server.js

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

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);
		console.log(todos);

});

app.get('/todos/:id', function(req,res){
	var todoID = parseInt(req.params.id, 10);
	var matchedTodo = _.findWhere(todos, {id: todoID});

	console.log(matchedTodo);
	if(matchedTodo){
		res.json(matchedTodo)
	} else {
		res.status(404).send();
	}

});

//app.post    POST /todos
app.post('/todos', function(req,res){
	var body = req.body
	body.description = body.description.trim();
	var newBody = _.pick(body, 'description', 'completed');

	if(!_.isBoolean(newBody.completed) || !_.isString(newBody.description) || newBody.description.trim().length === 0){
		return res.status(400).send();
	} else {
	newBody.id = todoNextId++;
	todos.push(newBody);
	res.json(newBody);
	}
});


app.delete('/todos/:id', function (req, res){
	
	var todoID = parseInt(req.params.id, 10);
	var matchedTodo = _.findWhere(todos, {id: todoID});

	if (!matchedTodo){
		res.status(404).json({"error": "no todo found with that ID"});
	} else {
		todos = _.without(todos, matchedTodo);
		res.json(matchedTodo);
	}
});




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