Daniel@0: "use strict";
Daniel@0: 
Daniel@0: App.module("DataModule", function(DataModule, App, Backbone, Marionette, $, _, Logger) {
Daniel@0: 
Daniel@0:     DataModule.addInitializer(function(options){
Daniel@0:         
Daniel@0:         DataModule.ModelWithHashableAttributes = Backbone.Model.extend({
Daniel@0:             defaultOptions: {
Daniel@0:                 attributesToExcludeFromHash: null,
Daniel@0:                 customHashSuffixGenerator: null // function(attributes)
Daniel@0:             },
Daniel@0:             
Daniel@0:             initialize: function(attributes, options) {
Daniel@0:                 this.listenTo(this, "change", this.dropCachedHash);
Daniel@0:                 this.options = _.defaults(options || {}, this.defaultOptions);
Daniel@0:             },
Daniel@0:             
Daniel@0:             dropCachedHash: function() {
Daniel@0:                 this._cachedHash = undefined;
Daniel@0:             },
Daniel@0: 
Daniel@0:             getHash: function() {
Daniel@0:                 if (!this._cachedHash) {
Daniel@0:                     var mixOfAttributesAndAttributeHashes = {};
Daniel@0:                     for (var attributeName in this.attributes) {
Daniel@0:                         if (this.options.attributesToExcludeFromHash && _.contains(this.options.attributesToExcludeFromHash, attributeName)) {
Daniel@0:                             continue;
Daniel@0:                         }
Daniel@0:                         if (this.attributes.hasOwnProperty(attributeName)) {
Daniel@0:                             var attribute = this.attributes[attributeName];
Daniel@0:                             if (attribute && attribute.getHash) {
Daniel@0:                                 mixOfAttributesAndAttributeHashes[attributeName] = attribute.getHash();
Daniel@0:                             } else {
Daniel@0:                                 mixOfAttributesAndAttributeHashes[attributeName] = attribute;
Daniel@0:                             }
Daniel@0:                         }
Daniel@0:                     }
Daniel@0:                     var newHash = JSON.stringify(mixOfAttributesAndAttributeHashes);
Daniel@0:                     if (this.options.customHashSuffixGenerator && _.isFunction(this.options.customHashSuffixGenerator)) {
Daniel@0:                         newHash += this.options.customHashSuffixGenerator(this.attributes);
Daniel@0:                     }
Daniel@0:                     this._cachedHash = newHash;
Daniel@0:                 }
Daniel@0:                 return this._cachedHash;
Daniel@0:             }
Daniel@0:         });
Daniel@0:     });
Daniel@0: }, Logger);