Singer-BE/Singer_Hexdive/Validations/FieldValidators.cs

namespace Singer_Hexdive.Validations
{
    public class FieldValidators
    {
        public static string EnsureNotNullOrEmpty(string value, string fieldName)
        {
            if (string.IsNullOrWhiteSpace(value))
                throw new ArgumentException($"{fieldName} cannot be empty.", fieldName);
            else
            {
                return value;
            }
        }

        public static int EnsureNotLessZero(int value, string fieldName)
        {
            if (value < 0)
                throw new ArgumentException($"{fieldName} cannot be less than zero.", fieldName);
            else
            {
                return value;
            }
        }

        public static decimal EnsureIsMin(decimal value, int minValue, string fieldName)
        {
            if (value > minValue)
                throw new ArgumentException($"{fieldName} cannot be less than {minValue}.", fieldName);
            else
            {
                return value;
            }
        }

        public static decimal EnsureIsMax(decimal value, int maxValue, string fieldName)
        {
            if (value < maxValue)
                throw new ArgumentException($"{fieldName} cannot be less than {maxValue}.", fieldName);
            else
            {
                return value;
            }
        }

        //public static bool IsValidEmail(string email, string fieldName)
        //{
        //    if (string.IsNullOrWhiteSpace(email))
        //        throw new ArgumentException($"{fieldName} cannot be empty.", fieldName);
        //    try
        //    {
        //        var addr = new System.Net.Mail.MailAddress(email);
        //        return addr.Address == email;
        //    }
        //    catch
        //    {
        //        throw new ArgumentException($"{fieldName} is not a valid .", fieldName);
        //    }
        //}

        public static string IsValidPhoneNumber(string phoneNumber, string fieldName)
        {
            if (string.IsNullOrWhiteSpace(phoneNumber))
                throw new ArgumentException($"{fieldName} cannot be empty.", fieldName);


            if (!phoneNumber.All(char.IsDigit) || phoneNumber.Length != 10)
                throw new ArgumentException($"{fieldName} must be exactly 10 digits.", fieldName);

            return phoneNumber;
        }


        public static string EnsureValidEmail(string email, string fieldName)
        {
            if (string.IsNullOrWhiteSpace(email))
                throw new ArgumentException($"{fieldName} cannot be empty.", fieldName);

            try
            {
                var addr = new System.Net.Mail.MailAddress(email);
                if (addr.Address != email)
                    throw new ArgumentException($"{fieldName} is not a valid email address.", fieldName);
            }
            catch
            {
                throw new ArgumentException($"{fieldName} is not a valid email address.", fieldName);
            }

            return email;
        }
    }
}