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var fs = require('fs');
var app = require('express')();

var https = require('https').Server(
  {
    key: fs.readFileSync(__dirname + '/../ssl/server.key'),
    cert: fs.readFileSync(__dirname + '/../ssl/server.cert'),

    // TLS Versions
    maxVersion: 'TLSv1.3',
    minVersion: 'TLSv1.2',

    // Hardened configuration
    ciphers:
      'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384',

    honorCipherOrder: false,
  },
  app,
);
app.disable('x-powered-by');

var io = require('socket.io')(https, {
  cors: {
    origin: '*',
  },
});
var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var utils = require('./lib/utils');

// Get configuration
var env = process.env.NODE_ENV || 'dev';
var config = require('./config/config.json')[env];
global.__basedir = __dirname;

// Database connection
var mongoose = require('mongoose');
// Use native promises
mongoose.Promise = global.Promise;
// Trim all Strings
mongoose.Schema.Types.String.set('trim', true);

mongoose.connect(
  `mongodb://${config.database.server}:${config.database.port}/${config.database.name}`,
  {},
);

// Models import
require('./models/user');
require('./models/audit');
require('./models/client');
require('./models/company');
require('./models/template');
require('./models/vulnerability');
require('./models/vulnerability-update');
require('./models/language');
require('./models/audit-type');
require('./models/vulnerability-type');
require('./models/vulnerability-category');
require('./models/custom-section');
require('./models/custom-field');
require('./models/image');
require('./models/settings');

// Socket IO configuration
io.on('connection', socket => {
  socket.on('join', data => {
    console.log(
      `user ${data.username.replace(/\n|\r/g, '')} joined room ${data.room.replace(/\n|\r/g, '')}`,
    );
    socket.username = data.username;
    do {
      socket.color =
        '#' + (0x1000000 + Math.random() * 0xffffff).toString(16).substr(1, 6);
    } while (socket.color === '#77c84e');
    socket.join(data.room);
    io.to(data.room).emit('updateUsers');
  });
  socket.on('leave', data => {
    console.log(
      `user ${data.username.replace(/\n|\r/g, '')} left room ${data.room.replace(/\n|\r/g, '')}`,
    );
    socket.leave(data.room);
    io.to(data.room).emit('updateUsers');
  });
  socket.on('updateUsers', data => {
    var userList = [
      ...new Set(
        utils.getSockets(io, data.room).map(s => {
          var user = {};
          user.username = s.username;
          user.color = s.color;
          user.menu = s.menu;
          if (s.finding) user.finding = s.finding;
          if (s.section) user.section = s.section;
          return user;
        }),
      ),
    ];
    io.to(data.room).emit('roomUsers', userList);
  });
  socket.on('menu', data => {
    socket.menu = data.menu;
    data.finding ? (socket.finding = data.finding) : delete socket.finding;
    data.section ? (socket.section = data.section) : delete socket.section;
    io.to(data.room).emit('updateUsers');
  });
  socket.on('disconnect', () => {
    socket.broadcast.emit('updateUsers');
  });
});

// CORS
app.use(function (req, res, next) {
  res.header('Access-Control-Allow-Origin', req.headers.origin);
  res.header('Access-Control-Allow-Methods', 'GET,POST,DELETE,PUT,OPTIONS');
  res.header(
    'Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept',
  );
  res.header('Access-Control-Expose-Headers', 'Content-Disposition');
  res.header('Access-Control-Allow-Credentials', 'true');
  next();
});

// CSP
app.use(function (req, res, next) {
  res.header(
    'Content-Security-Policy',
    "default-src 'none'; form-action 'none'; base-uri 'self'; frame-ancestors 'none'; sandbox; require-trusted-types-for 'script';",
  );
  next();
});

app.use(bodyParser.json({ limit: '100mb' }));
app.use(
  bodyParser.urlencoded({
    limit: '10mb',
    extended: false, // do not need to take care about images, videos -> false: only strings
  }),
);

app.use(cookieParser());

// Routes import
require('./routes/user')(app);
require('./routes/audit')(app, io);
require('./routes/client')(app);
require('./routes/company')(app);
require('./routes/vulnerability')(app);
require('./routes/template')(app);
require('./routes/vulnerability')(app);
require('./routes/data')(app);
require('./routes/image')(app);
require('./routes/settings')(app);
require('./routes/cwe')(app);
require('./routes/cvss')(app);
require('./routes/check-cwe-update')(app);
require('./routes/update-cwe-model')(app);

app.get('*', function (req, res) {
  res.status(404).json({ status: 'error', data: 'Route undefined' });
});

// Start server

https.listen(config.port, config.host);

module.exports = app;