app.ts

import express, { Express } from 'express';
import dotenv from 'dotenv';
import mongoose from 'mongoose';
import path from 'path';
import cookieParser from 'cookie-parser';
import logger from 'morgan';
import createError from 'http-errors';
import cors from 'cors';
import passport from 'passport';

import {
  errorLogger,
  errorResponder,
  invalidPathHandler,
} from './lib/errorHandlers';
import apiRouter from './routes/api';
import authRouter from './routes/auth';
import corsOptions from './config/corsOptions';
import credentials from './lib/credentials';

dotenv.config();

// Import the entire Passport Local Strategy module
import './config/passportLocal';

// Import Passport JWT Strategy module
import passportJWT from './config/passportJWT';
passportJWT(passport);

/**
 * ------------- GENERAL SETUP ----------------
 */

// Initialize express app
const app: Express = express();

// Set up Mongoose/MongoDb connection
const connectDB = async () => {
  try {
    await mongoose.connect(process.env.DB_CONNECTION_URL);
    console.log('Connected to database');
  } catch (error) {
    if (error instanceof Error) {
      console.error(error.message);
    }
  }
};

connectDB();

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// Handle checking of credentials before CORS requests
// Also handle credentials requirement for cookies
app.use(credentials);

// Set up cors requests
app.use(cors(corsOptions));

// Initialize passport instance
app.use(passport.initialize());

/**
 * ------------- ROUTES ----------------
 */

// Redirect to api route
app.get('/', (req, res) => {
  res.redirect('/api');
});

app.use('/auth', authRouter);
app.use('/api', apiRouter);

// Catch 404 and forward to error handler
app.use((req, res, next) => {
  next(createError(404));
});

// Log the error
app.use(errorLogger);

// Respond to the error
app.use(errorResponder);

// Send response for invalid paths
app.use(invalidPathHandler);

export default app;