Add ItemFactory#getMonsterEgg API (#6772)

build-data/paper.at

@@ -250,3 +250,6 @@ public net.minecraft.world.level.block.entity.BlockEntityType validBlocks
 
 # Default entity attributes
 public net.minecraft.world.entity.ai.attributes.AttributeSupplier instances
+
+# Add ItemFactory#getMonsterEgg API
+public net.minecraft.world.item.SpawnEggItem BY_ID

patches/api/0341-Add-ItemFactory-getMonsterEgg-API.patch

@@ -0,0 +1,25 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Thu, 14 Oct 2021 12:09:28 -0500
+Subject: [PATCH] Add ItemFactory#getMonsterEgg API
+
+
+diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
+index 0a4466c6ca519c3a5da76ff870fb2a4e3a06effd..d87ec9754f8327ad163c91f0941e195cc970c1ed 100644
+--- a/src/main/java/org/bukkit/inventory/ItemFactory.java
++++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
+@@ -241,5 +241,14 @@ public interface ItemFactory {
+     @NotNull
+     @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);
++
++    /**
++     * Get a monster egg ItemStack from an EntityType
++     *
++     * @param type EntityType
++     * @return ItemStack spawner egg
++     */
++    @Nullable
++    ItemStack getMonsterEgg(@Nullable org.bukkit.entity.EntityType type);
+     // Paper end
+ }

patches/server/0831-Add-ItemFactory-getMonsterEgg-API.patch

@@ -0,0 +1,28 @@
+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#getMonsterEgg API
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+index aa7fd5c80712fecca1110341a234f60e8607b809..1e80d3e6778850e859e2f9c0c2fecb0d6ff1a8bb 100644
+--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
++++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+@@ -409,5 +409,17 @@ public final class CraftItemFactory implements ItemFactory {
+             entity.getUniqueId().toString(),
+             new net.md_5.bungee.api.chat.TextComponent(customName));
+     }
++
++    @Override
++    public ItemStack getMonsterEgg(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.Registry.ENTITY_TYPE.get(typeKey);
++        net.minecraft.world.item.SpawnEggItem eggItem = net.minecraft.world.item.SpawnEggItem.BY_ID.get(nmsType);
++        return eggItem == null ? null : new net.minecraft.world.item.ItemStack(eggItem).asBukkitMirror();
++    }
+     // Paper end
+ }