Titanium Event Management

event.js

/*global Ti*/

var _ = require('/application/shared/lib/underscore'); // needs underscore

exports.attach = function (proxy, to_attach, named, prefix) {
	'use strict';

	var reservedEvents = ['pause', 'paused', 'resume', 'resumed', 'orientationchange'];

	if (proxy && _.size(to_attach)) {
		prefix = (prefix ? prefix + ':' : '');
		proxy._events = (function () {
			var _events = proxy._events || {};

			_.each(to_attach, function (callback, event) {
				if (_.has(named, event)) {
					_events[named[event]] = {
						name : prefix + event,
						method : callback
					};
				} else {
					_events[prefix + event] = callback;
				}
			});

			return _events;
		}());

		_.each(to_attach, function (callback, events) {
			_.each(events.split(','), function (event) {
				var _event = (_.contains(reservedEvents, event) ? event : prefix + event);

				proxy.addEventListener(_event, callback);
			});
		});
	}

	return proxy;
};

exports.detach = function (proxy, to_detach) {
	'use strict';

	if (proxy && _.has(proxy, '_events') && to_detach) {
		_.each(proxy._events, function (callback, event) {
			if (to_detach === event) {
				if (_.isFunction(callback)) {
					proxy.removeEventListener(event, callback);
				} else {
					proxy.removeEventListener(callback.name, callback.method);
				}

				proxy._events = _.omit(proxy._events, event);
			}
		});
	}
};