validationTextField static method

String? validationTextField({ required dynamic controller, required String error, required String lengthMin, required String lengthMax, required int main, required int max, })

Implementation

static String? validationTextField({
  required var controller,
  required String error,
  required String lengthMin,
  required String lengthMax,
  required int main,
  required int max,
}) {
  ///this is for check if controller equal  TextEditingController or no
  /// for if controller equal TextEditingController do it [controller.text] else do it [controller.trim() or anything]
  if (controller is TextEditingController) {
    ///if text is equal Empty return error
    if (controller.text.trim().isEmpty) {
      return error.toString();
      ///if the length of the text is less than the minimum
    } else if (controller.text.trim().length < main) {
      return lengthMin.toString();
      ///If the length of the text is greater than the maximum
    } else if (controller.text.trim().length > max) {
      return lengthMax.toString();
    }
     ///if text is equal Empty return error
  } else if (controller.trim() != null && controller.trim().isEmpty) {
    return error.toString();
    ///if the length of the text is less than the minimum
  } else if (controller.trim().length < main) {
    return lengthMin.toString();
    ///If the length of the text is greater than the maximum
  } else if (controller.trim().length > max) {
    return lengthMax.toString();
  }
}