ambari/ambari-web/app/views/main/admin/stack_versions/menu.js

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

var App = require('app');

App.StackVersionMenuView = Em.CollectionView.extend({
  tagName: 'ul',
  classNames: ["nav", "nav-tabs"],
  content:function(){
    var menuItems = [
      { label: Em.I18n.t('common.installed'), routing:'versions', url:"versions", active:"active"},
      { label: Em.I18n.t('admin.stackVersions.updateTab.title.not.available'), routing:'updates', url:"versions/updates"}
    ];
    return menuItems;
  }.property(),

  init: function(){ this._super(); this.activateView(); },

  activateView:function () {
    $.each(this._childViews, function () {
      this.set('active', (document.URL.endsWith(this.get('content.routing')) ? "active" : ""));
    });
  }.observes('App.router.location.lastSetURL'),

  deactivateChildViews: function() {
    $.each(this._childViews, function(){
      this.set('active', "");
    });
  },

  itemViewClass: Em.View.extend({
    classNameBindings: ["active"],
    active: "",
    newRepoCount: function() {
      return App.RepositoryVersion.find().filterProperty('stackVersion', null).get('length');
    }.property('controller.dataIsLoaded'),
    label: function() {
      if (this.get('content.routing') == 'updates') {
        if (this.get('newRepoCount') > 0) {
          this.set("active", "");
          return  Em.I18n.t('admin.stackVersions.updateTab.title.available').format(this.get('newRepoCount'))
        } else {
          this.set("active", 'not-active-link');
        }
      }
      return this.get('content.label')
    }.property('view.content.label', 'newRepoCount'),

    template: Ember.Handlebars.compile('<a href="#/main/admin/{{unbound view.content.url}}"> {{view.label}}</a>')
  })
});