public static bool TryParse(string peselText, out Pesel pesel)
{
pesel = new Pesel(peselText);
if (peselText.Length == 11)
{
int checkNumbersAllTheSame = 0;
for (int i = 0; i < 11; i++)
{
if (peselText[0] == peselText[i])
{
checkNumbersAllTheSame++;
}
}
if (checkNumbersAllTheSame == 11)
{
return(false);
}
int sumOfValidateNumbers = 0;
int[] arrayOfValiationNumbers = { 1, 3, 7, 9, 1, 3, 7, 9, 1, 3 };
int lastNumberOfPesel = (int)Char.GetNumericValue(peselText[10]);
for (int i = 0; i < 10; i++)
{
int peselTextToNumber = (int)Char.GetNumericValue(peselText[i]);
sumOfValidateNumbers += (peselTextToNumber * arrayOfValiationNumbers[i]);
}
int validateSum = 10 - sumOfValidateNumbers % 10;
validateSum = (validateSum == 10) ? 0 : validateSum;
if (validateSum == lastNumberOfPesel)
{
return(true);
}
}
return(false);
}
public AddStudentResult AddStudent(Student studentToAdd)
{
if (studentsList.Contains(studentToAdd))
{
addStudentResult = AddStudentResult.StudentIsExist;
}
else if (!Pesel.TryParse(studentToAdd.Pesel, out pesel))
{
addStudentResult = AddStudentResult.FailedToAddStudent;
}
else
{
addStudentResult = AddStudentResult.SuccessToAddStudent;
studentsList.Add(studentToAdd);
}
return(addStudentResult);
}
