/// <summary>
/// Checks if a string value is a valid CPF representation
/// </summary>
/// <param name="value">a CPF string to be checked</param>
/// <param name="punctuation">the punctuation setting to
/// how validation must be handled</param>
/// <returns>true if CPF string is valid; false otherwise</returns>
internal static bool Validate(string value, CpfPunctuation punctuation)
{
if (StringHelper.IsNullOrWhiteSpace(value))
{
return(false);
}
if (!Regex.IsMatch(value, CpfHelper.regexValidations[punctuation]))
{
return(false);
}
value = CpfHelper.Sanitize(value);
if (CpfHelper.IsSameDigit(value))
{
return(false);
}
var inputDigit1 = int.Parse(
value.Substring(9, 1),
CultureInfo.InvariantCulture);
var inputDigit2 = int.Parse(
value.Substring(10, 1),
CultureInfo.InvariantCulture);
var calcDigit1 = CpfHelper.CreateChecksum(value.Substring(0, 9));
var calcDigit2 = CpfHelper.CreateChecksum(value.Substring(0, 10));
return(inputDigit1 == calcDigit1 && inputDigit2 == calcDigit2);
}
/// <summary>
/// Initializes a new instance of the <see cref="Cpf"/> class.
/// </summary>
/// <param name="value">a valid CPF string.</param>
/// <param name="punctuation">the punctuation setting to
/// how validation must be handled.</param>
public Cpf(string value, CpfPunctuation punctuation)
{
if (StringHelper.IsNullOrWhiteSpace(value))
{
throw new ArgumentException("O CPF não pode ser nulo ou branco");
}
if (!CpfHelper.Validate(value, punctuation))
{
throw new ArgumentException("O CPF não é válido");
}
this.parsedValue = CpfHelper.Sanitize(value);
this.Punctuation = punctuation;
}
/// <summary>
/// Completes a partial CPF string by appending a valid checksum trailing
/// </summary>
/// <param name="value">a partial CPF string with or without punctuation</param>
/// <returns>a CPF string with a valid checksum trailing</returns>
internal static string Complete(string value)
{
if (StringHelper.IsNullOrWhiteSpace(value))
{
throw new ArgumentException("O CPF é inválido");
}
value = CpfHelper.Sanitize(value);
if (!Regex.IsMatch(value, @"\d{9}"))
{
throw new ArgumentException("O CPF é inválido");
}
int digit1 = CpfHelper.CreateChecksum(value);
int digit2 = CpfHelper.CreateChecksum(value + digit1.ToString());
return(value + digit1.ToString() + digit2.ToString());
}
