From 1f75f7bf30400bc0f14fb345b6996477126fd8c8 Mon Sep 17 00:00:00 2001
From: Tamino Mueller <tamino.mueller@unibw.de>
Date: Tue, 8 Oct 2024 20:49:19 +0200
Subject: [PATCH] Task 8

---
 .../game/server/ServerGameLogic.java          | 42 ++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerGameLogic.java b/Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerGameLogic.java
index a5987fa..1980d29 100644
--- a/Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerGameLogic.java
+++ b/Projekte/battleship/model/src/main/java/pp/battleship/game/server/ServerGameLogic.java
@@ -140,10 +140,19 @@ public class ServerGameLogic implements ClientInterpreter {
      */
     @Override
     public void received(MapMessage msg, int from) {
+        List<Battleship> ships = msg.getShips();
         if (state != ServerState.SET_UP)
             LOGGER.log(Level.ERROR, "playerReady not allowed in {0}", state); //NON-NLS
         else
-            playerReady(getPlayerById(from), msg.getShips());
+
+
+        if (!shipsValid(ships)){
+            LOGGER.log(Level.ERROR, "ship placement by player {0} is Invalid", from);
+            send(getPlayerById(from),null);
+            return;
+        }
+
+        playerReady(getPlayerById(from), msg.getShips());
     }
 
     /**
@@ -217,4 +226,35 @@ public class ServerGameLogic implements ClientInterpreter {
             }
         }
     }
+
+    private boolean isInBounds(Battleship ship){
+        return ship.getMinX() >= 0 && ship.getMaxX() < config.getMapWidth() &&
+               ship.getMinY() >= 0 && ship.getMaxY() < config.getMapHeight();
+    }
+
+
+
+    private boolean shipsValid(List<Battleship> ships) {
+
+        Set<IntPoint> occupied = new HashSet<>();
+
+        for (Battleship ship : ships) {
+            if (!isInBounds(ship)){
+                return false;
+            }
+            for (int x = ship.getMinX(); x <= ship.getMaxX(); x++) {
+                for (int y = ship.getMinY(); y <= ship.getMaxY(); y++) {
+                    IntPoint point = new IntPoint(x,y);
+                    if (!occupied.add(point)){
+                        return false;
+
+                    }
+
+                }
+            }
+        }
+        return true;
+    }
+
+
 }