From 1a188f6bbd4a0bb8f96ce94ad87e666a31332a62 Mon Sep 17 00:00:00 2001
From: schrom01 <schrom01@students.zhaw.ch>
Date: Tue, 12 Apr 2022 14:26:26 +0200
Subject: [PATCH] Fixed Problem "Empty Messages can be sent" if receiver != *

---
 .../zhaw/pm2/multichat/client/ClientConnectionHandler.java   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/client/src/main/java/ch/zhaw/pm2/multichat/client/ClientConnectionHandler.java b/client/src/main/java/ch/zhaw/pm2/multichat/client/ClientConnectionHandler.java
index fb57727..22e4ce2 100644
--- a/client/src/main/java/ch/zhaw/pm2/multichat/client/ClientConnectionHandler.java
+++ b/client/src/main/java/ch/zhaw/pm2/multichat/client/ClientConnectionHandler.java
@@ -202,9 +202,12 @@ public class ClientConnectionHandler implements Runnable {
         if (state != CONNECTED) throw new ChatProtocolException("Illegal state for message: " + state);
 
         Matcher matcher = messagePattern.matcher(messageString);
-        if (messageString != "" && matcher.find()) {
+        if (matcher.find()) {
             String receiver = matcher.group(1);
             String message = matcher.group(2);
+            if(message.length() < 1){
+                return false;
+            }
             if (receiver == null || receiver.isBlank()) receiver = ClientConnectionHandler.USER_ALL;
             this.sendData(userName, receiver, DATA_TYPE_MESSAGE,message);
             return true;