ExpiryApp

This is a study/learn tutorial that runs on MEAN(Mongo ExpressJS Angular NodeJS) stack.

Install dependencies

npm install This will install the project dependencies

Build

Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the --prod flag for a production build.

Prepare

Make sure NodeJS is installed, MongoDB installed and running(use mongodb to run) and has the required data.

Running the project

Run node server and open http://localhost:3001 in a browser. Here we go.

Server code(server.js)

api file for interacting with MongoDB

const api = require('./server/routes/api');

parsers

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

angular/front end code output

app.use(express.static(path.join(__dirname, 'dist/expiryApp')));

api location

app.use('/api', api);

send requests to angular app

api.get('*', (req, res) => {
    res.sendFile(path.join(__dirname, 'dist/expiryApp/index.html'));
});

set port

const port = process.env.PORT || '3001';
app.set('port', port);

const server = http.createServer(app);

server.listen(port, () => console.log(`Running on localhost: ${port}`));

API code(server/routes/api.js)

establishing connection

const connection = (closure) => {
  return MongoClient.connect('mongodb://localhost:27017/products', (err, db) => {
    if (err) return console.log(err);

    closure(db);
  });
};

error case handler

const sendError = (err, res) => {
  response.status = 501;
  response.message = typeof err === 'object' ? err.message : err;
  res.status(501).json(response);
};

success case handler

const response = {
  status: 200,
  data: [],
  message: null
};

'/vegitables' api

router.get('/vegitables', (req, res) => {
  connection((db) => {
    db.collection('vegitables')
    .find()
    .toArray()
    .then((users) => {
      response.data = users;
      res.json(response);
    })
    .catch((err) => sendError(err, res));
  });
});

'/fruits' api

router.get('/fruits', (req, res) => {
  connection((db) => {
    db.collection('fruits')
    .find()
    .toArray()
    .then((users) => {
      response.data = users;
      res.json(response);
    })
    .catch((err) => sendError(err, res));
  });
});

'/groceries' api

router.get('/groceries', (req, res) => {
  connection((db) => {
    db.collection('groceries')
    .find()
    .toArray()
    .then((users) => {
      response.data = users;
      res.json(response);
    })
    .catch((err) => sendError(err, res));
  });
});