.todo in nodejs

todo in nodejs.js

#### to run
node client.js

> only implemented help, add and ls commands

client.js

const EventEmitter = require("events");
const readline = require("readline");

let client = new EventEmitter();
const server = require('./server.js').server(client);

const rl = readline.createInterface({
	input: process.stdin,
	output: process.stdout
});

rl.on('line', (line) => {
	console.log("Client input > " + line)
	commands = line.split(" ");	
	client.emit('command', commands[0], commands.slice(1))
});

server.on('reply', (reply) => {
	console.log("Server reply > " + reply)
});

server.js

const EmitEmitter = require('events');

class Server extends EmitEmitter {
	constructor(client) {
		super();
		this.tasks = {};
		this.taskId = 1;

		client.on("command", (command, args) => {
			switch(command) {
				case "help": 
				case "add":
				case "ls":
				case "del":
					// this.emit('reply', "hi!")
					this[command](args);
					break;
				default: 
					this.emit('reply', "Not a valid command. Type help for help");
			}			
		});
	};

	getTasks() {
		return Object.keys(this.tasks).map(key => 
			key + " :> " + this.tasks[key] 
			// return `${key} : ${this.tasks[key]}`
		).join('\n');
		 
	}

	help() {
		this.emit('reply', `Available commands are:
			* help
			* add <taskname>
			* ls
			* del <taskname>
			`)
	};

	add(args) {
		//add task
		this.tasks[this.taskId] = args.join(' ');
		this.taskId++;

		this.emit('reply', `Task ${args.join(' ')} added`);
	};

	ls() {
			this.emit('reply', `The list of tasks are: 
${this.getTasks()}
			`);	
	}
};

exports.server = (client) => new Server(client);