const EventEmitter = require('events');

class Server extends EventEmitter {

constructor(client){

super();

this.tasks = {};

this.taskId = 1;

process.nextTick(()=> {

this.emit(

'response',

'Type a command (help to list commands)'

);

});

client.on('command', (command,args) => {

switch(command){

case 'help':

case 'add':

case 'ls':

case 'delete':

this[command](args);

break;

default:

this.emit('response','Unknown Command...')

}

});

}

taskString() {

return Object.keys(this.tasks).map(key => {

return `${key}: ${this.tasks[key]}`;

}).join('\n');

}

help() {this.emit('response', `Available Commands:

add task

ls

delete :id`)}

add(args) {

this.tasks[this.taskId] = args.join(' ');

this.emit('response', `Added task ${this.taskId}`);

this.taskId++;

}

ls() {

this.emit('response', `Tasks:\n${this.taskString()}`)

}

delete(args) {

delete(this.tasks[args[0]]);

this.emit('response', `Deleted task ${args[0]} ...`)

}

}

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