implemented packet version of commands declare

CommandWhitelistBukkit/pom.xml

@@ -113,5 +113,11 @@
             <version>2.2.1</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>com.mojang</groupId>
+            <artifactId>brigadier</artifactId>
+            <version>1.0.17</version>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
 </project>

CommandWhitelistBukkit/src/main/java/eu/endermite/commandwhitelist/bukkit/CommandWhitelistBukkit.java

@@ -2,6 +2,8 @@ package eu.endermite.commandwhitelist.bukkit;
 
 import eu.endermite.commandwhitelist.bukkit.command.MainCommandExecutor;
 import eu.endermite.commandwhitelist.bukkit.listeners.*;
+import eu.endermite.commandwhitelist.bukkit.listeners.protocollib.PacketCommandPreProcessListener;
+import eu.endermite.commandwhitelist.bukkit.listeners.protocollib.PacketCommandSendListener;
 import eu.endermite.commandwhitelist.common.CWGroup;
 import eu.endermite.commandwhitelist.common.ConfigCache;
 import net.kyori.adventure.platform.bukkit.BukkitAudiences;
@@ -39,11 +41,12 @@ public class CommandWhitelistBukkit extends JavaPlugin {
 
         if (!getConfigCache().useProtocolLib || protocollib == null || !protocollib.isEnabled()) {
             getServer().getPluginManager().registerEvents(new PlayerCommandPreProcessListener(), this);
+            getServer().getPluginManager().registerEvents(new PlayerCommandSendListener(), this);
         } else {
             PacketCommandPreProcessListener.protocol(this);
+            PacketCommandSendListener.protocol(this);
             getLogger().info(ChatColor.AQUA + "Using ProtocolLib for command filter!");
         }
-        getServer().getPluginManager().registerEvents(new PlayerCommandSendListener(), this);
         try {
             // Use paper's async tab completions if possible
             Class.forName("com.destroystokyo.paper.event.server.AsyncTabCompleteEvent");

CommandWhitelistBukkit/src/main/java/eu/endermite/commandwhitelist/bukkit/listeners/protocollib/PacketCommandPreProcessListener.java

@@ -1,4 +1,4 @@
-package eu.endermite.commandwhitelist.bukkit.listeners;
+package eu.endermite.commandwhitelist.bukkit.listeners.protocollib;
 
 import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.ProtocolLibrary;

CommandWhitelistBukkit/src/main/java/eu/endermite/commandwhitelist/bukkit/listeners/protocollib/PacketCommandSendListener.java

@@ -0,0 +1,40 @@
+package eu.endermite.commandwhitelist.bukkit.listeners.protocollib;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.ProtocolManager;
+import com.comphenix.protocol.events.ListenerPriority;
+import com.comphenix.protocol.events.PacketAdapter;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.events.PacketEvent;
+import com.mojang.brigadier.tree.RootCommandNode;
+import eu.endermite.commandwhitelist.bukkit.CommandWhitelistBukkit;
+import eu.endermite.commandwhitelist.common.CWPermission;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+
+import java.util.HashSet;
+
+public class PacketCommandSendListener {
+
+    public static void protocol(CommandWhitelistBukkit plugin) {
+        ProtocolManager protocolManager = ProtocolLibrary.getProtocolManager();
+        commandSendListener(protocolManager, plugin);
+    }
+
+    public static void commandSendListener(ProtocolManager protocolManager, Plugin plugin) {
+        protocolManager.addPacketListener(new PacketAdapter(plugin, ListenerPriority.HIGHEST, PacketType.Play.Server.COMMANDS) {
+            @Override
+            public void onPacketSending(PacketEvent event) {
+                Player player = event.getPlayer();
+                if (player.hasPermission(CWPermission.BYPASS.permission())) return;
+
+                HashSet<String> commandList = CommandWhitelistBukkit.getCommands(player);
+                PacketContainer packet = event.getPacket();
+                RootCommandNode<?> node = (RootCommandNode<?>) packet.getModifier().getValues().get(0);
+                node.getChildren().removeIf((cmd) -> !commandList.contains(cmd.getName()));
+            }
+        });
+    }
+
+}