ember-intl/lib/broccoli/cldr-writer.js

Ember toolbox for internationalization.

/* jshint node: true */

'use strict';

/**
* Copyright 2015, Yahoo! Inc.
* Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
*/

var extractCLDRData = require('formatjs-extract-cldr-data');
var CachingWriter = require('broccoli-caching-writer');
var assign = require('lodash/assign');
var mkdirp = require('mkdirp');
var fs = require('fs');

// Production steps of ECMA-262, Edition 6, 22.1.2.1
// Reference: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.from
if (!Array.from) {
  Array.from = (function () {
    var toStr = Object.prototype.toString;
    var isCallable = function (fn) {
      return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
    };
    var toInteger = function (value) {
      var number = Number(value);
      if (isNaN(number)) { return 0; }
      if (number === 0 || !isFinite(number)) { return number; }
      return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
    };
    var maxSafeInteger = Math.pow(2, 53) - 1;
    var toLength = function (value) {
      var len = toInteger(value);
      return Math.min(Math.max(len, 0), maxSafeInteger);
    };

    // The length property of the from method is 1.
    return function from(arrayLike/*, mapFn, thisArg */) {
      // 1. Let C be the this value.
      var C = this;

      // 2. Let items be ToObject(arrayLike).
      var items = Object(arrayLike);

      // 3. ReturnIfAbrupt(items).
      if (arrayLike == null) {
        throw new TypeError("Array.from requires an array-like object - not null or undefined");
      }

      // 4. If mapfn is undefined, then let mapping be false.
      var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
      var T;
      if (typeof mapFn !== 'undefined') {
        // 5. else
        // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
        if (!isCallable(mapFn)) {
          throw new TypeError('Array.from: when provided, the second argument must be a function');
        }

        // 5. b. If thisArg was supplied, let T be thisArg; else let T be undefined.
        if (arguments.length > 2) {
          T = arguments[2];
        }
      }

      // 10. Let lenValue be Get(items, "length").
      // 11. Let len be ToLength(lenValue).
      var len = toLength(items.length);

      // 13. If IsConstructor(C) is true, then
      // 13. a. Let A be the result of calling the [[Construct]] internal method of C with an argument list containing the single item len.
      // 14. a. Else, Let A be ArrayCreate(len).
      var A = isCallable(C) ? Object(new C(len)) : new Array(len);

      // 16. Let k be 0.
      var k = 0;
      // 17. Repeat, while k < len… (also steps a - h)
      var kValue;
      while (k < len) {
        kValue = items[k];
        if (mapFn) {
          A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
        } else {
          A[k] = kValue;
        }
        k += 1;
      }
      // 18. Let putStatus be Put(A, "length", len, true).
      A.length = len;
      // 20. Return A.
      return A;
    };
  }());
}

var sliceToArray = function() {
  function sliceIterator(arr, i) {
    var _arr = [];
    var _n = true;
    var _d = false;
    var _e = undefined;
    try {
      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
        _arr.push(_s.value);
        if (i && _arr.length === i) break;
      }
    } catch (err) {
      _d = true;
      _e = err;
    } finally {
      try {
        if (!_n && _i["return"]) _i["return"]();
      } finally {
        if (_d) throw _e;
      }
    }
    return _arr;
  }
  return function(arr, i) {
    if (Array.isArray(arr)) {
      return arr;
    } else if (Symbol.iterator in Object(arr)) {
      return sliceIterator(arr, i);
    } else {
      throw new TypeError("Invalid attempt to destructure non-iterable instance");
    }
  };
}();

function toConsumeableArray(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
      arr2[i] = arr[i];
    }

    return arr2;
  }
  else {
    return Array.from(arr);
  }
}

Plugin.prototype = Object.create(CachingWriter.prototype);
Plugin.prototype.constructor = Plugin;

function Plugin(inputNodes, options) {
  options = options || {};

  CachingWriter.call(this, inputNodes, {
    annotation: options.annotation
  });

  this.destDir = options.destDir;
  delete options.destDir;

  this.options = assign({
    locales: null,
    pluralRules: true,
    relativeFields: true,
    prelude: '',
    wrapEntry: undefined
  }, options);
}

Plugin.prototype.build = function() {
  var options = this.options;
  var destPath = this.outputPath + '/' + this.destDir;
  var cldrData = extractCLDRData(options);

  var cldrDataByLocale = new Map(Object.keys(cldrData).map(function (locale) {
    return [locale, cldrData[locale]];
  }));

  var cldrDataByLang = [].concat(toConsumeableArray(cldrDataByLocale)).reduce(function (map, _ref) {
    var _ref2 = sliceToArray(_ref, 2);
    var locale = _ref2[0];
    var data = _ref2[1];
    var _locale$split = locale.split('-');
    var _locale$split2 = sliceToArray(_locale$split, 1);
    var lang = _locale$split2[0];
    var langData = map.get(lang) || [];

    return map.set(lang, langData.concat(data));
  }, new Map());

  mkdirp.sync(destPath);

  cldrDataByLang.forEach(function(cldrData, lang) {
    if (typeof options.wrapEntry === 'function') {
      cldrData = options.wrapEntry(cldrData);
    }

    var outFile = destPath + '/' + lang.toLocaleLowerCase() + '.js';

    fs.writeFileSync(outFile, options.prelude.concat(cldrData), { encoding: 'utf8' });
  });
}

module.exports = Plugin;