Vanilla Commands Rework and Additions

.gitignore

@@ -36,7 +36,9 @@ out/
 
 # Vanilla-like server
 server.properties
-world/
+survival/world/
 /datapack-tests/mojang-data
 /mojang-data/1.20.4
 /mojang-data/1.21.1
+/survival/world/
+/world/

commands/src/main/java/net/minestom/vanilla/commands/VanillaCommand.java

@@ -0,0 +1,68 @@
+package net.minestom.vanilla.commands;
+
+import net.kyori.adventure.text.Component;
+import net.minestom.server.command.CommandSender;
+import net.minestom.server.command.ConsoleSender;
+import net.minestom.server.command.builder.Command;
+import net.minestom.server.command.builder.CommandContext;
+import net.minestom.server.command.builder.condition.CommandCondition;
+import net.minestom.server.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Abstract base class for Vanilla commands.
+ * Includes permission level handling and shared utility methods.
+ */
+public abstract class VanillaCommand extends Command {
+
+    public final int LEVEL_ALL = 0;
+    public final int LEVEL_MODERATOR = 1;
+    public final int LEVEL_GAMEMASTER = 2;
+    public final int LEVEL_ADMIN = 3;
+    public final int LEVEL_OWNER = 4;
+
+    public VanillaCommand(@NotNull String name, @Nullable String... aliases) {
+        super(name, aliases);
+    }
+
+    public VanillaCommand(@NotNull String name) {
+        super(name);
+    }
+
+    /**
+     * Returns the usage message for this command, required and used for /help command.
+     *
+     * @param sender  the command sender
+     * @param context the command context
+     * @return the usage message as a Component
+     */
+    public abstract Component usage(CommandSender sender, CommandContext context);
+
+    protected abstract void defaultor(CommandSender sender, CommandContext context);
+
+    /**
+     * Creates a command condition that checks if the sender has the required permission level.
+     * Console senders are always allowed.
+     *
+     * @param level the required permission level
+     * @return the command condition
+     */
+    public CommandCondition permission(int level) {
+        return (sender, commandName) -> {
+            if (sender instanceof ConsoleSender) return true;
+            if (sender instanceof Player player) return player.getPermissionLevel() >= level;
+            return false;
+        };
+    }
+
+    /**
+     * Checks whether the command was invoked without any arguments.
+     *
+     * @param context the command context
+     * @return true if no arguments were given, false otherwise
+     */
+    public boolean hasNoArguments(CommandContext context) {
+        return context.getCommandName().equals(context.getInput());
+    }
+}