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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 /**
      6  * @fileoverview Keeps track of all the existing PlayerInfo and
      7  * audio stream objects and is the entry-point for messages from the backend.
      8  *
      9  * The events captured by Manager (add, remove, update) are relayed
     10  * to the clientRenderer which it can choose to use to modify the UI.
     11  */
     12 var Manager = (function() {
     13   'use strict';
     14 
     15   function Manager(clientRenderer) {
     16     this.players_ = {};
     17     this.audioComponents_ = [];
     18     this.clientRenderer_ = clientRenderer;
     19   }
     20 
     21   Manager.prototype = {
     22     /**
     23      * Updates an audio-component.
     24      * @param componentType Integer AudioComponent enum value; must match values
     25      * from the AudioLogFactory::AudioComponent enum.
     26      * @param componentId The unique-id of the audio-component.
     27      * @param componentData The actual component data dictionary.
     28      */
     29     updateAudioComponent: function(componentType, componentId, componentData) {
     30       if (!(componentType in this.audioComponents_))
     31         this.audioComponents_[componentType] = {};
     32       if (!(componentId in this.audioComponents_[componentType])) {
     33         this.audioComponents_[componentType][componentId] = componentData;
     34       } else {
     35         for (var key in componentData) {
     36           this.audioComponents_[componentType][componentId][key] =
     37               componentData[key];
     38         }
     39       }
     40       this.clientRenderer_.audioComponentAdded(
     41           componentType, this.audioComponents_[componentType]);
     42     },
     43 
     44     /**
     45      * Removes an audio-stream from the manager.
     46      * @param id The unique-id of the audio-stream.
     47      */
     48     removeAudioComponent: function(componentType, componentId) {
     49       if (!(componentType in this.audioComponents_) ||
     50           !(componentId in this.audioComponents_[componentType])) {
     51         return;
     52       }
     53 
     54       delete this.audioComponents_[componentType][componentId];
     55       this.clientRenderer_.audioComponentRemoved(
     56           componentType, this.audioComponents_[componentType]);
     57     },
     58 
     59     /**
     60      * Adds a player to the list of players to manage.
     61      */
     62     addPlayer: function(id) {
     63       if (this.players_[id]) {
     64         return;
     65       }
     66       // Make the PlayerProperty and add it to the mapping
     67       this.players_[id] = new PlayerInfo(id);
     68       this.clientRenderer_.playerAdded(this.players_, this.players_[id]);
     69     },
     70 
     71     /**
     72      * Attempts to remove a player from the UI.
     73      * @param id The ID of the player to remove.
     74      */
     75     removePlayer: function(id) {
     76       delete this.players_[id];
     77       this.clientRenderer_.playerRemoved(this.players_, this.players_[id]);
     78     },
     79 
     80     updatePlayerInfoNoRecord: function(id, timestamp, key, value) {
     81       if (!this.players_[id]) {
     82         console.error('[updatePlayerInfo] Id ' + id + ' does not exist');
     83         return;
     84       }
     85 
     86       this.players_[id].addPropertyNoRecord(timestamp, key, value);
     87       this.clientRenderer_.playerUpdated(this.players_,
     88                                          this.players_[id],
     89                                          key,
     90                                          value);
     91     },
     92 
     93     /**
     94      *
     95      * @param id The unique ID that identifies the player to be updated.
     96      * @param timestamp The timestamp of when the change occured.  This
     97      * timestamp is *not* normalized.
     98      * @param key The name of the property to be added/changed.
     99      * @param value The value of the property.
    100      */
    101     updatePlayerInfo: function(id, timestamp, key, value) {
    102       if (!this.players_[id]) {
    103         console.error('[updatePlayerInfo] Id ' + id + ' does not exist');
    104         return;
    105       }
    106 
    107       this.players_[id].addProperty(timestamp, key, value);
    108       this.clientRenderer_.playerUpdated(this.players_,
    109                                          this.players_[id],
    110                                          key,
    111                                          value);
    112     }
    113   };
    114 
    115   return Manager;
    116 }());
    117