Limit the amount of vehicles that a player can spawn (#340)

src/main/java/emu/grasscutter/game/entity/EntityVehicle.java

@@ -18,24 +18,30 @@ import emu.grasscutter.net.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 import emu.grasscutter.net.proto.SceneGadgetInfoOuterClass.SceneGadgetInfo;
 import emu.grasscutter.net.proto.VectorOuterClass.Vector;
 import emu.grasscutter.net.proto.VehicleInfoOuterClass.*;
-
+import emu.grasscutter.net.proto.VehicleMemberOuterClass.*;
 import emu.grasscutter.utils.Position;
 import emu.grasscutter.utils.ProtoHelper;
 
 import it.unimi.dsi.fastutil.ints.Int2FloatMap;
 import it.unimi.dsi.fastutil.ints.Int2FloatOpenHashMap;
 
+import java.util.List;
+import java.util.ArrayList;
+
 public class EntityVehicle extends EntityBaseGadget {
+
 	private final Player owner;
 	private final Int2FloatOpenHashMap fightProp;
 
 	private final Position pos;
 	private final Position rot;
 
-	private float curStamina;
 	private final int pointId;
 	private final int gadgetId;
 
+	private float curStamina;
+	private List<VehicleMember> vehicleMembers;
+
 	public EntityVehicle(Scene scene, Player player, int gadgetId, int pointId, Position pos, Position rot) {
 		super(scene);
 		this.owner = player;
@@ -46,6 +52,7 @@ public class EntityVehicle extends EntityBaseGadget {
 		this.gadgetId = gadgetId;
 		this.pointId = pointId;
 		this.curStamina = 240;
+		this.vehicleMembers = new ArrayList<VehicleMember>();
 	}
 
 	@Override
@@ -61,6 +68,8 @@ public class EntityVehicle extends EntityBaseGadget {
 
 	public int getPointId() { return pointId; }
 
+	public List<VehicleMember> getVehicleMembers() { return vehicleMembers; }
+
 	@Override
 	public Int2FloatOpenHashMap getFightProperties() {
 		return fightProp;

src/main/java/emu/grasscutter/server/packet/send/PacketVehicleInteractRsp.java

 package emu.grasscutter.server.packet.send;
 
 import emu.grasscutter.Grasscutter;
+import emu.grasscutter.game.entity.EntityVehicle;
 import emu.grasscutter.game.player.Player;
 import emu.grasscutter.game.entity.GameEntity;
 
@@ -17,16 +18,49 @@ public class PacketVehicleInteractRsp extends BasePacket {
 		VehicleInteractRsp.Builder proto = VehicleInteractRsp.newBuilder();
 
 		GameEntity vehicle = player.getScene().getEntityById(entityId);
-		if(vehicle != null) {
+
+		if(vehicle instanceof EntityVehicle) {
 			proto.setEntityId(vehicle.getId());
-			proto.setInteractType(interactType);
 
 			VehicleMember vehicleMember = VehicleMember.newBuilder()
 					.setUid(player.getUid())
 					.setAvatarGuid(player.getTeamManager().getCurrentCharacterGuid())
 					.build();
 
+			proto.setInteractType(interactType);
 			proto.setMember(vehicleMember);
+
+			switch(interactType){
+				case VEHICLE_INTERACT_IN -> {
+					((EntityVehicle) vehicle).getVehicleMembers().add(vehicleMember);
+				}
+				case VEHICLE_INTERACT_OUT -> {
+					((EntityVehicle) vehicle).getVehicleMembers().remove(vehicleMember);
+				}
+				default -> {}
+			}
+		}
+		this.setData(proto.build());
+	}
+
+	public PacketVehicleInteractRsp(EntityVehicle vehicle, VehicleMember vehicleMember, VehicleInteractType interactType) {
+		super(PacketOpcodes.VehicleInteractRsp);
+		VehicleInteractRsp.Builder proto = VehicleInteractRsp.newBuilder();
+
+		if(vehicle != null) {
+			proto.setEntityId(vehicle.getId());
+			proto.setInteractType(interactType);
+			proto.setMember(vehicleMember);
+
+			switch(interactType){
+				case VEHICLE_INTERACT_IN -> {
+					vehicle.getVehicleMembers().add(vehicleMember);
+				}
+				case VEHICLE_INTERACT_OUT -> {
+					vehicle.getVehicleMembers().remove(vehicleMember);
+				}
+				default -> {}
+			}
 		}
 		this.setData(proto.build());
 	}

src/main/java/emu/grasscutter/server/packet/send/PacketVehicleSpawnRsp.java

@@ -8,10 +8,16 @@ import emu.grasscutter.game.entity.GameEntity;
 
 import emu.grasscutter.net.packet.BasePacket;
 import emu.grasscutter.net.packet.PacketOpcodes;
+
+import emu.grasscutter.net.proto.VehicleMemberOuterClass.VehicleMember;
 import emu.grasscutter.net.proto.VehicleSpawnRspOuterClass.VehicleSpawnRsp;
 
 import emu.grasscutter.utils.Position;
-import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+
+import java.util.List;
+
+
+import static emu.grasscutter.net.proto.VehicleInteractTypeOuterClass.VehicleInteractType.VEHICLE_INTERACT_OUT;
 
 public class PacketVehicleSpawnRsp extends BasePacket {
 
@@ -19,6 +25,23 @@ public class PacketVehicleSpawnRsp extends BasePacket {
 		super(PacketOpcodes.VehicleSpawnRsp);
 		VehicleSpawnRsp.Builder proto = VehicleSpawnRsp.newBuilder();
 
+		// Eject vehicle members and Kill previous vehicles if there are any
+		List<GameEntity> previousVehicles = player.getScene().getEntities().values().stream()
+				.filter(entity -> entity instanceof EntityVehicle
+						&& ((EntityVehicle) entity).getGadgetId() == vehicleId
+						&& ((EntityVehicle) entity).getOwner().equals(player))
+				.toList();
+
+		previousVehicles.stream().forEach(entity -> {
+			List<VehicleMember> vehicleMembers = ((EntityVehicle) entity).getVehicleMembers().stream().toList();
+
+			vehicleMembers.stream().forEach(vehicleMember -> {
+				player.getScene().broadcastPacket(new PacketVehicleInteractRsp(((EntityVehicle) entity), vehicleMember, VEHICLE_INTERACT_OUT));
+			});
+
+			player.getScene().killEntity(entity, 0);
+		});
+
 		EntityVehicle vehicle = new EntityVehicle(player.getScene(), player, vehicleId, pointId, pos, rot);
 
 		switch (vehicleId) {