udemy-node-todo-app/server/server.js

const express = require('express')
const _ = require('lodash')
const bodyParser = require('body-parser')
const {ObjectID} = require('mongodb');


var {mongoose} = require('./db/mongoose')
var {User} = require('./models/user')
var {Todo} = require('./models/todo')

var app = express();
const port = process.env.PORT || 8888;

app.use(bodyParser.json());

app.post('/todos', (req, res) => {
  var todo = new Todo({
    text: req.body.text
  });

  todo.save().then((doc) => {
    return res.send(doc);
  }, (e) => {
    return res.status(400).send(e);
  });
});

app.get('/todos', (req, res) => {
  Todo.find().then((todos) => {
    return res.send({todos});
  }, (e) => {
    return res.status(400).send(e);
  });
});

app.get('/todos/:id', (req, res) => {
  var id = req.params.id;
  if (!ObjectID.isValid(id)){
    return res.status(404).send();
  }
  Todo.findById(req.params.id).then((todo) => {
    if(!todo){ return res.status(404).send(); }
    return res.send({todo});
  }).catch((e) => res.status(400).send())
});

app.delete('/todos/:id', (req, res) => {
  var id = req.params.id;
  if (!ObjectID.isValid(id)){ return res.status(404).send(); }
  Todo.findByIdAndRemove(id).then((todo) => {
    if(!todo){ return res.status(404).send(); }
    return res.send({todo});
  }).catch((e) => res.status(400).send())
});

app.patch('/todos/:id', (req, res) => {
  var id = req.params.id;
  var body = _.pick(req.body, ['text', 'completed']);
  if (!ObjectID.isValid(id)){ return res.status(404).send(); }
  if(_.isBoolean(body.completed) && body.completed){
    body.completedAt = new Date().getTime();
  } else {
    body.completedAt = null;
    body.completed = false;
  }

  Todo.findByIdAndUpdate(id, { $set: body, }, { new: true }).then((todo) => {
    if(!todo){ return res.status(404).send(); }
    return res.send({todo});
  }).catch((e) => {
    res.status(400).send();
  });
});

app.listen(port, () => {
  console.log(`Started on port ${port}`);
});

module.exports = {app}