Paper/patches/server/0591-Add-ItemFactory-getSpawnEgg-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Thu, 14 Oct 2021 12:09:39 -0500
Subject: [PATCH] Add ItemFactory#getSpawnEgg API


diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
index eabb8b42b890224dd19b879ff276e9908674310d..803a19063c03627dbea79cb1c395ae35aaef2834 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
@@ -9,6 +9,7 @@ import net.minecraft.core.HolderSet;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.core.component.DataComponentPatch;
 import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.tags.EnchantmentTags;
 import net.minecraft.util.RandomSource;
@@ -286,4 +287,19 @@ public final class CraftItemFactory implements ItemFactory {
             new net.md_5.bungee.api.chat.TextComponent(customName));
     }
     // Paper end - bungee hover events
+
+    // Paper start - old getSpawnEgg API
+    // @Override // used to override, upstream added conflicting method, is called via Commodore now
+    @Deprecated
+    public ItemStack getSpawnEgg0(org.bukkit.entity.EntityType type) {
+        if (type == null) {
+            return null;
+        }
+        String typeId = type.getKey().toString();
+        net.minecraft.resources.ResourceLocation typeKey = ResourceLocation.parse(typeId);
+        net.minecraft.world.entity.EntityType<?> nmsType = net.minecraft.core.registries.BuiltInRegistries.ENTITY_TYPE.get(typeKey);
+        net.minecraft.world.item.SpawnEggItem eggItem = net.minecraft.world.item.SpawnEggItem.byId(nmsType);
+        return eggItem == null ? null : new net.minecraft.world.item.ItemStack(eggItem).asBukkitMirror();
+    }
+    // Paper end - old getSpawnEgg API
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
index 376520f5136dca50a3f35a42bd1f19091df36dfd..0103dcc3f34e07c540e7db0f9bf32c358ccef8f2 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -440,6 +440,15 @@ public class Commodore {
                         }
                         // Paper end
 
+                        // Paper start - ItemFactory#getSpawnEgg (paper had original method that returned ItemStack, upstream added identical but returned Material)
+                        if (owner.equals("org/bukkit/inventory/ItemFactory") && name.equals("getSpawnEgg") && desc.equals("(Lorg/bukkit/entity/EntityType;)Lorg/bukkit/inventory/ItemStack;")) {
+                            super.visitInsn(Opcodes.SWAP); // has 1 param, this moves the owner instance to the top for the checkcast
+                            super.visitTypeInsn(Opcodes.CHECKCAST, runtimeCbPkgPrefix() + "inventory/CraftItemFactory");
+                            super.visitInsn(Opcodes.SWAP); // moves param back to the the top of stack
+                            super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, runtimeCbPkgPrefix() + "inventory/CraftItemFactory", "getSpawnEgg0", desc, false);
+                            return;
+                        }
+                        // Paper end - ItemFactory#getSpawnEgg
                         if (modern) {
                             if (owner.equals("org/bukkit/Material") || (instantiatedMethodType != null && instantiatedMethodType.getDescriptor().startsWith("(Lorg/bukkit/Material;)"))) {
                                 switch (name) {