server.js

// SERVER-SIDE JAVASCRIPT

//require express in our app
var express = require('express');
var morgan = require('morgan');

// generate a new express app and call it 'app'
var app = express();

var mongoose = require('mongoose');
var bodyParser = require('body-parser');

// serve static files from public folder
app.use(express.static(__dirname + '/public'));
app.use(bodyParser.urlencoded({
  extended: true
}));
app.use(morgan('combined'));

/************
 * DATABASE *
 ************/

var db = require('./models');

/**********
 * ROUTES *
 **********/

/*
 * HTML Endpoints
 */
app.get('/', function homepage(req, res) {
  res.sendFile(__dirname + '/views/index.html');
});

app.get('/cities/:id', function homepage(req, res) {
  console.log(req.params.id)
  res.sendFile(__dirname + '/views/cities.html');
});

/*
 * JSON API Endpoints
 */

app.get('/api/cities', function api_index(req, res) {
  // send all cities as JSON response
  db.City.find({}, function(err, city) {
    if (err) {
      return console.log("index error " + err);
    }
    res.json(city);
  });
});

app.post('/api/cities', function citiesCreate(req, res) {
  var newCity = new db.City({
    location: {
      lat: req.body.lat,
      lng: req.body.lng
    },
    name: req.body.name,
    logo: req.body.logo,
    blurbs: req.body.blurbs
  });
});

app.get('/api/cities/:id', function citiesShow(req, res) {
  db.City.findOne({
    _id: req.params.id
  }, 
    function(err, city) {
      res.json(city);
    }
  );
});

app.delete('/api/cities/:id', function cityDestroy(req, res) {
  cityId = req.params.id;
  db.City.remove({
    _id: cityId
  }, 
    function(err, removedCity) {
      if (err) {
        res.send("error")
      };
      res.json({
        _id: cityId
      });
    }
  );
});

app.get('/api/cities/:id/blurbs', function blurbsShow(req, res) {
  db.City.findOne({
    _id: req.params.id
  }, 
    function(err, city) {
      res.json(city.blurbs);
    }
  );
});

app.post('/api/cities/:id/blurbs', function blurbsCreate(req, res) {
  var cityId = req.params.id;
  var newBlurb = new db.Blurb({
    poster: req.body.poster,
    textContent: req.body.textContent,
    likes: 0,
    imgPath: req.body.imgPath || ""
  });
  db.City.findOne({
    _id: cityId
  },
    function(err, city) {
      city.blurbs.unshift(newBlurb);
      city.save();
    }
  );
  res.json(newBlurb);
});

app.delete('/api/cities/:id/blurbs/:blurbId', function deleteBlurb(req, res) {
  var blurbId = req.params.blurbId;
  var cityId = req.params.id;

  db.City.findOne({
    _id: cityId
  }, 
    function(err, city) {
      city.blurbs = city.blurbs.filter(function(blurb) {
        return blurb._id != blurbId;
      });
      city.save();
    }
  );
  res.send(blurbId);
});

app.put('/api/cities/:id/blurbs/:blurbId', function updateBlurb(req, res) {
  var blurbId = req.params.blurbId;
  var cityId = req.params.id;

  db.City.findOne({
    _id: cityId
  },
    function(err, city) {
      var myBlurb = {};
      city.blurbs.forEach(function(blurb) {
        if (blurb._id == blurbId) {
          blurb.likes += 1;
          myBlurb = blurb;
        }
      });
      city.save();
      res.json({
        _id: blurbId,
        likes: myBlurb.likes
      });
    }
  );
});

/**********
 * SERVER *
 **********/

// listen on port 3000
app.listen(process.env.PORT || 3000, function() {
    console.log('Express server is running on http://localhost:3000/');
});