Add validation to directory key

src/DependencyInjection/Configuration.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Pcm\IconBundle\DependencyInjection;
 
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
@@ -18,12 +19,50 @@ class Configuration implements ConfigurationInterface
                 ->arrayNode('directories')
                     ->scalarPrototype()->end()
                 ->end()
-                ->arrayNode('palletes')
+                ->arrayNode('palletes') // Akshewally it is defined
                     ->variablePrototype()->end()
                 ->end()
             ->end()
         ;
 
+        $this->addValidationRules($treeBuilder->getRootNode());
+
         return $treeBuilder;
     }
+
+    private function addValidationRules(ArrayNodeDefinition $rootNode): void
+    {
+        $rootNode
+            ->children()
+                ->arrayNode('directories')
+                    ->validate()
+                        ->ifEmpty()
+                        ->thenInvalid("Directories cannot be empty!")
+                    ->end()
+                    ->scalarPrototype()
+                        ->validate()
+                            ->ifTrue(fn($path) => !is_dir($path))
+                            ->thenInvalid('%s is not a directory!')
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+        ;
+        // $rootNode
+        //     ->children()
+        //         ->arrayNode('directories')
+        //             ->scalarPrototype()
+        //                 ->validate()
+        //                     ->ifTrue(function ($value) {
+        //                         // Add validation logic for directories here
+        //                         return false;
+        //                     })
+
+        //                     ->thenInvalid('Invalid directory')
+        //                 ->end()
+        //             ->end()
+        //         ->end()
+        //     ->end()
+        // ;
+    }
 }