string-punctuation-tokenizer
Version:
Small library that provides functions to tokenize a string into an array of words with or without punctuation
239 lines (192 loc) • 23.3 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.classifyTokens = exports.tokenize = exports.tokenizeOrigLang = exports.number_ = exports.greedyNumber = exports.number = exports.whitespace = exports.punctuation = exports.origGreedyWord = exports.greedyWord = exports.origWord = exports.word = exports._greedyNumber = exports._origGreedyWord = exports._greedyWord = exports._origWordOrNumber = exports._wordOrNumber = exports._number = exports._origWord = exports._word = void 0;
var _xregexp = _interopRequireDefault(require("xregexp"));
var _occurrences2 = require("./occurrences");
var _normalizers = require("./normalizers");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
// constants
var _word = "[\\pL\\pM\\u200D\\u2060]+"; // TRICKY: original languages do not use single quotes so u2019 is considered part of a word
exports._word = _word;
var _origWord = "[\\pL\\pM\\u200D\\u2060\\u2019]+";
exports._origWord = _origWord;
var _number = '[\\pN\\pNd\\pNl\\pNo]+';
exports._number = _number;
var _wordOrNumber = '(' + _word + '|' + _number + ')';
exports._wordOrNumber = _wordOrNumber;
var _origWordOrNumber = '(' + _origWord + '|' + _number + ')';
exports._origWordOrNumber = _origWordOrNumber;
var _greedyWord = '(' + _wordOrNumber + '([-\'’]' + _word + ')+|' + _word + '’?)';
exports._greedyWord = _greedyWord;
var _origGreedyWord = '(' + _origWordOrNumber + '([-\'’]' + _origWord + ')+|' + _origWord + '’?)';
exports._origGreedyWord = _origGreedyWord;
var _greedyNumber = '(' + _number + '([:.,]?' + _number + ')+|' + _number + ')';
exports._greedyNumber = _greedyNumber;
var word = (0, _xregexp["default"])(_word, '');
exports.word = word;
var origWord = (0, _xregexp["default"])(_origWord, '');
exports.origWord = origWord;
var greedyWord = (0, _xregexp["default"])(_greedyWord, '');
exports.greedyWord = greedyWord;
var origGreedyWord = (0, _xregexp["default"])(_origGreedyWord, '');
exports.origGreedyWord = origGreedyWord;
var punctuation = (0, _xregexp["default"])('(^\\p{P}|[<>]{2})', '');
exports.punctuation = punctuation;
var whitespace = /\s+/;
exports.whitespace = whitespace;
var number = (0, _xregexp["default"])(_number);
exports.number = number;
var greedyNumber = (0, _xregexp["default"])(_greedyNumber); // /(\d+([:.,]?\d)+|\d+)/;
exports.greedyNumber = greedyNumber;
var number_ = (0, _xregexp["default"])(number);
exports.number_ = number_;
var tokenizeOrigLang = function tokenizeOrigLang(params) {
return tokenize(_objectSpread({
parsers: {
word: origWord,
greedyWord: origGreedyWord,
whitespace: whitespace,
punctuation: punctuation,
number: number
}
}, params));
};
/**
* Tokenize a string into an array of words
* @param {Object} params - string to be tokenized
* @return {Array} - array of tokenized words/strings
*/
exports.tokenizeOrigLang = tokenizeOrigLang;
var tokenize = function tokenize(_ref) {
var _ref$text = _ref.text,
text = _ref$text === void 0 ? '' : _ref$text,
_ref$includeWords = _ref.includeWords,
includeWords = _ref$includeWords === void 0 ? true : _ref$includeWords,
_ref$includeNumbers = _ref.includeNumbers,
includeNumbers = _ref$includeNumbers === void 0 ? true : _ref$includeNumbers,
_ref$includePunctuati = _ref.includePunctuation,
includePunctuation = _ref$includePunctuati === void 0 ? false : _ref$includePunctuati,
_ref$includeWhitespac = _ref.includeWhitespace,
includeWhitespace = _ref$includeWhitespac === void 0 ? false : _ref$includeWhitespac,
_ref$includeUnknown = _ref.includeUnknown,
includeUnknown = _ref$includeUnknown === void 0 ? false : _ref$includeUnknown,
_ref$greedy = _ref.greedy,
greedy = _ref$greedy === void 0 ? false : _ref$greedy,
_ref$verbose = _ref.verbose,
verbose = _ref$verbose === void 0 ? false : _ref$verbose,
_ref$occurrences = _ref.occurrences,
occurrences = _ref$occurrences === void 0 ? false : _ref$occurrences,
_ref$parsers = _ref.parsers,
parsers = _ref$parsers === void 0 ? {
word: word,
greedyWord: greedyWord,
whitespace: whitespace,
punctuation: punctuation,
number: number
} : _ref$parsers,
_ref$normalize = _ref.normalize,
normalize = _ref$normalize === void 0 ? false : _ref$normalize,
_ref$normalizations = _ref.normalizations,
normalizations = _ref$normalizations === void 0 ? null : _ref$normalizations;
var string = text.slice(0);
if (normalize) string = (0, _normalizers.normalizer)(string);
if (normalize && normalizations) {
string = (0, _normalizers.normalizerDestructive)(string, normalizations);
}
var greedyParsers = _objectSpread({}, parsers, {
word: parsers.greedyWord,
number: greedyNumber
});
var _parsers = greedy ? greedyParsers : parsers;
delete _parsers.greedyWord;
var tokens = classifyTokens(string, _parsers, 'unknown');
var types = [];
if (includeWords) types.push('word');
if (includeNumbers) types.push('number');
if (includeWhitespace) types.push('whitespace');
if (includePunctuation) types.push('punctuation');
if (includeUnknown) types.push('unknown');
tokens = tokens.filter(function (token) {
return types.includes(token.type);
});
if (occurrences) {
tokens = tokens.map(function (token, index) {
var _occurrences = (0, _occurrences2.occurrencesInTokens)(tokens, token.token);
var _occurrence = (0, _occurrences2.occurrenceInTokens)(tokens, index, token.token);
return _objectSpread({}, token, {
occurrence: _occurrence,
occurrences: _occurrences
});
});
}
if (verbose) {
tokens = tokens.map(function (token) {
delete token.matches;
return token;
});
} else {
tokens = tokens.map(function (token) {
return token.token;
});
}
return tokens;
};
/**
* Tiny tokenizer - https://gist.github.com/borgar/451393
* @param {String} string - string to be tokenized
* @param {Object} parsers - { word:/\w+/, whitespace:/\s+/, punctuation:/[^\w\s]/ }
* @param {String} deftok - type to label tokens that are not classified with the above parsers
* @return {Array} - array of objects => [{ token:"this", type:"word" },{ token:" ", type:"whitespace" }, Object { token:"is", type:"word" }, ... ]
**/
exports.tokenize = tokenize;
var classifyTokens = function classifyTokens(string, parsers, deftok) {
string = !string ? '' : string; // if string is undefined, make it an empty string
if (typeof string !== 'string') {
throw new Error("tokenizer.tokenize() string is not String: ".concat(string));
}
var m;
var r;
var t;
var tokens = [];
while (string) {
t = null;
m = string.length;
var key = void 0;
for (key in parsers) {
if (Object.prototype.hasOwnProperty.call(parsers, key)) {
r = parsers[key].exec(string); // try to choose the best match if there are several
// where "best" is the closest to the current starting point
if (r && r.index < m) {
var token = r[0];
t = {
token: token,
type: key,
matches: r.slice(1)
};
m = r.index;
}
}
}
if (m) {
// there is text between last token and currently
// matched token - push that out as default or "unknown"
tokens.push({
token: string.substr(0, m),
type: deftok || 'unknown'
});
}
if (t) {
// push current token onto sequence
tokens.push(t);
}
string = string.substr(m + (t ? t.token.length : 0));
}
return tokens;
};
exports.classifyTokens = classifyTokens;
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xRegExp from 'xregexp';\nimport {occurrenceInTokens, occurrencesInTokens} from './occurrences';\nimport {normalizer, normalizerDestructive} from './normalizers';\n\n// constants\nexport const _word = '[\\\\pL\\\\pM\\\\u200D\\\\u2060]+';\n// TRICKY: original languages do not use single quotes so u2019 is considered part of a word\nexport const _origWord = '[\\\\pL\\\\pM\\\\u200D\\\\u2060\\\\u2019]+';\nexport const _number = '[\\\\pN\\\\pNd\\\\pNl\\\\pNo]+';\nexport const _wordOrNumber = '(' + _word + '|' + _number + ')';\nexport const _origWordOrNumber = '(' + _origWord + '|' + _number + ')';\nexport const _greedyWord = '(' + _wordOrNumber + '([-\\'’]' + _word + ')+|' + _word + '’?)';\nexport const _origGreedyWord = '(' + _origWordOrNumber + '([-\\'’]' + _origWord + ')+|' + _origWord + '’?)';\nexport const _greedyNumber = '(' + _number + '([:.,]?' + _number + ')+|' + _number + ')';\nexport const word = xRegExp(_word, '');\nexport const origWord = xRegExp(_origWord, '');\nexport const greedyWord = xRegExp(_greedyWord, '');\nexport const origGreedyWord = xRegExp(_origGreedyWord, '');\nexport const punctuation = xRegExp('(^\\\\p{P}|[<>]{2})', '');\nexport const whitespace = /\\s+/;\nexport const number = xRegExp(_number);\nexport const greedyNumber = xRegExp(_greedyNumber); //  /(\\d+([:.,]?\\d)+|\\d+)/;\nexport const number_ = xRegExp(number);\n\n\nexport const tokenizeOrigLang = (params) => tokenize({\n  parsers: {\n    word: origWord,\n    greedyWord: origGreedyWord,\n    whitespace,\n    punctuation,\n    number,\n  },\n  ...params,\n});\n\n/**\n * Tokenize a string into an array of words\n * @param {Object} params - string to be tokenized\n * @return {Array} - array of tokenized words/strings\n */\nexport const tokenize = ({\n  text = '',\n  includeWords = true,\n  includeNumbers = true,\n  includePunctuation = false,\n  includeWhitespace = false,\n  includeUnknown = false,\n  greedy = false,\n  verbose = false,\n  occurrences = false,\n  parsers = {word, greedyWord, whitespace, punctuation, number},\n  normalize = false,\n  normalizations = null,\n}) => {\n  let string = text.slice(0);\n  if (normalize) string = normalizer(string);\n  if (normalize && normalizations) {\n    string = normalizerDestructive(string, normalizations);\n  }\n\n  const greedyParsers = {\n    ...parsers,\n    word: parsers.greedyWord,\n    number: greedyNumber,\n  };\n  const _parsers = greedy ? greedyParsers : parsers;\n  delete _parsers.greedyWord;\n  let tokens = classifyTokens(string, _parsers, 'unknown');\n  const types = [];\n  if (includeWords) types.push('word');\n  if (includeNumbers) types.push('number');\n  if (includeWhitespace) types.push('whitespace');\n  if (includePunctuation) types.push('punctuation');\n  if (includeUnknown) types.push('unknown');\n  tokens = tokens.filter((token) => types.includes(token.type));\n  if (occurrences) {\n    tokens = tokens.map((token, index) => {\n      const _occurrences = occurrencesInTokens(tokens, token.token);\n      const _occurrence = occurrenceInTokens(tokens, index, token.token);\n      return {...token, occurrence: _occurrence, occurrences: _occurrences};\n    });\n  }\n  if (verbose) {\n    tokens = tokens.map((token) => {\n      delete token.matches;\n      return token;\n    });\n  } else {\n    tokens = tokens.map((token) => token.token);\n  }\n  return tokens;\n};\n\n/**\n * Tiny tokenizer - https://gist.github.com/borgar/451393\n * @param {String} string - string to be tokenized\n * @param {Object} parsers - { word:/\\w+/, whitespace:/\\s+/, punctuation:/[^\\w\\s]/ }\n * @param {String} deftok - type to label tokens that are not classified with the above parsers\n * @return {Array} - array of objects => [{ token:\"this\", type:\"word\" },{ token:\" \", type:\"whitespace\" }, Object { token:\"is\", type:\"word\" }, ... ]\n**/\nexport const classifyTokens = (string, parsers, deftok) => {\n  string = (!string) ? '' : string; // if string is undefined, make it an empty string\n  if (typeof string !== 'string') {\n    throw new Error(`tokenizer.tokenize() string is not String: ${string}`);\n  }\n  let m;\n  let r;\n  let t;\n  let tokens = [];\n  while (string) {\n    t = null;\n    m = string.length;\n    let key;\n    for (key in parsers) {\n      if (Object.prototype.hasOwnProperty.call(parsers, key)) {\n        r = parsers[key].exec(string);\n        // try to choose the best match if there are several\n        // where \"best\" is the closest to the current starting point\n        if (r && (r.index < m)) {\n          let token = r[0];\n          t = {\n            token,\n            type: key,\n            matches: r.slice(1),\n          };\n          m = r.index;\n        }\n      }\n    }\n    if (m) {\n      // there is text between last token and currently\n      // matched token - push that out as default or \"unknown\"\n      tokens.push({\n        token: string.substr(0, m),\n        type: deftok || 'unknown',\n      });\n    }\n    if (t) {\n      // push current token onto sequence\n      tokens.push(t);\n    }\n    string = string.substr(m + (t ? t.token.length : 0));\n  }\n  return tokens;\n};\n\n"]}