Usefull validators for dart

validators

class Validators {
  static bool validateEmail(String value) {
    if (value.isEmpty) return false;
    final String pattern =
        r'^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$';
    final regex = RegExp(pattern);
    final result = regex.hasMatch(value);
    return result;
  }

  static bool validateField(String value) {
    if (value.isEmpty) return false;
    return true;
  }

  static bool validatePhone(String value) {
    if (value.isEmpty) return false;
    // Valid only for Br phone number "(99) 9999-9999" or "(99) 99999-9999"
    final String pattern = r'^\(([0-9]{2,3})\)([ ])([0-9]{4,5})([-])([0-9]{4})';
    final regex = RegExp(pattern);
    final result = regex.hasMatch(value);
    return result;
  }

  static bool validatePassword(String value) {
    if (value.isEmpty) return false;
    final result = (value.length < 6 || value.length > 20) ? false : true;
    return result;
  }
}

extension StringExtension on String {
  bool isValidEmail() {
    return Validators.validateEmail(this);
  }

  bool isValidField() {
    return Validators.validateField(this);
  }

  bool isValidPhone() {
    return Validators.validatePhone(this);
  }

  bool isValidPassword() {
    return Validators.validatePassword(this);
  }
}