Paper/patches/server/0664-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 aa90b0bc1ca3f79a38b39442bf87e376cd2d73ae..48a88dae70fdf2757537d4a90aa60046e6346323 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
@@ -528,4 +528,19 @@ 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 = new net.minecraft.resources.ResourceLocation(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
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
index 8f8b14cb845bf1ba28276b3e3c0d8f8c56106c7d..d7495ea25713e959d106764054ce6642af497035 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -461,6 +461,16 @@ public class Commodore
                             return;
                         }
                         // 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, CB_PACKAGE + "/inventory/CraftItemFactory");
+                            super.visitInsn(Opcodes.SWAP); // moves param back to the the top of stack
+                            super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, CB_PACKAGE + "/inventory/CraftItemFactory", "getSpawnEgg0", desc, false);
+                            return;
+                        }
+                        // Paper end - ItemFactory#getSpawnEgg
                         if ( modern )
                         {
                             if ( owner.equals( "org/bukkit/Material" ) )