analytics/webcontent/bi/js/gemini/app/EventChannelRouter.js

'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (C) Copyright IBM Corp. 2015, 2020
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
/**
 * This class creates a private event router for particular events while a global event router is used for rest of events.
 *
 * SamePage scope of private event router is supported. It can be extended in the future for between two widgets, and etc..
 */
define(['underscore', './EventRouter'], function (_, EventRouter) {

	var EventChannelRouter = EventRouter.extend({

		//global event router
		globalEventRouter: null,

		//array of private event names to the channel
		eventNames: null,

		//private channel id
		channelId: null,

		//pretty name
		_alias: null,

		init: function init(options) {
			EventChannelRouter.inherited('init', this, arguments);

			this.globalEventRouter = options.globalEventRouter;
			this.channelId = options.channelId;
			this.eventNames = options.eventNames;
			this._alias = options.alias;
		},

		_isPrivateEvent: function _isPrivateEvent(eventName) {
			return _.find(this.eventNames, function (name) {
				return name === eventName;
			});
		},

		_getChanneledEventName: function _getChanneledEventName(name) {
			return this.channelId + '_' + name;
		},

		on: function on(eventName, handler, context) {
			if (this._isPrivateEvent(eventName)) {
				EventChannelRouter.inherited('on', this, [this._getChanneledEventName(eventName), handler, context]);
			} else {
				this.globalEventRouter.on(eventName, handler, context);
			}
		},

		off: function off(eventName, handler, context) {
			if (this._isPrivateEvent(eventName)) {
				EventChannelRouter.inherited('off', this, [this._getChanneledEventName(eventName), handler, context]);
			} else {
				this.globalEventRouter.off(eventName, handler, context);
			}
		},

		trigger: function trigger(eventName, event) {
			if (this._isPrivateEvent(eventName)) {
				EventChannelRouter.inherited('trigger', this, [this._getChanneledEventName(eventName), event]);
			} else {
				this.globalEventRouter.trigger(eventName, event);
			}
		}
	});

	return EventChannelRouter;
});
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