public async Task <List <int> > DeleteCheckPoint(List <int> checkpointsId)
{
List <int> unDeletedCheckpoints = new List <int>();
foreach (int checkpointId in checkpointsId)
{
var checkpoint = await checkpointRepository.GetCheckPointById(checkpointId);
if (checkpoint == null)
{
throw new Exception("checkpoint not exist");
}
if (checkpoint.SubTasks.Count > 0)
{
unDeletedCheckpoints.Add(checkpointId);
}
else
{
await checkpointRepository.DeleteCheckpointById(checkpointId);
}
}
await checkpointRepository.SaveChanges();
return(unDeletedCheckpoints);
}