From 76b27df622f297cab0406fb4059c06f20afd91a2 Mon Sep 17 00:00:00 2001
From: KingRainbow44 <kobedo11@gmail.com>
Date: Sun, 27 Aug 2023 23:26:51 -0400
Subject: [PATCH] Add `PlayerLevelItemEvent`

---
 .../game/systems/InventorySystem.java         |  3 +++
 .../event/player/PlayerLevelItemEvent.java    | 26 +++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 src/main/java/emu/grasscutter/server/event/player/PlayerLevelItemEvent.java

diff --git a/src/main/java/emu/grasscutter/game/systems/InventorySystem.java b/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
index 4cb875b8c..04f990d82 100644
--- a/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
+++ b/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
@@ -441,6 +441,9 @@ public class InventorySystem extends BaseGameSystem {
         // Packets
         player.sendPacket(new PacketStoreItemChangeNotify(weapon));
         player.sendPacket(new PacketWeaponUpgradeRsp(weapon, oldLevel, leftovers));
+
+        // Call PlayerLevelItemEvent.
+        new PlayerLevelItemEvent(player, oldLevel, weapon);
     }
 
     private List<ItemParam> getLeftoverOres(int leftover) {
diff --git a/src/main/java/emu/grasscutter/server/event/player/PlayerLevelItemEvent.java b/src/main/java/emu/grasscutter/server/event/player/PlayerLevelItemEvent.java
new file mode 100644
index 000000000..ad4939291
--- /dev/null
+++ b/src/main/java/emu/grasscutter/server/event/player/PlayerLevelItemEvent.java
@@ -0,0 +1,26 @@
+package emu.grasscutter.server.event.player;
+
+import emu.grasscutter.game.inventory.GameItem;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.server.event.types.PlayerEvent;
+import lombok.Getter;
+
+@Getter
+public final class PlayerLevelItemEvent extends PlayerEvent {
+    private final int oldLevel;
+    private final GameItem item;
+
+    public PlayerLevelItemEvent(Player player, int oldLevel, GameItem item) {
+        super(player);
+
+        this.oldLevel = oldLevel;
+        this.item = item;
+    }
+
+    /**
+     * @return The item's new level.
+     */
+    public int getNewLevel() {
+        return this.getItem().getLevel();
+    }
+}