@parlour/parlour-client/src/lib/event-model.js

The parlour websocket client

class EventModel {
	constructor(data) {
		Object.assign(this, data);
		this._events = {};
	}
	_on(name, fn) {
		const eventModel = this;
		if(!(name in eventModel._events)) {
			eventModel._events[name] = [];
		}
		eventModel._events[name].push(fn);
		return () => {
			eventModel.off(name, fn);
		};
	}
	on() {
		const args = arguments;
		const typeOfArgs = typeof args[0];
		switch(typeOfArgs) {
			case 'object':
			const eventHandlers = args[0];
			const unbindFns = [];
			for(let key in eventHandlers) {
				unbindFns.push(this._on(key, eventHandlers[key]));
			}
			return () => {
				for(let i = 0; i < unbindFns.length; i++) {
					unbindFns[i]();
				}
			};
			break;
			case 'string':
			return this._on(args[0], args[1]);
			break;
			default:
			break;
		}
	}
	off(name, fn) {
		const fns = this._events[name];
		if(Array.isArray(fns)) {
			const index = fns.indexOf(fn);
			if(index >= 0) {
				fns.splice(index, 1);
			}
		}
	}
	trigger(name, args) {
		const fns = this._events[name];
		if(Array.isArray(fns)) {
			for(let i = 0; i < fns.length; i++) {
				let fn = fns[i];
				fn.apply(this, args);
			}
		}
	}
}

export default EventModel;