Add isolated chat option.

src/com/garbagemule/MobArena/ArenaImpl.java

@@ -94,6 +94,7 @@ public class ArenaImpl implements Arena
     private List<ItemStack> entryFee;
     private TimeStrategy timeStrategy;
     private AutoStartTimer autoStartTimer;
+    private boolean isolatedChat;
     
     // Scoreboards
     private ScoreboardManager scoreboard;
@@ -158,6 +159,8 @@ public class ArenaImpl implements Arena
         
         int autoStart       = settings.getInt("auto-start-timer", 0);
         this.autoStartTimer = new AutoStartTimer(this, autoStart);
+
+        this.isolatedChat  = settings.getBoolean("isolated-chat", false);
         
         String timeString = settings.getString("player-time-in-arena", "world");
         Time time = Enums.getEnumFromString(Time.class, timeString);
@@ -1361,6 +1364,11 @@ public class ArenaImpl implements Arena
         
         return false;
     }
+
+    @Override
+    public boolean hasIsolatedChat() {
+        return isolatedChat;
+    }
         
     /**
      * The "perfect equals method" cf. "Object-Oriented Design and Patterns"

src/com/garbagemule/MobArena/framework/Arena.java

@@ -237,4 +237,6 @@ public interface Arena
     public boolean canJoin(Player p);
     
     public boolean canSpec(Player p);
+
+    public boolean hasIsolatedChat();
 }

src/com/garbagemule/MobArena/listeners/MAGlobalListener.java

@@ -204,6 +204,16 @@ public class MAGlobalListener implements Listener
             arena.getEventListener().onPlayerBucketEmpty(event);
     }
 
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void playerChat(AsyncPlayerChatEvent event) {
+        if (!am.isEnabled()) return;
+
+        Arena arena = am.getArenaWithPlayer(event.getPlayer());
+        if (arena == null || !arena.hasIsolatedChat()) return;
+
+        event.getRecipients().retainAll(arena.getAllPlayers());
+    }
+
     @EventHandler(priority = EventPriority.LOWEST)
     public void playerCommandPreprocess(PlayerCommandPreprocessEvent event) {
         if (!am.isEnabled()) return;