Daniel@0: "use strict";
Daniel@0: 
Daniel@0: App.module("ContextModule", function(ContextModule, App, Backbone, Marionette, $, _, Logger) {
Daniel@0: 
Daniel@0:     // Define private variables
Daniel@0:     var logger = null;
Daniel@0: 
Daniel@0:     ContextModule.addInitializer(function(options){
Daniel@0: 
Daniel@0:         logger = Logger.get("ContextModule.AppContextManager");
Daniel@0:         logger.setLevel(Logger.DEBUG);
Daniel@0: 
Daniel@0:         /**
Daniel@0:          * AppContextManager saves the given app context into the local storage and restores it
Daniel@0:          */
Daniel@0:         ContextModule.AppContextManager = Backbone.Marionette.Object.extend({
Daniel@0: 
Daniel@0:             /**
Daniel@0:              * @memberOf App.ContextModule.AppContextManager
Daniel@0:              */
Daniel@0:             initialize: function() {
Daniel@0:                 this.defaultSerializedAppContexts = {
Daniel@0:                         "": {
Daniel@0:                             stateHistory: {
Daniel@0:                                 currentSerializedState: {
Daniel@0:                                     musicCollectionGrid: {
Daniel@0:                                         selectedEntityConfigClientId: "def0",
Daniel@0:                                         entityConfigs: [
Daniel@0:                                                 {clientId: "def0", parameters: {"library": "CHARM", composer: "Mozart"}},
Daniel@0:                                                 {clientId: "def1", parameters: {"library": "CHARM", composer: "Haydn"}}
Daniel@0:                                             ],
Daniel@0:                                         viewConfigs: [
Daniel@0:                                               {clientId: "def2", parameters: {kind: "list"}},
Daniel@0:                                               {clientId: "def3", parameters: {kind: "tonic-histogram"}}
Daniel@0:                                             ],
Daniel@0:                                     },
Daniel@0:                                     musicRecordingGrid: {
Daniel@0:                                         viewConfigs: [
Daniel@0:                                               {clientId: "def4", parameters: {kind: "properties"}},
Daniel@0:                                               {clientId: "def5", parameters: {kind: "midi-pitch-histogram"}},
Daniel@0:                                           ],
Daniel@0:                                     }
Daniel@0:                                 }
Daniel@0:                             }
Daniel@0:                         },
Daniel@0:                         "empty": {},
Daniel@0:                     };
Daniel@0:             },
Daniel@0: 
Daniel@0:             /**
Daniel@0:              * @memberOf App.ContextModule.AppContextManager
Daniel@0:              * @returns {Boolean} true if success, false if there was a problem
Daniel@0:              */
Daniel@0:             saveToStorage: function(appContext) {
Daniel@0:                 logger.debug("Saving to storage")
Daniel@0:                 return App.DataModule.Storage.setObjCache(ContextModule, "context", appContext.serialize());
Daniel@0:             },
Daniel@0: 
Daniel@0:             /**
Daniel@0:              * @memberOf App.ContextModule.AppContextManager
Daniel@0:              * @returns {Boolean} true if success, false if there was an error, and a default was restored
Daniel@0:              */
Daniel@0:             restoreFromStorage: function(appContext, nameOfDefaultIfFailure) {
Daniel@0:                 logger.debug("Restoring from storage")
Daniel@0:                 var serializedAppContext = App.DataModule.Storage.getObjCache(ContextModule, "context");
Daniel@0:                 if (!serializedAppContext) {
Daniel@0:                     this.restoreDefault(appContext, nameOfDefaultIfFailure);
Daniel@0:                     return false;
Daniel@0:                 } else {
Daniel@0:                     appContext.unserialize(serializedAppContext);
Daniel@0:                     return true;
Daniel@0:                 };
Daniel@0:             },
Daniel@0: 
Daniel@0:             restoreDefault: function(appContext, nameOfDefault) {
Daniel@0:                 var name = nameOfDefault;
Daniel@0:                 if (!name) {
Daniel@0:                     name = "";
Daniel@0:                 }
Daniel@0:                 logger.debug("Restoring default");
Daniel@0:                 appContext.unserialize(this.defaultSerializedAppContexts[name]);
Daniel@0:             }
Daniel@0:         });
Daniel@0:     });
Daniel@0: }, Logger);