Add EntityDeathEvent and implementations

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

@@ -30,6 +30,7 @@ import emu.grasscutter.net.proto.SceneAvatarInfoOuterClass.SceneAvatarInfo;
 import emu.grasscutter.net.proto.SceneEntityAiInfoOuterClass.SceneEntityAiInfo;
 import emu.grasscutter.net.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 import emu.grasscutter.net.proto.VectorOuterClass.Vector;
+import emu.grasscutter.server.event.player.PlayerMoveEvent;
 import emu.grasscutter.server.packet.send.PacketAvatarFightPropUpdateNotify;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropChangeReasonNotify;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
@@ -108,12 +109,16 @@ public class EntityAvatar extends GameEntity {
 
     @Override
     public void onDeath(int killerId) {
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
+
         this.killedType = PlayerDieType.PLAYER_DIE_TYPE_KILL_BY_MONSTER;
         this.killedBy = killerId;
         clearEnergy(ChangeEnergyReason.CHANGE_ENERGY_REASON_NONE);
     }
 
 	public void onDeath(PlayerDieType dieType, int killerId) {
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
+
 		this.killedType = dieType;
 		this.killedBy = killerId;
 		clearEnergy(ChangeEnergyReason.CHANGE_ENERGY_REASON_NONE);

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

@@ -13,6 +13,6 @@ public abstract class EntityBaseGadget extends GameEntity {
 
 	@Override
 	public void onDeath(int killerId) {
-		
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
 	}
 }

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

@@ -3,7 +3,6 @@ package emu.grasscutter.game.entity;
 import emu.grasscutter.game.player.Player;
 import emu.grasscutter.game.props.PlayerProperty;
 import emu.grasscutter.game.world.Scene;
-import emu.grasscutter.game.world.World;
 import emu.grasscutter.net.proto.AbilitySyncStateInfoOuterClass.AbilitySyncStateInfo;
 import emu.grasscutter.net.proto.AnimatorParameterValueInfoPairOuterClass.AnimatorParameterValueInfoPair;
 import emu.grasscutter.net.proto.ClientGadgetInfoOuterClass;
@@ -11,7 +10,6 @@ import emu.grasscutter.net.proto.EntityAuthorityInfoOuterClass.EntityAuthorityIn
 import emu.grasscutter.net.proto.EntityClientDataOuterClass.EntityClientData;
 import emu.grasscutter.net.proto.EntityRendererChangedInfoOuterClass.EntityRendererChangedInfo;
 import emu.grasscutter.net.proto.EvtCreateGadgetNotifyOuterClass.EvtCreateGadgetNotify;
-import emu.grasscutter.net.proto.GadgetClientParamOuterClass.GadgetClientParam;
 import emu.grasscutter.net.proto.MotionInfoOuterClass.MotionInfo;
 import emu.grasscutter.net.proto.PropPairOuterClass.PropPair;
 import emu.grasscutter.net.proto.ProtEntityTypeOuterClass.ProtEntityType;
@@ -95,7 +93,7 @@ public class EntityClientGadget extends EntityBaseGadget {
 
 	@Override
 	public void onDeath(int killerId) {
-		
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
 	}
 
 	@Override

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

@@ -175,6 +175,8 @@ public class EntityGadget extends EntityBaseGadget {
 
     @Override
     public void onDeath(int killerId) {
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
+
         if (this.getSpawnEntry() != null) {
             this.getScene().getDeadSpawnedEntities().add(getSpawnEntry());
         }

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

@@ -158,6 +158,8 @@ public class EntityMonster extends GameEntity {
 
     @Override
     public void onDeath(int killerId) {
+        super.onDeath(killerId); // Invoke super class's onDeath() method.
+
         if (this.getSpawnEntry() != null) {
             this.getScene().getDeadSpawnedEntities().add(getSpawnEntry());
         }

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

@@ -15,6 +15,7 @@ import emu.grasscutter.net.proto.MotionInfoOuterClass.MotionInfo;
 import emu.grasscutter.net.proto.MotionStateOuterClass.MotionState;
 import emu.grasscutter.net.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 import emu.grasscutter.net.proto.VectorOuterClass.Vector;
+import emu.grasscutter.server.event.entity.EntityDeathEvent;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
 import emu.grasscutter.utils.Position;
 import it.unimi.dsi.fastutil.ints.Int2FloatMap;
@@ -262,7 +263,9 @@ public abstract class GameEntity {
      * @param killerId Entity id of the entity that killed this entity
      */
     public void onDeath(int killerId) {
-
+        // Invoke entity death event.
+        EntityDeathEvent event = new EntityDeathEvent(this, killerId);
+        event.call();
     }
 
     public abstract SceneEntityInfo toProto();

src/main/java/emu/grasscutter/server/event/entity/EntityDeathEvent.java

@@ -0,0 +1,20 @@
+package emu.grasscutter.server.event.entity;
+
+import emu.grasscutter.game.entity.GameEntity;
+import emu.grasscutter.server.event.types.EntityEvent;
+import emu.grasscutter.utils.Location;
+import lombok.Getter;
+
+import javax.annotation.Nullable;
+
+public final class EntityDeathEvent extends EntityEvent {
+    @Getter private final Location deathLocation;
+    @Getter @Nullable private final GameEntity killer;
+
+    public EntityDeathEvent(GameEntity entity, int killerId) {
+        super(entity);
+
+        this.deathLocation = new Location(entity.getScene(), entity.getPosition());
+        this.killer = entity.getScene().getEntityById(killerId);
+    }
+}