public async Task <ActionResult> DropRegisteredClass(int studentEnrolledClassId, int classId)
{
var currentUser = CurrentLoginUser;
if (currentUser == null)
{
return(Ok(new { IsSuccess = false, Message = "There was an error while trying to register the class" }));
}
var dropStudentEnrolledClass = new StudentEnrolledClass
{
ClassId = classId,
UserId = currentUser.Id,
Id = studentEnrolledClassId
};
//let's drop this registered class
var isDropedRegisteredClass = await _classService.DropRegisteredClass(dropStudentEnrolledClass);
if (isDropedRegisteredClass)
{
return(Ok(new { IsSuccess = false, Message = "There was an error while trying to drop the class!" }));
}
return(Ok(new { IsSuccess = true, Message = "You have drop your registered class successfully" }));
}
public Task <bool> RegisterClass(StudentEnrolledClass newStudentEnrolledClassModel)
{
var currentDate = DateTime.UtcNow;
bool isOperationSuccess = true;
using (var ts = new TransactionScope())
{
try
{
var updateCasss = db.Class
.FirstOrDefault(f => f.Status == StatusConstants.Active &&
f.Id == newStudentEnrolledClassModel.ClassId);
if (updateCasss == null)
{
isOperationSuccess = false;
}
if (updateCasss.Capacity <= 0)
{
isOperationSuccess = false;
}
if (isOperationSuccess)
{
//let's add into student enroll class
newStudentEnrolledClassModel.EnrolledDate = currentDate;
db.StudentEnrolledClass.Add(newStudentEnrolledClassModel);
db.SaveChanges();
//let's update student class seat Capacity
updateCasss.Capacity = updateCasss.Capacity - 1;
updateCasss.ChangedDateUtc = currentDate;
db.SaveChanges();
}
}
catch
{
isOperationSuccess = false;
}
//to complete this transaction
if (isOperationSuccess)
{
ts.Complete();
}
ts.Dispose();
}
return(Task.Run(() => isOperationSuccess));
}
