server.js

const express = require('express');
const yelp = require('yelp-fusion');

const app = express();

const clientId = process.env.CLIENT_ID;
const clientSecret = process.env.CLIENT_SECRET;

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

// Express only serves static assets in production
if (process.env.NODE_ENV === 'production') {
  app.use(express.static('client/build'));
}

app.get('/api/food/:city', (req, res) => {
  const city = req.params.city;
  yelp.accessToken(clientId, clientSecret).then(token => {
    const client = yelp.client(token.jsonBody.access_token);

    client.search({
      location: city,
      limit: 50
    }).then(results => {
      res.json(results.jsonBody.businesses);
    });
  }).catch(e => {
    console.log(e);
  });
});

app.get('/api/food/:city/:type', (req, res) => {
  const city = req.params.city, type = req.params.type;
  yelp.accessToken(clientId, clientSecret).then(token => {
    const client = yelp.client(token.jsonBody.access_token);

    client.search({
      term: type,
      location: city,
      limit: 50
    }).then(results => {
      res.json(results.jsonBody.businesses);
    });
  }).catch(e => {
    console.log(e);
  });
});

app.listen(app.get('port'), () => {
  console.log(`Find the server at: http://localhost:${app.get('port')}/`); // eslint-disable-line no-console
});