app.js

require('dotenv').config();

const discord = require('./lib/discord');
const mongo   = require('./lib/mongo');

const express = require('express');
const cors    = require('cors');

const app = express();

const allowedDomains = process.env.ALLOWED_DOMAINS ? process.env.ALLOWED_DOMAINS.split(',') : [];
app.use(cors({
  origin: (origin, callback) => {
    // Allow requests with no origin (e.g., mobile apps, curl requests)
    if (!origin) return callback(null, true);

    // Check if the origin is in the allowed domains array
    if (allowedDomains.indexOf(origin) !== -1) {
      return callback(null, true);
    } else {
      return callback(new Error('Not allowed by CORS'));
    }
  }
}));

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

app.use('/', express.static('public')); // TODO: Host UI from here perhaps?

const port = process.env.PORT || 3000;
const interface = process.env.INTERFACE || 'localhost';
const apiPrefix = process.env.API_PREFIX || '';

app.use((req, res, next) => { // TODO: Proper logging
  console.log(`${req.method} ${req.url}`);
  next();
});

app.get(`${apiPrefix}`, (req, res) => {
  res.json({
    message: "Welcome to the MapsNotIncluded API"
  });
});

app.use(`${apiPrefix}/login`, require('./controllers/Login'));
app.use(`${apiPrefix}/coordinates`, require('./controllers/Coordinates'));

app.use((err, req, res, next) => {
  console.log(`biq Error: ${err}`);
  console.error(err.stack);
  console.log(err.message);

  discord.send(`[${req.method}] ${req.url} Error: ${err}\r\n\r\n \`\`\`${err.stack}\`\`\``);

  res.status(500).json(
    {
      error: 'Something broke!'
    }
  );
});

mongo.connect().then(() => {
  app.listen(port, interface, () => {
      console.log(`Server is running on port http://${interface}:${port} with prefix ${apiPrefix}`);
  });
}).catch((err) => {
  console.error('MongoDB connection error:');
  console.error(err);
  discord.send(`MongoDB connection error: ${err}`);
});