app.js

const fs = require('fs');
const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const bodyParser = require('body-parser');
const md = require('markdown-it')();

const indexRouter = require('./routes/index');
const searchRouter = require('./routes/search');
const autoDetectRouter = require('./routes/autodetect');
const guessItRouter = require('./routes/guessit');

const app = express();

// view engine setup
app.engine('md', function (filePath, options, callback) { // define the template engine
  fs.readFile(filePath, function (err, content) {
    if (err) return callback(new Error(err));
    return callback(null, md.render(content.toString()));
  });
});
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.set('view engine', 'md');
app.set('json spaces', 2)

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')));
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies

app.use('/', indexRouter);
app.use('/search', searchRouter);
app.use('/autodetect', autoDetectRouter);
app.use('/guessit', guessItRouter);

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

// error handler
app.use((err, req, res, next) => {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error.ejs');
});

module.exports = app;