examples/hoofbeats/javascripts/library.js

   1 /* vi: set et sw=4 ts=4 si: */
   2 (function(win, $) {
   3     var library = function() {
   4         // For readability:
   5         this.initialized = false;
   6
   7         this.fetchCount = 100;
   8         this.fetchOffset = 0;
   9         this.mediaItems = [];
  10
  11         this.initialize = function() {
  12             if (this.initialized)
  13                 return;
  14
  15             if (win.tizen === undefined) {
  16                 throw Error("You need the Tizen web API  to run Hoofbeats.");
  17             }
  18
  19             this.audioTypeFilter = new tizen.AttributeFilter(
  20                 "type", "EXACTLY", "AUDIO");
  21             this.videoTypeFilter = new tizen.AttributeFilter(
  22                 "type", "EXACTLY", "VIDEO");
  23             this.typeFilter = new tizen.CompositeFilter(
  24                 "UNION", [this.audioTypeFilter, this.videoTypeFilter]);
  25         };
  26
  27         this.scan = function() {
  28             this.deferred = new $.Deferred();
  29             this.initialize()
  30
  31             this.mediaItems = [];
  32             this.fetchOffset = 0;
  33
  34             tizen.content.find(
  35                 this.findCB.bind(this),
  36                 this.errorCB.bind(this),
  37                 null,
  38                 this.typeFilter,
  39                 null,
  40                 this.fetchCount,
  41                 this.fetchOffset);
  42
  43             return this.deferred.promise();
  44         };
  45
  46         this.errorCB = function(error) {
  47             console.log("Error: " + error.name);
  48             this.deferred.reject();
  49             throw new Error(error.name);
  50         };
  51
  52         this.findCB = function(items) {
  53             var self = this;
  54
  55             items.forEach(function(item, index, items) {
  56                 self.mediaItems.push(item);
  57                 win.MusicBrainz.getArtist(item.artists[0]).done(function(data) {
  58                     console.log(data);
  59                 });
  60             });
  61
  62             if (items.length == this.fetchCount) {
  63                 // There *might* be more items.
  64                 this.fetchOffset += this.fetchCount;
  65                 tizen.content.find(
  66                     this.findCB.bind(this),
  67                     this.errorCB.bind(this),
  68                     null,
  69                     this.typeFilter,
  70                     null,
  71                     this.fetchCount,
  72                     this.fetchOffset);
  73             } else {
  74                 self.deferred.resolve();
  75             }
  76         };
  77     };
  78
  79     library.prototype = {
  80         set initialized(value) {this._initialized = value; },
  81         get initialized() { return this._initialized; }
  82     };
  83
  84     win.HoofbeatsLibrary = library;
  85 }(window, jQuery));