public IActionResult GetStudent(int id)
{
if (AddEnrolment.GetEnrollmentIdWithSemOne(id) == 13)
{
return(Ok("YES"));
}
return(NotFound("NO"));
}
public IActionResult EnrollStudent(AddEnrolment student)
{
var result = _service.EnrollStudent(student);
if (result.Studies != null)
{
return(CreatedAtAction(nameof(EnrollStudent), result));
}
return(BadRequest(result.IdStudent));
}
public AddEnrolment EnrollStudent(AddEnrolment student)
{
var random = new Random();
var idStudent = student.IdStudent;
var firstName = student.FirstName;
var lastName = student.LastName;
var birthDate = student.BirthDate;
var studies = student.Studies;
var isNumeric = int.TryParse(idStudent, out _);
if (string.IsNullOrEmpty(idStudent) || !isNumeric)
{
return(new AddEnrolment("Invalid Data In The Field IdStudent"));
}
if (string.IsNullOrEmpty(firstName) || !Regex.Match(firstName,
"^([A-Z])([a-z]{1,})$").Success)
{
return(new AddEnrolment("Invalid Data In The Field FirstName"));
}
if (string.IsNullOrEmpty(lastName) || !Regex.Match(lastName,
"^([A-Z])([a-z]{1,})$").Success)
{
return(new AddEnrolment("Invalid Data In The Field LastName"));
}
if (string.IsNullOrEmpty(birthDate) || !Regex.Match(birthDate,
@"^(0[1-9]|1[012])[\-](0[1-9]|[12][0-9]|3[01])[\-](19|20)\d\d$").Success)
{
return(new AddEnrolment("Invalid Data In The Field BirthDate"));
}
if (string.IsNullOrEmpty(studies) || !Regex.Match(studies,
"^([A-Z]{1})([A-Za-z]{1,})$").Success)
{
return(new AddEnrolment("Invalid Data In The Field Studies"));
}
if (AddEnrolment.IsThereStudentWithId(idStudent))
{
return(new AddEnrolment("Provided IdStudent Is Already In Use."));
}
if (!AddEnrolment.IsThereStudy(studies))
{
return(new AddEnrolment("There Is No Such Study"));
}
var createCustomEnrollment = !AddEnrolment.DoesStudyHaveSemesterOne(studies);
var studyId = AddEnrolment.GetStudyId(studies);
int customEnrollmentId;
while (true)
{
customEnrollmentId = random.Next(0, 2000);
if (!AddEnrolment.IsThereEnrollmentWithId(customEnrollmentId.ToString()))
{
break;
}
}
var enrollmentId = AddEnrolment.GetEnrollmentIdWithSemOne(studyId);
using (var sqlConnection =
new SqlConnection(
"Data Source=db-mssql;Initial Catalog=s19135;Integrated Security=True"))
{
sqlConnection.Open();
SqlTransaction transaction = sqlConnection.BeginTransaction("SampleTransaction");
if (createCustomEnrollment)
{
using (var customEnrollmentCommand = new SqlCommand())
{
customEnrollmentCommand.Connection = sqlConnection;
customEnrollmentCommand.CommandText = "INSERT INTO Enrollment" +
"(IdEnrollment, Semester, IdStudy, StartDate) " +
"VALUES (@IdEnrollment, @Semester, @IdStudy, @StartDate)";
customEnrollmentCommand.Parameters.AddWithValue("idEnrollment", customEnrollmentId);
customEnrollmentCommand.Parameters.AddWithValue("Semester", 1);
customEnrollmentCommand.Parameters.AddWithValue("IdStudy", studyId);
customEnrollmentCommand.Parameters.AddWithValue("StartDate", DateTime.Now);
customEnrollmentCommand.Transaction = transaction;
try
{
customEnrollmentCommand.ExecuteNonQuery();
}
catch (Exception e)
{
Console.WriteLine("Commit Exception Type: {0}", e.GetType());
Console.WriteLine(" Message: {0}", e.Message);
try
{
transaction.Rollback();
return(new AddEnrolment(e.Message));
}
catch (Exception e2)
{
Console.WriteLine("Rollback Exception Type: {0}", e2.GetType());
Console.WriteLine(" Message: {0}", e2.Message);
return(new AddEnrolment(e.Message));
}
}
}
}
using (var mainCommand = new SqlCommand())
{
mainCommand.Connection = sqlConnection;
mainCommand.CommandText = "INSERT INTO Student " +
"(IdStudent, FirstName, LastName, BirthDate, IdEnrollment) " +
"VALUES (@IdStudent, @FirstName, @LastName, @BirthDate, @IdEnrollment)";
mainCommand.Parameters.AddWithValue("idStudent", idStudent);
mainCommand.Parameters.AddWithValue("FirstName", firstName);
mainCommand.Parameters.AddWithValue("LastName", lastName);
if (!DateTime.TryParseExact(birthDate, "MM-dd-yyyy", null, DateTimeStyles.None,
out var simpleDate))
{
return(new AddEnrolment("Problem with Parsing the Date"));
}
mainCommand.Parameters.AddWithValue("BirthDate", simpleDate);
mainCommand.Parameters.AddWithValue("IdEnrollment", enrollmentId);
mainCommand.Transaction = transaction;
try
{
mainCommand.ExecuteNonQuery();
}
catch (Exception e)
{
Console.WriteLine("Commit Exception Type: {0}", e.GetType());
Console.WriteLine(" Message: {0}", e.Message);
try
{
transaction.Rollback();
return(new AddEnrolment(e.Message));
}
catch (Exception e2)
{
Console.WriteLine("Rollback Exception Type: {0}", e2.GetType());
Console.WriteLine(" Message: {0}", e2.Message);
return(new AddEnrolment(e.Message));
}
}
}
transaction.Commit();
}
AddEnrolment result = AddEnrolment.GetStudent(student.IdStudent);
return(result);
}
