    }
+
+    // default action, return as is
+    setImmediate(() => callback(null, content));
+
+    return promise;
+};
+
+/**
+ * Copies properties from source objects to target objects
+ */
+module.exports.assign = function (/* target, ... sources */) {
+    let args = Array.from(arguments);
+    let target = args.shift() || {};
+
+    args.forEach(source => {
+        Object.keys(source || {}).forEach(key => {
+            if (['tls', 'auth'].includes(key) && source[key] && typeof source[key] === 'object') {
+                // tls and auth are special keys that need to be enumerated separately
+                // other objects are passed as is
+                if (!target[key]) {
+                    // ensure that target has this key
+                    target[key] = {};
+                }
+                Object.keys(source[key]).forEach(subKey => {
+                    target[key][subKey] = source[key][subKey];
+                });
+            } else {
+                target[key] = source[key];
+            }
+        });
+    });
+    return target;
+};
+
+module.exports.encodeXText = str => {
+    // ! 0x21
+    // + 0x2B
+    // = 0x3D
+    // ~ 0x7E
+    if (!/[^\x21-\x2A\x2C-\x3C\x3E-\x7E]/.test(str)) {
+        return str;
+    }
+    let buf = Buffer.from(str);
+    let result = '';
+    for (let i = 0, len = buf.length; i < len; i++) {
+        let c = buf[i];
+        if (c < 0x21 || c > 0x7e || c === 0x2b || c === 0x3d) {
+            result += '+' + (c < 0x10 ? '0' : '') + c.toString(16).toUpperCase();
+        } else {
+            result += String.fromCharCode(c);
+        }
+    }
+    return result;
+};
+
+/**
+ * Streams a stream value into a Buffer
+ *
+ * @param {Object} stream Readable stream
+ * @param {Function} callback Callback function with (err, value)
+ */
+function resolveStream(stream, callback) {
+    let responded = false;
+    let chunks = [];
+    let chunklen = 0;
+
+    stream.on('error', err => {
+        if (responded) {
+            return;
+        }
+
+        responded = true;
+        callback(err);
+    });
+
+    stream.on('readable', () => {
+        let chunk;
+        while ((chunk = stream.read()) !== null) {
+            chunks.push(chunk);
+            chunklen += chunk.length;
+        }
+    });
+
+    stream.on('end', () => {
+        if (responded) {
+            return;
+        }
+        responded = true;
+
+        let value;
+
+        try {
+            value = Buffer.concat(chunks, chunklen);
+        } catch (E) {
+            return callback(E);
+        }
+        callback(null, value);
+    });
+}
+
+/**
+ * Generates a bunyan-like logger that prints to console
+ *
+ * @returns {Object} Bunyan logger instance
+ */
+function createDefaultLogger(levels) {
+    let levelMaxLen = 0;
+    let levelNames = new Map();
+    levels.forEach(level => {
+        if (level.length > levelMaxLen) {
+            levelMaxLen = level.length;
+        }
+    });
+
+    levels.forEach(level => {
+        let levelName = level.toUpperCase();
+        if (levelName.length < levelMaxLen) {
+            levelName += ' '.repeat(levelMaxLen - levelName.length);
+        }
+        levelNames.set(level, levelName);
+    });
+
+    let print = (level, entry, message, ...args) => {
+        let prefix = '';
+        if (entry) {
+            if (entry.tnx === 'server') {
+                prefix = 'S: ';
+            } else if (entry.tnx === 'client') {
+                prefix = 'C: ';
+            }
+
+            if (entry.sid) {
+                prefix = '[' + entry.sid + '] ' + prefix;
+            }
+
+            if (entry.cid) {
+                prefix = '[#' + entry.cid + '] ' + prefix;
+            }
+        }
+
+        message = util.format(message, ...args);
+        message.split(/\r?\n/).forEach(line => {
+            console.log('[%s] %s %s', new Date().toISOString().substr(0, 19).replace(/T/, ' '), levelNames.get(level), prefix + line);
+        });
+    };
+
+    let logger = {};
+    levels.forEach(level => {
+        logger[level] = print.bind(null, level);
+    });
+
+    return logger;
+}

backend/apis/nodejs/node_modules/nodemailer/lib/smtp-connection/data-stream.js

@@ -0,0 +1,108 @@
+'use strict';
+
+const stream = require('stream');
+const Transform = stream.Transform;
+
+/**
+ * Escapes dots in the beginning of lines. Ends the stream with <CR><LF>.<CR><LF>
+ * Also makes sure that only <CR><LF> sequences are used for linebreaks
+ *
+ * @param {Object} options Stream options
+ */
+class DataStream extends Transform {
+    constructor(options) {
+        super(options);
+        // init Transform
+        this.options = options || {};
+        this._curLine = '';
+
+        this.inByteCount = 0;
+        this.outByteCount = 0;
+        this.lastByte = false;
+    }
+
+    /**
+     * Escapes dots
+     */
+    _transform(chunk, encoding, done) {
+        let chunks = [];
+        let chunklen = 0;
+        let i,
+            len,
+            lastPos = 0;
+        let buf;
+
+        if (!chunk || !chunk.length) {
+            return done();
+        }
+
+        if (typeof chunk === 'string') {
+            chunk = Buffer.from(chunk);
+        }
+
+        this.inByteCount += chunk.length;
+
+        for (i = 0, len = chunk.length; i < len; i++) {
+            if (chunk[i] === 0x2e) {
+                // .
+                if ((i && chunk[i - 1] === 0x0a) || (!i && (!this.lastByte || this.lastByte === 0x0a))) {
+                    buf = chunk.slice(lastPos, i + 1);
+                    chunks.push(buf);
+                    chunks.push(Buffer.from('.'));
+                    chunklen += buf.length + 1;
+                    lastPos = i + 1;
+                }
+            } else if (chunk[i] === 0x0a) {
+                // .
+                if ((i && chunk[i - 1] !== 0x0d) || (!i && this.lastByte !== 0x0d)) {
+                    if (i > lastPos) {
+                        buf = chunk.slice(lastPos, i);
+                        chunks.push(buf);
+                        chunklen += buf.length + 2;
+                    } else {
+                        chunklen += 2;
+                    }
+                    chunks.push(Buffer.from('\r\n'));
+                    lastPos = i + 1;
+                }
+            }
+        }
+
+        if (chunklen) {
+            // add last piece
+            if (lastPos < chunk.length) {
+                buf = chunk.slice(lastPos);
+                chunks.push(buf);
+                chunklen += buf.length;
+            }
+
+            this.outByteCount += chunklen;
+            this.push(Buffer.concat(chunks, chunklen));
+        } else {
+            this.outByteCount += chunk.length;
+            this.push(chunk);
+        }
+
+        this.lastByte = chunk[chunk.length - 1];
+        done();
+    }
+
+    /**
+     * Finalizes the stream with a dot on a single line
+     */
+    _flush(done) {
+        let buf;
+        if (this.lastByte === 0x0a) {
+            buf = Buffer.from('.\r\n');
+        } else if (this.lastByte === 0x0d) {
+            buf = Buffer.from('\n.\r\n');
+        } else {
+            buf = Buffer.from('\r\n.\r\n');
+        }
+        this.outByteCount += buf.length;
+        this.push(buf);
+        done();
+    }
+}
+
+module.exports = DataStream;

backend/apis/nodejs/node_modules/nodemailer/lib/smtp-connection/http-proxy-client.js

@@ -0,0 +1,143 @@
+'use strict';
+
+/**
+ * Minimal HTTP/S proxy client
+ */
+
+const net = require('net');
+const tls = require('tls');
+const urllib = require('url');
+
+/**
+ * Establishes proxied connection to destinationPort
+ *
+ * httpProxyClient("http://localhost:3128/", 80, "google.com", function(err, socket){
+ *     socket.write("GET / HTTP/1.0\r\n\r\n");
+ * });
+ *
+ * @param {String} proxyUrl proxy configuration, etg "http://proxy.host:3128/"
+ * @param {Number} destinationPort Port to open in destination host
+ * @param {String} destinationHost Destination hostname
+ * @param {Function} callback Callback to run with the rocket object once connection is established
+ */
+function httpProxyClient(proxyUrl, destinationPort, destinationHost, callback) {
+    let proxy = urllib.parse(proxyUrl);
+
+    // create a socket connection to the proxy server
+    let options;
+    let connect;
+    let socket;
+
+    options = {
+        host: proxy.hostname,
+        port: Number(proxy.port) ? Number(proxy.port) : proxy.protocol === 'https:' ? 443 : 80
+    };
+
+    if (proxy.protocol === 'https:') {
+        // we can use untrusted proxies as long as we verify actual SMTP certificates
+        options.rejectUnauthorized = false;
+        connect = tls.connect.bind(tls);
+    } else {
+        connect = net.connect.bind(net);
+    }
+
+    // Error harness for initial connection. Once connection is established, the responsibility
+    // to handle errors is passed to whoever uses this socket
+    let finished = false;
+    let tempSocketErr = err => {
+        if (finished) {
+            return;
+        }
+        finished = true;
+        try {
+            socket.destroy();
+        } catch (E) {
+            // ignore
+        }
+        callback(err);
+    };
+
+    let timeoutErr = () => {
+        let err = new Error('Proxy socket timed out');
+        err.code = 'ETIMEDOUT';
+        tempSocketErr(err);
+    };
+
+    socket = connect(options, () => {
+        if (finished) {
+            return;
+        }
+
+        let reqHeaders = {
+            Host: destinationHost + ':' + destinationPort,
+            Connection: 'close'
+        };
+        if (proxy.auth) {
+            reqHeaders['Proxy-Authorization'] = 'Basic ' + Buffer.from(proxy.auth).toString('base64');
+        }
+
+        socket.write(
+            // HTTP method
+            'CONNECT ' +
+                destinationHost +
+                ':' +
+                destinationPort +
+                ' HTTP/1.1\r\n' +
+                // HTTP request headers
+                Object.keys(reqHeaders)
+                    .map(key => key + ': ' + reqHeaders[key])
+                    .join('\r\n') +
+                // End request
+                '\r\n\r\n'
+        );
+
+        let headers = '';
+        let onSocketData = chunk => {
+            let match;
+            let remainder;
+
+            if (finished) {
+                return;
+            }
+
+            headers += chunk.toString('binary');
+            if ((match = headers.match(/\r\n\r\n/))) {
+                socket.removeListener('data', onSocketData);
+
+                remainder = headers.substr(match.index + match[0].length);
+                headers = headers.substr(0, match.index);
+                if (remainder) {
+                    socket.unshift(Buffer.from(remainder, 'binary'));
+                }
+
+                // proxy connection is now established
+                finished = true;
+
+                // check response code
+                match = headers.match(/^HTTP\/\d+\.\d+ (\d+)/i);
+                if (!match || (match[1] || '').charAt(0) !== '2') {
+                    try {
+                        socket.destroy();
+                    } catch (E) {
+                        // ignore
+                    }
+                    return callback(new Error('Invalid response from proxy' + ((match && ': ' + match[1]) || '')));
+                }
+
+                socket.removeListener('error', tempSocketErr);
+                socket.removeListener('timeout', timeoutErr);
+                socket.setTimeout(0);
+
+                return callback(null, socket);
+            }
+        };
+        socket.on('data', onSocketData);
+    });
+
+    socket.setTimeout(httpProxyClient.timeout || 30 * 1000);
+    socket.on('timeout', timeoutErr);
+
+    socket.once('error', tempSocketErr);
+}
+
+module.exports = httpProxyClient;

backend/apis/nodejs/node_modules/nodemailer/lib/smtp-pool/index.js

@@ -0,0 +1,648 @@
+'use strict';
+
+const EventEmitter = require('events');
+const PoolResource = require('./pool-resource');
+const SMTPConnection = require('../smtp-connection');
+const wellKnown = require('../well-known');
+const shared = require('../shared');
+const packageData = require('../../package.json');
+
+/**
+ * Creates a SMTP pool transport object for Nodemailer
+ *
+ * @constructor
+ * @param {Object} options SMTP Connection options
+ */
+class SMTPPool extends EventEmitter {
+    constructor(options) {
+        super();
+
+        options = options || {};
+        if (typeof options === 'string') {
+            options = {
+                url: options
+            };
+        }
+
+        let urlData;
+        let service = options.service;
+
+        if (typeof options.getSocket === 'function') {
+            this.getSocket = options.getSocket;
+        }
+
+        if (options.url) {
+            urlData = shared.parseConnectionUrl(options.url);
+            service = service || urlData.service;
+        }
+
+        this.options = shared.assign(
+            false, // create new object
+            options, // regular options
+            urlData, // url options
+            service && wellKnown(service) // wellknown options
+        );
+
+        this.options.maxConnections = this.options.maxConnections || 5;
+        this.options.maxMessages = this.options.maxMessages || 100;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'smtp-pool'
+        });
+
+        // temporary object
+        let connection = new SMTPConnection(this.options);
+
+        this.name = 'SMTP (pool)';
+        this.version = packageData.version + '[client:' + connection.version + ']';
+
+        this._rateLimit = {
+            counter: 0,
+            timeout: null,
+            waiting: [],
+            checkpoint: false,
+            delta: Number(this.options.rateDelta) || 1000,
+            limit: Number(this.options.rateLimit) || 0
+        };
+        this._closed = false;
+        this._queue = [];
+        this._connections = [];
+        this._connectionCounter = 0;
+
+        this.idling = true;
+
+        setImmediate(() => {
+            if (this.idling) {
+                this.emit('idle');
+            }
+        });
+    }
+
+    /**
+     * Placeholder function for creating proxy sockets. This method immediatelly returns
+     * without a socket
+     *
+     * @param {Object} options Connection options
+     * @param {Function} callback Callback function to run with the socket keys
+     */
+    getSocket(options, callback) {
+        // return immediatelly
+        return setImmediate(() => callback(null, false));
+    }
+
+    /**
+     * Queues an e-mail to be sent using the selected settings
+     *
+     * @param {Object} mail Mail object
+     * @param {Function} callback Callback function
+     */
+    send(mail, callback) {
+        if (this._closed) {
+            return false;
+        }
+
+        this._queue.push({
+            mail,
+            requeueAttempts: 0,
+            callback
+        });
+
+        if (this.idling && this._queue.length >= this.options.maxConnections) {
+            this.idling = false;
+        }
+
+        setImmediate(() => this._processMessages());
+
+        return true;
+    }
+
+    /**
+     * Closes all connections in the pool. If there is a message being sent, the connection
+     * is closed later
+     */
+    close() {
+        let connection;
+        let len = this._connections.length;
+        this._closed = true;
+
+        // clear rate limit timer if it exists
+        clearTimeout(this._rateLimit.timeout);
+
+        if (!len && !this._queue.length) {
+            return;
+        }
+
+        // remove all available connections
+        for (let i = len - 1; i >= 0; i--) {
+            if (this._connections[i] && this._connections[i].available) {
+                connection = this._connections[i];
+                connection.close();
+                this.logger.info(
+                    {
+                        tnx: 'connection',
+                        cid: connection.id,
+                        action: 'removed'
+                    },
+                    'Connection #%s removed',
+                    connection.id
+                );
+            }
+        }
+
+        if (len && !this._connections.length) {
+            this.logger.debug(
+                {
+                    tnx: 'connection'
+                },
+                'All connections removed'
+            );
+        }
+
+        if (!this._queue.length) {
+            return;
+        }
+
+        // make sure that entire queue would be cleaned
+        let invokeCallbacks = () => {
+            if (!this._queue.length) {
+                this.logger.debug(
+                    {
+                        tnx: 'connection'
+                    },
+                    'Pending queue entries cleared'
+                );
+                return;
+            }
+            let entry = this._queue.shift();
+            if (entry && typeof entry.callback === 'function') {
+                try {
+                    entry.callback(new Error('Connection pool was closed'));
+                } catch (E) {
+                    this.logger.error(
+                        {
+                            err: E,
+                            tnx: 'callback',
+                            cid: connection.id
+                        },
+                        'Callback error for #%s: %s',
+                        connection.id,
+                        E.message
+                    );
+                }
+            }
+            setImmediate(invokeCallbacks);
+        };
+        setImmediate(invokeCallbacks);
+    }
+
+    /**
+     * Check the queue and available connections. If there is a message to be sent and there is
+     * an available connection, then use this connection to send the mail
+     */
+    _processMessages() {
+        let connection;
+        let i, len;
+
+        // do nothing if already closed
+        if (this._closed) {
+            return;
+        }
+
+        // do nothing if queue is empty
+        if (!this._queue.length) {
+            if (!this.idling) {
+                // no pending jobs
+                this.idling = true;
+                this.emit('idle');
+            }
+            return;
+        }
+
+        // find first available connection
+        for (i = 0, len = this._connections.length; i < len; i++) {
+            if (this._connections[i].available) {
+                connection = this._connections[i];
+                break;
+            }
+        }
+
+        if (!connection && this._connections.length < this.options.maxConnections) {
+            connection = this._createConnection();
+        }
+
+        if (!connection) {
+            // no more free connection slots available
+            this.idling = false;
+            return;
+        }
+
+        // check if there is free space in the processing queue
+        if (!this.idling && this._queue.length < this.options.maxConnections) {
+            this.idling = true;
+            this.emit('idle');
+        }
+
+        let entry = (connection.queueEntry = this._queue.shift());
+        entry.messageId = (connection.queueEntry.mail.message.getHeader('message-id') || '').replace(/[<>\s]/g, '');
+
+        connection.available = false;
+
+        this.logger.debug(
+            {
+                tnx: 'pool',
+                cid: connection.id,
+                messageId: entry.messageId,
+                action: 'assign'
+            },
+            'Assigned message <%s> to #%s (%s)',
+            entry.messageId,
+            connection.id,
+            connection.messages + 1
+        );
+
+        if (this._rateLimit.limit) {
+            this._rateLimit.counter++;
+            if (!this._rateLimit.checkpoint) {
+                this._rateLimit.checkpoint = Date.now();
+            }
+        }
+
+        connection.send(entry.mail, (err, info) => {
+            // only process callback if current handler is not changed
+            if (entry === connection.queueEntry) {
+                try {
+                    entry.callback(err, info);
+                } catch (E) {
+                    this.logger.error(
+                        {
+                            err: E,
+                            tnx: 'callback',
+                            cid: connection.id
+                        },
+                        'Callback error for #%s: %s',
+                        connection.id,
+                        E.message
+                    );
+                }
+                connection.queueEntry = false;
+            }
+        });
+    }
+
+    /**
+     * Creates a new pool resource
+     */
+    _createConnection() {
+        let connection = new PoolResource(this);
+
+        connection.id = ++this._connectionCounter;
+
+        this.logger.info(
+            {
+                tnx: 'pool',
+                cid: connection.id,
+                action: 'conection'
+            },
+            'Created new pool resource #%s',
+            connection.id
+        );
+
+        // resource comes available
+        connection.on('available', () => {
+            this.logger.debug(
+                {
+                    tnx: 'connection',
+                    cid: connection.id,
+                    action: 'available'
+                },
+                'Connection #%s became available',
+                connection.id
+            );
+
+            if (this._closed) {
+                // if already closed run close() that will remove this connections from connections list
+                this.close();
+            } else {
+                // check if there's anything else to send
+                this._processMessages();
+            }
+        });
+
+        // resource is terminated with an error
+        connection.once('error', err => {
+            if (err.code !== 'EMAXLIMIT') {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'pool',
+                        cid: connection.id
+                    },
+                    'Pool Error for #%s: %s',
+                    connection.id,
+                    err.message
+                );
+            } else {
+                this.logger.debug(
+                    {
+                        tnx: 'pool',
+                        cid: connection.id,
+                        action: 'maxlimit'
+                    },
+                    'Max messages limit exchausted for #%s',
+                    connection.id
+                );
+            }
+
+            if (connection.queueEntry) {
+                try {
+                    connection.queueEntry.callback(err);
+                } catch (E) {
+                    this.logger.error(
+                        {
+                            err: E,
+                            tnx: 'callback',
+                            cid: connection.id
+                        },
+                        'Callback error for #%s: %s',
+                        connection.id,
+                        E.message
+                    );
+                }
+                connection.queueEntry = false;
+            }
+
+            // remove the erroneus connection from connections list
+            this._removeConnection(connection);
+
+            this._continueProcessing();
+        });
+
+        connection.once('close', () => {
+            this.logger.info(
+                {
+                    tnx: 'connection',
+                    cid: connection.id,
+                    action: 'closed'
+                },
+                'Connection #%s was closed',
+                connection.id
+            );
+
+            this._removeConnection(connection);
+
+            if (connection.queueEntry) {
+                // If the connection closed when sending, add the message to the queue again
+                // if max number of requeues is not reached yet
+                // Note that we must wait a bit.. because the callback of the 'error' handler might be called
+                // in the next event loop
+                setTimeout(() => {
+                    if (connection.queueEntry) {
+                        if (this._shouldRequeuOnConnectionClose(connection.queueEntry)) {
+                            this._requeueEntryOnConnectionClose(connection);
+                        } else {
+                            this._failDeliveryOnConnectionClose(connection);
+                        }
+                    }
+                    this._continueProcessing();
+                }, 50);
+            } else {
+                this._continueProcessing();
+            }
+        });
+
+        this._connections.push(connection);
+
+        return connection;
+    }
+
+    _shouldRequeuOnConnectionClose(queueEntry) {
+        if (this.options.maxRequeues === undefined || this.options.maxRequeues < 0) {
+            return true;
+        }
+
+        return queueEntry.requeueAttempts < this.options.maxRequeues;
+    }
+
+    _failDeliveryOnConnectionClose(connection) {
+        if (connection.queueEntry && connection.queueEntry.callback) {
+            try {
+                connection.queueEntry.callback(new Error('Reached maximum number of retries after connection was closed'));
+            } catch (E) {
+                this.logger.error(
+                    {
+                        err: E,
+                        tnx: 'callback',
+                        messageId: connection.queueEntry.messageId,
+                        cid: connection.id
+                    },
+                    'Callback error for #%s: %s',
+                    connection.id,
+                    E.message
+                );
+            }
+            connection.queueEntry = false;
+        }
+    }
+
+    _requeueEntryOnConnectionClose(connection) {
+        connection.queueEntry.requeueAttempts = connection.queueEntry.requeueAttempts + 1;
+        this.logger.debug(
+            {
+                tnx: 'pool',
+                cid: connection.id,
+                messageId: connection.queueEntry.messageId,
+                action: 'requeue'
+            },
+            'Re-queued message <%s> for #%s. Attempt: #%s',
+            connection.queueEntry.messageId,
+            connection.id,
+            connection.queueEntry.requeueAttempts
+        );
+        this._queue.unshift(connection.queueEntry);
+        connection.queueEntry = false;
+    }
+
+    /**
+     * Continue to process message if the pool hasn't closed
+     */
+    _continueProcessing() {
+        if (this._closed) {
+            this.close();
+        } else {
+            setTimeout(() => this._processMessages(), 100);
+        }
+    }
+
+    /**
+     * Remove resource from pool
+     *
+     * @param {Object} connection The PoolResource to remove
+     */
+    _removeConnection(connection) {
+        let index = this._connections.indexOf(connection);
+
+        if (index !== -1) {
+            this._connections.splice(index, 1);
+        }
+    }
+
+    /**
+     * Checks if connections have hit current rate limit and if so, queues the availability callback
+     *
+     * @param {Function} callback Callback function to run once rate limiter has been cleared
+     */
+    _checkRateLimit(callback) {
+        if (!this._rateLimit.limit) {
+            return callback();
+        }
+
+        let now = Date.now();
+
+        if (this._rateLimit.counter < this._rateLimit.limit) {
+            return callback();
+        }
+
+        this._rateLimit.waiting.push(callback);
+
+        if (this._rateLimit.checkpoint <= now - this._rateLimit.delta) {
+            return this._clearRateLimit();
+        } else if (!this._rateLimit.timeout) {
+            this._rateLimit.timeout = setTimeout(() => this._clearRateLimit(), this._rateLimit.delta - (now - this._rateLimit.checkpoint));
+            this._rateLimit.checkpoint = now;
+        }
+    }
+
+    /**
+     * Clears current rate limit limitation and runs paused callback
+     */
+    _clearRateLimit() {
+        clearTimeout(this._rateLimit.timeout);
+        this._rateLimit.timeout = null;
+        this._rateLimit.counter = 0;
+        this._rateLimit.checkpoint = false;
+
+        // resume all paused connections
+        while (this._rateLimit.waiting.length) {
+            let cb = this._rateLimit.waiting.shift();
+            setImmediate(cb);
+        }
+    }
+
+    /**
+     * Returns true if there are free slots in the queue
+     */
+    isIdle() {
+        return this.idling;
+    }
+
+    /**
+     * Verifies SMTP configuration
+     *
+     * @param {Function} callback Callback function
+     */
+    verify(callback) {
+        let promise;
+
+        if (!callback) {
+            promise = new Promise((resolve, reject) => {
+                callback = shared.callbackPromise(resolve, reject);
+            });
+        }
+
+        let auth = new PoolResource(this).auth;
+
+        this.getSocket(this.options, (err, socketOptions) => {
+            if (err) {
+                return callback(err);
+            }
+
+            let options = this.options;
+            if (socketOptions && socketOptions.connection) {
+                this.logger.info(
+                    {
+                        tnx: 'proxy',
+                        remoteAddress: socketOptions.connection.remoteAddress,
+                        remotePort: socketOptions.connection.remotePort,
+                        destHost: options.host || '',
+                        destPort: options.port || '',
+                        action: 'connected'
+                    },
+                    'Using proxied socket from %s:%s to %s:%s',
+                    socketOptions.connection.remoteAddress,
+                    socketOptions.connection.remotePort,
+                    options.host || '',
+                    options.port || ''
+                );
+                options = shared.assign(false, options);
+                Object.keys(socketOptions).forEach(key => {
+                    options[key] = socketOptions[key];
+                });
+            }
+
+            let connection = new SMTPConnection(options);
+            let returned = false;
+
+            connection.once('error', err => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                connection.close();
+                return callback(err);
+            });
+
+            connection.once('end', () => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                return callback(new Error('Connection closed'));
+            });
+
+            let finalize = () => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                connection.quit();
+                return callback(null, true);
+            };
+
+            connection.connect(() => {
+                if (returned) {
+                    return;
+                }
+
+                if (auth && (connection.allowsAuth || options.forceAuth)) {
+                    connection.login(auth, err => {
+                        if (returned) {
+                            return;
+                        }
+
+                        if (err) {
+                            returned = true;
+                            connection.close();
+                            return callback(err);
+                        }
+
+                        finalize();
+                    });
+                } else if (!auth && connection.allowsAuth && options.forceAuth) {
+                    let err = new Error('Authentication info was not provided');
+                    err.code = 'NoAuth';
+
+                    returned = true;
+                    connection.close();
+                    return callback(err);
+                } else {
+                    finalize();
+                }
+            });
+        });
+
+        return promise;
+    }
+}
+
+// expose to the world
+module.exports = SMTPPool;

backend/apis/nodejs/node_modules/nodemailer/lib/smtp-pool/pool-resource.js

@@ -0,0 +1,253 @@
+'use strict';
+
+const SMTPConnection = require('../smtp-connection');
+const assign = require('../shared').assign;
+const XOAuth2 = require('../xoauth2');
+const EventEmitter = require('events');
+
+/**
+ * Creates an element for the pool
+ *
+ * @constructor
+ * @param {Object} options SMTPPool instance
+ */
+class PoolResource extends EventEmitter {
+    constructor(pool) {
+        super();
+
+        this.pool = pool;
+        this.options = pool.options;
+        this.logger = this.pool.logger;
+
+        if (this.options.auth) {
+            switch ((this.options.auth.type || '').toString().toUpperCase()) {
+                case 'OAUTH2': {
+                    let oauth2 = new XOAuth2(this.options.auth, this.logger);
+                    oauth2.provisionCallback = (this.pool.mailer && this.pool.mailer.get('oauth2_provision_cb')) || oauth2.provisionCallback;
+                    this.auth = {
+                        type: 'OAUTH2',
+                        user: this.options.auth.user,
+                        oauth2,
+                        method: 'XOAUTH2'
+                    };
+                    oauth2.on('token', token => this.pool.mailer.emit('token', token));
+                    oauth2.on('error', err => this.emit('error', err));
+                    break;
+                }
+                default:
+                    if (!this.options.auth.user && !this.options.auth.pass) {
+                        break;
+                    }
+                    this.auth = {
+                        type: (this.options.auth.type || '').toString().toUpperCase() || 'LOGIN',
+                        user: this.options.auth.user,
+                        credentials: {
+                            user: this.options.auth.user || '',
+                            pass: this.options.auth.pass,
+                            options: this.options.auth.options
+                        },
+                        method: (this.options.auth.method || '').trim().toUpperCase() || this.options.authMethod || false
+                    };
+            }
+        }
+
+        this._connection = false;
+        this._connected = false;
+
+        this.messages = 0;
+        this.available = true;
+    }
+
+    /**
+     * Initiates a connection to the SMTP server
+     *
+     * @param {Function} callback Callback function to run once the connection is established or failed
+     */
+    connect(callback) {
+        this.pool.getSocket(this.options, (err, socketOptions) => {
+            if (err) {
+                return callback(err);
+            }
+
+            let returned = false;
+            let options = this.options;
+            if (socketOptions && socketOptions.connection) {
+                this.logger.info(
+                    {
+                        tnx: 'proxy',
+                        remoteAddress: socketOptions.connection.remoteAddress,
+                        remotePort: socketOptions.connection.remotePort,
+                        destHost: options.host || '',
+                        destPort: options.port || '',
+                        action: 'connected'
+                    },
+                    'Using proxied socket from %s:%s to %s:%s',
+                    socketOptions.connection.remoteAddress,
+                    socketOptions.connection.remotePort,
+                    options.host || '',
+                    options.port || ''
+                );
+
+                options = assign(false, options);
+                Object.keys(socketOptions).forEach(key => {
+                    options[key] = socketOptions[key];
+                });
+            }
+
+            this.connection = new SMTPConnection(options);
+
+            this.connection.once('error', err => {
+                this.emit('error', err);
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                return callback(err);
+            });
+
+            this.connection.once('end', () => {
+                this.close();
+                if (returned) {
+                    return;
+                }
+                returned = true;
+
+                let timer = setTimeout(() => {
+                    if (returned) {
+                        return;
+                    }
+                    // still have not returned, this means we have an unexpected connection close
+                    let err = new Error('Unexpected socket close');
+                    if (this.connection && this.connection._socket && this.connection._socket.upgrading) {
+                        // starttls connection errors
+                        err.code = 'ETLS';
+                    }
+                    callback(err);
+                }, 1000);
+
+                try {
+                    timer.unref();
+                } catch (E) {
+                    // Ignore. Happens on envs with non-node timer implementation
+                }
+            });
+
+            this.connection.connect(() => {
+                if (returned) {
+                    return;
+                }
+
+                if (this.auth && (this.connection.allowsAuth || options.forceAuth)) {
+                    this.connection.login(this.auth, err => {
+                        if (returned) {
+                            return;
+                        }
+                        returned = true;
+
+                        if (err) {
+                            this.connection.close();
+                            this.emit('error', err);
+                            return callback(err);
+                        }
+
+                        this._connected = true;
+                        callback(null, true);
+                    });
+                } else {
+                    returned = true;
+                    this._connected = true;
+                    return callback(null, true);
+                }
+            });
+        });
+    }
+
+    /**
+     * Sends an e-mail to be sent using the selected settings
+     *
+     * @param {Object} mail Mail object
+     * @param {Function} callback Callback function
+     */
+    send(mail, callback) {
+        if (!this._connected) {
+            return this.connect(err => {
+                if (err) {
+                    return callback(err);
+                }
+                return this.send(mail, callback);
+            });
+        }
+
+        let envelope = mail.message.getEnvelope();
+        let messageId = mail.message.messageId();
+
+        let recipients = [].concat(envelope.to || []);
+        if (recipients.length > 3) {
+            recipients.push('...and ' + recipients.splice(2).length + ' more');
+        }
+        this.logger.info(
+            {
+                tnx: 'send',
+                messageId,
+                cid: this.id
+            },
+            'Sending message %s using #%s to <%s>',
+            messageId,
+            this.id,
+            recipients.join(', ')
+        );
+
+        if (mail.data.dsn) {
+            envelope.dsn = mail.data.dsn;
+        }
+
+        this.connection.send(envelope, mail.message.createReadStream(), (err, info) => {
+            this.messages++;
+
+            if (err) {
+                this.connection.close();
+                this.emit('error', err);
+                return callback(err);
+            }
+
+            info.envelope = {
+                from: envelope.from,
+                to: envelope.to
+            };
+            info.messageId = messageId;
+
+            setImmediate(() => {
+                let err;
+                if (this.messages >= this.options.maxMessages) {
+                    err = new Error('Resource exhausted');
+                    err.code = 'EMAXLIMIT';
+                    this.connection.close();
+                    this.emit('error', err);
+                } else {
+                    this.pool._checkRateLimit(() => {
+                        this.available = true;
+                        this.emit('available');
+                    });
+                }
+            });
+
+            callback(null, info);
+        });
+    }
+
+    /**
+     * Closes the connection
+     */
+    close() {
+        this._connected = false;
+        if (this.auth && this.auth.oauth2) {
+            this.auth.oauth2.removeAllListeners();
+        }
+        if (this.connection) {
+            this.connection.close();
+        }
+        this.emit('close');
+    }
+}
+
+module.exports = PoolResource;

backend/apis/nodejs/node_modules/nodemailer/lib/smtp-transport/index.js

@@ -0,0 +1,416 @@
+'use strict';
+
+const EventEmitter = require('events');
+const SMTPConnection = require('../smtp-connection');
+const wellKnown = require('../well-known');
+const shared = require('../shared');
+const XOAuth2 = require('../xoauth2');
+const packageData = require('../../package.json');
+
+/**
+ * Creates a SMTP transport object for Nodemailer
+ *
+ * @constructor
+ * @param {Object} options Connection options
+ */
+class SMTPTransport extends EventEmitter {
+    constructor(options) {
+        super();
+
+        options = options || {};
+
+        if (typeof options === 'string') {
+            options = {
+                url: options
+            };
+        }
+
+        let urlData;
+        let service = options.service;
+
+        if (typeof options.getSocket === 'function') {
+            this.getSocket = options.getSocket;
+        }
+
+        if (options.url) {
+            urlData = shared.parseConnectionUrl(options.url);
+            service = service || urlData.service;
+        }
+
+        this.options = shared.assign(
+            false, // create new object
+            options, // regular options
+            urlData, // url options
+            service && wellKnown(service) // wellknown options
+        );
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'smtp-transport'
+        });
+
+        // temporary object
+        let connection = new SMTPConnection(this.options);
+
+        this.name = 'SMTP';
+        this.version = packageData.version + '[client:' + connection.version + ']';
+
+        if (this.options.auth) {
+            this.auth = this.getAuth({});
+        }
+    }
+
+    /**
+     * Placeholder function for creating proxy sockets. This method immediatelly returns
+     * without a socket
+     *
+     * @param {Object} options Connection options
+     * @param {Function} callback Callback function to run with the socket keys
+     */
+    getSocket(options, callback) {
+        // return immediatelly
+        return setImmediate(() => callback(null, false));
+    }
+
+    getAuth(authOpts) {
+        if (!authOpts) {
+            return this.auth;
+        }
+
+        let hasAuth = false;
+        let authData = {};
+
+        if (this.options.auth && typeof this.options.auth === 'object') {
+            Object.keys(this.options.auth).forEach(key => {
+                hasAuth = true;
+                authData[key] = this.options.auth[key];
+            });
+        }
+
+        if (authOpts && typeof authOpts === 'object') {
+            Object.keys(authOpts).forEach(key => {
+                hasAuth = true;
+                authData[key] = authOpts[key];
+            });
+        }
+
+        if (!hasAuth) {
+            return false;
+        }
+
+        switch ((authData.type || '').toString().toUpperCase()) {
+            case 'OAUTH2': {
+                if (!authData.service && !authData.user) {
+                    return false;
+                }
+                let oauth2 = new XOAuth2(authData, this.logger);
+                oauth2.provisionCallback = (this.mailer && this.mailer.get('oauth2_provision_cb')) || oauth2.provisionCallback;
+                oauth2.on('token', token => this.mailer.emit('token', token));
+                oauth2.on('error', err => this.emit('error', err));
+                return {
+                    type: 'OAUTH2',
+                    user: authData.user,
+                    oauth2,
+                    method: 'XOAUTH2'
+                };
+            }
+            default:
+                return {
+                    type: (authData.type || '').toString().toUpperCase() || 'LOGIN',
+                    user: authData.user,
+                    credentials: {
+                        user: authData.user || '',
+                        pass: authData.pass,
+                        options: authData.options
+                    },
+                    method: (authData.method || '').trim().toUpperCase() || this.options.authMethod || false
+                };
+        }
+    }
+
+    /**
+     * Sends an e-mail using the selected settings
+     *
+     * @param {Object} mail Mail object
+     * @param {Function} callback Callback function
+     */
+    send(mail, callback) {
+        this.getSocket(this.options, (err, socketOptions) => {
+            if (err) {
+                return callback(err);
+            }
+
+            let returned = false;
+            let options = this.options;
+            if (socketOptions && socketOptions.connection) {
+                this.logger.info(
+                    {
+                        tnx: 'proxy',
+                        remoteAddress: socketOptions.connection.remoteAddress,
+                        remotePort: socketOptions.connection.remotePort,
+                        destHost: options.host || '',
+                        destPort: options.port || '',
+                        action: 'connected'
+                    },
+                    'Using proxied socket from %s:%s to %s:%s',
+                    socketOptions.connection.remoteAddress,
+                    socketOptions.connection.remotePort,
+                    options.host || '',
+                    options.port || ''
+                );
+
+                // only copy options if we need to modify it
+                options = shared.assign(false, options);
+                Object.keys(socketOptions).forEach(key => {
+                    options[key] = socketOptions[key];
+                });
+            }
+
+            let connection = new SMTPConnection(options);
+
+            connection.once('error', err => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                connection.close();
+                return callback(err);
+            });
+
+            connection.once('end', () => {
+                if (returned) {
+                    return;
+                }
+
+                let timer = setTimeout(() => {
+                    if (returned) {
+                        return;
+                    }
+                    returned = true;
+                    // still have not returned, this means we have an unexpected connection close
+                    let err = new Error('Unexpected socket close');
+                    if (connection && connection._socket && connection._socket.upgrading) {
+                        // starttls connection errors
+                        err.code = 'ETLS';
+                    }
+                    callback(err);
+                }, 1000);
+
+                try {
+                    timer.unref();
+                } catch (E) {
+                    // Ignore. Happens on envs with non-node timer implementation
+                }
+            });
+
+            let sendMessage = () => {
+                let envelope = mail.message.getEnvelope();
+                let messageId = mail.message.messageId();
+
+                let recipients = [].concat(envelope.to || []);
+                if (recipients.length > 3) {
+                    recipients.push('...and ' + recipients.splice(2).length + ' more');
+                }
+
+                if (mail.data.dsn) {
+                    envelope.dsn = mail.data.dsn;
+                }
+
+                this.logger.info(
+                    {
+                        tnx: 'send',
+                        messageId
+                    },
+                    'Sending message %s to <%s>',
+                    messageId,
+                    recipients.join(', ')
+                );
+
+                connection.send(envelope, mail.message.createReadStream(), (err, info) => {
+                    returned = true;
+                    connection.close();
+                    if (err) {
+                        this.logger.error(
+                            {
+                                err,
+                                tnx: 'send'
+                            },
+                            'Send error for %s: %s',
+                            messageId,
+                            err.message
+                        );
+                        return callback(err);
+                    }
+                    info.envelope = {
+                        from: envelope.from,
+                        to: envelope.to
+                    };
+                    info.messageId = messageId;
+                    try {
+                        return callback(null, info);
+                    } catch (E) {
+                        this.logger.error(
+                            {
+                                err: E,
+                                tnx: 'callback'
+                            },
+                            'Callback error for %s: %s',
+                            messageId,
+                            E.message
+                        );
+                    }
+                });
+            };
+
+            connection.connect(() => {
+                if (returned) {
+                    return;
+                }
+
+                let auth = this.getAuth(mail.data.auth);
+
+                if (auth && (connection.allowsAuth || options.forceAuth)) {
+                    connection.login(auth, err => {
+                        if (auth && auth !== this.auth && auth.oauth2) {
+                            auth.oauth2.removeAllListeners();
+                        }
+                        if (returned) {
+                            return;
+                        }
+
+                        if (err) {
+                            returned = true;
+                            connection.close();
+                            return callback(err);
+                        }
+
+                        sendMessage();
+                    });
+                } else {
+                    sendMessage();
+                }
+            });
+        });
+    }
+
+    /**
+     * Verifies SMTP configuration
+     *
+     * @param {Function} callback Callback function
+     */
+    verify(callback) {
+        let promise;
+
+        if (!callback) {
+            promise = new Promise((resolve, reject) => {
+                callback = shared.callbackPromise(resolve, reject);
+            });
+        }
+
+        this.getSocket(this.options, (err, socketOptions) => {
+            if (err) {
+                return callback(err);
+            }
+
+            let options = this.options;
+            if (socketOptions && socketOptions.connection) {
+                this.logger.info(
+                    {
+                        tnx: 'proxy',
+                        remoteAddress: socketOptions.connection.remoteAddress,
+                        remotePort: socketOptions.connection.remotePort,
+                        destHost: options.host || '',
+                        destPort: options.port || '',
+                        action: 'connected'
+                    },
+                    'Using proxied socket from %s:%s to %s:%s',
+                    socketOptions.connection.remoteAddress,
+                    socketOptions.connection.remotePort,
+                    options.host || '',
+                    options.port || ''
+                );
+
+                options = shared.assign(false, options);
+                Object.keys(socketOptions).forEach(key => {
+                    options[key] = socketOptions[key];
+                });
+            }
+
+            let connection = new SMTPConnection(options);
+            let returned = false;
+
+            connection.once('error', err => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                connection.close();
+                return callback(err);
+            });
+
+            connection.once('end', () => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                return callback(new Error('Connection closed'));
+            });
+
+            let finalize = () => {
+                if (returned) {
+                    return;
+                }
+                returned = true;
+                connection.quit();
+                return callback(null, true);
+            };
+
+            connection.connect(() => {
+                if (returned) {
+                    return;
+                }
+
+                let authData = this.getAuth({});
+
+                if (authData && (connection.allowsAuth || options.forceAuth)) {
+                    connection.login(authData, err => {
+                        if (returned) {
+                            return;
+                        }
+
+                        if (err) {
+                            returned = true;
+                            connection.close();
+                            return callback(err);
+                        }
+
+                        finalize();
+                    });
+                } else if (!authData && connection.allowsAuth && options.forceAuth) {
+                    let err = new Error('Authentication info was not provided');
+                    err.code = 'NoAuth';
+
+                    returned = true;
+                    connection.close();
+                    return callback(err);
+                } else {
+                    finalize();
+                }
+            });
+        });
+
+        return promise;
+    }
+
+    /**
+     * Releases resources
+     */
+    close() {
+        if (this.auth && this.auth.oauth2) {
+            this.auth.oauth2.removeAllListeners();
+        }
+        this.emit('close');
+    }
+}
+
+// expose to the world
+module.exports = SMTPTransport;

backend/apis/nodejs/node_modules/nodemailer/lib/stream-transport/index.js

@@ -0,0 +1,135 @@
+'use strict';
+
+const packageData = require('../../package.json');
+const shared = require('../shared');
+
+/**
+ * Generates a Transport object for streaming
+ *
+ * Possible options can be the following:
+ *
+ *  * **buffer** if true, then returns the message as a Buffer object instead of a stream
+ *  * **newline** either 'windows' or 'unix'
+ *
+ * @constructor
+ * @param {Object} optional config parameter
+ */
+class StreamTransport {
+    constructor(options) {
+        options = options || {};
+
+        this.options = options || {};
+
+        this.name = 'StreamTransport';
+        this.version = packageData.version;
+
+        this.logger = shared.getLogger(this.options, {
+            component: this.options.component || 'stream-transport'
+        });
+
+        this.winbreak = ['win', 'windows', 'dos', '\r\n'].includes((options.newline || '').toString().toLowerCase());
+    }
+
+    /**
+     * Compiles a mailcomposer message and forwards it to handler that sends it
+     *
+     * @param {Object} emailMessage MailComposer object
+     * @param {Function} callback Callback function to run when the sending is completed
+     */
+    send(mail, done) {
+        // We probably need this in the output
+        mail.message.keepBcc = true;
+
+        let envelope = mail.data.envelope || mail.message.getEnvelope();
+        let messageId = mail.message.messageId();
+
+        let recipients = [].concat(envelope.to || []);
+        if (recipients.length > 3) {
+            recipients.push('...and ' + recipients.splice(2).length + ' more');
+        }
+        this.logger.info(
+            {
+                tnx: 'send',
+                messageId
+            },
+            'Sending message %s to <%s> using %s line breaks',
+            messageId,
+            recipients.join(', '),
+            this.winbreak ? '<CR><LF>' : '<LF>'
+        );
+
+        setImmediate(() => {
+            let stream;
+
+            try {
+                stream = mail.message.createReadStream();
+            } catch (E) {
+                this.logger.error(
+                    {
+                        err: E,
+                        tnx: 'send',
+                        messageId
+                    },
+                    'Creating send stream failed for %s. %s',
+                    messageId,
+                    E.message
+                );
+                return done(E);
+            }
+
+            if (!this.options.buffer) {
+                stream.once('error', err => {
+                    this.logger.error(
+                        {
+                            err,
+                            tnx: 'send',
+                            messageId
+                        },
+                        'Failed creating message for %s. %s',
+                        messageId,
+                        err.message
+                    );
+                });
+                return done(null, {
+                    envelope: mail.data.envelope || mail.message.getEnvelope(),
+                    messageId,
+                    message: stream
+                });
+            }
+
+            let chunks = [];
+            let chunklen = 0;
+            stream.on('readable', () => {
+                let chunk;
+                while ((chunk = stream.read()) !== null) {
+                    chunks.push(chunk);
+                    chunklen += chunk.length;
+                }
+            });
+
+            stream.once('error', err => {
+                this.logger.error(
+                    {
+                        err,
+                        tnx: 'send',
+                        messageId
+                    },
+                    'Failed creating message for %s. %s',
+                    messageId,
+                    err.message
+                );
+                return done(err);
+            });
+
+            stream.on('end', () =>
+                done(null, {
+                    envelope: mail.data.envelope || mail.message.getEnvelope(),
+                    messageId,
+                    message: Buffer.concat(chunks, chunklen)
+                })
+            );
+        });
+    }
+}
+
+module.exports = StreamTransport;

backend/apis/nodejs/node_modules/nodemailer/lib/well-known/index.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const services = require('./services.json');
+const normalized = {};
+
+Object.keys(services).forEach(key => {
+    let service = services[key];
+
+    normalized[normalizeKey(key)] = normalizeService(service);
+
+    [].concat(service.aliases || []).forEach(alias => {
+        normalized[normalizeKey(alias)] = normalizeService(service);
+    });
+
+    [].concat(service.domains || []).forEach(domain => {
+        normalized[normalizeKey(domain)] = normalizeService(service);
+    });
+});
+
+function normalizeKey(key) {
+    return key.replace(/[^a-zA-Z0-9.-]/g, '').toLowerCase();
+}
+
+function normalizeService(service) {
+    let filter = ['domains', 'aliases'];
+    let response = {};
+
+    Object.keys(service).forEach(key => {
+        if (filter.indexOf(key) < 0) {
+            response[key] = service[key];
+        }
+    });
+
+    return response;
+}
+
+/**
+ * Resolves SMTP config for given key. Key can be a name (like 'Gmail'), alias (like 'Google Mail') or
+ * an email address (like 'test@googlemail.com').
+ *
+ * @param {String} key [description]
+ * @returns {Object} SMTP config or false if not found
+ */
+module.exports = function (key) {
+    key = normalizeKey(key.split('@').pop());
+    return normalized[key] || false;
+};

backend/apis/nodejs/node_modules/nodemailer/lib/well-known/services.json

@@ -0,0 +1,370 @@
+{
+    "1und1": {
+        "host": "smtp.1und1.de",
+        "port": 465,
+        "secure": true,
+        "authMethod": "LOGIN"
+    },
+    
+    "Aliyun": {
+        "domains": ["aliyun.com"],
+        "host": "smtp.aliyun.com",
+        "port": 465,
+        "secure": true
+    },
+    
+    "AOL": {
+        "domains": ["aol.com"],
+        "host": "smtp.aol.com",
+        "port": 587
+    },
+
+    "Bluewin": {
+        "host": "smtpauths.bluewin.ch",
+        "domains": ["bluewin.ch"],
+        "port": 465
+    },
+
+    "DebugMail": {
+        "host": "debugmail.io",
+        "port": 25
+    },
+
+    "DynectEmail": {
+        "aliases": ["Dynect"],
+        "host": "smtp.dynect.net",
+        "port": 25
+    },
+
+    "Ethereal": {
+        "aliases": ["ethereal.email"],
+        "host": "smtp.ethereal.email",
+        "port": 587
+    },
+
+    "FastMail": {
+        "domains": ["fastmail.fm"],
+        "host": "smtp.fastmail.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "Forward Email": {
+        "aliases": ["FE", "ForwardEmail"],
+        "domains": ["forwardemail.net"],
+        "host": "smtp.forwardemail.net",
+        "port": 465,
+        "secure": true
+    },
+
+    "Feishu Mail": {
+        "aliases": ["Feishu", "FeishuMail"],
+        "domains": ["www.feishu.cn"],
+        "host": "smtp.feishu.cn",
+        "port": 465,
+        "secure": true
+    },
+
+    "GandiMail": {
+        "aliases": ["Gandi", "Gandi Mail"],
+        "host": "mail.gandi.net",
+        "port": 587
+    },
+
+    "Gmail": {
+        "aliases": ["Google Mail"],
+        "domains": ["gmail.com", "googlemail.com"],
+        "host": "smtp.gmail.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "Godaddy": {
+        "host": "smtpout.secureserver.net",
+        "port": 25
+    },
+
+    "GodaddyAsia": {
+        "host": "smtp.asia.secureserver.net",
+        "port": 25
+    },
+
+    "GodaddyEurope": {
+        "host": "smtp.europe.secureserver.net",
+        "port": 25
+    },
+
+    "hot.ee": {
+        "host": "mail.hot.ee"
+    },
+
+    "Hotmail": {
+        "aliases": ["Outlook", "Outlook.com", "Hotmail.com"],
+        "domains": ["hotmail.com", "outlook.com"],
+        "host": "smtp-mail.outlook.com",
+        "port": 587
+    },
+
+    "iCloud": {
+        "aliases": ["Me", "Mac"],
+        "domains": ["me.com", "mac.com"],
+        "host": "smtp.mail.me.com",
+        "port": 587
+    },
+
+    "Infomaniak": {
+        "host": "mail.infomaniak.com",
+        "domains": ["ik.me", "ikmail.com", "etik.com"],
+        "port": 587
+    },
+    "Loopia": {
+        "host": "mailcluster.loopia.se",
+        "port": 465
+    },
+    "mail.ee": {
+        "host": "smtp.mail.ee"
+    },
+
+    "Mail.ru": {
+        "host": "smtp.mail.ru",
+        "port": 465,
+        "secure": true
+    },
+
+    "Mailcatch.app": {
+        "host": "sandbox-smtp.mailcatch.app",
+        "port": 2525
+    },
+
+    "Maildev": {
+        "port": 1025,
+        "ignoreTLS": true
+    },
+
+    "Mailgun": {
+        "host": "smtp.mailgun.org",
+        "port": 465,
+        "secure": true
+    },
+
+    "Mailjet": {
+        "host": "in.mailjet.com",
+        "port": 587
+    },
+
+    "Mailosaur": {
+        "host": "mailosaur.io",
+        "port": 25
+    },
+
+    "Mailtrap": {
+        "host": "live.smtp.mailtrap.io",
+        "port": 587
+    },
+
+    "Mandrill": {
+        "host": "smtp.mandrillapp.com",
+        "port": 587
+    },
+
+    "Naver": {
+        "host": "smtp.naver.com",
+        "port": 587
+    },
+
+    "One": {
+        "host": "send.one.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "OpenMailBox": {
+        "aliases": ["OMB", "openmailbox.org"],
+        "host": "smtp.openmailbox.org",
+        "port": 465,
+        "secure": true
+    },
+
+    "Outlook365": {
+        "host": "smtp.office365.com",
+        "port": 587,
+        "secure": false
+    },
+
+    "OhMySMTP": {
+        "host": "smtp.ohmysmtp.com",
+        "port": 587,
+        "secure": false
+    },
+
+    "Postmark": {
+        "aliases": ["PostmarkApp"],
+        "host": "smtp.postmarkapp.com",
+        "port": 2525
+    },
+
+    "Proton": {
+        "aliases": ["ProtonMail", "Proton.me", "Protonmail.com", "Protonmail.ch"],
+        "domains": ["proton.me", "protonmail.com", "pm.me", "protonmail.ch"],
+        "host": "smtp.protonmail.ch",
+        "port": 587,
+        "requireTLS": true
+    },
+
+    "qiye.aliyun": {
+        "host": "smtp.mxhichina.com",
+        "port": "465",
+        "secure": true
+    },
+
+    "QQ": {
+        "domains": ["qq.com"],
+        "host": "smtp.qq.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "QQex": {
+        "aliases": ["QQ Enterprise"],
+        "domains": ["exmail.qq.com"],
+        "host": "smtp.exmail.qq.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SendCloud": {
+        "host": "smtp.sendcloud.net",
+        "port": 2525
+    },
+
+    "SendGrid": {
+        "host": "smtp.sendgrid.net",
+        "port": 587
+    },
+
+    "SendinBlue": {
+        "aliases": ["Brevo"],
+        "host": "smtp-relay.brevo.com",
+        "port": 587
+    },
+
+    "SendPulse": {
+        "host": "smtp-pulse.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES": {
+        "host": "email-smtp.us-east-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-US-EAST-1": {
+        "host": "email-smtp.us-east-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-US-WEST-2": {
+        "host": "email-smtp.us-west-2.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-EU-WEST-1": {
+        "host": "email-smtp.eu-west-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-SOUTH-1": {
+        "host": "email-smtp.ap-south-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-NORTHEAST-1": {
+        "host": "email-smtp.ap-northeast-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-NORTHEAST-2": {
+        "host": "email-smtp.ap-northeast-2.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-NORTHEAST-3": {
+        "host": "email-smtp.ap-northeast-3.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-SOUTHEAST-1": {
+        "host": "email-smtp.ap-southeast-1.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "SES-AP-SOUTHEAST-2": {
+        "host": "email-smtp.ap-southeast-2.amazonaws.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "Seznam": {
+        "aliases": ["Seznam Email"],
+        "domains": ["seznam.cz", "email.cz", "post.cz", "spoluzaci.cz"],
+        "host": "smtp.seznam.cz",
+        "port": 465,
+        "secure": true
+    },
+
+    "Sparkpost": {
+        "aliases": ["SparkPost", "SparkPost Mail"],
+        "domains": ["sparkpost.com"],
+        "host": "smtp.sparkpostmail.com",
+        "port": 587,
+        "secure": false
+    },
+
+    "Tipimail": {
+        "host": "smtp.tipimail.com",
+        "port": 587
+    },
+
+    "Yahoo": {
+        "domains": ["yahoo.com"],
+        "host": "smtp.mail.yahoo.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "Yandex": {
+        "domains": ["yandex.ru"],
+        "host": "smtp.yandex.ru",
+        "port": 465,
+        "secure": true
+    },
+
+    "Zoho": {
+        "host": "smtp.zoho.com",
+        "port": 465,
+        "secure": true,
+        "authMethod": "LOGIN"
+    },
+
+    "126": {
+        "host": "smtp.126.com",
+        "port": 465,
+        "secure": true
+    },
+
+    "163": {
+        "host": "smtp.163.com",
+        "port": 465,
+        "secure": true
+    }
+}

backend/apis/nodejs/node_modules/nodemailer/lib/xoauth2/index.js

@@ -0,0 +1,376 @@
+'use strict';
+
+const Stream = require('stream').Stream;
+const nmfetch = require('../fetch');
+const crypto = require('crypto');
+const shared = require('../shared');
+
+/**
+ * XOAUTH2 access_token generator for Gmail.
+ * Create client ID for web applications in Google API console to use it.
+ * See Offline Access for receiving the needed refreshToken for an user
+ * https://developers.google.com/accounts/docs/OAuth2WebServer#offline
+ *
+ * Usage for generating access tokens with a custom method using provisionCallback:
+ * provisionCallback(user, renew, callback)
+ *   * user is the username to get the token for
+ *   * renew is a boolean that if true indicates that existing token failed and needs to be renewed
+ *   * callback is the callback to run with (error, accessToken [, expires])
+ *     * accessToken is a string
+ *     * expires is an optional expire time in milliseconds
+ * If provisionCallback is used, then Nodemailer does not try to attempt generating the token by itself
+ *
+ * @constructor
+ * @param {Object} options Client information for token generation
+ * @param {String} options.user User e-mail address
+ * @param {String} options.clientId Client ID value
+ * @param {String} options.clientSecret Client secret value
+ * @param {String} options.refreshToken Refresh token for an user
+ * @param {String} options.accessUrl Endpoint for token generation, defaults to 'https://accounts.google.com/o/oauth2/token'
+ * @param {String} options.accessToken An existing valid accessToken
+ * @param {String} options.privateKey Private key for JSW
+ * @param {Number} options.expires Optional Access Token expire time in ms
+ * @param {Number} options.timeout Optional TTL for Access Token in seconds
+ * @param {Function} options.provisionCallback Function to run when a new access token is required
+ */
+class XOAuth2 extends Stream {
+    constructor(options, logger) {
+        super();
+
+        this.options = options || {};
+
+        if (options && options.serviceClient) {
+            if (!options.privateKey || !options.user) {
+                setImmediate(() => this.emit('error', new Error('Options "privateKey" and "user" are required for service account!')));
+                return;
+            }
+
+            let serviceRequestTimeout = Math.min(Math.max(Number(this.options.serviceRequestTimeout) || 0, 0), 3600);
+            this.options.serviceRequestTimeout = serviceRequestTimeout || 5 * 60;
+        }
+
+        this.logger = shared.getLogger(
+            {
+                logger
+            },
+            {
+                component: this.options.component || 'OAuth2'
+            }
+        );
+
+        this.provisionCallback = typeof this.options.provisionCallback === 'function' ? this.options.provisionCallback : false;
+
+        this.options.accessUrl = this.options.accessUrl || 'https://accounts.google.com/o/oauth2/token';
+        this.options.customHeaders = this.options.customHeaders || {};
+        this.options.customParams = this.options.customParams || {};
+
+        this.accessToken = this.options.accessToken || false;
+
+        if (this.options.expires && Number(this.options.expires)) {
+            this.expires = this.options.expires;
+        } else {
+            let timeout = Math.max(Number(this.options.timeout) || 0, 0);
+            this.expires = (timeout && Date.now() + timeout * 1000) || 0;
+        }
+    }
+
+    /**
+     * Returns or generates (if previous has expired) a XOAuth2 token
+     *
+     * @param {Boolean} renew If false then use cached access token (if available)
+     * @param {Function} callback Callback function with error object and token string
+     */
+    getToken(renew, callback) {
+        if (!renew && this.accessToken && (!this.expires || this.expires > Date.now())) {
+            return callback(null, this.accessToken);
+        }
+
+        let generateCallback = (...args) => {
+            if (args[0]) {
+                this.logger.error(
+                    {
+                        err: args[0],
+                        tnx: 'OAUTH2',
+                        user: this.options.user,
+                        action: 'renew'
+                    },
+                    'Failed generating new Access Token for %s',
+                    this.options.user
+                );
+            } else {
+                this.logger.info(
+                    {
+                        tnx: 'OAUTH2',
+                        user: this.options.user,
+                        action: 'renew'
+                    },
+                    'Generated new Access Token for %s',
+                    this.options.user
+                );
+            }
+            callback(...args);
+        };
+
+        if (this.provisionCallback) {
+            this.provisionCallback(this.options.user, !!renew, (err, accessToken, expires) => {
+                if (!err && accessToken) {
+                    this.accessToken = accessToken;
+                    this.expires = expires || 0;
+                }
+                generateCallback(err, accessToken);
+            });
+        } else {
+            this.generateToken(generateCallback);
+        }
+    }
+
+    /**
+     * Updates token values
+     *
+     * @param {String} accessToken New access token
+     * @param {Number} timeout Access token lifetime in seconds
+     *
+     * Emits 'token': { user: User email-address, accessToken: the new accessToken, timeout: TTL in seconds}
+     */
+    updateToken(accessToken, timeout) {
+        this.accessToken = accessToken;
+        timeout = Math.max(Number(timeout) || 0, 0);
+        this.expires = (timeout && Date.now() + timeout * 1000) || 0;
+
+        this.emit('token', {
+            user: this.options.user,
+            accessToken: accessToken || '',
+            expires: this.expires
+        });
+    }
+
+    /**
+     * Generates a new XOAuth2 token with the credentials provided at initialization
+     *
+     * @param {Function} callback Callback function with error object and token string
+     */
+    generateToken(callback) {
+        let urlOptions;
+        let loggedUrlOptions;
+        if (this.options.serviceClient) {
+            // service account - https://developers.google.com/identity/protocols/OAuth2ServiceAccount
+            let iat = Math.floor(Date.now() / 1000); // unix time
+            let tokenData = {
+                iss: this.options.serviceClient,
+                scope: this.options.scope || 'https://mail.google.com/',
+                sub: this.options.user,
+                aud: this.options.accessUrl,
+                iat,
+                exp: iat + this.options.serviceRequestTimeout
+            };
+            let token;
+            try {
+                token = this.jwtSignRS256(tokenData);
+            } catch (err) {
+                return callback(new Error('Can\x27t generate token. Check your auth options'));
+            }
+
+            urlOptions = {
+                grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
+                assertion: token
+            };
+
+            loggedUrlOptions = {
+                grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
+                assertion: tokenData
+            };
+        } else {
+            if (!this.options.refreshToken) {
+                return callback(new Error('Can\x27t create new access token for user'));
+            }
+
+            // web app - https://developers.google.com/identity/protocols/OAuth2WebServer
+            urlOptions = {
+                client_id: this.options.clientId || '',
+                client_secret: this.options.clientSecret || '',
+                refresh_token: this.options.refreshToken,
+                grant_type: 'refresh_token'
+            };
+
+            loggedUrlOptions = {
+                client_id: this.options.clientId || '',
+                client_secret: (this.options.clientSecret || '').substr(0, 6) + '...',
+                refresh_token: (this.options.refreshToken || '').substr(0, 6) + '...',
+                grant_type: 'refresh_token'
+            };
+        }
+
+        Object.keys(this.options.customParams).forEach(key => {
+            urlOptions[key] = this.options.customParams[key];
+            loggedUrlOptions[key] = this.options.customParams[key];
+        });
+
+        this.logger.debug(
+            {
+                tnx: 'OAUTH2',
+                user: this.options.user,
+                action: 'generate'
+            },
+            'Requesting token using: %s',
+            JSON.stringify(loggedUrlOptions)
+        );
+
+        this.postRequest(this.options.accessUrl, urlOptions, this.options, (error, body) => {
+            let data;
+
+            if (error) {
+                return callback(error);
+            }
+
+            try {
+                data = JSON.parse(body.toString());
+            } catch (E) {
+                return callback(E);
+            }
+
+            if (!data || typeof data !== 'object') {
+                this.logger.debug(
+                    {
+                        tnx: 'OAUTH2',
+                        user: this.options.user,
+                        action: 'post'
+                    },
+                    'Response: %s',
+                    (body || '').toString()
+                );
+                return callback(new Error('Invalid authentication response'));
+            }
+
+            let logData = {};
+            Object.keys(data).forEach(key => {
+                if (key !== 'access_token') {
+                    logData[key] = data[key];
+                } else {
+                    logData[key] = (data[key] || '').toString().substr(0, 6) + '...';
+                }
+            });
+
+            this.logger.debug(
+                {
+                    tnx: 'OAUTH2',
+                    user: this.options.user,
+                    action: 'post'
+                },
+                'Response: %s',
+                JSON.stringify(logData)
+            );
+
+            if (data.error) {
+                // Error Response : https://tools.ietf.org/html/rfc6749#section-5.2
+                let errorMessage = data.error;
+                if (data.error_description) {
+                    errorMessage += ': ' + data.error_description;
+                }
+                if (data.error_uri) {
+                    errorMessage += ' (' + data.error_uri + ')';
+                }
+                return callback(new Error(errorMessage));
+            }
+
+            if (data.access_token) {
+                this.updateToken(data.access_token, data.expires_in);
+                return callback(null, this.accessToken);
+            }
+
+            return callback(new Error('No access token'));
+        });
+    }
+
+    /**
+     * Converts an access_token and user id into a base64 encoded XOAuth2 token
+     *
+     * @param {String} [accessToken] Access token string
+     * @return {String} Base64 encoded token for IMAP or SMTP login
+     */
+    buildXOAuth2Token(accessToken) {
+        let authData = ['user=' + (this.options.user || ''), 'auth=Bearer ' + (accessToken || this.accessToken), '', ''];
+        return Buffer.from(authData.join('\x01'), 'utf-8').toString('base64');
+    }
+
+    /**
+     * Custom POST request handler.
+     * This is only needed to keep paths short in Windows – usually this module
+     * is a dependency of a dependency and if it tries to require something
+     * like the request module the paths get way too long to handle for Windows.
+     * As we do only a simple POST request we do not actually require complicated
+     * logic support (no redirects, no nothing) anyway.
+     *
+     * @param {String} url Url to POST to
+     * @param {String|Buffer} payload Payload to POST
+     * @param {Function} callback Callback function with (err, buff)
+     */
+    postRequest(url, payload, params, callback) {
+        let returned = false;
+
+        let chunks = [];
+        let chunklen = 0;
+
+        let req = nmfetch(url, {
+            method: 'post',
+            headers: params.customHeaders,
+            body: payload,
+            allowErrorResponse: true
+        });
+
+        req.on('readable', () => {
+            let chunk;
+            while ((chunk = req.read()) !== null) {
+                chunks.push(chunk);
+                chunklen += chunk.length;
+            }
+        });
+
+        req.once('error', err => {
+            if (returned) {
+                return;
+            }
+            returned = true;
+            return callback(err);
+        });
+
+        req.once('end', () => {
+            if (returned) {
+                return;
+            }
+            returned = true;
+            return callback(null, Buffer.concat(chunks, chunklen));
+        });
+    }
+
+    /**
+     * Encodes a buffer or a string into Base64url format
+     *
+     * @param {Buffer|String} data The data to convert
+     * @return {String} The encoded string
+     */
+    toBase64URL(data) {
+        if (typeof data === 'string') {
+            data = Buffer.from(data);
+        }
+
+        return data
+            .toString('base64')
+            .replace(/[=]+/g, '') // remove '='s
+            .replace(/\+/g, '-') // '+' → '-'
+            .replace(/\//g, '_'); // '/' → '_'
+    }
+
+    /**
+     * Creates a JSON Web Token signed with RS256 (SHA256 + RSA)
+     *
+     * @param {Object} payload The payload to include in the generated token
+     * @return {String} The generated and signed token
+     */
+    jwtSignRS256(payload) {
+        payload = ['{"alg":"RS256","typ":"JWT"}', JSON.stringify(payload)].map(val => this.toBase64URL(val)).join('.');
+        let signature = crypto.createSign('RSA-SHA256').update(payload).sign(this.options.privateKey);
+        return payload + '.' + this.toBase64URL(signature);
+    }
+}
+
+module.exports = XOAuth2;