Refactor Project Structure for Maintainability

src/main/java/com/indra87g/Main.java

@@ -1,52 +1,13 @@
 package com.indra87g;
 
-import cn.nukkit.block.Block;
-import cn.nukkit.level.Level;
-import cn.nukkit.math.Vector3;
 import cn.nukkit.plugin.PluginBase;
-import cn.nukkit.command.Command;
-import cn.nukkit.command.CommandSender;
-import cn.nukkit.Player;
+import com.indra87g.commands.SetBlockCommand;
 
 public class Main extends PluginBase {
 
     @Override
     public void onEnable() {
-        getLogger().info("plugin activated!");
-
-        this.getServer().getCommandMap().register("setblock", new Command("setblock") {
-            @Override
-            public boolean execute(CommandSender sender, String label, String[] args) {
-                if (!(sender instanceof Player)) {
-                    sender.sendMessage("This command can only be used by player.");
-                    return false;
-                }
-
-                Player player = (Player) sender;
-                Level level = player.getLevel();
-
-                if (args.length != 4) {
-                    player.sendMessage("§cusage: /setblock <x> <y> <z> <block_id>");
-                    return false;
-                }
-
-                try {
-                    int x = Integer.parseInt(args[0]);
-                    int y = Integer.parseInt(args[1]);
-                    int z = Integer.parseInt(args[2]);
-                    int blockId = Integer.parseInt(args[3]);
-
-                    Vector3 pos = new Vector3(x, y, z);
-                    Block block = Block.get(blockId);
-
-                    level.setBlock(pos, block);
-                    player.sendMessage("§aBlock " + block.getName() + " successfully placed in  (" + x + ", " + y + ", " + z + ")");
-                } catch (NumberFormatException e) {
-                    player.sendMessage("§cMake sure all arguments are valid numbers. ");
-                }
-
-                return true;
-            }
-        });
+        getLogger().info("ContohPlugin has been enabled.");
+        this.getServer().getCommandMap().register("setblock", new SetBlockCommand());
     }
 }

src/main/java/com/indra87g/commands/SetBlockCommand.java

@@ -0,0 +1,48 @@
+package com.indra87g.commands;
+
+import cn.nukkit.Player;
+import cn.nukkit.block.Block;
+import cn.nukkit.command.Command;
+import cn.nukkit.command.CommandSender;
+import cn.nukkit.level.Level;
+import cn.nukkit.math.Vector3;
+
+public class SetBlockCommand extends Command {
+
+    public SetBlockCommand() {
+        super("setblock", "Sets a block at a specific location", "/setblock <x> <y> <z> <block_id>");
+    }
+
+    @Override
+    public boolean execute(CommandSender sender, String commandLabel, String[] args) {
+        if (!(sender instanceof Player)) {
+            sender.sendMessage("This command can only be used by a player.");
+            return false;
+        }
+
+        Player player = (Player) sender;
+        Level level = player.getLevel();
+
+        if (args.length != 4) {
+            player.sendMessage("§cUsage: " + this.getUsage());
+            return false;
+        }
+
+        try {
+            int x = Integer.parseInt(args[0]);
+            int y = Integer.parseInt(args[1]);
+            int z = Integer.parseInt(args[2]);
+            int blockId = Integer.parseInt(args[3]);
+
+            Vector3 pos = new Vector3(x, y, z);
+            Block block = Block.get(blockId);
+
+            level.setBlock(pos, block);
+            player.sendMessage("§aBlock " + block.getName() + " successfully placed at (" + x + ", " + y + ", " + z + ")");
+        } catch (NumberFormatException e) {
+            player.sendMessage("§cPlease provide valid numbers for coordinates and block ID.");
+        }
+
+        return true;
+    }
+}

src/main/resources/plugin.yml

@@ -4,3 +4,12 @@ version: 0.1.0
 api: 1.0.0
 author: indra87g
 description: Plugin Nukkit dari GitHub Actions
+commands:
+  setblock:
+    description: "Sets a block at a specific location"
+    usage: "/setblock <x> <y> <z> <block_id>"
+    permission: contohplugin.command.setblock
+permissions:
+  contohplugin.command.setblock:
+    description: "Allows the user to use the /setblock command"
+    default: op