Add create conflict item.

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

@@ -7,14 +7,14 @@ import org.bukkit.plugin.java.JavaPlugin
 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.util.Metrics
 import xyz.alexcrea.cuanvil.util.MetricsUtil
 import java.io.File
 import java.io.FileReader
 
 /**
- * Bukkit/Spigot/Paper plugin to alter enchantment max
- * levels and allow unsafe enchantment combinations
+ * Bukkit/Spigot/Paper plugin to alter anvil feature
  */
 class CustomAnvil : JavaPlugin() {
 
@@ -41,6 +41,9 @@ class CustomAnvil : JavaPlugin() {
         // Current plugin instance
         lateinit var instance: CustomAnvil
 
+        // Chat message listener
+        lateinit var chatListener: ChatEventListener
+
         /**
          * Logging handler
          */
@@ -74,8 +77,11 @@ class CustomAnvil : JavaPlugin() {
             logger.warning("Please note CustomAnvil is a more recent version of UnsafeEnchantsPlus")
         }
 
-        // Load config
+        // Load chat listener
+        chatListener = ChatEventListener()
+        Bukkit.getPluginManager().registerEvents(chatListener, this)
 
+        // Load config
         val success = ConfigHolder.loadConfig()
         if(!success) return
 

src/main/kotlin/xyz/alexcrea/cuanvil/command/ReloadExecutor.kt

@@ -41,6 +41,7 @@ class ReloadExecutor : CommandExecutor {
             BasicConfigGui.INSTANCE.updateGuiValues()
             EnchantCostConfigGui.INSTANCE.updateGuiValues()
             EnchantLimitConfigGui.INSTANCE.updateGuiValues()
+            EnchantCostConfigGui.INSTANCE.updateGuiValues()
 
             // & update metric
             MetricsUtil.testIfConfigIsDefault()

src/main/kotlin/xyz/alexcrea/cuanvil/group/EnchantConflictManager.kt

@@ -18,8 +18,6 @@ class EnchantConflictManager {
         // Path for a flag: if the enchantment will be used in the last supported version
         // TODO maybe replace this system by a list of "future" enchantment.
         private const val FUTURE_USE_PATH = "useInFuture"
-        // Default name for an empty Material group
-        private val DEFAULT_EMPTY_GROUP = IncludeGroup("empty")
         // Default name for a joining group
         private const val DEFAULT_GROUP_NAME = "joinedGroup"
     }
@@ -106,17 +104,11 @@ class EnchantConflictManager {
         }
         // Find or create the selected group for the conflict
         val groupList = section.getStringList(CONFLICT_GROUP_PATH)
-        val finalGroup: AbstractMaterialGroup
-        if(groupList.size < 1){
-            finalGroup = DEFAULT_EMPTY_GROUP
-        }else if(groupList.size == 1){
-            finalGroup = findGroup(groupList[0], itemManager, conflictName)
-        }else{
-            finalGroup = IncludeGroup(DEFAULT_GROUP_NAME)
-            for (groupName in groupList) {
-                finalGroup.addToPolicy(findGroup(groupName, itemManager, conflictName))
-            }
+        val finalGroup = IncludeGroup(DEFAULT_GROUP_NAME)
+        for (groupName in groupList) {
+            finalGroup.addToPolicy(findGroup(groupName, itemManager, conflictName))
         }
+
         // Return conflict
         return EnchantConflictGroup(conflictName, finalGroup, minBeforeBlock)
     }
@@ -125,7 +117,7 @@ class EnchantConflictManager {
         val group = itemManager.get(groupName)
         if(group == null){
             CustomAnvil.instance.logger.warning("Group $groupName do not exist but is ask by conflict $conflictName")
-            return DEFAULT_EMPTY_GROUP
+            return IncludeGroup("error_placeholder")
         }
 
         return group

src/main/kotlin/xyz/alexcrea/cuanvil/listener/ChatEventListener.kt

@@ -0,0 +1,47 @@
+package xyz.alexcrea.cuanvil.listener
+
+import io.delilaheve.CustomAnvil
+import org.bukkit.Bukkit
+import org.bukkit.entity.HumanEntity
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.player.AsyncPlayerChatEvent
+import org.bukkit.event.player.PlayerQuitEvent
+import java.util.*
+import java.util.concurrent.ConcurrentHashMap
+import java.util.function.Consumer
+
+class ChatEventListener : Listener{
+
+    private val playerListenMap: ConcurrentHashMap<UUID, Consumer<String?>> = ConcurrentHashMap()
+
+    fun setListenedCallback(playeruuid: UUID, callback: Consumer<String?>) {
+        playerListenMap[playeruuid] = callback
+    }
+
+    fun setListenedCallback(player: HumanEntity, callback: Consumer<String?>) {
+        setListenedCallback(player.uniqueId, callback)
+    }
+
+    @EventHandler
+    fun onQuit(event: PlayerQuitEvent) {
+        val eventCallback = playerListenMap.remove(event.player.uniqueId) ?: return
+        eventCallback.accept(null)
+
+    }
+
+    @EventHandler
+    fun onChat(event: AsyncPlayerChatEvent) {
+        if (event.isCancelled) return
+        val player = event.player
+        val eventCallback = playerListenMap.remove(player.uniqueId) ?: return
+
+        event.isCancelled = true
+
+        // sync callback with default server thread
+        Bukkit.getScheduler().runTask(CustomAnvil.instance, Runnable {
+            eventCallback.accept(event.message)
+        })
+    }
+
+}