Added the ability to load an entire playlist from youtube.

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.github.andrewlalis</groupId>
     <artifactId>HandieBot</artifactId>
-    <version>1.5.3</version>
+    <version>1.6.0</version>
     <build>
         <plugins>
             <plugin>

src/main/java/handiebot/command/commands/music/PlayCommand.java

@@ -1,19 +1,26 @@
 package handiebot.command.commands.music;
 
 import com.google.api.services.youtube.model.Video;
+import com.sedmelluq.discord.lavaplayer.player.AudioLoadResultHandler;
+import com.sedmelluq.discord.lavaplayer.tools.FriendlyException;
+import com.sedmelluq.discord.lavaplayer.track.AudioPlaylist;
+import com.sedmelluq.discord.lavaplayer.track.AudioTrack;
 import handiebot.HandieBot;
 import handiebot.command.CommandContext;
+import handiebot.command.Commands;
 import handiebot.command.ReactionHandler;
 import handiebot.command.reactionListeners.YoutubePlayListener;
 import handiebot.command.types.ContextCommand;
 import handiebot.lavaplayer.playlist.UnloadedTrack;
 import handiebot.utils.MessageUtils;
 import handiebot.utils.YoutubeSearch;
+import handiebot.view.BotLog;
 import sx.blah.discord.handle.obj.IMessage;
 
 import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.ExecutionException;
 
 import static handiebot.HandieBot.resourceBundle;
 import static handiebot.utils.MessageUtils.sendMessage;
@@ -39,12 +46,51 @@ public class PlayCommand extends ContextCommand {
         } else {
             //Check if an actual URL is used, and if not, create a youtube request.
             if (context.getArgs()[0].startsWith("http")) {
+                if (context.getArgs()[0].contains("list") && Commands.hasPermission(context, 8)){
+                    try {
+                        HandieBot.musicPlayer.getPlayerManager().loadItem(context.getArgs()[0], new AudioLoadResultHandler() {
+                            @Override
+                            public void trackLoaded(AudioTrack track) {
+                                //This should not happen.
+                                HandieBot.log.log(BotLog.TYPE.ERROR, "Loaded song while attempting to load playlist.");
+                            }
+
+                            @Override
+                            public void playlistLoaded(AudioPlaylist playlist) {
+                                //This is expected to happen.
+                                HandieBot.log.log(BotLog.TYPE.MUSIC, "Loading a playlist named: "+playlist.getName()+" with "+playlist.getTracks().size()+" tracks.");
+                                MessageUtils.sendMessage("Songs from the playlist **"+playlist.getName()+"** have been added to the queue.", context.getChannel());
+                                HandieBot.musicPlayer.getMusicManager(context.getGuild()).scheduler.clearQueue();
+                                for (AudioTrack track : playlist.getTracks()){
+                                    HandieBot.log.log(BotLog.TYPE.MUSIC, "Added song from playlist: "+track.getInfo().title);
+                                    HandieBot.musicPlayer.getMusicManager(context.getGuild()).scheduler.getActivePlaylist().addTrack(new UnloadedTrack(track));
+                                }
+                            }
+
+                            @Override
+                            public void noMatches() {
+                                //Error that nothing was found.
+                                HandieBot.log.log(BotLog.TYPE.ERROR, "No matches while loading playlist.");
+                            }
+
+                            @Override
+                            public void loadFailed(FriendlyException exception) {
+                                //Error that loading failed.
+                                HandieBot.log.log(BotLog.TYPE.ERROR, "Loading failed while loading playlist.");
+                            }
+                        }).get();
+                        HandieBot.musicPlayer.playQueue(context.getGuild());
+                    } catch (InterruptedException | ExecutionException e) {
+                        e.printStackTrace();
+                    }
+                } else {
                     try {
                         HandieBot.musicPlayer.addToQueue(context.getGuild(), new UnloadedTrack(context.getArgs()[0]), context.getUser());
                     } catch (Exception e) {
                         sendMessage(MessageFormat.format(resourceBundle.getString("commands.command.play.songAddError"), context.getArgs()[0]), context.getChannel());
                         e.printStackTrace();
                     }
+                }
             } else {
                 //Construct a Youtube song choice.
                 List<Video> videos = YoutubeSearch.query(MessageUtils.getTextFromArgs(context.getArgs(), 0));

src/main/java/handiebot/command/commands/music/QueueCommand.java

@@ -37,6 +37,7 @@ public class QueueCommand extends ContextCommand {
 
     @Override
     public void execute(CommandContext context) {
+        //TODO: Ensure that queue embed never runs out of space.
         if (context.getArgs().length > 0){
             switch (context.getArgs()[0]){
                 case ("all"):
@@ -74,6 +75,7 @@ public class QueueCommand extends ContextCommand {
                     } else {
                         sendMessage(resourceBundle.getString("commands.command.queue.remove.error"), context.getChannel());
                     }
+                    break;
                 case ("move"):
                     if (context.getArgs().length == 3 && Commands.hasPermission(context, 8)){
                         int startIndex = Integer.parseInt(context.getArgs()[1]);
@@ -92,6 +94,7 @@ public class QueueCommand extends ContextCommand {
                     } else {
                         sendMessage(resourceBundle.getString("commands.command.queue.move.error"), context.getChannel());
                     }
+                    break;
             }
         } else {
             HandieBot.musicPlayer.showQueueList(context.getGuild(), false);

src/main/java/handiebot/lavaplayer/playlist/UnloadedTrack.java

@@ -17,7 +17,7 @@ import static handiebot.HandieBot.log;
  * This is useful for quickly loading playlists and only loading a track when it is needed.
  */
 public class UnloadedTrack implements Cloneable {
-
+//TODO: Externalize strings.
     private String title;
     private String url;
     private long duration;