App\Modules\Users\Controllers\Admin\Roles::validate PHP Method

    protected function validate(array $data, $id = null)
    {
        if (!is_null($id)) {
            $ignore = ',' . intval($id);
        } else {
            $ignore = '';
        }
        // The Validation rules.
        $rules = array('name' => 'required|min:4|max:40|valid_name', 'slug' => 'required|min:4|max:40|alpha_dash|unique:roles,slug' . $ignore, 'description' => 'required|min:5|max:255');
        $messages = array('valid_name' => __d('users', 'The :attribute field is not a valid name.'));
        $attributes = array('name' => __d('users', 'Name'), 'slug' => __d('users', 'Slug'), 'description' => __d('users', 'Description'));
        // Add the custom Validation Rule commands.
        Validator::extend('valid_name', function ($attribute, $value, $parameters) {
            $pattern = '~^(?:[\\p{L}\\p{Mn}\\p{Pd}\'\\x{2019}]+(?:$|\\s+)){1,}$~u';
            return preg_match($pattern, $value) === 1;
        });
        return Validator::make($data, $rules, $messages, $attributes);
    }