Prevent players from dropping items

src/de/anura/core/events/DropItem.java

@@ -0,0 +1,29 @@
+package de.anura.core.events;
+
+import de.anura.core.AnuraCore;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerDropItemEvent;
+
+public class DropItem implements Listener {
+
+    public DropItem(AnuraCore plugin) {
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+    }
+
+    @EventHandler
+    public void onPlayerDropItem(PlayerDropItemEvent event) {
+        if (AnuraCore.getInstance().getConfig().getBoolean("is-main-lobby") && !event.getPlayer().hasPermission("core.inventory.interact")) {
+            event.setCancelled(true);
+            final Player P = event.getPlayer();
+            Bukkit.getScheduler().scheduleSyncDelayedTask(AnuraCore.getInstance(), new Runnable() {
+                @Override
+                public void run() {
+                    P.updateInventory();
+                }
+            }, 2);
+        }
+    }
+}