getCoreUtilsAppValidatorsTemplate function

String getCoreUtilsAppValidatorsTemplate(String projectName)

Implementation

String getCoreUtilsAppValidatorsTemplate(String projectName) {
  return '''
import 'package:${projectName}/core/constants/app_strings.dart';

class AppValidators {
  /// Empty Field Validation
  static String? requiredField(String? value, {String fieldName = "Field"}) {
    if (value == null || value.trim().isEmpty) {
      return "\$fieldName is required";
    }
    return null;
  }

  /// Email Validation
  static String? email(String? value) {
    if (value == null || value.trim().isEmpty) {
      return "Email is required";
    }

    final regex = RegExp(r'^[\\w\\.-]+@([\\w-]+\\.)+[a-zA-Z]{2,4}\$');

    if (!regex.hasMatch(value)) {
      return "Enter valid email";
    }

    return null;
  }

  /// Password Validation
  static String? password(String? value) {
    if (value == null || value.isEmpty) {
      return "Password is required";
    }

    if (value.length < 8) {
      return "Password must be at least 8 characters";
    }

    final passwordRegex = RegExp(
      r'^(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\\\$&*~]).{8,}\$',
    );

    if (!passwordRegex.hasMatch(value)) {
      return "Password must contain 1 uppercase, 1 number and 1 special character";
    }

    return null;
  }

  /// Confirm Password Validation
  static String? confirmPassword(String? value, String password) {
    if (value == null || value.isEmpty) {
      return "Confirm password is required";
    }

    if (value != password) {
      return "Passwords do not match";
    }

    return null;
  }

  static String? newPassword(String? value, String currentPassword) {
    if (value == null || value.isEmpty) {
      return "New password is required";
    }

    if (value.length < 8) {
      return "Password must be at least 8 characters";
    }

    final regex = RegExp(r'^(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\\\$&*~]).{8,}\$');

    if (!regex.hasMatch(value)) {
      return "Password must contain 1 uppercase, 1 number and 1 special character";
    }

    if (value == currentPassword) {
      return "New password must be different from current password";
    }

    return null;
  }

  static String? confirmNewPassword(String? value, String newPassword) {
    if (value == null || value.isEmpty) {
      return "Confirm password is required";
    }

    if (value != newPassword) {
      return "Passwords do not match";
    }

    return null;
  }

  /// Phone Number Validation
  static String? phone(String? value) {
    if (value == null || value.isEmpty) {
      return "Phone number is required";
    }

    if (!RegExp(r'^[0-9]{8,15}\$').hasMatch(value)) {
      return "Enter valid phone number";
    }

    return null;
  }

  /// OTP Validation
  static String? otp(String? value, {int length = 4}) {
    if (value == null || value.isEmpty) {
      return "OTP is required";
    }

    if (value.length != length) {
      return "OTP must be \$length digits";
    }

    return null;
  }

  /// empty value
  static String? emptyValue(String? value, {String? message}) {
    if (value == null || value.trim().isEmpty) {
      return message ?? "value is required";
    }

    return null;
  }

  /// Name Validation
  static String? name(String? value) {
    if (value == null || value.trim().isEmpty) {
      return "Name is required";
    }

    if (value.length < 2) {
      return "Enter valid name";
    }

    return null;
  }

  /// last Name Validation
  static String? lastName(String? value) {
    if (value == null || value.trim().isEmpty) {
      return AppStrings.lastNameError;
    }

    return null;
  }

  /// Number Validation
  static String? number(String? value) {
    if (value == null || value.isEmpty) {
      return "Value is required";
    }

    if (!RegExp(r'^[0-9]+\$').hasMatch(value)) {
      return "Only numbers allowed";
    }

    return null;
  }

  /// URL Validation
  static String? url(String? value) {
    if (value == null || value.isEmpty) {
      return "URL is required";
    }

    final regex = RegExp(
      r'^(https?:\\/\\/)?([\\w\\-])+\\.{1}([a-zA-Z]{2,63})([\\/\\w\\.-]*)*\\/?\$',
    );

    if (!regex.hasMatch(value)) {
      return "Enter valid URL";
    }

    return null;
  }
}
''';
}