server.js

var express = require('express');
var bodyParser = require('body-parser');

var app = express();
var PORT = process.env.PORT || 3000;
var todos = [];
var todoNextId = 1;

app.use(bodyParser.json());

app.get('/',function(req,res){
	res.send('Todo API Root')
});

app.get('/todos',function(req,res){
	res.json(todos);
})

app.get('/todos/:id',function(req,res){

	var todoID = parseInt(req.params.id);
	var matched;
	
	todos.forEach(function(todo) {
		
		if (todo.id === todoID) {
			matched = todo;		
		};		
	});

	if (matched) {
		res.json(matched);
	} else {
		res.status(404).send();
	};

});

app.post('/todos', function(req,res){

	var body = req.body;

	body.id = todoNextId++;
	todos.push(body);
	res.json(body);

});

app.listen(PORT,function(){
	console.log('Express is listening on port ' + PORT + '!')
});