text: var Todo = require('./models/todo');
  
  function getTodos(res) {
      Todo.find(function (err, todos) {
  
          // if there is an error retrieving, send the error. nothing after res.send(err) will execute
          if (err) {
              res.send(err);
          }
  
          res.json(todos); // return all todos in JSON format
      });
  };
  
  module.exports = function (app) {
  
      // api ---------------------------------------------------------------------
      // get all todos
      app.get('/api/todos', function (req, res) {
          // use mongoose to get all todos in the database
          getTodos(res);
      });
  
      // create todo and send back all todos after creation
      app.post('/api/todos', function (req, res) {
  
          // create a todo, information comes from AJAX request from Angular
          Todo.create({
              companyname: req.body.companyName,
              personname: req.body.cntcName,
              contactnumber: req.body.phnNo,
              email: req.body.email,
              url: req.body.websiteUrl
          }, function (err, todo) {
              if (err)
                  res.send(err);
  
              // get and return all the todos after you create another
              res.send(todo);
          });
  
      });
  
      // delete a todo
      app.delete('/api/todos/:todo_id', function (req, res) {
          Todo.remove({
              _id: req.params.todo_id
          }, function (err, todo) {
              if (err)
                  res.send(err);
  
              getTodos(res);
          });
      });
  
      // application -------------------------------------------------------------
      app.get('*', function (req, res) {
          res.sendFile(__dirname + '/public/index.html'); // load the single view file (angular will handle the page changes on the front-end)
      });
  };
  