fix: prevent EndRoundRequests and invalid pausing

Server/src/main/java/uulm/teamname/marvelous/server/lobby/pipelining/PauseSegment.java

@@ -4,6 +4,7 @@ import org.tinylog.Logger;
 import uulm.teamname.marvelous.gamelibrary.events.Event;
 import uulm.teamname.marvelous.gamelibrary.events.EventBuilder;
 import uulm.teamname.marvelous.gamelibrary.events.EventType;
+import uulm.teamname.marvelous.gamelibrary.messages.ParticipantType;
 import uulm.teamname.marvelous.gamelibrary.requests.Request;
 import uulm.teamname.marvelous.gamelibrary.requests.RequestBuilder;
 import uulm.teamname.marvelous.gamelibrary.requests.RequestType;
@@ -72,6 +73,11 @@ public class PauseSegment implements Segment {
         // check if there is a pause request (either start or stop)
         if (packet.contains(new RequestBuilder(RequestType.PauseStartRequest).buildGameRequest())) {
             Logger.trace("PauseStartRequest found");
+            if(packet.getOrigin().type == ParticipantType.Spectator || packet.getOrigin().isAI) {
+                Logger.trace("Invalid pause start request. Aborting");
+                abort.set(true);
+                return;
+            }
             if (!paused) {
                 // pause the game
                 pauseGame();
@@ -85,6 +91,11 @@ public class PauseSegment implements Segment {
             }
         } else if (packet.contains(new RequestBuilder(RequestType.PauseStopRequest).buildGameRequest())) {
             Logger.trace("PauseStopRequest found");
+            if(packet.getOrigin().type == ParticipantType.Spectator || packet.getOrigin().isAI) {
+                Logger.trace("Invalid pause stop request. Aborting");
+                abort.set(true);
+                return;
+            }
             if (paused) {
                 pauseEnd();
                 Logger.debug("Game unpaused.");

Server/src/main/java/uulm/teamname/marvelous/server/lobby/pipelining/RequestTurnEndSegment.java

@@ -0,0 +1,36 @@
+package uulm.teamname.marvelous.server.lobby.pipelining;
+
+import org.tinylog.Logger;
+import uulm.teamname.marvelous.gamelibrary.entities.EntityType;
+import uulm.teamname.marvelous.gamelibrary.events.Event;
+import uulm.teamname.marvelous.gamelibrary.gamelogic.GameInstance;
+import uulm.teamname.marvelous.gamelibrary.messages.ParticipantType;
+import uulm.teamname.marvelous.gamelibrary.messages.server.EventMessage;
+import uulm.teamname.marvelous.gamelibrary.requests.RequestType;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * The {@link RequestTurnEndSegment} handles requests of {@link RequestType} EndRoundRequest. It filters invalid turn end requests.
+ */
+public class RequestTurnEndSegment implements Segment {
+
+    private final GameInstance game;
+
+
+    public RequestTurnEndSegment(GameInstance game) {
+        this.game = game;
+    }
+
+    @Override
+    public void processRequests(Packet packet, List<Event> carrier, AtomicBoolean abort) {
+        Logger.trace("RequestTurnEndSegment received {} requests", packet.size());
+        var active = game.state.getActiveCharacter().type;
+        var from = packet.getOrigin().type == ParticipantType.PlayerOne ? EntityType.P1 : EntityType.P2;
+        if (packet.containsRequestOfType(RequestType.EndRoundRequest) && active != from) {
+            Logger.trace("Invalid end turn request. Aborting");
+            abort.set(true);
+        }
+    }
+}

Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/LobbyManager.java

@@ -212,7 +212,7 @@ public class LobbyManager {
     public void removeLobby(String lobbyID) {
         lobbies.remove(lobbyID);
     }
-    
+
     /**
      *  Adds a participant to a lobby. If the maximum amount of lobbies is already filled, or if the lobby requested
      * isn't free, the participant is disconnected.
@@ -242,7 +242,7 @@ public class LobbyManager {
 
         Logger.trace("New participant '{}' has the role '{}'", client.getId(), type);
 
-        Participant participant = new Participant(client, lobbyID, type);
+        Participant participant = new Participant(client, lobbyID, type, role == RoleEnum.KI);
         participants.put(client.getId(), participant);
 
         lobby.addParticipant(participant);

Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/Participant.java

@@ -13,12 +13,14 @@ public class Participant {
     public ParticipantState state = ParticipantState.Assigned;
     public final ParticipantType type;
     public boolean disconnected = false;
+    public final boolean isAI;
 
-    public Participant(Client client, String lobby, ParticipantType type) {
+    public Participant(Client client, String lobby, ParticipantType type, boolean ai) {
         this.client = client;
         this.id = client.getId();
         this.lobby = lobby;
         this.type = type;
+        this.isAI = ai;
     }
 
     public void setClient(Client client) {