From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Wed, 16 Mar 2022 20:35:13 -0700
Subject: [PATCH] Add enchantWithLevels API

Deprecate upstream's newer and poorly implemented similar
API.

diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
index dbebaf8172ec6872f56958b9583affde4f8400a4..98a970a6582dca22e719a31559c7becea4725cb2 100644
--- a/src/main/java/org/bukkit/inventory/ItemFactory.java
+++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
@@ -185,8 +185,11 @@ public interface ItemFactory {
      * @param level the level to use, which is the level in the enchantment table
      * @param allowTreasures allows treasure enchants, e.g. mending, if true.
      * @return a new ItemStack containing the result of the Enchantment
+     * @deprecated use {@link #enchantWithLevels(ItemStack, int, boolean, java.util.Random)}. This method's implementation is poorly
+     * designed and was originally broken.
      */
     @NotNull
+    @Deprecated // Paper
     ItemStack enchantItem(@NotNull final Entity entity, @NotNull final ItemStack item, final int level, final boolean allowTreasures);
 
     /**
@@ -199,8 +202,11 @@ public interface ItemFactory {
      * @param level the level to use, which is the level in the enchantment table
      * @param allowTreasures allow the treasure enchants, e.g. mending, if true.
      * @return a new ItemStack containing the result of the Enchantment
+     * @deprecated use {@link #enchantWithLevels(ItemStack, int, boolean, java.util.Random)}. This method's implementation is poorly
+     * designed and was originally broken.
      */
     @NotNull
+    @Deprecated // Paper
     ItemStack enchantItem(@NotNull final World world, @NotNull final ItemStack item, final int level, final boolean allowTreasures);
 
     /**
@@ -212,8 +218,11 @@ public interface ItemFactory {
      * @param level the level to use, which is the level in the enchantment table
      * @param allowTreasures allow treasure enchantments, e.g. mending, if true.
      * @return a new ItemStack containing the result of the Enchantment
+     * @deprecated use {@link #enchantWithLevels(ItemStack, int, boolean, java.util.Random)}. This method's implementation is poorly
+     * designed and was originally broken.
      */
     @NotNull
+    @Deprecated // Paper
     ItemStack enchantItem(@NotNull final ItemStack item, final int level, final boolean allowTreasures);
 
     // Paper start - Adventure
@@ -326,4 +335,22 @@ public interface ItemFactory {
     @Deprecated
     net.md_5.bungee.api.chat.hover.content.Content hoverContentOf(@NotNull org.bukkit.entity.Entity entity, @NotNull net.md_5.bungee.api.chat.BaseComponent[] customName);
     // Paper end - bungee hover events
+
+    // Paper start - enchantWithLevels API
+    /**
+     * Randomly enchants a copy of the provided {@link ItemStack} using the given experience levels.
+     *
+     * <p>If the provided ItemStack is already enchanted, the existing enchants will be removed before enchanting.</p>
+     *
+     * <p>Levels must be in range {@code [1, 30]}.</p>
+     *
+     * @param itemStack ItemStack to enchant
+     * @param levels levels to use for enchanting
+     * @param allowTreasure whether to allow enchantments where {@link org.bukkit.enchantments.Enchantment#isTreasure()} returns true
+     * @param random {@link java.util.Random} instance to use for enchanting
+     * @return enchanted copy of the provided ItemStack
+     * @throws IllegalArgumentException on bad arguments
+     */
+    @NotNull ItemStack enchantWithLevels(@NotNull ItemStack itemStack, @org.jetbrains.annotations.Range(from = 1, to = 30) int levels, boolean allowTreasure, @NotNull java.util.Random random);
+    // Paper end - enchantWithLevels API
 }
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index 351f5c0feec38377fccf09bfc1cef2df88fc2dcd..7eb4cf0b2f162d650252d81e9d38393f69a69046 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -670,6 +670,24 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
     }
 
     // Paper start
+    /**
+     * Randomly enchants a copy of this {@link ItemStack} using the given experience levels.
+     *
+     * <p>If this ItemStack is already enchanted, the existing enchants will be removed before enchanting.</p>
+     *
+     * <p>Levels must be in range {@code [1, 30]}.</p>
+     *
+     * @param levels levels to use for enchanting
+     * @param allowTreasure whether to allow enchantments where {@link org.bukkit.enchantments.Enchantment#isTreasure()} returns true
+     * @param random {@link java.util.Random} instance to use for enchanting
+     * @return enchanted copy of the provided ItemStack
+     * @throws IllegalArgumentException on bad arguments
+     */
+    @NotNull
+    public ItemStack enchantWithLevels(final @org.jetbrains.annotations.Range(from = 1, to = 30) int levels, final boolean allowTreasure, final @NotNull java.util.Random random) {
+        return Bukkit.getServer().getItemFactory().enchantWithLevels(this, levels, allowTreasure, random);
+    }
+
     @NotNull
     @Override
     public net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op) {