import file extension validation

app/Http/Requests/Common/Import.php

@@ -24,7 +24,7 @@ class Import extends FormRequest
     public function rules()
     {
         return [
-            'import' => 'required|file',
+            'import' => 'required|file|extension:xls,xlsx',
         ];
     }
 }

app/Providers/Validation.php

@@ -52,6 +52,14 @@ class Validation extends Provider
         },
             trans('validation.custom.invalid_amount', ['attribute' => $amount])
         );
+
+        Validator::extend('extension', function ($attribute, $value, $parameters, $validator) {
+            $extension = $value->getClientOriginalExtension();
+
+            return !empty($extension) && in_array($extension, $parameters);
+        },
+            trans('validation.custom.invalid_extension')
+        );
     }
 
     /**

resources/lang/en-GB/validation.php

@@ -104,6 +104,7 @@ return [
         ],
         'invalid_currency'      => 'The :attribute code is invalid.',
         'invalid_amount'        => 'The amount :attribute is invalid.',
+        'invalid_extension'     => 'The file extension is invalid.',
     ],
 
     /*