index.js

'use strict';

const assert = require('assert');
const express = require('express');
const fs = require('fs');
const mongoose = require('mongoose');
const path = require('path');

assert.ok(process.env.MONGODB_CONNECTION_STRING);

require('./build')(process.env.WATCH);

const app = express();
app.use(express.json());

const netlifyFunctions = fs.readdirSync('./netlify/functions').reduce((obj, path) => {
  obj[path.replace(/\.js$/, '')] = require(`./netlify/functions/${path}`);
  return obj;
}, {});

app.use('/.netlify/functions', express.json(), function netlifyFunctionsMiddleware(req, res) {
  const actionName = req.path.replace(/^\//, '');
  if (!netlifyFunctions.hasOwnProperty(actionName)) {
    throw new Error(`Action ${actionName} not found`);
  }
  const action = netlifyFunctions[actionName];

  const params = {
    headers: req.headers,
    body: JSON.stringify(req.body),
    queryStringParameters: req.query
  };
  action.handler(params).
    then(result => {
      if (result.statusCode >= 400) {
        let message = result.body;
        try {
          message = JSON.parse(message);
        } catch (err) {}
        return res.status(400).json(typeof message === 'string' ? { message } : message);
      }
      let isHtml = false;
      if (result.headers) {
        res.set(result.headers);
      }
      try {
        result.body = JSON.parse(result.body);
        isHtml = false;
      } catch (err) {
        isHtml = true;
      }
      if (isHtml) {
        if (result.isBase64Encoded) {
          result.body = Buffer.from(result.body, 'base64');
        }
        res.end(result.body);
      } else {
        res.json(result.body);
      }
    }).
    catch(err => {
      res.status(500).json({ message: err.message, stack: err.stack });
    });
});

mongoose.connect(process.env.MONGODB_CONNECTION_STRING);

app.use('/studio', require('@mongoosejs/studio/express')('/studio/api'));

app.use(express.static('./public'));
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, './public/index.html'));
});

const port = process.env.PORT || 4488;

app.listen(port);
console.log('Listening on port', port);