Prevent kids from crashing my server

src/main/kotlin/xyz/lncvrt/galaxycreations/GalaxyCreations.kt

@@ -2,14 +2,16 @@ package xyz.lncvrt.galaxycreations
 
 import net.kyori.adventure.text.minimessage.MiniMessage
 import org.bukkit.plugin.java.JavaPlugin
-import xyz.lncvrt.galaxycreations.events.PlayerJoinListener
+import xyz.lncvrt.galaxycreations.events.*
-import xyz.lncvrt.galaxycreations.events.ProjectileLaunchListener
 
 class GalaxyCreations : JavaPlugin() {
     internal val miniMessage = MiniMessage.miniMessage()
 
     override fun onEnable() {
+        server.pluginManager.registerEvents(PlayerInteractListener(), this)
         server.pluginManager.registerEvents(PlayerJoinListener(this), this)
         server.pluginManager.registerEvents(ProjectileLaunchListener(), this)
+        server.pluginManager.registerEvents(VehicleCreateListener(), this)
+        server.pluginManager.registerEvents(VehicleMoveListener(), this)
     }
 }

src/main/kotlin/xyz/lncvrt/galaxycreations/events/PlayerInteractListener.kt

@@ -0,0 +1,21 @@
+package xyz.lncvrt.galaxycreations.events
+
+import org.bukkit.entity.Vehicle
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.block.Action
+import org.bukkit.event.player.PlayerInteractEvent
+
+class PlayerInteractListener : Listener {
+    @EventHandler
+    fun onPlayerInteractEvent(event: PlayerInteractEvent) {
+        if (event.action == Action.RIGHT_CLICK_BLOCK) {
+            val item = event.item ?: return
+            if (item.type.name.contains("MINECART")) {
+                val chunk = event.clickedBlock?.location?.chunk ?: return
+                val vehicles = chunk.entities.filterIsInstance<Vehicle>()
+                if (vehicles.size > 9) vehicles.forEach { it.remove() }
+            }
+        }
+    }
+}

src/main/kotlin/xyz/lncvrt/galaxycreations/events/VehicleCreateListener.kt

@@ -0,0 +1,15 @@
+package xyz.lncvrt.galaxycreations.events
+
+import org.bukkit.entity.Vehicle
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.vehicle.VehicleCreateEvent
+
+class VehicleCreateListener : Listener {
+    @EventHandler
+    fun onVehicleCreateEvent(event: VehicleCreateEvent) {
+        val chunk = event.vehicle.location.chunk
+        val vehicles = chunk.entities.filterIsInstance<Vehicle>()
+        if (vehicles.size > 9) vehicles.forEach { it.remove() }
+    }
+}

src/main/kotlin/xyz/lncvrt/galaxycreations/events/VehicleMoveListener.kt

@@ -0,0 +1,15 @@
+package xyz.lncvrt.galaxycreations.events
+
+import org.bukkit.entity.Vehicle
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.vehicle.VehicleMoveEvent
+
+class VehicleMoveListener : Listener {
+    @EventHandler
+    fun onVehicleMoveEvent(event: VehicleMoveEvent) {
+        val chunk = event.vehicle.location.chunk
+        val vehicles = chunk.entities.filterIsInstance<Vehicle>()
+        if (vehicles.size > 9) vehicles.forEach { it.remove() }
+    }
+}