tooot/src/modules/autolinker/matcher/mention-matcher.js

97 lines
4.6 KiB
JavaScript

import * as tslib_1 from "tslib";
import { Matcher } from "./matcher";
import { alphaNumericAndMarksCharsStr } from "../regex-lib";
import { MentionMatch } from "../match/mention-match";
// RegExp objects which are shared by all instances of MentionMatcher. These are
// here to avoid re-instantiating the RegExp objects if `Autolinker.link()` is
// called multiple times, thus instantiating MentionMatcher and its RegExp
// objects each time (which is very expensive - see https://github.com/gregjacobs/Autolinker.js/issues/314).
// See descriptions of the properties where they are used for details about them
var mastodonRegex = new RegExp("@[_" + alphaNumericAndMarksCharsStr + "]{1,}[@]?[_." + alphaNumericAndMarksCharsStr + "]{0,}(?![_" + alphaNumericAndMarksCharsStr + "])", 'g');
var twitterRegex = new RegExp("@[_" + alphaNumericAndMarksCharsStr + "]{1,50}(?![_" + alphaNumericAndMarksCharsStr + "])", 'g'); // lookahead used to make sure we don't match something above 50 characters
var instagramRegex = new RegExp("@[_." + alphaNumericAndMarksCharsStr + "]{1,30}(?![_" + alphaNumericAndMarksCharsStr + "])", 'g'); // lookahead used to make sure we don't match something above 30 characters
var soundcloudRegex = new RegExp("@[-_." + alphaNumericAndMarksCharsStr + "]{1,50}(?![-_" + alphaNumericAndMarksCharsStr + "])", 'g'); // lookahead used to make sure we don't match something above 50 characters
var nonWordCharRegex = new RegExp('[^' + alphaNumericAndMarksCharsStr + ']');
/**
* @class Autolinker.matcher.Mention
* @extends Autolinker.matcher.Matcher
*
* Matcher to find/replace username matches in an input string.
*/
var MentionMatcher = /** @class */ (function (_super) {
tslib_1.__extends(MentionMatcher, _super);
/**
* @method constructor
* @param {Object} cfg The configuration properties for the Match instance,
* specified in an Object (map).
*/
function MentionMatcher(cfg) {
var _this = _super.call(this, cfg) || this;
/**
* @cfg {'twitter'/'instagram'/'soundcloud'} protected
*
* The name of service to link @mentions to.
*
* Valid values are: 'twitter', 'instagram', or 'soundcloud'
*/
_this.serviceName = 'mastodon'; // default value just to get the above doc comment in the ES5 output and documentation generator
/**
* Hash of regular expression to match username handles. Example match:
*
* @asdf
*
* @private
* @property {Object} matcherRegexes
*/
_this.matcherRegexes = {
'mastodon': mastodonRegex,
'twitter': twitterRegex,
'instagram': instagramRegex,
'soundcloud': soundcloudRegex
};
/**
* The regular expression to use to check the character before a username match to
* make sure we didn't accidentally match an email address.
*
* For example, the string "asdf@asdf.com" should not match "@asdf" as a username.
*
* @private
* @property {RegExp} nonWordCharRegex
*/
_this.nonWordCharRegex = nonWordCharRegex;
_this.serviceName = cfg.serviceName;
return _this;
}
/**
* @inheritdoc
*/
MentionMatcher.prototype.parseMatches = function (text) {
var serviceName = this.serviceName, matcherRegex = this.matcherRegexes[this.serviceName], nonWordCharRegex = this.nonWordCharRegex, tagBuilder = this.tagBuilder, matches = [], match;
if (!matcherRegex) {
return matches;
}
while ((match = matcherRegex.exec(text)) !== null) {
var offset = match.index, prevChar = text.charAt(offset - 1);
// If we found the match at the beginning of the string, or we found the match
// and there is a whitespace char in front of it (meaning it is not an email
// address), then it is a username match.
if (offset === 0 || nonWordCharRegex.test(prevChar)) {
var matchedText = match[0].replace(/\.+$/g, ''), // strip off trailing .
mention = matchedText.slice(1); // strip off the '@' character at the beginning
matches.push(new MentionMatch({
tagBuilder: tagBuilder,
matchedText: matchedText,
offset: offset,
serviceName: serviceName,
mention: mention
}));
}
}
return matches;
};
return MentionMatcher;
}(Matcher));
export { MentionMatcher };
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