Add XP cost display above 40.

Need ProtocoLib installed.

src/main/kotlin/io/delilaheve/AnvilEventListener.kt

@@ -19,6 +19,7 @@ import org.bukkit.event.EventPriority.HIGHEST
 import org.bukkit.event.Listener
 import org.bukkit.event.inventory.ClickType
 import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.event.inventory.InventoryCloseEvent
 import org.bukkit.event.inventory.PrepareAnvilEvent
 import org.bukkit.inventory.AnvilInventory
 import org.bukkit.inventory.InventoryView.Property.REPAIR_COST
@@ -26,6 +27,7 @@ import org.bukkit.inventory.ItemStack
 import org.bukkit.inventory.meta.Repairable
 import xyz.alexcrea.cuanvil.config.ConfigHolder
 import xyz.alexcrea.cuanvil.group.ConflictType
+import xyz.alexcrea.cuanvil.packet.PacketManager
 import xyz.alexcrea.cuanvil.recipe.AnvilCustomRecipe
 import xyz.alexcrea.cuanvil.util.UnitRepairUtil.getRepair
 import kotlin.math.min
@@ -34,7 +36,7 @@ import kotlin.math.min
 /**
  * Listener for anvil events
  */
-class AnvilEventListener : Listener {
+class AnvilEventListener(private val packetManager: PacketManager) : Listener {
 
     companion object {
         // Anvil's output slot
@@ -544,14 +546,30 @@ class AnvilEventListener : Listener {
 
                 val player = event.view.player
                 if(player is Player){
+                    if(player.gameMode != GameMode.CREATIVE){
+                        packetManager.setInstantBuild(player, finalAnvilCost >= 40)
+                    }
                     player.updateInventory()
+
                 }
             })
     }
 
+    @EventHandler
+    fun onAnvilClose(event: InventoryCloseEvent){
+        val player = event.player
+        if(event.inventory !is AnvilInventory) return
+        if(player is Player && GameMode.CREATIVE != player.gameMode){
+            packetManager.setInstantBuild(player, false)
+        }
+
+    }
+
 }
 
 
+
+
 private class SlotContainer(val type: SlotType, val slot: Int)
 private enum class SlotType {
     CURSOR,

src/main/kotlin/io/delilaheve/CustomAnvil.kt

@@ -8,6 +8,9 @@ import xyz.alexcrea.cuanvil.command.EditConfigExecutor
 import xyz.alexcrea.cuanvil.command.ReloadExecutor
 import xyz.alexcrea.cuanvil.config.ConfigHolder
 import xyz.alexcrea.cuanvil.listener.ChatEventListener
+import xyz.alexcrea.cuanvil.packet.NoProtocoLib
+import xyz.alexcrea.cuanvil.packet.PacketManager
+import xyz.alexcrea.cuanvil.packet.ProtocoLibWrapper
 import xyz.alexcrea.cuanvil.util.Metrics
 import xyz.alexcrea.cuanvil.util.MetricsUtil
 import java.io.File
@@ -66,14 +69,20 @@ class CustomAnvil : JavaPlugin() {
                 instance.logger.info(message)
             }
         }
+
+
     }
 
+    lateinit var packetManager: PacketManager
+
     /**
      * Setup plugin for use
      */
     override fun onEnable() {
         instance = this
 
+        val pluginManager = Bukkit.getPluginManager();
+
         // Disable old plugin name if exist
         val potentialPlugin = Bukkit.getPluginManager().getPlugin("UnsafeEnchantsPlus")
         if (potentialPlugin != null) {
@@ -82,9 +91,15 @@ class CustomAnvil : JavaPlugin() {
             logger.warning("Please note CustomAnvil is a more recent version of UnsafeEnchantsPlus")
         }
 
+        // Load ProtocolLib dependency if exist
+        packetManager = if(pluginManager.isPluginEnabled("ProtocolLib"))
+        { ProtocoLibWrapper(); }
+        else
+        { NoProtocoLib(); }
+
         // Load chat listener
         chatListener = ChatEventListener()
-        Bukkit.getPluginManager().registerEvents(chatListener, this)
+        pluginManager.registerEvents(chatListener, this)
 
         // Load config
         val success = ConfigHolder.loadConfig()
@@ -98,7 +113,7 @@ class CustomAnvil : JavaPlugin() {
         prepareCommand()
 
         server.pluginManager.registerEvents(
-            AnvilEventListener(),
+            AnvilEventListener(packetManager),
             this
         )
     }

src/main/kotlin/xyz/alexcrea/cuanvil/packet/NoProtocoLib.kt

@@ -0,0 +1,13 @@
+package xyz.alexcrea.cuanvil.packet
+
+import org.bukkit.entity.Player
+
+class NoProtocoLib: PacketManager {
+    override val isProtocoLibInstalled: Boolean
+        get() = false
+
+    // ProtocoLib not installed: We do nothing
+
+    override fun setInstantBuild(player: Player, instantBuild: Boolean) {}
+
+}

src/main/kotlin/xyz/alexcrea/cuanvil/packet/PacketManager.kt

@@ -0,0 +1,11 @@
+package xyz.alexcrea.cuanvil.packet
+
+import org.bukkit.entity.Player
+
+interface PacketManager {
+
+    val isProtocoLibInstalled: Boolean
+
+    fun setInstantBuild(player: Player, instantBuild: Boolean)
+
+}

src/main/kotlin/xyz/alexcrea/cuanvil/packet/ProtocoLibWrapper.kt

@@ -0,0 +1,39 @@
+package xyz.alexcrea.cuanvil.packet
+
+import com.comphenix.protocol.PacketType
+import com.comphenix.protocol.ProtocolLibrary
+import com.comphenix.protocol.ProtocolManager
+import com.comphenix.protocol.events.PacketContainer
+import org.bukkit.entity.Player
+import java.lang.reflect.InvocationTargetException
+
+class ProtocoLibWrapper: PacketManager {
+
+    private val protocolManager: ProtocolManager = ProtocolLibrary.getProtocolManager();
+
+    override val isProtocoLibInstalled: Boolean
+        get() = true
+
+    override fun setInstantBuild(player: Player, instantBuild: Boolean) {
+        val packet = PacketContainer(PacketType.Play.Server.ABILITIES)
+
+        // Set player's properties
+        packet.float
+            .write(0, player.flySpeed / 2)
+            .write(1, player.walkSpeed / 2)
+
+        packet.booleans
+            .write(0, player.isInvulnerable)
+            .write(1, player.isFlying)
+            .write(2, player.allowFlight)
+            .write(3, instantBuild)
+
+        // Send packet
+        try {
+            protocolManager.sendServerPacket(player, packet)
+        } catch (e: InvocationTargetException) {
+            e.printStackTrace()
+        }
+    }
+
+}