public async Task <IActionResult> PutAssignment(Guid id, AssignmentEditDTO assignment)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
if (id != assignment.Id)
{
return(BadRequest());
}
var dbAssignment = assignmentMapper.MapAssignmentEditDTO(assignment);
dbAssignment.Slug = slugService.TransformText(dbAssignment.Name);
var collidingAssignment = await _context.Assignments
.Where(a => a.Course.Id == dbAssignment.Course.Id && a.Id != dbAssignment.Id && a.Slug == dbAssignment.Slug)
.FirstOrDefaultAsync();
if (collidingAssignment != null)
{
ModelState.AddModelError("name", $"Failed to generate unique url slug from the assignment name. The generated slug ({dbAssignment.Slug}) is used by another assignment of this course.");
return(BadRequest(ModelState));
}
var course = await _context.Courses
.Include(c => c.Professor)
.Include(c => c.Assistants)
.Include(c => c.Groups)
.Include(c => c.Students)
.FirstOrDefaultAsync(c => c.Id == dbAssignment.Course.Id);
var authorization = await authorizationService.AuthorizeAsync(User, course, AuthorizationConstants.CanUpdateCoursePolicy);
if (!authorization.Succeeded)
{
return(Forbid());
}
var existingAssignment = await _context.Assignments
.AsNoTracking()
.FirstOrDefaultAsync(a => a.Id == dbAssignment.Id);
dbAssignment.DateAdded = existingAssignment.DateAdded;
dbAssignment.LastUpdated = DateTime.UtcNow;
_context.Entry(dbAssignment).State = EntityState.Modified;
try {
await _context.SaveChangesAsync();
} catch (DbUpdateConcurrencyException) {
if (!AssignmentExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}
