Add PlayerLevelStatueEvent & PlayerUseSkillEvent

src/main/java/emu/grasscutter/game/ability/AbilityManager.java

@@ -18,12 +18,14 @@ import emu.grasscutter.net.proto.AbilityMetaSetKilledStateOuterClass.AbilityMeta
 import emu.grasscutter.net.proto.AbilityScalarTypeOuterClass.AbilityScalarType;
 import emu.grasscutter.net.proto.AbilityScalarValueEntryOuterClass.AbilityScalarValueEntry;
 import emu.grasscutter.net.proto.ModifierActionOuterClass.ModifierAction;
+import emu.grasscutter.server.event.player.PlayerUseSkillEvent;
 import io.netty.util.concurrent.FastThreadLocalThread;
-import java.util.HashMap;
-import java.util.concurrent.*;
 import lombok.Getter;
 import org.reflections.Reflections;
 
+import java.util.HashMap;
+import java.util.concurrent.*;
+
 public final class AbilityManager extends BasePlayerManager {
     private static final HashMap<AbilityModifierAction.Type, AbilityActionHandler> actionHandlers =
             new HashMap<>();
@@ -263,7 +265,8 @@ public final class AbilityManager extends BasePlayerManager {
         }
 
         // Check if the caster matches the player.
-        if (player.getTeamManager().getCurrentAvatarEntity().getId() != casterId) {
+        var currentAvatar = player.getTeamManager().getCurrentAvatarEntity();
+        if (currentAvatar == null || currentAvatar.getId() != casterId) {
             return;
         }
 
@@ -272,6 +275,11 @@ public final class AbilityManager extends BasePlayerManager {
             return;
         }
 
+        // Invoke PlayerUseSkillEvent.
+        var event = new PlayerUseSkillEvent(player,
+            skillData, currentAvatar.getAvatar());
+        if (!event.call()) return;
+
         // Check if the skill is an elemental burst.
         if (skillData.getCostElemVal() <= 0) {
             return;

src/main/java/emu/grasscutter/game/managers/SotSManager.java

@@ -15,6 +15,7 @@ import emu.grasscutter.game.props.PlayerProperty;
 import emu.grasscutter.game.quest.enums.QuestContent;
 import emu.grasscutter.net.proto.ChangeHpReasonOuterClass.ChangeHpReason;
 import emu.grasscutter.net.proto.PropChangeReasonOuterClass.PropChangeReason;
+import emu.grasscutter.server.event.player.PlayerLevelStatueEvent;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropChangeReasonNotify;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
 import emu.grasscutter.server.packet.send.PacketLevelupCityRsp;
@@ -303,5 +304,8 @@ public class SotSManager extends BasePlayerManager {
         player.sendPacket(
                 new PacketLevelupCityRsp(
                         sceneId, cityInfo.getLevel(), cityId, cityInfo.getNumCrystal(), areaId, 0));
+
+        // Call PlayerLevelStatueEvent.
+        new PlayerLevelStatueEvent(this.getPlayer(), cityInfo, sceneId, areaId);
     }
 }

src/main/java/emu/grasscutter/server/event/player/PlayerLevelStatueEvent.java

@@ -0,0 +1,20 @@
+package emu.grasscutter.server.event.player;
+
+import emu.grasscutter.game.city.CityInfoData;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.server.event.types.PlayerEvent;
+import lombok.Getter;
+
+@Getter
+public final class PlayerLevelStatueEvent extends PlayerEvent {
+    private final CityInfoData city;
+    private final int sceneId, areaId;
+
+    public PlayerLevelStatueEvent(Player player, CityInfoData city, int sceneId, int areaId) {
+        super(player);
+
+        this.city = city;
+        this.sceneId = sceneId;
+        this.areaId = areaId;
+    }
+}

src/main/java/emu/grasscutter/server/event/player/PlayerUseSkillEvent.java

@@ -0,0 +1,28 @@
+package emu.grasscutter.server.event.player;
+
+import emu.grasscutter.data.excels.avatar.AvatarSkillData;
+import emu.grasscutter.game.avatar.Avatar;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.server.event.Cancellable;
+import emu.grasscutter.server.event.types.PlayerEvent;
+import lombok.Getter;
+
+@Getter
+public final class PlayerUseSkillEvent extends PlayerEvent implements Cancellable {
+    private final AvatarSkillData skillData;
+    private final Avatar avatar;
+
+    public PlayerUseSkillEvent(Player player, AvatarSkillData skillData, Avatar avatar) {
+        super(player);
+
+        this.skillData = skillData;
+        this.avatar = avatar;
+    }
+
+    /**
+     * @return {@code true} if the skill is an elemental burst.
+     */
+    public boolean isElementalBurst() {
+        return this.getSkillData().getCostElemVal() <= 0;
+    }
+}