enigma-bbs/core/events.js

77 lines
2.0 KiB
JavaScript
Raw Normal View History

2017-06-11 00:29:00 +00:00
/* jslint node: true */
'use strict';
const events = require('events');
const Log = require('./logger.js').log;
const SystemEvents = require('./system_events.js');
// deps
const _ = require('lodash');
module.exports = new (class Events extends events.EventEmitter {
constructor() {
super();
this.setMaxListeners(64); // :TODO: play with this...
}
getSystemEvents() {
return SystemEvents;
}
addListener(event, listener) {
Log.trace({ event: event }, 'Registering event listener');
return super.addListener(event, listener);
}
emit(event, ...args) {
Log.trace({ event: event }, 'Emitting event');
return super.emit(event, ...args);
}
on(event, listener) {
Log.trace({ event: event }, 'Registering event listener');
return super.on(event, listener);
}
once(event, listener) {
Log.trace({ event: event }, 'Registering single use event listener');
return super.once(event, listener);
}
//
// Listen to multiple events for a single listener.
// Called with: listener(event, eventName)
//
// The returned object must be used with removeMultipleEventListener()
//
addMultipleEventListener(events, listener) {
Log.trace({ events }, 'Registering event listeners');
const listeners = [];
events.forEach(eventName => {
const listenWrapper = _.partial(listener, _, eventName);
this.on(eventName, listenWrapper);
listeners.push({ eventName, listenWrapper });
});
return listeners;
}
removeMultipleEventListener(listeners) {
Log.trace({ events }, 'Removing listeners');
listeners.forEach(listener => {
this.removeListener(listener.eventName, listener.listenWrapper);
});
}
removeListener(event, listener) {
Log.trace({ event: event }, 'Removing listener');
return super.removeListener(event, listener);
}
startup(cb) {
return cb(null);
}
})();