public async Task <IActionResult> DownloadExam(int id, string studentId)
{
if (string.IsNullOrEmpty(studentId))
{
return(BadRequest());
}
var userId = _userManager.GetUserId(this.User);
if (!await _trainerService.IsTrainer(id, userId))
{
return(BadRequest());
}
var studentInCourseNames = await _trainerService.StudentInCourseNamesAsync(id, studentId);
if (studentInCourseNames == null)
{
return(BadRequest());
}
var examContents = await _trainerService.GetExamSubmission(id, studentId);
if (examContents == null)
{
return(BadRequest("No exam submitted."));
}
return(File(examContents, "application/zip", $"{studentInCourseNames.CourseName}-{studentInCourseNames.UserName}-{DateTime.UtcNow.ToString(DateTimeFormat)}.zip"));
}