Ember.js Server Mock with id sequence and req.body JSON

server__mocks__todos.js

// Generated originally with `ember g http-mock todos`,
// then customized so JSON body parsing is available.

module.exports = function(app) {
  var express = require('express');
  var todosRouter = express.Router();

  // Install body-parser: `npm install --save-dev body-parser`
  // Body parser needed so req.body is
  // available to router endpoints as JS object.
  var bodyParser = require('body-parser');

  // Use the JSON parser middleware
  todosRouter.use(bodyParser.json());

  // Incrementing ids
  var idSequence = {
    next: (function() {
      var nextId = 1;
      return function() {
        var id = nextId;
        nextId = nextId + 1;
        return id;
      };
    })()
  };

  todosRouter.get('/', function(req, res) {
    res.send({
      'todos': [
         {
           id: idSequence.next(),
           title: 'Learn Ember.js',
           isCompleted: true
         },
         {
           id: idSequence.next(),
           title: '...',
           isCompleted: false
         },
         {
           id: idSequence.next(),
           title: 'Profit!',
           isCompleted: false
         }
      ]
    });
  });

  todosRouter.post('/', function(req, res) {
    var todo = req.body.todo;
    res.status(201).send({
      'todos': {
        id: idSequence.next(),
        title: todo.title,
        isCompleted: todo.isCompleted
      }
    });
  });

  todosRouter.get('/:id', function(req, res) {
    res.send({
      'todos': {
        id: req.params.id
      }
    });
  });

  todosRouter.put('/:id', function(req, res) {
    res.send({
      'todos': {
        id: req.params.id
      }
    });
  });

  todosRouter.delete('/:id', function(req, res) {
    res.status(204).end();
  });

  app.use('/api/todos', todosRouter);
};