feat(input): add Groupable interface, make Command groupable

src/Input/Command.php

@@ -27,12 +27,14 @@
  *
  * @link    https://github.com/adhocore/cli
  */
-class Command extends Parser
+class Command extends Parser implements Groupable
 {
     use InflectsString;
 
     protected $_action = null;
 
+    protected string $_group;
+
     protected string $_version = '';
 
     protected string $_usage = '';
@@ -58,6 +60,7 @@ public function __construct(
         protected ?App $_app = null
     ) {
         $this->defaults();
+        $this->inGroup(str_contains($_name, ':') ? strstr($_name, ':', true) : '');
     }
 
     /**
@@ -102,6 +105,24 @@ public function desc(): string
         return $this->_desc;
     }
 
+    /**
+     * Sets command group.
+     */
+    public function inGroup(string $group): self
+    {
+        $this->_group = $group;
+
+        return $this;
+    }
+
+    /**
+     * Gets command group.
+     */
+    public function group(): string
+    {
+        return $this->_group;
+    }
+
     /**
      * Get the app this command belongs to.
      */

src/Input/Groupable.php

@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the PHP-CLI package.
+ *
+ * (c) Jitendra Adhikari <[email protected]>
+ *     <https://github.com/adhocore>
+ *
+ * Licensed under MIT license.
+ */
+
+namespace Ahc\Cli\Input;
+
+/**
+ * Groupable.
+ *
+ * @author  Jitendra Adhikari <[email protected]>
+ * @license MIT
+ *
+ * @link    https://github.com/adhocore/cli
+ */
+interface Groupable
+{
+    /**
+     * Sets the group.
+     */
+    public function inGroup(string $group): self;
+
+    /**
+     * Gets the group.
+     */
+    public function group(): string;
+}