Purpur/patches/server/0261-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 75d65b795a7802c0c5b5bd4a6ed429209f987452..f91519f73e766cf891351a95d76abb416da2f957 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
@@ -623,6 +624,12 @@ 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 78ba170a83f8c026bd110eae494c52577182ed61..c2ae50872cead7202246b9cce4db6e0a81e1cf5f 100644
--- a/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
+++ b/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
@@ -105,6 +105,8 @@ 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 4e863ae1f94291b391a142e04e0c41e83417ab70..d7eb680b977656556a618431b1511c1050f6db5e 100644
--- a/src/main/java/net/minecraft/world/item/TridentItem.java
+++ b/src/main/java/net/minecraft/world/item/TridentItem.java
@@ -100,6 +100,9 @@ public class TridentItem extends Item implements ProjectileItem {
                                 return false;
                             }
                             ThrownTrident entitythrowntrident = tridentDelayed.projectile(); // Paper - PlayerLaunchProjectileEvent
+
+                            entitythrowntrident.setActualEnchantments(stack.getEnchantments()); // Purpur - Add an option to fix MC-3304 projectile looting
+
                             if (event.shouldConsume()) stack.hurtWithoutBreaking(1, entityhuman); // Paper - PlayerLaunchProjectileEvent
                             entitythrowntrident.pickupItemStack = stack.copy(); // SPIGOT-4511 update since damage call moved
                             // CraftBukkit end
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 5f27e1ce23f2ed68e4c8af1986fafce940dbf826..d8cf49cbd82ed12d23fa10a81a88cc4bcf1c0f10 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.getOptionalParameter(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.getOptionalParameter(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 4e47c24adb808feee415ee3e1c159955a7be5c71..b5724a0646f2194591d0c8539b87a850ad1bb5db 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -502,6 +502,11 @@ 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.getValue(ResourceLocation.parse(blockId));