glot/src/examples/once.js

EventEmitter with Promises and Generators

'use strict'
const Glot = require('../lib/glot');
const co = require('co');
const wait = require('co-wait');

let events = new Glot();

//Once plain function listener
events.once('foo', function (data){
	console.log('once foo plain:', data)
});

//Once promise listener
events.once('foo', (data) => {
	return new Promise((resolve, reject) => {
		console.log('once foo promise:', data);
	
		setTimeout(()=> resolve(data), 2000);
		
	}).catch((err) => console.log(err));
});

//Once generator listener
events.once('foo', function* (data){
	console.log('once foo generator:', data)
	yield wait(2000);
	return data;
});

events.pmit('foo', { promise: 'foo1' }).then((data) => console.log(data)).catch((err) => console.log(err.stack));
events.pmit('foo', { promise: 'foo2' }).then((data) => console.log(data)).catch((err) => console.log(err.stack));

events.emit('foo', { emit: 'foo1' });
events.emit('foo', { emit: 'foo2' });

co(function *() {
	try {
		let result = yield events.gmit('foo',  { gmit: 'foo1' });
		let result2 = yield events.gmit('foo',  { gmit: 'foo2' });
		
		console.log([...result, ...result2]);
	} catch(err) {
		console.log(err.stack);
	}
	
});