From 9fc02034567931a279a6f863d81c9381a216929a Mon Sep 17 00:00:00 2001
From: alexcrea <contact@alexcrea.xyz>
Date: Thu, 16 Jul 2026 19:09:16 +0200
Subject: [PATCH] check isAir instead of null

---
 src/main/kotlin/io/delilaheve/util/ItemUtil.kt               | 4 ++--
 .../xyz/alexcrea/cuanvil/listener/AnvilResultListener.kt     | 5 +++--
 src/main/kotlin/xyz/alexcrea/cuanvil/util/MaterialUtil.kt    | 1 -
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main/kotlin/io/delilaheve/util/ItemUtil.kt b/src/main/kotlin/io/delilaheve/util/ItemUtil.kt
index 5bac8f0e..dba79b28 100644
--- a/src/main/kotlin/io/delilaheve/util/ItemUtil.kt
+++ b/src/main/kotlin/io/delilaheve/util/ItemUtil.kt
@@ -75,6 +75,6 @@ object ItemUtil {
      * The two items should either be the same type, or, the [other] is a book
      */
     fun ItemStack.canMergeWith(
-        other: ItemStack?
-    ) = (other != null) && (customType == other.customType || (other.isEnchantedBook()))
+        other: ItemStack
+    ) = customType == other.customType || (other.isEnchantedBook())
 }
diff --git a/src/main/kotlin/xyz/alexcrea/cuanvil/listener/AnvilResultListener.kt b/src/main/kotlin/xyz/alexcrea/cuanvil/listener/AnvilResultListener.kt
index dd35ed69..7ab1037f 100644
--- a/src/main/kotlin/xyz/alexcrea/cuanvil/listener/AnvilResultListener.kt
+++ b/src/main/kotlin/xyz/alexcrea/cuanvil/listener/AnvilResultListener.kt
@@ -31,6 +31,7 @@ import xyz.alexcrea.cuanvil.listener.PrepareAnvilListener.Companion.ANVIL_INPUT_
 import xyz.alexcrea.cuanvil.listener.PrepareAnvilListener.Companion.ANVIL_INPUT_RIGHT
 import xyz.alexcrea.cuanvil.listener.PrepareAnvilListener.Companion.ANVIL_OUTPUT_SLOT
 import xyz.alexcrea.cuanvil.util.CustomRecipeUtil
+import xyz.alexcrea.cuanvil.util.MaterialUtil.isAir
 import xyz.alexcrea.cuanvil.util.MiniMessageUtil
 import xyz.alexcrea.cuanvil.util.anvil.AnvilLoreEditUtil
 import xyz.alexcrea.cuanvil.util.anvil.AnvilXpUtil
@@ -92,7 +93,7 @@ class AnvilResultListener : Listener {
         }
 
         // Rename
-        if (rightItem == null) {
+        if (rightItem.isAir) {
             val result = AnvilMergeLogic.doRenaming(view, inventory, player, leftItem)
             if (result.isEmpty()) return
 
@@ -106,7 +107,7 @@ class AnvilResultListener : Listener {
         }
 
         // Merge
-        val canMerge = leftItem.canMergeWith(rightItem)
+        val canMerge = leftItem.canMergeWith(rightItem!!)
         if (canMerge) {
             val result = AnvilMergeLogic.doMerge(view, inventory, player, leftItem, rightItem)
 
diff --git a/src/main/kotlin/xyz/alexcrea/cuanvil/util/MaterialUtil.kt b/src/main/kotlin/xyz/alexcrea/cuanvil/util/MaterialUtil.kt
index dc1e25a9..af5020c7 100644
--- a/src/main/kotlin/xyz/alexcrea/cuanvil/util/MaterialUtil.kt
+++ b/src/main/kotlin/xyz/alexcrea/cuanvil/util/MaterialUtil.kt
@@ -1,6 +1,5 @@
 package xyz.alexcrea.cuanvil.util
 
-import org.bukkit.Bukkit
 import org.bukkit.Material
 import org.bukkit.NamespacedKey
 import org.bukkit.inventory.ItemStack