From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>
Date: Thu, 31 Aug 2023 17:32:48 +0200
Subject: [PATCH] Fix silent equipment change for mobs


diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index 5da7ffee71bf6d82a53b3c2f99e2bd898d0b1799..a59ee9d9b93404060e7a4702497071859daec6df 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -1047,13 +1047,20 @@ public abstract class Mob extends LivingEntity implements Targeting {
 
     @Override
     public void setItemSlot(EquipmentSlot slot, ItemStack stack) {
+        // Paper start - Fix silent equipment change
+        setItemSlot(slot, stack, false);
+    }
+
+    @Override
+    public void setItemSlot(EquipmentSlot slot, ItemStack stack, boolean silent) {
+        // Paper end - Fix silent equipment change
         this.verifyEquippedItem(stack);
         switch (slot.getType()) {
             case HAND:
-                this.onEquipItem(slot, (ItemStack) this.handItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.handItems.set(slot.getIndex(), stack), stack, silent); // Paper - Fix silent equipment change
                 break;
             case ARMOR:
-                this.onEquipItem(slot, (ItemStack) this.armorItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.armorItems.set(slot.getIndex(), stack), stack, silent); // Paper - Fix silent equipment change
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java b/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
index 40664cc7e3665432a2ab5e552802c3fc3edbdb22..586e3e92ccc275446df6dbbff9bf010a37a9aa8f 100644
--- a/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
+++ b/src/main/java/net/minecraft/world/entity/monster/AbstractSkeleton.java
@@ -250,8 +250,8 @@ public abstract class AbstractSkeleton extends Monster implements RangedAttackMo
     // Paper end - shouldBurnInDay API
 
     @Override
-    public void setItemSlot(EquipmentSlot slot, ItemStack stack) {
-        super.setItemSlot(slot, stack);
+    public void setItemSlot(EquipmentSlot slot, ItemStack stack, boolean silent) { // Paper - Fix silent equipment change
+        super.setItemSlot(slot, stack, silent); // Paper - Fix silent equipment change
         if (!this.level().isClientSide) {
             this.reassessWeaponGoal();
         }
diff --git a/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java b/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..81947843d1f2f7dc6f59d7b52f327d60b17d0dcc
--- /dev/null
+++ b/src/test/java/io/papermc/paper/entity/EntitySetItemSlotSilentOverrideTest.java
@@ -0,0 +1,51 @@
+package io.papermc.paper.entity;
+
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfo;
+import io.github.classgraph.MethodInfo;
+import io.github.classgraph.MethodInfoList;
+import io.github.classgraph.MethodParameterInfo;
+import io.github.classgraph.ScanResult;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class EntitySetItemSlotSilentOverrideTest extends AbstractTestingBase {
+
+    public static Stream<ClassInfo> parameters() {
+        final List<ClassInfo> classInfo = new ArrayList<>();
+        try (ScanResult scanResult = new ClassGraph()
+            .enableClassInfo()
+            .enableMethodInfo()
+            .whitelistPackages("net.minecraft")
+            .scan()
+        ) {
+            for (final ClassInfo subclass : scanResult.getSubclasses("net.minecraft.world.entity.LivingEntity")) {
+                final MethodInfoList setItemSlot = subclass.getDeclaredMethodInfo("setItemSlot");
+                if (!setItemSlot.isEmpty()) {
+                    classInfo.add(subclass);
+                }
+            }
+        }
+        return classInfo.stream();
+    }
+
+    @ParameterizedTest
+    @MethodSource("parameters")
+    public void checkSetItemSlotSilentOverrides(ClassInfo overridesSetItemSlot) {
+        final MethodInfoList setItemSlot = overridesSetItemSlot.getDeclaredMethodInfo("setItemSlot");
+        for (final MethodInfo methodInfo : setItemSlot) {
+            for (final MethodParameterInfo methodParameterInfo : methodInfo.getParameterInfo()) {
+                if ("boolean".equals(methodParameterInfo.getTypeDescriptor().toStringWithSimpleNames())) {
+                    return;
+                }
+            }
+        }
+        fail(overridesSetItemSlot.getName() + " needs to override setItemSlot with the boolean silent parameter as well");
+    }
+}