server.js

const cors = require('cors');
const request = require('request')
const fetch = require("node-fetch");
const express = require('express');
const app = express();
const shortid = require('shortid');

fetch(request, {mode: 'cors'});

app.use(express.json());
app.set('port', process.env.PORT || 3001);
app.use(cors());

app.use(express.static("build"))

app.locals.title = 'ArtisTry Backend';

app.get('/', (request, response) => {
  response.send('ArtisTry Backend');
});

app.locals.favorites = []


app.get('/api/v1/favorites', (request, response) => {
  const favorites = app.locals.favorites;
    if(!favorites) {
      return response.sendStatus(404)
    }

  response.json({ favorites });
});


app.post('/api/v1/favorites', (request, response) => {
  const id = shortid.generate();
  const favorite = request.body;

  for (let requiredParameter of [
    'title',
    'contentId',
    'artistContentId',
    'artistName',
    'completitionYear',
    'yearAsString',
    'width',
    'image',
    'height',
    'name'
    ]) {
    if (!favorite[requiredParameter]) {
      return response
        .status(422)
        .send({ error: `Expected format: { artist: <String>, title: <String> }. You're missing a "${requiredParameter}" property.` });
    }
  }
  const { title, contentId, artistContentId, artistName, completitionYear, yearAsString, width, image, height, name } = favorite;
  app.locals.favorites.push({ title, contentId, artistContentId, artistContentId, artistName, completitionYear, yearAsString, width, image, height, name });
  response.status(201).json({ artistName, title});
});


  app.delete('/api/v1/favorites/:contentId', (request, response) => {
    const { contentId } = request.params;
    const parsedId = parseInt(contentId);
    const match = app.locals.favorites.find(painting => parseInt(painting.contentId) === parsedId);

    if (!match) {
      return response.status(404).json({ error: `No painting found with an id of ${contentId}.` })
    }

    const updatedPaintings = app.locals.favorites.filter(painting => parseInt(painting.contentId) !== parsedId);

    app.locals.favorites = updatedPaintings;

    return response.status(202).json(app.locals.favorites)
  });


app.listen(app.get('port'), () => {
  console.log(`${app.locals.title} is running on http://localhost:${app.get('port')}.`);
});