SGH / COMPONENTS

  'use strict';
  
  function L10nError(message, id, lang) {
    this.name = 'L10nError';
    this.message = message;
    this.id = id;
    this.lang = lang;
  }
  L10nError.prototype = Object.create(Error.prototype);
  L10nError.prototype.constructor = L10nError;
  
  function load(type, url) {
    return new Promise(function(resolve, reject) {
      const xhr = new XMLHttpRequest();
  
      if (xhr.overrideMimeType) {
        xhr.overrideMimeType(type);
      }
  
      xhr.open('GET', url, true);
  
      if (type === 'application/json') {
        xhr.responseType = 'json';
      }
  
      xhr.addEventListener('load', function io_onload(e) {
        if (e.target.status === 200 || e.target.status === 0) {
          // Sinon.JS's FakeXHR doesn't have the response property
          resolve(e.target.response || e.target.responseText);
        } else {
          reject(new L10nError('Not found: ' + url));
        }
      });
      xhr.addEventListener('error', reject);
      xhr.addEventListener('timeout', reject);
  
      // the app: protocol throws on 404, see https://bugzil.la/827243
      try {
        xhr.send(null);
      } catch (e) {
        if (e.name === 'NS_ERROR_FILE_NOT_FOUND') {
          // the app: protocol throws on 404, see https://bugzil.la/827243
          reject(new L10nError('Not found: ' + url));
        } else {
          throw e;
        }
      }
    });
  }
  
  const io = {
    extra: function(code, ver, path, type) {
      return navigator.mozApps.getLocalizationResource(
        code, ver, path, type);
    },
    app: function(code, ver, path, type) {
      switch (type) {
        case 'text':
          return load('text/plain', path);
        case 'json':
          return load('application/json', path);
        default:
          throw new L10nError('Unknown file type: ' + type);
      }
    },
  };
  

  function fetchResource$1(res, { code, src, ver }) {
    const url = res.replace('{locale}', code);

    const type = res.endsWith('.json') ? 'json' : 'text';

    return io[src](code, ver, url, type);

  }
  

  const KNOWN_MACROS = ['plural'];
  const MAX_PLACEABLE_LENGTH = 2500;

  // Unicode bidi isolation characters
  const FSI = '\u2068';
  const PDI = '\u2069';

  const resolutionChain = new WeakSet();

  function format(ctx, lang, args, entity) {
    if (typeof entity === 'string') {
      return [{}, entity];
    }

    if (resolutionChain.has(entity)) {
      throw new L10nError('Cyclic reference detected');
    }

    resolutionChain.add(entity);

    let rv;
    // if format fails, we want the exception to bubble up and stop the whole
    // resolving process;  however, we still need to remove the entity from the
    // resolution chain
    try {
      rv = resolveValue(
        {}, ctx, lang, args, entity.value, entity.index);
    } finally {
      resolutionChain.delete(entity);
    }
    return rv;
  }

  function resolveIdentifier(ctx, lang, args, id) {
    if (KNOWN_MACROS.indexOf(id) > -1) {
      return [{}, ctx._getMacro(lang, id)];
    }

    if (args && args.hasOwnProperty(id)) {
      if (typeof args[id] === 'string' || (typeof args[id] === 'number' &&
          !isNaN(args[id]))) {
        return [{}, args[id]];

      } else {

        throw new L10nError('Arg must be a string or a number: ' + id);

      }

    }

    // XXX: special case for Node.js where still:
    // '__proto__' in Object.create(null) => true
    if (id === '__proto__') {
      throw new L10nError('Illegal id: ' + id);
    }

    const entity = ctx._getEntity(lang, id);

    if (entity) {
      return format(ctx, lang, args, entity);
    }

    throw new L10nError('Unknown reference: ' + id);
  }

  function subPlaceable(locals, ctx, lang, args, id) {
    let newLocals, value;

    try {
      [newLocals, value] = resolveIdentifier(ctx, lang, args, id);
    } catch (err) {
      return [{ error: err }, FSI + '{{ ' + id + ' }}' + PDI];
    }

    if (typeof value === 'number') {
      const formatter = ctx._getNumberFormatter(lang);
      return [newLocals, formatter.format(value)];
    }
  
    if (typeof value === 'string') {
      // prevent Billion Laughs attacks
      if (value.length >= MAX_PLACEABLE_LENGTH) {
        throw new L10nError('Too many characters in placeable (' +
                            value.length + ', max allowed is ' +
                            MAX_PLACEABLE_LENGTH + ')');

      }

      return [newLocals, FSI + value + PDI];
    }

    return [{}, FSI + '{{ ' + id + ' }}' + PDI];
  }

  function interpolate(locals, ctx, lang, args, arr) {
    return arr.reduce(function([localsSeq, valueSeq], cur) {
      if (typeof cur === 'string') {
        return [localsSeq, valueSeq + cur];

      } else {

        const [, value] = subPlaceable(locals, ctx, lang, args, cur.name);
        // wrap the substitution in bidi isolate characters
        return [localsSeq, valueSeq + value];

      }

    }, [locals, '']);
  }

  function resolveSelector(ctx, lang, args, expr, index) {
    //XXX: Dehardcode!!!
    let selectorName;
    if (index[0].type === 'call' && index[0].expr.type === 'prop' &&
        index[0].expr.expr.name === 'cldr') {
      selectorName = 'plural';
    } else {
      selectorName = index[0].name;
    }
    const selector = resolveIdentifier(ctx, lang, args, selectorName)[1];

    if (typeof selector !== 'function') {
      // selector is a simple reference to an entity or args
      return selector;
    }

    const argValue = index[0].args ?
      resolveIdentifier(ctx, lang, args, index[0].args[0].name)[1] : undefined;
  
    if (selectorName === 'plural') {
      // special cases for zero, one, two if they are defined on the hash
      if (argValue === 0 && 'zero' in expr) {
        return 'zero';

      }

      if (argValue === 1 && 'one' in expr) {
        return 'one';
      }
      if (argValue === 2 && 'two' in expr) {
        return 'two';
      }
    }

    return selector(argValue);
  }

  function resolveValue(locals, ctx, lang, args, expr, index) {
    if (!expr) {
      return [locals, expr];
    }

  
    if (typeof expr === 'string' ||
        typeof expr === 'boolean' ||
        typeof expr === 'number') {
      return [locals, expr];
    }
  
    if (Array.isArray(expr)) {
      return interpolate(locals, ctx, lang, args, expr);
    }
  
    // otherwise, it's a dict
    if (index) {
      // try to use the index in order to select the right dict member
      const selector = resolveSelector(ctx, lang, args, expr, index);
      if (selector in expr) {
        return resolveValue(locals, ctx, lang, args, expr[selector]);
      }
    }
  
    // if there was no index or no selector was found, try the default
    // XXX 'other' is an artifact from Gaia
    const defaultKey = expr.__default || 'other';
    if (defaultKey in expr) {
      return resolveValue(locals, ctx, lang, args, expr[defaultKey]);
    }
  
    throw new L10nError('Unresolvable value');
  }
  
  const locales2rules = {
    'af': 3,
    'ak': 4,
    'am': 4,
    'ar': 1,
    'asa': 3,
    'az': 0,
    'be': 11,
    'bem': 3,
    'bez': 3,
    'bg': 3,
    'bh': 4,
    'bm': 0,
    'bn': 3,
    'bo': 0,
    'br': 20,
    'brx': 3,
    'bs': 11,
    'ca': 3,
    'cgg': 3,
    'chr': 3,
    'cs': 12,
    'cy': 17,
    'da': 3,
    'de': 3,
    'dv': 3,
    'dz': 0,
    'ee': 3,
    'el': 3,
    'en': 3,
    'eo': 3,
    'es': 3,
    'et': 3,
    'eu': 3,
    'fa': 0,
    'ff': 5,
    'fi': 3,
    'fil': 4,
    'fo': 3,
    'fr': 5,
    'fur': 3,
    'fy': 3,
    'ga': 8,
    'gd': 24,
    'gl': 3,
    'gsw': 3,
    'gu': 3,
    'guw': 4,
    'gv': 23,
    'ha': 3,
    'haw': 3,
    'he': 2,
    'hi': 4,
    'hr': 11,
    'hu': 0,
    'id': 0,
    'ig': 0,
    'ii': 0,
    'is': 3,
    'it': 3,
    'iu': 7,
    'ja': 0,
    'jmc': 3,
    'jv': 0,
    'ka': 0,
    'kab': 5,
    'kaj': 3,
    'kcg': 3,
    'kde': 0,
    'kea': 0,
    'kk': 3,
    'kl': 3,
    'km': 0,
    'kn': 0,
    'ko': 0,
    'ksb': 3,
    'ksh': 21,
    'ku': 3,
    'kw': 7,
    'lag': 18,
    'lb': 3,
    'lg': 3,
    'ln': 4,
    'lo': 0,
    'lt': 10,
    'lv': 6,
    'mas': 3,
    'mg': 4,
    'mk': 16,
    'ml': 3,
    'mn': 3,
    'mo': 9,
    'mr': 3,
    'ms': 0,
    'mt': 15,
    'my': 0,
    'nah': 3,
    'naq': 7,
    'nb': 3,
    'nd': 3,
    'ne': 3,
    'nl': 3,
    'nn': 3,
    'no': 3,
    'nr': 3,
    'nso': 4,
    'ny': 3,
    'nyn': 3,
    'om': 3,
    'or': 3,
    'pa': 3,
    'pap': 3,
    'pl': 13,
    'ps': 3,
    'pt': 3,
    'rm': 3,
    'ro': 9,
    'rof': 3,
    'ru': 11,
    'rwk': 3,
    'sah': 0,
    'saq': 3,
    'se': 7,
    'seh': 3,
    'ses': 0,
    'sg': 0,
    'sh': 11,
    'shi': 19,
    'sk': 12,
    'sl': 14,
    'sma': 7,
    'smi': 7,
    'smj': 7,
    'smn': 7,
    'sms': 7,
    'sn': 3,
    'so': 3,
    'sq': 3,
    'sr': 11,
    'ss': 3,
    'ssy': 3,
    'st': 3,
    'sv': 3,
    'sw': 3,
    'syr': 3,
    'ta': 3,
    'te': 3,
    'teo': 3,
    'th': 0,
    'ti': 4,
    'tig': 3,
    'tk': 3,
    'tl': 4,
    'tn': 3,
    'to': 0,
    'tr': 0,
    'ts': 3,
    'tzm': 22,
    'uk': 11,
    'ur': 3,
    've': 3,
    'vi': 0,
    'vun': 3,
    'wa': 4,
    'wae': 3,
    'wo': 0,
    'xh': 3,
    'xog': 3,
    'yo': 0,
    'zh': 0,
    'zu': 3
  };
  
  // utility functions for plural rules methods
  function isIn(n, list) {
    return list.indexOf(n) !== -1;
  }
  function isBetween(n, start, end) {
    return typeof n === typeof start && start <= n && n <= end;
  }
  
  // list of all plural rules methods:
  // map an integer to the plural form name to use
  const pluralRules = {
    '0': function() {
      return 'other';
    },
    '1': function(n) {
      if ((isBetween((n % 100), 3, 10))) {
        return 'few';
      }
      if (n === 0) {
        return 'zero';
      }
      if ((isBetween((n % 100), 11, 99))) {
        return 'many';
      }
      if (n === 2) {
        return 'two';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '2': function(n) {
      if (n !== 0 && (n % 10) === 0) {
        return 'many';
      }
      if (n === 2) {
        return 'two';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '3': function(n) {
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '4': function(n) {
      if ((isBetween(n, 0, 1))) {
        return 'one';
      }

      return 'other';
    },
    '5': function(n) {
      if ((isBetween(n, 0, 2)) && n !== 2) {
        return 'one';
      }
      return 'other';
    },
    '6': function(n) {
      if (n === 0) {
        return 'zero';
      }
      if ((n % 10) === 1 && (n % 100) !== 11) {
        return 'one';
      }
      return 'other';
    },
    '7': function(n) {
      if (n === 2) {
        return 'two';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '8': function(n) {
      if ((isBetween(n, 3, 6))) {
        return 'few';
      }
      if ((isBetween(n, 7, 10))) {
        return 'many';
      }
      if (n === 2) {
        return 'two';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '9': function(n) {
      if (n === 0 || n !== 1 && (isBetween((n % 100), 1, 19))) {
        return 'few';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '10': function(n) {
      if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19))) {
        return 'few';
      }
      if ((n % 10) === 1 && !(isBetween((n % 100), 11, 19))) {
        return 'one';
      }
      return 'other';
    },
    '11': function(n) {
      if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14))) {
        return 'few';
      }
      if ((n % 10) === 0 ||
          (isBetween((n % 10), 5, 9)) ||
          (isBetween((n % 100), 11, 14))) {
        return 'many';
      }
      if ((n % 10) === 1 && (n % 100) !== 11) {
        return 'one';
      }
      return 'other';
    },
    '12': function(n) {
      if ((isBetween(n, 2, 4))) {
        return 'few';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '13': function(n) {
      if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14))) {
        return 'few';
      }
      if (n !== 1 && (isBetween((n % 10), 0, 1)) ||
          (isBetween((n % 10), 5, 9)) ||
          (isBetween((n % 100), 12, 14))) {
        return 'many';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '14': function(n) {
      if ((isBetween((n % 100), 3, 4))) {
        return 'few';
      }
      if ((n % 100) === 2) {
        return 'two';
      }
      if ((n % 100) === 1) {
        return 'one';
      }
      return 'other';
    },
    '15': function(n) {
      if (n === 0 || (isBetween((n % 100), 2, 10))) {
        return 'few';
      }
      if ((isBetween((n % 100), 11, 19))) {
        return 'many';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '16': function(n) {
      if ((n % 10) === 1 && n !== 11) {
        return 'one';
      }
      return 'other';
    },
    '17': function(n) {
      if (n === 3) {
        return 'few';
      }
      if (n === 0) {
        return 'zero';
      }
      if (n === 6) {
        return 'many';
      }
      if (n === 2) {
        return 'two';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '18': function(n) {
      if (n === 0) {
        return 'zero';
      }
      if ((isBetween(n, 0, 2)) && n !== 0 && n !== 2) {
        return 'one';
      }
      return 'other';
    },
    '19': function(n) {
      if ((isBetween(n, 2, 10))) {
        return 'few';
      }
      if ((isBetween(n, 0, 1))) {
        return 'one';
      }
      return 'other';
    },
    '20': function(n) {
      if ((isBetween((n % 10), 3, 4) || ((n % 10) === 9)) && !(
          isBetween((n % 100), 10, 19) ||
          isBetween((n % 100), 70, 79) ||
          isBetween((n % 100), 90, 99)
          )) {
        return 'few';
      }
      if ((n % 1000000) === 0 && n !== 0) {
        return 'many';
      }
      if ((n % 10) === 2 && !isIn((n % 100), [12, 72, 92])) {
        return 'two';
      }
      if ((n % 10) === 1 && !isIn((n % 100), [11, 71, 91])) {
        return 'one';
      }
      return 'other';
    },
    '21': function(n) {
      if (n === 0) {
        return 'zero';
      }
      if (n === 1) {
        return 'one';
      }
      return 'other';
    },
    '22': function(n) {
      if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99))) {
        return 'one';
      }
      return 'other';
    },
    '23': function(n) {
      if ((isBetween((n % 10), 1, 2)) || (n % 20) === 0) {
        return 'one';
      }
      return 'other';
    },
    '24': function(n) {
      if ((isBetween(n, 3, 10) || isBetween(n, 13, 19))) {
        return 'few';
      }
      if (isIn(n, [2, 12])) {
        return 'two';
      }
      if (isIn(n, [1, 11])) {
        return 'one';
      }
      return 'other';
    }
  };
  
  function getPluralRule(code) {
    // return a function that gives the plural form name for a given integer
    const index = locales2rules[code.replace(/-.*$/, '')];
    if (!(index in pluralRules)) {
      return function() { return 'other'; };
    }
    return pluralRules[index];
  }
  
  // Safari 9 and iOS 9 does not support Intl
  const L20nIntl = typeof Intl !== 'undefined' ?
    Intl : {
    NumberFormat: function() {
      return {
        format: function(v) {
          return v;
        }
      };
    }
  };
  
  class Context {
    constructor(env, langs, resIds) {
      this.langs = langs;
      this.resIds = resIds;
      this.env = env;
      this.emit = (type, evt) => env.emit(type, evt, this);
    }
  
    _formatTuple(lang, args, entity, id, key) {
      try {
        return format(this, lang, args, entity);
      } catch (err) {
        err.id = key ? id + '::' + key : id;
        err.lang = lang;
        this.emit('resolveerror', err);
        return [{ error: err }, err.id];
      }
    }
  
    _formatEntity(lang, args, entity, id) {
      const [, value] = this._formatTuple(lang, args, entity, id);
  
      const formatted = {
        value,
        attrs: null,
      };
  
      if (entity.attrs) {
        formatted.attrs = Object.create(null);
        for (let key in entity.attrs) {
          /* jshint -W089 */
          const [, attrValue] = this._formatTuple(
            lang, args, entity.attrs[key], id, key);
          formatted.attrs[key] = attrValue;
        }

      }

  
      return formatted;
    }
  
    _formatValue(lang, args, entity, id) {
      return this._formatTuple(lang, args, entity, id)[1];
    }
  
    fetch(langs = this.langs) {
      if (langs.length === 0) {
        return Promise.resolve(langs);

      }

  
      return Promise.all(
        this.resIds.map(
          resId => this.env._getResource(langs[0], resId))
      ).then(() => langs);
    }
  
    _resolve(langs, keys, formatter, prevResolved) {
      const lang = langs[0];
  
      if (!lang) {
        return reportMissing.call(this, keys, formatter, prevResolved);

      }

  
      let hasUnresolved = false;
  
      const resolved = keys.map((key, i) => {
        if (prevResolved && prevResolved[i] !== undefined) {
          return prevResolved[i];
        }
        const [id, args] = Array.isArray(key) ?
          key : [key, undefined];
        const entity = this._getEntity(lang, id);
  
        if (entity) {
          return formatter.call(this, lang, args, entity, id);
        }
  
        this.emit('notfounderror',
          new L10nError('"' + id + '"' + ' not found in ' + lang.code,
            id, lang));
        hasUnresolved = true;
      });
  
      if (!hasUnresolved) {
        return resolved;

      }

  
      return this.fetch(langs.slice(1)).then(
        nextLangs => this._resolve(nextLangs, keys, formatter, resolved));
    }
  
    formatEntities(...keys) {
      return this.fetch().then(
        langs => this._resolve(langs, keys, this._formatEntity));
    }
  
    formatValues(...keys) {
      return this.fetch().then(
        langs => this._resolve(langs, keys, this._formatValue));
    }
  
    _getEntity(lang, id) {
      const cache = this.env.resCache;
  
      // Look for `id` in every resource in order.
      for (let i = 0, resId; resId = this.resIds[i]; i++) {
        const resource = cache.get(resId + lang.code + lang.src);
        if (resource instanceof L10nError) {
          continue;
        }
        if (id in resource) {
          return resource[id];
        }

      }

      return undefined;
    }
  
    _getNumberFormatter(lang) {
      if (!this.env.numberFormatters) {
        this.env.numberFormatters = new Map();

      }

      if (!this.env.numberFormatters.has(lang)) {
        const formatter = L20nIntl.NumberFormat(lang);
        this.env.numberFormatters.set(lang, formatter);
        return formatter;

      }

      return this.env.numberFormatters.get(lang);
    }
  
    // XXX in the future macros will be stored in localization resources together 
    // with regular entities and this method will not be needed anymore
    _getMacro(lang, id) {
      switch(id) {
        case 'plural':
          return getPluralRule(lang.code);
        default:
          return undefined;

      }

    }
  
  }
  
  function reportMissing(keys, formatter, resolved) {
    const missingIds = new Set();
  
    keys.forEach((key, i) => {
      if (resolved && resolved[i] !== undefined) {
        return;

      }

      const id = Array.isArray(key) ? key[0] : key;
      missingIds.add(id);
      resolved[i] = formatter === this._formatValue ?
        id : {value: id, attrs: null};
    });
  
    this.emit('notfounderror', new L10nError(
      '"' + Array.from(missingIds).join(', ') + '"' +
      ' not found in any language', missingIds));
  
    return resolved;
  }
  
  var MAX_PLACEABLES = 100;
  
  var PropertiesParser = {
    patterns: null,
    entryIds: null,
    emit: null,
  
    init: function() {
      this.patterns = {
        comment: /^\s*#|^\s*$/,
        entity: /^([^=\s]+)\s*=\s*(.*)$/,
        multiline: /[^\\]\\$/,
        index: /\{\[\s*(\w+)(?:\(([^\)]*)\))?\s*\]\}/i,
        unicode: /\\u([0-9a-fA-F]{1,4})/g,
        entries: /[^\r\n]+/g,
        controlChars: /\\([\\\n\r\t\b\f\{\}\"\'])/g,
        placeables: /\{\{\s*([^\s]*?)\s*\}\}/,
      };

    },

  
    parse: function(emit, source) {
      if (!this.patterns) {
        this.init();

      }

      this.emit = emit;
  
      var entries = {};
  
      var lines = source.match(this.patterns.entries);
      if (!lines) {
        return entries;

      }

      for (var i = 0; i < lines.length; i++) {
        var line = lines[i];
  
        if (this.patterns.comment.test(line)) {
          continue;
        }
  
        while (this.patterns.multiline.test(line) && i < lines.length) {
          line = line.slice(0, -1) + lines[++i].trim();
        }
  
        var entityMatch = line.match(this.patterns.entity);
        if (entityMatch) {
          try {
            this.parseEntity(entityMatch[1], entityMatch[2], entries);
          } catch (e) {
            if (!this.emit) {
              throw e;
            }
          }
        }

      }

      return entries;

    },

  
    parseEntity: function(id, value, entries) {
      var name, key;
  
      var pos = id.indexOf('[');
      if (pos !== -1) {
        name = id.substr(0, pos);
        key = id.substring(pos + 1, id.length - 1);
      } else {
        name = id;
        key = null;

      }

  
      var nameElements = name.split('.');
  
      if (nameElements.length > 2) {
        throw this.error('Error in ID: "' + name + '".' +
            ' Nested attributes are not supported.');

      }

  
      var attr;
      if (nameElements.length > 1) {
        name = nameElements[0];
        attr = nameElements[1];
  
        if (attr[0] === '$') {
          throw this.error('Attribute can\'t start with "$"');
        }
      } else {
        attr = null;

      }

  
      this.setEntityValue(name, attr, key, this.unescapeString(value), entries);

    },

  
    setEntityValue: function(id, attr, key, rawValue, entries) {
      var value = rawValue.indexOf('{{') > -1 ?
        this.parseString(rawValue) : rawValue;
  
      var isSimpleValue = typeof value === 'string';
      var root = entries;
  
      var isSimpleNode = typeof entries[id] === 'string';
  
      if (!entries[id] && (attr || key || !isSimpleValue)) {
        entries[id] = Object.create(null);
        isSimpleNode = false;

      }

  
      if (attr) {
        if (isSimpleNode) {
          const val = entries[id];
          entries[id] = Object.create(null);
          entries[id].value = val;
        }
        if (!entries[id].attrs) {
          entries[id].attrs = Object.create(null);
        }
        if (!entries[id].attrs && !isSimpleValue) {
          entries[id].attrs[attr] = Object.create(null);
        }
        root = entries[id].attrs;
        id = attr;

      }

  
      if (key) {
        isSimpleNode = false;
        if (typeof root[id] === 'string') {
          const val = root[id];
          root[id] = Object.create(null);
          root[id].index = this.parseIndex(val);
          root[id].value = Object.create(null);
        }
        root = root[id].value;
        id = key;
        isSimpleValue = true;

      }

  
      if (isSimpleValue) {
        if (id in root) {
          throw this.error('Duplicated id: ' + id);
        }
        root[id] = value;
      } else {
        if (!root[id]) {
          root[id] = Object.create(null);
        }
        root[id].value = value;

      }

    },

  
    parseString: function(str) {
      var chunks = str.split(this.patterns.placeables);
      var complexStr = [];
  
      var len = chunks.length;
      var placeablesCount = (len - 1) / 2;
  
      if (placeablesCount >= MAX_PLACEABLES) {
        throw this.error('Too many placeables (' + placeablesCount +
                            ', max allowed is ' + MAX_PLACEABLES + ')');

      }

  
      for (var i = 0; i < chunks.length; i++) {
        if (chunks[i].length === 0) {
          continue;
        }
        if (i % 2 === 1) {
          complexStr.push({type: 'idOrVar', name: chunks[i]});
        } else {
          complexStr.push(chunks[i]);
        }

      }

      return complexStr;

    },

  
    unescapeString: function(str) {
      if (str.lastIndexOf('\\') !== -1) {
        str = str.replace(this.patterns.controlChars, '$1');

      }

      return str.replace(this.patterns.unicode, function(match, token) {
        return String.fromCodePoint(parseInt(token, 16));
      });
    },
  
    parseIndex: function(str) {
      var match = str.match(this.patterns.index);
      if (!match) {
        throw new L10nError('Malformed index');

      }

      if (match[2]) {
        return [{
          type: 'call',
          expr: {
            type: 'prop',
            expr: {
              type: 'glob',
              name: 'cldr'
            },
            prop: 'plural',
            cmpt: false
          }, args: [{
            type: 'idOrVar',
            name: match[2]
          }]
        }];
      } else {
        return [{type: 'idOrVar', name: match[1]}];