localize-behavior.html

<!--
@license
Copyright (c) 2016 Convoo All Rights Reserved.
Use of this source code is governed by a MIT license that can be found in the
LICENSE file or at https://github.com/convoo/login-fire/blob/master/LICENSE.
-->
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../app-localize-behavior/app-localize-behavior.html">
<link rel="import" href="./locales.html">
<script>
  (function() {
    'use strict';

    window.Convoo = window.Convoo || {};

    /**
     * Behavior that brings localization ability to an element.
     * 
     * @polymerBehavior Convoo.LocalizeBehavior
     */
    Convoo.LocalizeBehaviorImpl = {

      properties: {
        /**
         * Sets the language to use.
         *
         * @type {String}
         */
        language: {
          type: String,
          value: 'en'
        },

        /**
         * Path to an external file containing locales. If the value is set, the
         * target file will be used instead of the default one _("locales.html")_.
         *
         * The target file must be in JSON format. Be sure the file is kept
         * during the build of your project. By default, the Polymer build pipe
         * loses JSON files during the optimization.
         *
         * For more detail about the file format, please read the
         * <a href="https://github.com/PolymerElements/app-localize-behavior">AppLocalizeBehavior</a>
         * documentation.
         *
         * @type {String}
         */
        localesFile: {
          type: String,
          observer: '_localesFileChanged'
        },
      },

      attached: function() {
        if (!this.localesFile || this.localesFile.trim().length == 0) {
          this.set('resources', window.Convoo._locales);
        }
      },

      /**
       * Loads locales file for internationalization.
       */
      _localesFileChanged: function() {
        if (this.localesFile && this.localesFile.trim().length != 0) {
          this.loadResources(this.resolveUrl(this.localesFile));
        }
      }
    };

    Convoo.LocalizeBehavior = [
      Polymer.AppLocalizeBehavior,
      Convoo.LocalizeBehaviorImpl
    ];

  }());
</script>