libzotero/lib/Events.js

javascript libZotero

'use strict';

var log = require('./Log.js').Logger('libZotero:Events');

var trigger = function trigger(eventType) {
	var data = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
	var filter = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;

	if (filter) {
		log.debug('filter is not false', 3);
		eventType += '_' + filter;
	}
	log.debug('Triggering eventful ' + eventType, 3);

	data.zeventful = true;
	// if(data.triggeringElement === null || data.triggeringElement === undefined){
	// 	data.triggeringElement = J('#eventful');
	// }

	try {
		if (Zotero.eventmanager.callbacks.hasOwnProperty(eventType)) {
			var callbacks = Zotero.eventmanager.callbacks[eventType];
			callbacks.forEach(function (callback) {
				var cdata = Z.extend({}, data, callback.data);
				var e = {
					data: cdata
				};
				callback.f(e);
			});
		}
	} catch (e) {
		log.error('failed triggering:' + eventType);
		log.error(e);
	}
};

var listen = function listen(events, handler, data, filter) {
	log.debug('Zotero.listen: ' + events, 3);
	//append filter to event strings if it's specified
	var eventsArray = events.split(' ');
	if (eventsArray.length > 0 && filter) {
		for (var i = 0; i < eventsArray.length; i++) {
			eventsArray[i] += '_' + filter;
		}
	}
	eventsArray.forEach(function (ev) {
		if (Zotero.eventmanager.callbacks.hasOwnProperty(ev)) {
			Zotero.eventmanager.callbacks[ev].push({
				data: data,
				f: handler
			});
		} else {
			Zotero.eventmanager.callbacks[ev] = [{
				data: data,
				f: handler
			}];
		}
	});
};

module.exports = { trigger: trigger, listen: listen };