tooot/src/modules/autolinker/matcher/email-matcher.js.map

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{ Matcher } from \"./matcher\";\nimport { alphaNumericAndMarksCharsStr, domainNameCharRegex } from \"../regex-lib\";\nimport { EmailMatch } from \"../match/email-match\";\nimport { Match } from \"../match/match\";\nimport { throwUnhandledCaseError } from '../utils';\nimport { tldRegex } from \"./tld-regex\";\n\n// For debugging: search for other \"For debugging\" lines\n// import CliTable from 'cli-table';\n\n// RegExp objects which are shared by all instances of EmailMatcher. These are\n// here to avoid re-instantiating the RegExp objects if `Autolinker.link()` is\n// called multiple times, thus instantiating EmailMatcher and its RegExp \n// objects each time (which is very expensive - see https://github.com/gregjacobs/Autolinker.js/issues/314). \n// See descriptions of the properties where they are used for details about them\nconst localPartCharRegex = new RegExp( `[${alphaNumericAndMarksCharsStr}!#$%&'*+/=?^_\\`{|}~-]` );\nconst strictTldRegex = new RegExp( `^${tldRegex.source}$` );\n\n/**\n * @class Autolinker.matcher.Email\n * @extends Autolinker.matcher.Matcher\n *\n * Matcher to find email matches in an input string.\n *\n * See this class's superclass ({@link Autolinker.matcher.Matcher}) for more details.\n */\nexport class EmailMatcher extends Matcher {\n\n\t/**\n\t * Valid characters that can be used in the \"local\" part of an email address,\n\t * i.e. the \"name\" part of \"name@site.com\"\n\t */\n\tprotected localPartCharRegex = localPartCharRegex;\n\n\t/**\n\t * Stricter TLD regex which adds a beginning and end check to ensure\n\t * the string is a valid TLD\n\t */\n\tprotected strictTldRegex = strictTldRegex;\n\n\n\t/**\n\t * @inheritdoc\n\t */\n\tparseMatches( text: string ) {\n\t\tconst tagBuilder = this.tagBuilder,\n\t\t\t  localPartCharRegex = this.localPartCharRegex,\n\t\t\t  strictTldRegex = this.strictTldRegex,\n\t\t\t  matches: Match[] = [],\n\t\t\t  len = text.length,\n\t\t\t  noCurrentEmailMatch = new CurrentEmailMatch();\n\n\t\t// for matching a 'mailto:' prefix\n\t\tconst mailtoTransitions = {\n\t\t\t'm': 'a',\n\t\t\t'a': 'i',\n\t\t\t'i': 'l',\n\t\t\t'l': 't',\n\t\t\t't': 'o',\n\t\t\t'o': ':',\n\t\t};\n\n\t\tlet charIdx = 0,\n\t\t\tstate = State.NonEmailMatch as State,\n\t\t\tcurrentEmailMatch = noCurrentEmailMatch;\n\n\t\t// For debugging: search for other \"For debugging\" lines\n\t\t// const table = new CliTable( {\n\t\t// \thead: [ 'charIdx', 'char', 'state', 'charIdx', 'currentEmailAddress.idx', 'hasDomainDot' ]\n\t\t// } );\n\n\t\twhile( charIdx < len ) {\n\t\t\tconst char = text.charAt( charIdx );\n\n\t\t\t// For debugging: search for other \"For debugging\" lines\n\t\t\t// table.push( \n\t\t\t// \t[ charIdx, char, State[ state ], charIdx, currentEmailAddress.idx, currentEmailAddress.hasDomainDot ] \n\t\t\t// );\n\n\t\t\tswitch( state ) {\n\t\t\t\tcase State.NonEmailMatch: stateNonEmailAddress( char ); break;\n\n\t\t\t\tcase State.Mailto: \n\t\t\t\t\tstateMailTo( text.charAt( charIdx - 1 ) as MailtoChar, char ); \n\t\t\t\t\tbreak;\n\t\t\t\tcase State.LocalPart: stateLocalPart( char ); break;\n\t\t\t\tcase State.LocalPartDot: stateLocalPartDot( char ); break;\n\t\t\t\tcase State.AtSign: stateAtSign( char ); break;\n\t\t\t\tcase State.DomainChar: stateDomainChar( char ); break;\n\t\t\t\tcase State.DomainHyphen: stateDomainHyphen( char ); break;\n\t\t\t\tcase State.DomainDot: stateDomainDot( char ); break;\n\t\n\t\t\t\tdefault: \n\t\t\t\t\tthrowUnhandledCaseError( state );\n\t\t\t}\n\n\t\t\t// For debugging: search for other \"For debugging\" lines\n\t\t\t// table.push( \n\t\t\t// \t[ charIdx, char, State[ state ], charIdx, currentEmailAddress.idx, currentEmailAddress.hasDomainDot ] \n\t\t\t// );\n\n\t\t\tcharIdx++;\n\t\t}\n\n\t\t// Capture any valid match at the end of the string\n\t\tcaptureMatchIfValidAndReset();\n\n\t\t// For debugging: search for other \"For debugging\" lines\n\t\t//console.log( '\\n' + table.toString() );\n\t\t\n\t\treturn matches;\n\n\n\t\t// Handles the state when we're not in an email address\n\t\tfunction stateNonEmailAddress( char: string ) {\n\t\t\tif( char === 'm' ) {\n\t\t\t\tbeginEmailMatch( State.Mailto );\n\n\t\t\t} else if( localPartCharRegex.test( char ) ) {\n\t\t\t\tbeginEmailMatch();\n\n\t\t\t} else {\n\t\t\t\t// not an email address character, continue\n\t\t\t}\n\t\t}\n\n\n\t\t// Handles if we're reading a 'mailto:' prefix on the string\n\t\tfunction stateMailTo( prevChar: MailtoChar, char: string ) {\n\t\t\tif( prevChar === ':' ) {\n\t\t\t\t// We've reached the end of the 'mailto:' prefix\n\t\t\t\tif( localPartCharRegex.test( char ) ) {\n\t\t\t\t\tstate = State.LocalPart;\n\t\t\t\t\tcurrentEmailMatch = new CurrentEmailMatch( { \n\t\t\t\t\t\t...currentEmailMatch, \n\t\t\t\t\t\thasMailtoPrefix: true \n\t\t\t\t\t} );\n\n\t\t\t\t} else {\n\t\t\t\t\t// we've matched 'mailto:' but didn't get anything meaningful\n\t\t\t\t\t// immediately afterwards (for example, we encountered a \n\t\t\t\t\t// space character, or an '@' character which formed 'mailto:@'\n\t\t\t\t\tresetToNonEmailMatchState();\n\t\t\t\t}\n\n\t\t\t} else if( mailtoTransitions[ prevChar ] === char ) {\n\t\t\t\t// We're currently reading the 'mailto:' prefix, stay in\n\t\t\t\t// Mailto state\n\t\t\t\t\n\t\t\t} else if( localPartCharRegex.test( char ) ) {\n\t\t\t\t// We we're reading a prefix of 'mailto:', but encountered a\n\t\t\t\t// different character that didn't continue the prefix\n\t\t\t\tstate = State.LocalPart;\n\n\t\t\t} else if( char === '.' ) {\n\t\t\t\t// We we're reading a prefix of 'mailto:', but encountered a\n\t\t\t\t// dot character\n\t\t\t\tstate = State.LocalPartDot;\n\n\t\t\t} else if( char === '@' ) {\n\t\t\t\t// We we're reading a prefix of 'mailto:', but encountered a\n\t\t\t\t// an @ character\n\t\t\t\tstate = State.AtSign;\n\n\t\t\t} else {\n\t\t\t\t// not an email address character, return to \"NonEmailAddress\" state\n\t\t\t\tresetToNonEmailMatchState();\n\t\t\t}\n\t\t}\n\n\n\t\t// Handles the state when we're currently in the \"local part\" of an \n\t\t// email address (as opposed to the \"domain part\")\n\t\tfunction stateLocalPart( char: string ) {\n\t\t\tif( char === '.' ) {\n\t\t\t\tstate = State.LocalPartDot;\n\n\t\t\t} else if( char === '@' ) {\n\t\t\t\tstate = State.AtSign;\n\n\t\t\t} else if( localPartCharRegex.test( char ) ) {\n\t\t\t\t// stay in the \"local part\" of the email address\n\n\t\t\t} else {\n\t\t\t\t// not an email address character, return to \"NonEmailAddress\" state\n\t\t\t\tresetToNonEmailMatchState();\n\t\t\t}\n\t\t}\n\n\n\t\t// Handles the state where we've read \n\t\tfunction stateLocalPartDot( char: string ) {\n\t\t\tif( char === '.' ) {\n\t\t\t\t// We read a second '.' in a row, not a valid email address \n\t\t\t\t// local part\n\t\t\t\tresetToNonEmailMatchState();\n\n\t\t\t} else if( char === '@' ) {\n\t\t\t\t// We read the '@' character immediately after a dot ('.'), not \n\t\t\t\t// an email address\n\t\t\t\tresetToNonEmailMatchState();\n\n\t\t\t} else if( localPartCharRegex.test( char ) ) {\n\t\t\t\tstate = State.LocalPart;\n\n\t\t\t} else {\n\t\t\t\t// Anything else, not an email address\n\t\t\t\tresetToNonEmailMatchState();\n\t\t\t}\n\t\t}\n\n\n\t\tfunction stateAtSign( char: string ) {\n\t\t\tif( domainNameCharRegex.test( char ) ) {\n\t\t\t\tstate = State.DomainChar;\n\n\t\t\t} else {\n\t\t\t\t// Anything else, not an email address\n\t\t\t\tresetToNonEmailMatchState();\n\t\t\t}\n\t\t}\n\n\t\tfunction stateDomainChar( char: string ) {\n\t\t\tif( char === '.' ) {\n\t\t\t\tstate = State.DomainDot;\n\n\t\t\t} else if( char === '-' ) {\n\t\t\t\tstate = State.DomainHyphen;\n\n\t\t\t} else if( domainNameCharRegex.test( char ) ) {\n\t\t\t\t// Stay in the DomainChar state\n\n\t\t\t} else {\n\t\t\t\t// Anything else, we potentially matched if the criteria has\n\t\t\t\t// been met\n\t\t\t\tcaptureMatchIfValidAndReset();\n\t\t\t}\n\t\t}\n\n\t\tfunction stateDomainHyphen( char: string ) {\n\t\t\tif( char === '-' || char === '.' ) {\n\t\t\t\t// Not valid to have two hyphens (\"--\") or hypen+dot (\"-.\")\n\t\t\t\tcaptureMatchIfValidAndReset();\n\n\t\t\t} else if( domainNameCharRegex.test( char ) ) {\n\t\t\t\tstate = State.DomainChar;\n\n\t\t\t} else {\n\t\t\t\t// Anything else\n\t\t\t\tcaptureMatchIfValidAndReset();\n\t\t\t}\n\t\t}\n\n\t\tfunction stateDomainDot( char: string ) {\n\t\t\tif( char === '.' || char === '-' ) {\n\t\t\t\t// not valid to have two dots (\"..\") or dot+hypen (\".-\")\n\t\t\t\tcaptureMatchIfValidAndReset();\n\n\t\t\t} else if( domainNameCharRegex.test( char ) ) {\n\t\t\t\tstate = State.DomainChar;\n\n\t\t\t\t// After having read a '.' and then a valid domain character,\n\t\t\t\t// we now know that the domain part of the email is valid, and\n\t\t\t\t// we have found at least a partial EmailMatch (however, the\n\t\t\t\t// email address may have additional characters from this point)\n\t\t\t\tcurrentEmailMatch = new CurrentEmailMatch( { \n\t\t\t\t\t...currentEmailMatch, \n\t\t\t\t\thasDomainDot: true \n\t\t\t\t} );\n\n\t\t\t} else {\n\t\t\t\t// Anything else\n\t\t\t\tcaptureMatchIfValidAndReset();\n\t\t\t}\n\t\t}\n\n\n\t\tfunction beginEmailMatch( newState = State.LocalPart ) {\n\t\t\tstate = newState;\n\t\t\tcurrentEmailMatch = new CurrentEmailMatch( { idx: charIdx } );\n\t\t}\n\n\t\tfunction resetToNonEmailMatchState() {\n\t\t\tstate = State.NonEmailMatch;\n\t\t\tcurrentEmailMatch = noCurrentEmailMatch;\n\t\t}\n\n\n\n\t\t/*\n\t\t * Captures the current email address as an EmailMatch if it's valid,\n\t\t * and resets the state to read another email address.\n\t\t */\n\t\tfunction captureMatchIfValidAndReset() {\n\t\t\tif( currentEmailMatch.hasDomainDot ) {  // we need at least one dot in the domain to be considered a valid email address\n\t\t\t\tlet matchedText = text.slice( currentEmailMatch.idx, charIdx );\n\n\t\t\t\t// If we read a '.' or '-' char that ended the email address\n\t\t\t\t// (valid domain name characters, but only valid email address\n\t\t\t\t// characters if they are followed by something else), strip \n\t\t\t\t// it off now\n\t\t\t\tif( /[-.]$/.test( matchedText ) ){\n\t\t\t\t\tmatchedText = matchedText.slice( 0, -1 );\n\t\t\t\t}\n\n\t\t\t\tconst emailAddress = currentEmailMatch.hasMailtoPrefix \n\t\t\t\t\t? matchedText.slice( 'mailto:'.length ) \n\t\t\t\t\t: matchedText;\n\n\t\t\t\t// if the email address has a valid TLD, add it to the list of matches\n\t\t\t\tif ( doesEmailHaveValidTld( emailAddress ) ) {\n\t\t\t\t\tmatches.push( new EmailMatch( {\n\t\t\t\t\t\ttagBuilder  : tagBuilder,\n\t\t\t\t\t\tmatchedText : matchedText,\n\t\t\t\t\t\toffset      : currentEmailMatch.idx,\n\t\t\t\t\t\temail       : emailAddress\n\t\t\t\t\t} ) );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tresetToNonEmailMatchState();\n\t\t\n\n\t\t/**\n\t\t * Determines if the given email address has a valid TLD or not\n\t\t * @param {string} emailAddress - email address\n\t\t * @return {Boolean} - true is email have valid TLD, false otherwise\n\t\t */\n\t\tfunction doesEmailHaveValidTld( emailAddress: string ) {\n\t\t\tconst emailAddressTld : string = emailAddress.split( '.' ).pop() || '';\n\t\t\tconst emailAddressNormalized = emailAddressTld.toLowerCase();\n\t\t\tconst isValidTld = strictTldRegex.test( emailAddressNormalized );\n\n\t\t\treturn isValidTld;\n\t\t}}\n\t}\n\n}\n\ntype MailtoChar = 'm' | 'a' | 'i' | 'l' | 't' | 'o' | ':';\n\nconst enum State {\n\tNonEmailMatch = 0,\n\t\n\tMailto,  // if matching a 'mailto:' prefix\n\tLocalPart,\n\tLocalPartDot,\n\tAtSign,\n\tDomainChar,\n\tDomainHyphen,\n\tDomainDot\n}\n\nclass CurrentEmailMatch {\n\treadonly idx: number;  // the index of the first character in the email address\n\treadonly hasMailtoPrefix: boolean;\n\treadonly hasDomainDot: boolean;\n\n\tconstructor( cfg: Partial<CurrentEmailMatch> = {} ) {\n\t\tthis.idx = cfg.idx !== undefined ? cfg.idx : -1;\n\t\tthis.hasMailtoPrefix = !!cfg.hasMailtoPrefix;\n\t\tthis.hasDomainDot = !!cfg.hasDomainDot;\n\t}\n}"]}