sample code for a simple chat bot

chatbot.js

function receiveMessage(id, text)
{
	let state = redis.get(id);
	
	if (state === "expecting default selection") processDefaultSelection(id, text)
	else if (state == "expecting location") processLocationResponse(id, text)
	else if (state === "expecting quantity") processQuantityResponse(id, text)
	else sendDefaultMessage(id); // first message from user or user is in no state
}

function sendDefaultMessage(id)
{
	twitter.sendTextMessage(id, "Welcome to our chatbot. Make a selection.\n1. Make Order\n2. Cancel Order")
	redis.set(id, "expecting default selection")
}

function processDefaultSelection(id, text)
{
	if (text === 1) startOrder(id, text)
	else if (text === 2) cancelOrder(id, text)
}