messageFactory.js

// -------------------- Constants --------------------
const CMD_TGL = 'toggle';
const CMD_ON = 'H';
const CMD_OFF = 'L';

const MSG_CMD = 'command';
const MSG_CHAT = 'message';

const PRT_LED = 'led';

// These are the different types of messages so far
function CommandMessage( option ) {
    this.messageType = option.messageType || MSG_CMD;
    this.command = option.command || CMD_TGL;
    this.part = option.part || PRT_LED;
}

function ChatMessage( option ) {
    this.messageType = option.messageType || MSG_CHAT;
    this.text = option.text || 'Hello World';
}

// This factory builds cool shit

function MessageFactory() {
    MessageFactory.prototype.createMsg  = function createMessage( options ) {
        var parentClass = null;

        switch(options.messageType){
            case MSG_CMD:
                parentClass = CommandMessage;
                break;
            case MSG_CHAT:
                parentClass = ChatMessage;
                break;
            default:
                break;
        }

        if(parentClass === null) return false;

        return new parentClass(options);

    }
}

var msgFactory = new MessageFactory();

// On-Click events that will use the factory

function ledON() {
    var ledMessage = msgFactory.createMsg({
        messageType : MSG_CMD,
        command : CMD_ON,
        part : PRT_LED
    } );
    console.log(ledMessage)
    exampleSocket.send(JSON.stringify(ledMessage))
}

function ledOFF() {
    var ledMessage = msgFactory.createMsg({
        messageType : MSG_CMD,
        command : CMD_OFF,
        part : PRT_LED
    } );
    console.log(ledMessage);
    exampleSocket.send(JSON.stringify(ledMessage))
}

function sendChat(text) {
    var chat = msgFactory.createMsg({
        messageType : MSG_CHAT,
        text : text
    } );
    console.log(chat);
    exampleSocket.send(JSON.stringify(chat))
}