From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: pkt77 <parkerkt77@gmail.com>
Date: Fri, 10 Nov 2017 23:46:34 -0500
Subject: [PATCH] Add PlayerArmorChangeEvent


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index eafbe6fd829c2067b1e81ea8aad77fe3ba3df82f..2bb22c70c52a98abc0f4839ae67e9d27c320251a 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3137,6 +3137,13 @@ public abstract class LivingEntity extends Entity implements Attackable {
             ItemStack itemstack2 = this.getItemBySlot(enumitemslot);
 
             if (this.equipmentHasChanged(itemstack1, itemstack2)) {
+                // Paper start - PlayerArmorChangeEvent
+                if (this instanceof ServerPlayer && enumitemslot.getType() == EquipmentSlot.Type.ARMOR) {
+                    final org.bukkit.inventory.ItemStack oldItem = CraftItemStack.asBukkitCopy(itemstack1);
+                    final org.bukkit.inventory.ItemStack newItem = CraftItemStack.asBukkitCopy(itemstack2);
+                    new com.destroystokyo.paper.event.player.PlayerArmorChangeEvent((Player) this.getBukkitEntity(), com.destroystokyo.paper.event.player.PlayerArmorChangeEvent.SlotType.valueOf(enumitemslot.name()), oldItem, newItem).callEvent();
+                }
+                // Paper end - PlayerArmorChangeEvent
                 if (map == null) {
                     map = Maps.newEnumMap(EquipmentSlot.class);
                 }
diff --git a/src/test/java/io/papermc/paper/inventory/item/ArmorSlotTypeMaterialTest.java b/src/test/java/io/papermc/paper/inventory/item/ArmorSlotTypeMaterialTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..a706dcbabfe31bf54a552965fa5feb8be34213bf
--- /dev/null
+++ b/src/test/java/io/papermc/paper/inventory/item/ArmorSlotTypeMaterialTest.java
@@ -0,0 +1,74 @@
+package io.papermc.paper.inventory.item;
+
+import com.destroystokyo.paper.event.player.PlayerArmorChangeEvent;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+import net.minecraft.world.entity.EquipmentSlot;
+import net.minecraft.world.item.Equipable;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import org.bukkit.Material;
+import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+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.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class ArmorSlotTypeMaterialTest extends AbstractTestingBase {
+
+    public static Stream<Object[]> slotTypeParams() {
+        final List<Object[]> parameters = new ArrayList<>();
+        for (final PlayerArmorChangeEvent.SlotType slotType : PlayerArmorChangeEvent.SlotType.values()) {
+            for (final Material item : slotType.getTypes()) {
+                parameters.add(new Object[]{ slotType, item });
+            }
+        }
+        return parameters.stream();
+    }
+
+    @ParameterizedTest(name = "{argumentsWithNames}")
+    @MethodSource("slotTypeParams")
+    public void testSlotType(PlayerArmorChangeEvent.SlotType slotType, Material item) {
+        final Item nmsItem = CraftMagicNumbers.getItem(item);
+        final Equipable equipable = Equipable.get(new ItemStack(nmsItem));
+        assertNotNull(equipable, item + " isn't equipable");
+        final EquipmentSlot slot = switch (slotType) {
+            case HEAD -> EquipmentSlot.HEAD;
+            case CHEST -> EquipmentSlot.CHEST;
+            case LEGS -> EquipmentSlot.LEGS;
+            case FEET -> EquipmentSlot.FEET;
+        };
+        assertEquals(equipable.getEquipmentSlot(), slot, item + " isn't set to the right slot");
+    }
+
+    public static Stream<Object[]> equipableParams() {
+        final List<Object[]> parameters = new ArrayList<>();
+        for (final Item item : net.minecraft.core.registries.BuiltInRegistries.ITEM) {
+            final Equipable equipable = Equipable.get(new ItemStack(item));
+            if (equipable != null) {
+                parameters.add(new Object[]{equipable, item});
+            }
+        }
+        return parameters.stream();
+    }
+
+    @ParameterizedTest(name = "{argumentsWithNames}")
+    @MethodSource("equipableParams")
+    public void testEquipable(Equipable equipable, Item item) {
+        final EquipmentSlot equipmentSlot = equipable.getEquipmentSlot();
+        PlayerArmorChangeEvent.SlotType slotType = switch (equipmentSlot) {
+            case HEAD -> PlayerArmorChangeEvent.SlotType.HEAD;
+            case CHEST -> PlayerArmorChangeEvent.SlotType.CHEST;
+            case LEGS -> PlayerArmorChangeEvent.SlotType.LEGS;
+            case FEET -> PlayerArmorChangeEvent.SlotType.FEET;
+            default -> null;
+        };
+        if (slotType != null) {
+            assertTrue(slotType.getTypes().contains(CraftMagicNumbers.getMaterial(item)), "SlotType " + slotType + " doesn't include " + item);
+        }
+    }
+}