Phonegap contacts as backbone collection store

backbone-phonegapcontacts.js

var PhonegapContactStore = function(){};

_.extend(PhonegapContactStore.prototype,{
	create: $.noop,
	update: $.noop,
	find: function(data, cb) {
		// If we are not on device with contacts just return callback
		if (typeof ContactFindOptions === "undefined") {
			if (cb) cb();
			return;
		}

		var fields = ['name', 'displayName', 'emails'],
			options = new ContactFindOptions(),
			callback = cb || $.noop,
			self = this,
			resp = [];

		options.filter = data.filter || '';
		options.multiple = data.multiple || false;


		var onSuccess = function(contacts) {
			var self = this;

			resp = _.map(_.filter(contacts, function(contact) {
				return contact.emails && contact.emails.length;
			}), function(contact) {
					var name = contact.name,
						email;

					email = _.findWhere(contact.emails, {'type': 'work'}) || contact.emails[0];

					return {
						firstName: name.givenName || '',
						lastName:  name.familyName || '',
						email: email.value
					}
				}
			);

			callback(resp);
		};

		var onError = function(error) {
			console.log(error);
			callback(error);
		};

		navigator.contacts.find(fields, _.bind(onSuccess, this), _.bind(onError, this), options);
	},
	findAll: $.noop,
	destroy: $.noop
});


_.extend(Backbone, {
	// Override `Backbone.sync` to use delegate to the model or collection's
	// *phonegapStore* property, which should be an instance of `Store`.
	contactSync: function(method, model, options) {
		var store = model.phonegapStore || model.collection.phonegapStore;

		if (method === 'read') {
			store.find(options.data, function(resp) {
				_.isArray(resp) ? options.success(resp) : options.error(resp);
			});
		}
	}
});