edtfy/edtfy.js

Javascript date parser, transforms user input into the edtf format.

(function() {

var locale = 'en';

var parser = require('./tmp/edtfy.js');

var fr = require('./locales/fr');
var en = require('./locales/en');

var i18n = function(string, localeData) {
  localeData.months.forEach(function(month, i){
    i++;
    i = i >9 ? i : '0' + i;
    string = string.replace(new RegExp('\\b' + month + '\\b', 'g'), 'M' + i);
  });
  localeData.seasons.forEach(function(season, i){
    i++;
    i = '2' + i;
    string = string.replace(new RegExp('\\b' + season + '\\b', 'g'), 'S' + i);
  });
  string = string.replace(new RegExp('\\b' + localeData.century + '\\b', 'g'), 'C');
  string = string.replace(new RegExp('\\b' + localeData.around + '\\b', 'g'), '~');
  string = string.replace(new RegExp('\\b' + localeData.between1 + '\\b', 'g'), 'B1');
  string = string.replace(new RegExp('\\b' + localeData.between2 + '\\b', 'g'), 'B2');
  string = string.replace(new RegExp('\\b' + localeData.and + '\\b', 'g'), 'A');
  string = string.replace(new RegExp('\\b' + localeData.or + '\\b', 'g'), 'O');
  string = string.replace(new RegExp('\\b' + localeData.unknown + '\\b', 'g'), 'U');
  string = string.replace(new RegExp('\\b' + localeData.open + '\\b', 'g'), 'OP');
  string = string.replace(new RegExp(' ?(' + localeData.negative + ')\\b', 'g'), ' BCE');
  string = string.replace(new RegExp(' ?(' + localeData.positive + ')\\b', 'g'), '');
  string = string.replace(new RegExp('\\b' + localeData.before, 'g'), 'BF ');
  string = string.replace(new RegExp('\\b' + localeData.after, 'g'), 'AF ');
  string = string.replace(new RegExp('\\b' + localeData.days + '\\b', 'g'), '');
  return string;
};

module.exports = function(string, options) {
  options = options || {};
  options.locale = options.locale || locale;
  var localeData = options.locale === 'en' ? en : fr;
  string = string.trim()
    .toLowerCase()
    .replace(/[,.]/g, ' ')
    .replace(/ +/g, ' ')
    .replace(/–/g, '-')
    // fr
    .replace(/[àáâãäå]/g,"a")
    .replace(/ç/g,"c")
    .replace(/[èéêë]/g,"e")
    .replace(/[ìíîï]/g,"i")
    .replace(/[òóôõö]/g,"o")
    .replace(/[ùúûü]/g,"u")
    .replace(/[ýÿ]/g,"y")
    .replace(/\ble\b/g, '').replace(/\ben\b\s*(\d)/g, '$1').replace(/\bl'\b/g, '').replace(/\bl'an\b/g, '')
    .replace(/(\d+)\s?eme\b/g, '$1').replace(/(\d+)\s?er\b/g, '$1').replace(/(\d+)\s?e\b/g, '$1')
    // en
    .replace(/\bthe\b/g, '').replace(/\bin\b/g, '')
    .replace(/(\d+)\s?st\b/g, '$1').replace(/(\d+)\s?nd\b/g, '$1').replace(/(\d+)\s?rd\b/g, '$1').replace(/(\d+)\s?th\b/g, '$1')
    .replace(/ +/g, ' ');
    string = i18n(string, localeData).trim()
    // fr
    .replace(/([ivxlcdm]+)\s?eme C/g, '$1 C').replace(/([ivxlcdm]+)\s?er C/g, '$1 C').replace(/([ivxlcdm]+)\s?e C/g, '$1 C')
    // en
    .replace(/([ivxlcdm]+)\s?st C/g, '$1 C').replace(/([ivxlcdm]+)\s?nd C/g, '$1 C').replace(/([ivxlcdm]+)\s?rd C/g, '$1 C').replace(/([ivxlcdm]+)\s?th C/g, '$1 C');
  var result;
  // we need this one because of > and < in '< 1988' and '<1988'
  string = string.replace(/ +/g, ' ');
  localeData.format.forEach(function(format, i) {
    try {
      if (!result) {
        result = parser.parse(string, {format: format});
      }
    } catch (e) {
      if (i === localeData.format.length - 1) {
        throw e;
      }
    }
  });
  return result;
}

module.exports.locale = function(newLocale) {
  if (newLocale) {
    locale = newLocale;
  } else {
    return locale;
  }
}

})();