src/de/steamwar/network/packets/NetworkHandler.java

@@ -0,0 +1,28 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets;
+
+import de.steamwar.network.packets.common.FightInfoPacket;
+import de.steamwar.network.packets.common.FightEndsPacket;
+
+public interface NetworkHandler {
+    void handle(FightEndsPacket packet);
+    void handle(FightInfoPacket packet);
+}

src/de/steamwar/network/packets/NetworkPacket.java

@@ -0,0 +1,43 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets;
+
+import java.io.Serializable;
+
+public abstract class NetworkPacket implements Serializable {
+
+    private final Sender sender;
+
+    public NetworkPacket(Sender sender) {
+        this.sender = sender;
+    }
+
+    public Sender getSender() {
+        return sender;
+    }
+
+    public abstract void handle(NetworkHandler handler);
+
+    public enum Sender {
+        SERVER,
+        CLIENT,
+        BOTH
+    }
+}

src/de/steamwar/network/packets/client/ClientNetworkHandler.java

@@ -0,0 +1,30 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.*;
+
+public interface ClientNetworkHandler {
+    void handle(BaumemberUpdatePacket packet);
+    void handle(CloseInventoryPacket packet);
+    void handle(InventoryPacket packet);
+    void handle(PingPacket packet);
+    void handle(StartingServerPacket packet);
+}

src/de/steamwar/network/packets/client/ClientPacket.java

@@ -0,0 +1,37 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.NetworkHandler;
+import de.steamwar.network.packets.NetworkPacket;
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+
+public abstract class ClientPacket extends NetworkPacket {
+    public ClientPacket() {
+        super(Sender.CLIENT);
+    }
+
+    @Override
+    public void handle(NetworkHandler handler) {
+        handle((ServerNetworkHandler) handler);
+    }
+
+    public abstract void handle(ServerNetworkHandler handler);
+}

src/de/steamwar/network/packets/client/ExecuteCommandPacket.java

@@ -0,0 +1,36 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+import lombok.Data;
+
+@Data
+public class ExecuteCommandPacket extends ClientPacket {
+
+    private static final long serialVersionUID = 6283457297487602016L;
+    private int playerId;
+    private String command;
+
+    @Override
+    public void handle(ServerNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/client/ImALobbyPacket.java

@@ -0,0 +1,33 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+import lombok.Data;
+
+@Data
+public class ImALobbyPacket extends ClientPacket {
+    private static final long serialVersionUID = 8110246509205246654L;
+
+    @Override
+    public void handle(ServerNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/client/InventoryCallbackPacket.java

@@ -0,0 +1,87 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+import lombok.Data;
+
+@Data
+public class InventoryCallbackPacket extends ClientPacket {
+    private static final long serialVersionUID = -261823209186008718L;
+    private int position;
+    private int owner;
+    private CallbackType type;
+    private ClickType clickType;
+
+    @Override
+    public void handle(ServerNetworkHandler handler) {
+        handler.handle(this);
+    }
+
+    public enum CallbackType {
+        CLICK,
+        CLOSE,
+    }
+
+    public enum ClickType {
+        LEFT,
+        SHIFT_LEFT,
+        RIGHT,
+        SHIFT_RIGHT,
+        WINDOW_BORDER_LEFT,
+        WINDOW_BORDER_RIGHT,
+        MIDDLE,
+        NUMBER_KEY,
+        DOUBLE_CLICK,
+        DROP,
+        CONTROL_DROP,
+        CREATIVE,
+        UNKNOWN;
+
+        public boolean isKeyboardClick() {
+            return this == NUMBER_KEY || this == DROP || this == CONTROL_DROP;
+        }
+
+        public boolean isCreativeAction() {
+            return this == MIDDLE || this == CREATIVE;
+        }
+
+        public boolean isRightClick() {
+            return this == RIGHT || this == SHIFT_RIGHT;
+        }
+
+        public boolean isLeftClick() {
+            return this == LEFT || this == SHIFT_LEFT || this == DOUBLE_CLICK || this == CREATIVE;
+        }
+
+        public boolean isShiftClick() {
+            return this == SHIFT_LEFT || this == SHIFT_RIGHT || this == CONTROL_DROP;
+        }
+
+        public static ClickType getByName(String name) {
+            for (ClickType type : values()) {
+                if (type.name().equalsIgnoreCase(name)) {
+                    return type;
+                }
+            }
+            return UNKNOWN;
+        }
+    }
+}

src/de/steamwar/network/packets/client/PrepareSchemPacket.java

@@ -0,0 +1,37 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+import lombok.Data;
+
+@Data
+public class PrepareSchemPacket extends ClientPacket {
+
+    private static final long serialVersionUID = -4798561188105813349L;
+    private int player;
+    private int schem;
+    private int schemType;
+
+    @Override
+    public void handle(ServerNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/client/TablistNamePacket.java

@@ -0,0 +1,36 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.client;
+
+import de.steamwar.network.packets.server.ServerNetworkHandler;
+import lombok.Data;
+
+@Data
+public class TablistNamePacket extends ClientPacket {
+
+    private static final long serialVersionUID = -1709089784235478752L;
+    private int player;
+    private String tablistName;
+
+    @Override
+    public void handle(ServerNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/common/CommonPacket.java

@@ -0,0 +1,28 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.common;
+
+import de.steamwar.network.packets.NetworkPacket;
+
+public abstract class CommonPacket extends NetworkPacket {
+    public CommonPacket() {
+        super(Sender.BOTH);
+    }
+}

src/de/steamwar/network/packets/common/FightEndsPacket.java

@@ -0,0 +1,42 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.common;
+
+import de.steamwar.network.packets.NetworkHandler;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class FightEndsPacket extends CommonPacket {
+
+    private static final long serialVersionUID = 1279352415549011332L;
+    private byte win;
+    private int blueSchem;
+    private int redSchem;
+    private List<Integer> bluePlayers;
+    private List<Integer> redPlayers;
+    private String gameMode;
+
+    @Override
+    public void handle(NetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/common/FightInfoPacket.java

@@ -0,0 +1,50 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.common;
+
+import de.steamwar.network.packets.NetworkHandler;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class FightInfoPacket extends CommonPacket{
+
+    private static final long serialVersionUID = 7448644597856605853L;
+    private String serverName; // Name of the Server
+    private String gameMode; // GameMode aka Schematictype (if known, else "")
+    private String arena; // Name of the arena
+    private String blueName; // Name of the blue team, expected to begin with "§a" colorcode
+    private String redName; // Name of the red team, expected to begin with "§a" colorcode
+    private String fightState; // Fight state (technical term) (if known, else "")
+    private int countdown; // Countdown state in seconds (if known, else 0)
+    private int blueLeader; // SWUserID of the blue team leader (if known, else 0)
+    private int redLeader; // SWUserID of the red team leader (if known, else 0)
+    private int blueSchem; // Blue SchemID (if known, else 0)
+    private int redSchem; // Red SchemID (if known, else 0)
+    private List<Integer> bluePlayers; // List of Blue SWUserIDs
+    private List<Integer> redPlayers; // List of Red SWUserIDs
+    private List<Integer> spectators; // List of Spectator SWUserIDs
+
+    @Override
+    public void handle(NetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/server/BaumemberUpdatePacket.java

@@ -0,0 +1,33 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+import lombok.Data;
+
+@Data
+public class BaumemberUpdatePacket extends ServerPacket{
+    private static final long serialVersionUID = 6863118892424244051L;
+
+    @Override
+    public void handle(ClientNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/server/CloseInventoryPacket.java

@@ -0,0 +1,35 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+import lombok.Data;
+
+@Data
+public class CloseInventoryPacket extends ServerPacket {
+
+    private static final long serialVersionUID = -2191021190060504521L;
+    private int playerId;
+
+    @Override
+    public void handle(ClientNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/server/InventoryPacket.java

@@ -0,0 +1,40 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+import lombok.Data;
+
+import java.util.Map;
+
+@Data
+public class InventoryPacket extends ServerPacket {
+
+    private static final long serialVersionUID = 8071052544654047316L;
+    private String title;
+    private int player;
+    private int size;
+    private Map<Integer, String> items;
+
+    @Override
+    public void handle(ClientNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/server/PingPacket.java

@@ -0,0 +1,32 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+
+public class PingPacket extends ServerPacket {
+    private static final long serialVersionUID = 714647343959550378L;
+    private int id;
+
+    @Override
+    public void handle(ClientNetworkHandler handler) {
+        handler.handle(this);
+    }
+}

src/de/steamwar/network/packets/server/ServerNetworkHandler.java

@@ -0,0 +1,30 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.*;
+
+public interface ServerNetworkHandler {
+    void handle(ExecuteCommandPacket packet);
+    void handle(ImALobbyPacket packet);
+    void handle(InventoryCallbackPacket packet);
+    void handle(PrepareSchemPacket packet);
+    void handle(TablistNamePacket packet);
+}

src/de/steamwar/network/packets/server/ServerPacket.java

@@ -0,0 +1,37 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.NetworkHandler;
+import de.steamwar.network.packets.NetworkPacket;
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+
+public abstract class ServerPacket extends NetworkPacket {
+    public ServerPacket() {
+        super(Sender.SERVER);
+    }
+
+    @Override
+    public void handle(NetworkHandler handler) {
+        handle((ClientNetworkHandler) handler);
+    }
+
+    public abstract void handle(ClientNetworkHandler handler);
+}

src/de/steamwar/network/packets/server/StartingServerPacket.java

@@ -0,0 +1,34 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.network.packets.server;
+
+import de.steamwar.network.packets.client.ClientNetworkHandler;
+import lombok.Data;
+
+@Data
+public class StartingServerPacket extends ServerPacket {
+    private static final long serialVersionUID = 2808607245898121801L;
+    private int user;
+
+    @Override
+    public void handle(ClientNetworkHandler handler) {
+        handler.handle(this);
+    }
+}