private async Task ValidateAndSave()
{
if (_currentIndex != null)
{
// Validate
var hasErrors = false;
if (!_hasId)
{
_messages.AddLast($"Parameter guid[{_currentIndex}] is not provided.");
hasErrors = true;
}
for (var i = 0; i < _files.Length; i++)
{
if (_files[i] == null)
{
_messages.AddLast($"Parameter file{i + 1}[{_currentIndex}] is not provided.");
hasErrors = true;
}
}
// Write to DB
if (hasErrors)
{
// Remove created files
foreach (var filename in _files)
{
if (filename == null)
{
continue;
}
try
{
_fileStore.Delete(filename);
}
catch (Exception ex)
{
_logger.LogError(ex.Message);
}
}
_messages.AddLast($"Skipping object [{_currentIndex}]. See _messages above to get more information.");
}
else
{
try
{
var a = _aContext.A.Find(_id);
if (a == null) // A with the same id does not exist in the DB
{
await _aContext.A.AddAsync(new A(_id, _files[0], _files[1], _files[2]));
}
else // A with the same id already exists in the DB
{
a.File1 = _files[0];
a.File2 = _files[1];
a.File3 = _files[2];
_messages.AddLast($"Object with id = {_id} was already presented in the databse and will be overwritten.");
}
await _aContext.SaveChangesAsync();
}
catch (Exception ex)
{
_messages.AddLast($"An error occured when saving [{_currentIndex}], id = {_id}. The object was not saved to the database.");
_logger.LogError(ex.Message);
}
}
// Reset state
_hasId = false;
_id = Guid.Empty;
for (var i = 0; i < _files.Length; i++)
{
_files[i] = null;
}
}
}