Readd last API patch (with TODO)

1 files changed, 36 insertions, 0 deletions

diff --git a/patches/api/0418-Allow-proper-checking-of-empty-item-stacks.patch b/patches/api/0418-Allow-proper-checking-of-empty-item-stacks.patch
new file mode 100644
index 0000000000..0fe58e0369
--- /dev/null
+++ b/patches/api/0418-Allow-proper-checking-of-empty-item-stacks.patch
@@ -0,0 +1,36 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aeltumn <[email protected]>
+Date: Mon, 28 Aug 2023 13:41:09 +0200
+Subject: [PATCH] Allow proper checking of empty item stacks
+
+This adds a method to check if an item stack is empty or not. This mirrors vanilla's implementation of the same method.
+
+diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
+index e39c9167bd66c528c09b256f15cc6c58666f0ca0..773780811a24aa1c1591257a993e30f2d99da436 100644
+--- a/src/main/java/org/bukkit/inventory/ItemStack.java
++++ b/src/main/java/org/bukkit/inventory/ItemStack.java
+@@ -1104,5 +1104,24 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+     public @NotNull ItemStack damage(int amount, @NotNull org.bukkit.entity.LivingEntity livingEntity) {
+         return livingEntity.damageItemStack(this, amount);
+     }
++
++    /**
++     * Returns an empty item stack, consists of an air material and a stack size of 0.
++     *
++     * Any item stack with a material of air or a stack size of 0 is seen
++     * as being empty by {@link ItemStack#isEmpty}.
++     */
++    @NotNull
++    public static ItemStack empty() {
++        return new ItemStack();
++    }
++
++    /**
++     * Returns whether this item stack is empty and contains no item. This means
++     * it is either air or the stack has a size of 0.
++     */
++    public boolean isEmpty() {
++        return type.isAir() || amount <= 0;
++    }
+     // Paper end
+ }