text: /**
   * Copyright 2015-2016, Google, Inc.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  'use strict';
  const url = require('url');
  
  /**
   * Class representing a Web App Manifest
   */
  class Manifest {
    constructor(manifestUrl, jsonManifest) {
      this.url = manifestUrl;
      this.raw = JSON.stringify(jsonManifest);
      this.name = jsonManifest.name;
      this.shortName = jsonManifest.short_name;
      this.description = jsonManifest.description;
      this.startUrl = jsonManifest.start_url;
      this.backgroundColor = jsonManifest.background_color;
      this.icons = jsonManifest.icons;
      this.scope = jsonManifest.scope;
    }
  
    getBestIcon() {
      function getIconSize(icon) {
        if (!icon.sizes) {
          return 0;
        }
        return parseInt(icon.sizes.substring(0, icon.sizes.indexOf('x')), 10);
      }
  
      if (!this.icons) {
        return null;
      }
  
      let bestIcon;
      let bestIconSize;
  
      this.icons.forEach(icon => {
        if (!bestIcon) {
          bestIcon = icon;
          bestIconSize = getIconSize(icon);
          return;
        }
  
        const iconSize = getIconSize(icon);
        if (iconSize > bestIconSize) {
          bestIcon = icon;
          bestIconSize = iconSize;
        }
      });
  
      return bestIcon;
    }
  
    /** Gets the Url for the largest icon in the Manifest */
    getBestIconUrl() {
      let bestIcon = this.getBestIcon();
      if (!bestIcon || !bestIcon.src) {
        return '';
      }
      return url.resolve(this.url, bestIcon.src);
    }
  }
  
  module.exports = Manifest;
  