Paper/patches/server/0647-Added-EntityDamageItemEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 22 Dec 2020 13:52:48 -0800
Subject: [PATCH] Added EntityDamageItemEvent


diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index a9707ecebb175663acb0f7285c759d938c5dae8b..9eb6ad597a0e2605eae367038d7541fe538f9a86 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -601,7 +601,7 @@ public final class ItemStack {
         return this.getItem().getMaxDamage();
     }
 
-    public boolean hurt(int amount, RandomSource random, @Nullable ServerPlayer player) {
+    public boolean hurt(int amount, RandomSource random, @Nullable LivingEntity player) { // Paper - allow any living entity instead of only ServerPlayers
         if (!this.isDamageableItem()) {
             return false;
         } else {
@@ -619,8 +619,8 @@ public final class ItemStack {
 
                 amount -= k;
                 // CraftBukkit start
-                if (player != null) {
-                    PlayerItemDamageEvent event = new PlayerItemDamageEvent(player.getBukkitEntity(), CraftItemStack.asCraftMirror(this), amount);
+                if (player instanceof ServerPlayer serverPlayer) { // Paper
+                    PlayerItemDamageEvent event = new PlayerItemDamageEvent(serverPlayer.getBukkitEntity(), CraftItemStack.asCraftMirror(this), amount); // Paper
                     event.getPlayer().getServer().getPluginManager().callEvent(event);
 
                     if (amount != event.getDamage() || event.isCancelled()) {
@@ -631,6 +631,14 @@ public final class ItemStack {
                     }
 
                     amount = event.getDamage();
+                    // Paper start - EntityDamageItemEvent
+                } else if (player != null) {
+                    io.papermc.paper.event.entity.EntityDamageItemEvent event = new io.papermc.paper.event.entity.EntityDamageItemEvent(player.getBukkitLivingEntity(), CraftItemStack.asCraftMirror(this), amount);
+                    if (!event.callEvent()) {
+                        return false;
+                    }
+                    amount = event.getDamage();
+                    // Paper end
                 }
                 // CraftBukkit end
                 if (amount <= 0) {
@@ -638,8 +646,8 @@ public final class ItemStack {
                 }
             }
 
-            if (player != null && amount != 0) {
-                CriteriaTriggers.ITEM_DURABILITY_CHANGED.trigger(player, this, this.getDamageValue() + amount);
+            if (player instanceof ServerPlayer serverPlayer && amount != 0) { // Paper
+                CriteriaTriggers.ITEM_DURABILITY_CHANGED.trigger(serverPlayer, this, this.getDamageValue() + amount); // Paper
             }
 
             j = this.getDamageValue() + amount;
@@ -651,7 +659,7 @@ public final class ItemStack {
     public <T extends LivingEntity> void hurtAndBreak(int amount, T entity, Consumer<T> breakCallback) {
         if (!entity.level().isClientSide && (!(entity instanceof net.minecraft.world.entity.player.Player) || !((net.minecraft.world.entity.player.Player) entity).getAbilities().instabuild)) {
             if (this.isDamageableItem()) {
-                if (this.hurt(amount, entity.getRandom(), entity instanceof ServerPlayer ? (ServerPlayer) entity : null)) {
+                if (this.hurt(amount, entity.getRandom(), entity /*instanceof ServerPlayer ? (ServerPlayer) entity : null*/)) { // Paper - pass LivingEntity for EntityItemDamageEvent
                     breakCallback.accept(entity);
                     Item item = this.getItem();
                     // CraftBukkit start - Check for item breaking