examples/hoofbeats/javascripts/library.js

   1 /* vi: set et sw=4 ts=4 si: */
   2 (function(win, $) {
   3     var library = function() {
   4         // Private stuff
   5
   6         var p = {
   7             initialized: false,
   8             deferred: undefined,
   9             // Whether items should be resolved on MusicBrainz
  10             resolve: false,
  11             fetchCount: 100,
  12             fetchOffset: 0,
  13             oneTime: false,
  14             mediaItems: [],
  15
  16             errorCB: function(error) {
  17                 console.log("HoofbeatsLibrary.errorCB: " + error.name);
  18                 this.deferred.reject();
  19                 throw new Error(error.name);
  20             },
  21
  22             findCB: function(items) {
  23                 items.forEach(function(item, index, items) {
  24                     p.mediaItems.push(item);
  25                     if (p.resolve) {
  26                         win.MusicBrainz.getArtist(item.artists[0]).done(
  27                             function(data) {
  28                                 console.log(
  29                                     "HoofbeatsLibrary.findCB: " +
  30                                     "item resolved on MusicBrainz: " +
  31                                     data.name);
  32                             }
  33                         );
  34                     }
  35                 });
  36
  37                 if (items.length == p.fetchCount && !p.oneTime) {
  38                     // There *might* be more items.
  39                     p.fetchOffset += p.fetchCount;
  40                     tizen.content.find(
  41                         p.findCB.bind(this),
  42                         p.errorCB.bind(this),
  43                         null,
  44                         p.typeFilter,
  45                         null,
  46                         p.fetchCount,
  47                         p.fetchOffset);
  48                 } else {
  49                     p.deferred.resolve();
  50                 }
  51             }
  52         }; // p
  53
  54
  55         // Public stuff
  56
  57         return {
  58             initialize: function() {
  59                 if (p.initialized)
  60                     return;
  61
  62                 if (win.tizen === undefined) {
  63                     throw Error("You need the Tizen web API  to run Hoofbeats.");
  64                 }
  65
  66                 p.audioTypeFilter = new tizen.AttributeFilter(
  67                     "type", "EXACTLY", "AUDIO");
  68                 p.videoTypeFilter = new tizen.AttributeFilter(
  69                     "type", "EXACTLY", "VIDEO");
  70                 p.typeFilter = new tizen.CompositeFilter(
  71                     "UNION", [p.audioTypeFilter, p.videoTypeFilter]);
  72             },
  73
  74             scan: function(options) {
  75                 var opts = options || {};
  76                 if (opts.resolve !== undefined) {
  77                     p.resolve = opts.resolve;
  78                 }
  79
  80                 p.deferred = new $.Deferred();
  81                 this.initialize();
  82
  83                 p.mediaItems = [];
  84                 p.fetchOffset = 0;
  85
  86                 if (opts.count !== undefined) {
  87                     p.fetchCount = opts.count;
  88                     p.oneTime = true;
  89                 }
  90
  91                 tizen.content.find(
  92                     p.findCB.bind(this),
  93                     p.errorCB.bind(this),
  94                     null,
  95                     p.typeFilter,
  96                     null,
  97                     p.fetchCount,
  98                     p.fetchOffset);
  99
 100                 return p.deferred.promise();
 101             },
 102
 103             item: function(id) {
 104                 var ret;
 105
 106                 p.mediaItems.forEach(function(item, index, items) {
 107                     if (item.id == id)
 108                         ret = item;
 109                 });
 110
 111                 return ret;
 112             },
 113
 114             // Some simple getters
 115             getInitialized: function() { return p.initialized; },
 116             getItems: function() { return p.mediaItems; },
 117             getSize: function() { return p.mediaItems.length; },
 118             getResolve: function() {return p.resolve; }
 119         };
 120     };
 121
 122     win.HoofbeatsLibrary = library;
 123 }(window, jQuery));