fix: nocost

Author: InvalidJoker

src/main/kotlin/cc/modlabs/kpaper/inventory/AnvilGUI.kt

@@ -8,6 +8,7 @@ import org.bukkit.entity.Player
 import org.bukkit.event.inventory.InventoryClickEvent
 import org.bukkit.event.inventory.InventoryType
 import org.bukkit.inventory.Inventory
+import org.bukkit.inventory.InventoryView
 import org.bukkit.inventory.ItemStack
 
 /**
@@ -34,6 +35,7 @@ data class SlotConfig(
 
 class AnvilGUI {
     var title: String = "Anvil"
+    var noCost: Boolean = false
     val slotConfigs: MutableMap<AnvilSlot, SlotConfig> = mutableMapOf()
     var onComplete: ((player: Player, input: Component?) -> Unit)? = null
     var onClose: ((player: Player) -> Unit)? = null
@@ -54,12 +56,32 @@ class SlotBuilder {
     var consumeItem: Boolean = true
 }
 
-fun Player.openAnvilGUI(builder: AnvilGUI.() -> Unit) {
+fun Player.openAnvilGUI(builder: AnvilGUI.() -> Unit): InventoryView? {
     val gui = AnvilGUI().apply(builder)
     val inv: Inventory = Bukkit.createInventory(null, InventoryType.ANVIL, text(gui.title))
     gui.slotConfigs.forEach { (slot, config) ->
         config.item?.let { inv.setItem(slot.index, it) }
     }
     AnvilListener.registerGUI(this, inv, gui)
-    this.openInventory(inv)
+    val view = this.openInventory(inv)
+
+    if (gui.noCost) {
+        try {
+            val holder = view?.topInventory?.holder
+            val containerField = holder?.javaClass?.getDeclaredField("container")
+            if (containerField != null) {
+                containerField.isAccessible = true
+            }
+            val container = containerField?.get(holder)
+            val repairCostField = container?.javaClass?.getDeclaredField("repairCost")
+            if (repairCostField != null) {
+                repairCostField.isAccessible = true
+            }
+            repairCostField?.setInt(container, 0)
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+    return view
 }

src/main/kotlin/cc/modlabs/kpaper/inventory/_internal/AnvilListener.kt

@@ -39,7 +39,7 @@ object AnvilListener : Listener {
             if (clickedSlot == AnvilSlot.OUTPUT && slotConfig?.onClick == null) {
                 val clickedItem = event.currentItem
                 // Typically the "renamed" text is taken from the item's display name
-                val inputText = clickedItem?.itemMeta?.displayName()
+                val inputText = clickedItem?.displayName()
                 gui.onComplete?.invoke(player, inputText)
                 player.closeInventory()
                 unregisterGUI(event.inventory)