Added two methods to ClientHandler that send messages to multiple lobbies, this is needed for the gui interaction with multiple clients

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/helpers/GuiParameters.java

@@ -1,7 +1,7 @@
 package ch.unibas.dmi.dbis.cs108.multiplayer.helpers;
 
 /**
- * This class contains all parameters for the PTGUI protocol message
+ * This class contains parameters for the PTGUI protocol message
  */
 public class GuiParameters {
 
@@ -15,7 +15,7 @@ public class GuiParameters {
   public static final String listOfLobbies = "LOBBIES";
 
   /**
-   * Tells Gui, that what follows is a list of players (per Lobby?)
+   * Tells Gui, that what follows is a list of players per Lobby
    */
   public static final String listOfPLayers = "PLAYERS";
 

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java

@@ -305,6 +305,35 @@ public class ClientHandler implements Runnable {
     }
   }
 
+  /**
+   * Sends a given message to all connected client. The message has to already be protocol-formatted.
+   *
+   * @param msg the given message. Should already be protocol-formatted.
+   */
+  public void sendMsgToAllClients(String msg) {
+    for (ClientHandler client : connectedClients) {
+      client.sendMsgToClient(msg);
+    }
+  }
+
+  /**
+   * Sends a Message to all clients in the same lobby. The message has to already be protocol-formatted.
+   * @param msg the given message. Should already be protocol-formatted.
+   */
+  public void sendMsgToClientsInLobby(String msg) {
+    Lobby l = getLobby();
+    if (l != null) {
+      //System.out.println(msg);    we can-comment this if you want lobby-announcements to print on the server console as well.
+      for (ClientHandler client : l.getLobbyClients()) {
+        client.sendMsgToClient(msg);
+      }
+    } else {
+      LOGGER.debug("Could not send announcements; probably client isn't in a lobby."
+          + "Will send across all lobbies now.");
+      sendMsgToAllClients(msg);
+    }
+  }
+
   /**
    * Decode a whisper message
    *