public async Task <IActionResult> CopyStudents(int groupId, CopyStudentsParameters parameters)
{
var destinationGroup = await groupsRepo.FindGroupByIdAsync(groupId).ConfigureAwait(false);
if (destinationGroup == null)
{
return(NotFound(new ErrorResponse($"Group {groupId} not found")));
}
var hasDestinationGroupEditAccess = await groupAccessesRepo.HasUserEditAccessToGroupAsync(destinationGroup.Id, UserId).ConfigureAwait(false);
if (!hasDestinationGroupEditAccess)
{
return(StatusCode((int)HttpStatusCode.Forbidden, new ErrorResponse($"You have no edit access to group {groupId}")));
}
var membersOfAllGroupsAvailableForUser = (await groupAccessesRepo.GetMembersOfAllGroupsAvailableForUserAsync(UserId).ConfigureAwait(false))
.Select(gm => gm.UserId);
var studentsToCopySet = parameters.StudentIds.ToHashSet();
studentsToCopySet.IntersectWith(membersOfAllGroupsAvailableForUser);
var newMembers = await groupMembersRepo.AddUsersToGroupAsync(groupId, studentsToCopySet).ConfigureAwait(false);
await notificationsRepo.AddNotificationAsync(
destinationGroup.CourseId,
new GroupMembersHaveBeenAddedNotification(groupId, parameters.StudentIds, usersRepo),
UserId
).ConfigureAwait(false);
return(Ok(new SuccessResponseWithMessage($"{newMembers.Count} students have been copied to group {groupId}")));
}
