Paper/patches/server/0781-Implement-enchantWithLevels-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Wed, 16 Mar 2022 20:35:21 -0700
Subject: [PATCH] Implement enchantWithLevels API


diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
index 259489c7d0f4b5ce3e8f4294f4f853e9b51ded0b..5f6b93be9e81df8fae9a5ab160a232b65ce7b8bc 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
@@ -495,8 +495,7 @@ public final class CraftItemFactory implements ItemFactory {
         }
 
         CraftItemStack craft = (CraftItemStack) itemStack;
-        EnchantmentHelper.enchantItem(source, craft.handle, level, allowTreasures);
-        return craft;
+        return EnchantmentHelper.enchantItem(source, craft.handle, level, allowTreasures).asBukkitCopy(); // Paper - fix broken implementation
     }
 
     // Paper start - Adventure
@@ -585,4 +584,21 @@ public final class CraftItemFactory implements ItemFactory {
         return eggItem == null ? null : new net.minecraft.world.item.ItemStack(eggItem).asBukkitMirror();
     }
     // Paper end
+
+    // Paper start - enchantWithLevels API
+    @Override
+    public ItemStack enchantWithLevels(ItemStack itemStack, int levels, boolean allowTreasure, java.util.Random random) {
+        Preconditions.checkArgument(itemStack != null, "Argument 'itemStack' must not be null");
+        Preconditions.checkArgument(itemStack.getType() != Material.AIR, "Argument 'itemStack' must not be of type AIR");
+        Preconditions.checkArgument(itemStack.getAmount() > 0, "Argument 'itemStack' amount must be greater than 0");
+        Preconditions.checkArgument(levels > 0 && levels <= 30, "Argument 'levels' must be in range [1, 30] (attempted " + levels + ")");
+        Preconditions.checkArgument(random != null, "Argument 'random' must not be null");
+        final net.minecraft.world.item.ItemStack internalStack = CraftItemStack.asNMSCopy(itemStack);
+        if (internalStack.getTag() != null) {
+            internalStack.getTag().remove(net.minecraft.world.item.ItemStack.TAG_ENCH);
+        }
+        final net.minecraft.world.item.ItemStack enchanted = net.minecraft.world.item.enchantment.EnchantmentHelper.enchantItem(new org.bukkit.craftbukkit.util.RandomSourceWrapper(random), internalStack, levels, allowTreasure);
+        return CraftItemStack.asCraftMirror(enchanted);
+    }
+    // Paper end - enchantWithLevels API
 }