Purpur/patches/server/0269-Add-an-option-to-fix-MC-3304-projectile-looting.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MelnCat <melncatuwu@gmail.com>
Date: Sat, 1 Oct 2022 11:33:15 -0700
Subject: [PATCH] Add an option to fix MC-3304 (projectile looting)


diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
index 2ace900721f4aa185b8ed28ac95feb50cb89453f..1dd61ee306231f77664dee7e4f2b617fe2e3659f 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
@@ -80,6 +80,7 @@ public abstract class AbstractArrow extends Projectile {
     public ItemStack pickupItemStack;
     @Nullable
     public ItemStack firedFromWeapon;
+    public net.minecraft.world.item.enchantment.ItemEnchantments actualEnchantments = net.minecraft.world.item.enchantment.ItemEnchantments.EMPTY; // Purpur - Add an option to fix MC-3304 projectile looting
 
     // Spigot Start
     @Override
@@ -589,6 +590,12 @@ public abstract class AbstractArrow extends Projectile {
         return this.firedFromWeapon;
     }
 
+    // Purpur start - Add an option to fix MC-3304 projectile looting
+    public void setActualEnchantments(net.minecraft.world.item.enchantment.ItemEnchantments actualEnchantments) {
+        this.actualEnchantments = actualEnchantments;
+    }
+    // Purpur end - Add an option to fix MC-3304 projectile looting
+
     protected SoundEvent getDefaultHitGroundSoundEvent() {
         return SoundEvents.ARROW_HIT;
     }
diff --git a/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java b/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
index 32dd0b13a0819f597d8a93c6bc3a155781067544..9751eea2d8aa3a45da34f09377d2fc81fe9a90d8 100644
--- a/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
+++ b/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
@@ -110,6 +110,8 @@ public abstract class ProjectileWeaponItem extends Item {
             entityarrow.setCritArrow(true);
         }
 
+        entityarrow.setActualEnchantments(weaponStack.getEnchantments()); // Purpur - Add an option to fix MC-3304 projectile looting
+
         return entityarrow;
     }
 
diff --git a/src/main/java/net/minecraft/world/item/TridentItem.java b/src/main/java/net/minecraft/world/item/TridentItem.java
index 1be074074283f12543ac771ac9201580e7736289..8cf0b69fee110af05b89afa8e3236575aa6850e2 100644
--- a/src/main/java/net/minecraft/world/item/TridentItem.java
+++ b/src/main/java/net/minecraft/world/item/TridentItem.java
@@ -86,6 +86,8 @@ public class TridentItem extends Item implements ProjectileItem {
                                     entitythrowntrident.pickup = AbstractArrow.Pickup.CREATIVE_ONLY;
                                 }
 
+                                entitythrowntrident.setActualEnchantments(stack.getEnchantments()); // Purpur - Add an option to fix MC-3304 projectile looting
+
                                 // CraftBukkit start
                                 // Paper start - PlayerLaunchProjectileEvent
                                 com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(stack), (org.bukkit.entity.Projectile) entitythrowntrident.getBukkitEntity());
diff --git a/src/main/java/net/minecraft/world/level/storage/loot/functions/EnchantedCountIncreaseFunction.java b/src/main/java/net/minecraft/world/level/storage/loot/functions/EnchantedCountIncreaseFunction.java
index d86189bd446c7cd7215cfbcef72b2125a064e3d1..53608b9dbb81c58819b9ae6bc676ffb3ed01ce70 100644
--- a/src/main/java/net/minecraft/world/level/storage/loot/functions/EnchantedCountIncreaseFunction.java
+++ b/src/main/java/net/minecraft/world/level/storage/loot/functions/EnchantedCountIncreaseFunction.java
@@ -66,6 +66,11 @@ public class EnchantedCountIncreaseFunction extends LootItemConditionalFunction
         Entity entity = context.getParamOrNull(LootContextParams.ATTACKING_ENTITY);
         if (entity instanceof LivingEntity livingEntity) {
             int i = EnchantmentHelper.getEnchantmentLevel(this.enchantment, livingEntity);
+            // Purpur start - Add an option to fix MC-3304 projectile looting
+            if (org.purpurmc.purpur.PurpurConfig.fixProjectileLootingTransfer && context.getParamOrNull(LootContextParams.DIRECT_ATTACKING_ENTITY) instanceof net.minecraft.world.entity.projectile.AbstractArrow arrow) {
+                i = arrow.actualEnchantments.getLevel(this.enchantment);
+            }
+            // Purpur end - Add an option to fix MC-3304 projectile looting
             if (i == 0) {
                 return stack;
             }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index d6b99dd0fffaf3247ddfc5dd23dffdc2fb4e7897..9a60abb073d9512cb85b1ea1ae542d07e594300e 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -503,6 +503,11 @@ public class PurpurConfig {
         usernameValidCharactersPattern = java.util.regex.Pattern.compile(setPattern == null || setPattern.isBlank() ? defaultPattern : setPattern);
     }
 
+    public static boolean fixProjectileLootingTransfer = false;
+    private static void fixProjectileLootingTransfer() {
+        fixProjectileLootingTransfer = getBoolean("settings.fix-projectile-looting-transfer", fixProjectileLootingTransfer);
+    }
+
     private static void blastResistanceSettings() {
         getMap("settings.blast-resistance-overrides", Collections.emptyMap()).forEach((blockId, value) -> {
             Block block = BuiltInRegistries.BLOCK.get(ResourceLocation.parse(blockId));