Clean up a bit, add crude playlist implementation, start sockets

app.js

@@ -1,29 +1,34 @@
+// express and http
 var express = require('express');
-var path = require('path');
-var favicon = require('serve-favicon');
-var logger = require('morgan');
-var cookieParser = require('cookie-parser');
-var bodyParser = require('body-parser');
-
-var routes = require('./routes/index');
-var users = require('./routes/users');
-
 var app = express();
+var http = require('http').Server(app);
 
 // view engine setup
+var path = require('path');
 app.set('views', path.join(__dirname, 'views'));
 app.set('view engine', 'hbs');
 
+// logging
+var logger = require('morgan');
+app.use(logger('dev'));
+
+// Sockets
+var io = require('socket.io').listen(http);
+io.on('connection', function(socket){
+  console.log('a user connected');
+});
+
+var routes = require('./routes/index');
+
+// Unused (for now) cookies and favicons
+//var favicon = require('serve-favicon');
+//var cookieParser = require('cookie-parser');
 // uncomment after placing your favicon in /public
 //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
-app.use(logger('dev'));
-app.use(bodyParser.json());
-app.use(bodyParser.urlencoded({ extended: false }));
-app.use(cookieParser());
+//app.use(cookieParser());
 app.use(express.static(path.join(__dirname, 'public')));
 
 app.use('/', routes);
-app.use('/users', users);
 
 // catch 404 and forward to error handler
 app.use(function(req, res, next) {

package-lock.json

@@ -0,0 +1,1123 @@
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+  "version": "0.0.0",
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+    "xmlhttprequest-ssl": {
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+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.3.tgz",
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+    },
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+      "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+      "optional": true,
+      "requires": {
+        "camelcase": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
+        "cliui": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
+        "decamelize": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+        "window-size": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz"
+      }
+    },
+    "yeast": {
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+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+    }
+  }
+}

package.json

@@ -8,12 +8,13 @@
   "dependencies": {
     "body-parser": "~1.15.1",
     "cookie-parser": "~1.4.3",
-    "debug": "~2.2.0",
+    "debug": "^2.6.8",
     "express": "~4.13.4",
-    "express-validator": "^3.1.2",
+    "express-validator": "^3.2.1",
     "hbs": "~4.0.0",
     "morgan": "~1.7.0",
     "player": "^0.6.1",
-    "serve-favicon": "~2.3.0"
+    "serve-favicon": "~2.3.0",
+    "socket.io": "^2.0.3"
   }
 }

routes/index.js

@@ -1,45 +1,133 @@
-var express = require('express');
-var router = express.Router();
+var app = require('express')();
+
+// Body parsing
 var bodyParser = require('body-parser');
+app.use(bodyParser.urlencoded({extended: true}));
+app.use(bodyParser.json());
+
+// Validation
 var expressValidator = require('express-validator');
-router.use(bodyParser.urlencoded({extended: true}));
-router.use(bodyParser.json());
-router.use(expressValidator());
+app.use(expressValidator());
 
+// Child process, for spawning youtube-dl
 var child_process = require('child_process');
 
+// The location of the youtube-dl executable
+var YOUTUBE_DL_LOC = '/usr/bin/youtube-dl'
+
+// Keep track of music to play, playing, and played
+var playlist = [];
+var playing = 'None';
+var played = [];
+
 var Player = require('player');
-var player = new Player();
 
-var YOUTUBE_DL_LOC = '/usr/local/bin/youtube-dl'
+// Create a player with the proper error handling.
+function playerCreator(song) {
+    if (song)
+	return new Player(song)
+	.on('error', function(err) {playerHandleError(playlist, played)})
+    return new Player()
+	.on('error', function(err) {playerHandleError(playlist, played)})
+}
+
+player = playerCreator();
+
+// Player functionality
+
+// Songs move from playlist (if nothing is playing presently), to playing, to played.
+
+// TODO check if song already exists in played.
+
+// event: on error (No next song was found).
+function playerHandleError(playlist, played) {
+
+    // TODO Workaround for a bug in player: wait a couple seconds so the
+    // songs don't overlap.
+    
+    // Move the recently playing song to played.
+    played.push(playing);
+
+    if (playlist.length != 0) {
+	// Play the next song.
+	player = playerCreator(playlist[0]);
+	player.play();
+
+	// Remove the added song.
+	playing = playlist[0];
+	playlist.shift();
+    } else {
+	// Reset the object, resetting its playlist.
+	player = playerCreator();
+	playing = 'None';
+    }
+}
+
+// Add a song and start the playlist, if it's empty.
+function playerAddSong(song) {
+    if (player.list.length == 0) {
+	// If this is the player's first song, start it.
+	player = playerCreator(song);
+	player.play();
+	playing = song;
+    } else { 
+	// Otherwise add it to the queue
+	playlist.push(song);
+    }
+
+}
+
 
 /* GET home page. */
-router.get('/', function(req, res, next) {
-    var playlist;
-    if(player.list.length) {
-	playlist = '<ul>';
-	for(var i=0; i < player.list.length; i++) {
-	    playlist +=
+app.get('/', function(req, res, next) {
+    var playlist_view;
+    if(playlist.length) {
+	playlist_view = '<p>Playlist:</p><ul>';
+	for(var i=0; i < playlist.length; i++) {
+	    playlist_view +=
+		'<li>' +
+		playlist[i].replace(/^\.\/downloads\//, '') .replace(/\.mp3$/, '') +
+		'</li>';
+	}
+	playlist_view += '</ul>';
+    } else {
+	playlist_view = '<p>No songs in playlist.</p>';
+    }
+    var playing_view = '<p>Now playing: ' + playing.replace(/^\.\/downloads\//, '') .replace(/\.mp3$/, '') + '</p>';
+    var played_view;
+    if(played.length) {
+	played_view = '<p>Played:</p><ul>';
+	for(var i=0; i < played.length; i++) {
+	    played_view +=
 		'<li>' +
-		player.list[i].replace(/^\.\/downloads\//, '') .replace(/\.mp3$/, '') +
+		played[i].replace(/^\.\/downloads\//, '') .replace(/\.mp3$/, '') +
 		'</li>';
 	}
-	playlist += '</ul>';
+	played_view += '</ul>';
     } else {
-	playlist = '<p>No songs in playlist.</p>';
+	played_view = '<p>No played songs.</p>';
     }
-    res.render('index', { playlist: playlist });
+    res.render('index', { playlist_view: playlist_view,
+			  playing_view: playing_view,
+			  played_view: played_view });
 });
 
-router.get('/youtube', function(req, res, next) {
+app.get('/youtube', function(req, res, next) {
   res.render('youtube');
 });
 
-router.use(expressValidator({
+app.use(expressValidator({
     customValidators: {
 	dlSuccess: function(video) {
 	    // Test if the requested video is available.
+	    // TODO make this non-blocking so music doesn't stop
 	    var youtube_dl = child_process.spawnSync(YOUTUBE_DL_LOC, ['-s', video]);
+
+	    // DEBUG: for when I forget to change the var
+	    if(youtube_dl.stderr == null) {
+		console.log("Your youtube-dl location is probably invalid.");
+	    }
+
 	    if (youtube_dl.stderr.toString()) {
 		return false;
 	    }
@@ -49,7 +137,7 @@ router.use(expressValidator({
  }
 ));
 
-router.post('/youtube', function(req, res) {
+app.post('/youtube', function(req, res) {
     var video = req.body.video;
     
     req.checkBody('video', 'URL is not valid.').dlSuccess();
@@ -73,15 +161,20 @@ router.post('/youtube', function(req, res) {
 
             if(!error) {
                 var youtube_dl_get_title = child_process.spawnSync(YOUTUBE_DL_LOC, ['--get-title', video]);
-                player.add('./downloads/' + youtube_dl_get_title.stdout.toString().replace('\n', '') + ".mp3");
+		console.log(youtube_dl_get_title.stdout.toString());
+                playerAddSong('./downloads/' + youtube_dl_get_title.stdout.toString()
+			      .replace('\n', '')
+			      .replace(new RegExp('"', 'g'), '\'')
+			      + ".mp3");
             }
             res.redirect('/');
         });
     }
 });
 
-router.get('/file', function(req, res, next) {
+app.get('/file', function(req, res, next) {
   res.render('file');
 });
 
-module.exports = router;
+
+module.exports = app;

routes/player-demo.js

@@ -0,0 +1,18 @@
+var Player = require('player');
+var player = new Player();
+
+playerAddSong('./downloads/\'IS THAT A MAN RIDING A SHRIMP\'.mp3');
+
+// event: on error (No next song was found)
+player.on('error', function(err){
+  // Reset the object, resetting the playlist.
+  player = new Player();
+});
+
+// Add a song and start the playlist, if it's empty
+function playerAddSong(song) {
+    player.add(song);
+  if (player.list.length == 1) {
+    player.play();
+  }
+}

views/index.hbs

@@ -1,5 +1,11 @@
 <h1>LAN Jukebox</h1>
 <a href="/youtube">Add a Youtube video</a><br/>
 <a href="/file">Add a music file</a><br/>
-{{{playlist}}}
+{{{playlist_view}}}
+{{{playing_view}}}
+{{{played_view}}}
 <p>Allan put music player here</p>
+<script src="/socket.io/socket.io.js"></script>
+<script>
+  var socket = io();
+</script>