mStream/mstream.js

const express = require('express');
const mstream = express();
const fs = require('fs');
const fe = require('path');
const bodyParser = require('body-parser');

exports.logit = function (msg) {
  console.log(msg);
}

exports.addresses = {
  localhost: false,
  network: false,
  internet: false
}

exports.bootStatus = false;

exports.serveit = function (program, callback) {
  var server;

  if (program.ssl && program.ssl.cert && program.ssl.key) {
    try {
      // TODO: Verify files are real
      server = require('https').createServer({
        key: fs.readFileSync(program.ssl.key),
        cert: fs.readFileSync(program.ssl.cert)
      });
    } catch (error) {
      console.log('FAILED TO CREATE HTTPS SERVER');
      error.code = 'BAD CERTS';
      throw error;
    }
  } else {
    server = require('http').createServer();
  }

  // Magic Middleware Things
  mstream.use(bodyParser.json()); // support json encoded bodies
  mstream.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies

  // Setup WebApp
  if (program.userinterface) {
    // Give access to public folder
    mstream.use('/public', express.static(fe.join(__dirname, program.userinterface)));
    // Serve the webapp
    mstream.get('/', function (req, res) {
      res.sendFile(fe.join(program.userinterface, 'mstream.html'), { root: __dirname });
    });
    // Serve Shared Page
    mstream.all('/shared/playlist/*', function (req, res) {
      res.sendFile(fe.join(program.userinterface, 'shared.html'), { root: __dirname });
    });
    // Serve Jukebox Page
    mstream.all('/remote', function (req, res) {
      res.sendFile(fe.join(program.userinterface, 'remote.html'), { root: __dirname });
    });
  }
  // Setup Album Art
  if (!program.albumArtDir) {
    program.albumArtDir = fe.join(__dirname, 'image-cache');
  }

  // This is a convenience function. It gets the vPath from any url string
  program.getVPathInfo = function (url) {
    // TODO: Verify user has access to this vpath

    // remove leading slashes
    if (url.charAt(0) === '/') {
      url = url.substr(1);
    }

    var fileArray = url.split('/');
    var vpath = fileArray.shift();

    // Make sure the path exists
    if (!program.folders[vpath]) {
      return false;
    }
    var baseDir = program.folders[vpath].root;
    var newPath = '';
    for (var dir of fileArray) {
      if (dir === '') {
        continue;
      }
      newPath += dir + '/';
    }

    // TODO: There's gotta be a better way to construct the relative path
    if (newPath.charAt(newPath.length - 1) === '/') {
      newPath = newPath.slice(0, - 1);
    }

    var fullpath = fe.join(baseDir, newPath)
    return {
      vpath: vpath,
      basePath: baseDir,
      relativePath: newPath,
      fullPath: fullpath
    };
  }

  // Setup Secret for JWT
  try {
    // If user entered a filepath
    if (fs.statSync(program.secret).isFile()) {
      program.secret = fs.readFileSync(program.secret, 'utf8');
    }
  } catch (error) {
    if (program.secret) {
      // just use secret as is
      program.secret = String(program.secret);
    } else {
      // If no secret was given, generate one
      require('crypto').randomBytes(48, function (err, buffer) {
        program.secret = buffer.toString('hex');
      });
    }
  }

  // JukeBox
  const jukebox = require('./modules/jukebox.js');
  jukebox.setup2(mstream, server, program);
  // Shared
  const sharedModule = require('./modules/shared.js');
  sharedModule.setupBeforeSecurity(mstream, program);

  // Login functionality
  program.auth = false;
  if (program.users) {
    require('./modules/login.js').setup(mstream, program, express);
    program.auth = true;
  } else {
    program.users = {
      "mstream-user": {
        vpaths: [],
        username: "mstream-user",
        admin: true
      }
    }

    if (program['lastfm-user'] && program['lastfm-password']) {
      program.users['mstream-user']['lastfm-user'] = program['lastfm-user']
      program.users['mstream-user']['lastfm-password'] = program['lastfm-password']
    }

    // Fill iin user vpaths
    for (var key in program.folders) {
      program.users['mstream-user'].vpaths.push(key);
    }

    // Fill in the necessary middleware
    mstream.use(function (req, res, next) {
      req.user = program.users['mstream-user'];
      next();
    });
  }

  // Used to determine the user has a working login token
  mstream.get('/ping', function (req, res) {
    res.json({
      vpaths: req.user.vpaths,
      guest: false
    });
  });

  // Setup all folders with express static
  for (var key in program.folders) {
    mstream.use('/media/' + key + '/', express.static(program.folders[key].root));
  }
  // Album art endpoint
  mstream.use('/album-art', express.static(program.albumArtDir));
  // Download Files API
  require('./modules/download.js').setup(mstream, program);
  // File Explorer API
  require('./modules/file-explorer.js').setup(mstream, program);
  // Load database
  require('./modules/db-management/database-master.js').setup(mstream, program);
  // Transcoder
  // require("./modules/ffmpeg.js").setup(mstream, program);
  // Scrobbler
  require('./modules/scrobbler.js').setup(mstream, program);
  // Finish setting up the jukebox and shared
  jukebox.setup(mstream, server, program);
  sharedModule.setupAfterSecurity(mstream, program);

  // Start the server!
  // TODO: Check if port is in use before firing up server
  server.on('request', mstream);
  server.listen(program.port, function () {
    console.log('Donate to our Patreon: https://www.patreon.com/mstream')
    exports.bootStatus = true;

    let protocol = program.ssl && program.ssl.cert && program.ssl.key ? 'https' : 'http';
    exports.addresses.local = protocol + '://localhost:' + program.port;
    exports.logit('Access mStream locally: ' + exports.addresses.local);

    require('internal-ip').v4().then(ip => {
      exports.addresses.network = protocol + '://' + ip + ':' + program.port;
      exports.logit('Access mStream on your local network: ' + exports.addresses.network);
    });

    // Handle Port Forwarding
    if (program.tunnel) {
      try {
        require('./modules/auto-port-forwarding.js').setup(program, function (status) {
          if (status === true) {
            require('public-ip').v4().then(ip => {
              exports.addresses.internet = protocol + '://' + ip + ':' + program.port;
              exports.logit('Access mStream on your local network:the internet: ' + exports.addresses.internet);
            });
          } else {
            console.log('Port Forwarding Failed');
            exports.logit('Port Forwarding Failed.  The server is runnig but you will have to configure your own port forwarding');
          }
        });
      } catch (err) {
        console.log('Port Forwarding Failed');
        exports.logit('Port Forwarding Failed.  The server is runnig but you will have to configure your own port forwarding');
      }
    }
  });

}