internal static string ToJsonAudit(this AgreementFile entity)
{
var state = JsonConvert.SerializeObject(new
{
entity.Id,
entity.Guid,
entity.AgreementId,
entity.Length,
entity.MimeType,
entity.Name,
entity.Path,
entity.FileName,
entity.Visibility,
});
return(state);
}
public void Handle(CreateFile command)
{
if (command == null)
{
throw new ArgumentNullException("command");
}
// create the initial entity
var entity = new AgreementFile
{
AgreementId = command.AgreementId,
Visibility = command.Visibility.AsEnum <AgreementVisibility>(),
Path = string.Format(AgreementFile.PathFormat, command.AgreementId, Guid.NewGuid()),
};
_entities.Create(entity);
// will we be moving an upload or creating a new file from scratch?
var upload = command.UploadGuid.HasValue
? _entities.Get <Upload>().Single(x => x.Guid.Equals(command.UploadGuid.Value)) : null;
// populate other entity properties and store binary data
if (upload != null)
{
entity.FileName = upload.FileName;
entity.Length = (int)upload.Length;
entity.MimeType = upload.MimeType;
entity.Name = GetExtensionedCustomName(command.CustomName, upload.FileName);
_binaryData.Move(upload.Path, entity.Path);
_purgeUpload.Handle(new PurgeUpload(upload.Guid)
{
NoCommit = true
});
}
else
{
entity.FileName = command.FileData.FileName;
entity.Length = command.FileData.Content.Length;
entity.MimeType = command.FileData.MimeType;
entity.Name = GetExtensionedCustomName(command.CustomName, command.FileData.FileName);
_binaryData.Put(entity.Path, command.FileData.Content, true);
}
// log audit
var audit = new CommandEvent
{
RaisedBy = command.Principal.Identity.Name,
Name = command.GetType().FullName,
Value = JsonConvert.SerializeObject(new
{
command.AgreementId,
command.CustomName,
command.Visibility,
command.UploadGuid,
FileData = command.FileData == null ? null : new
{
command.FileData.FileName,
ContentType = command.FileData.MimeType,
ContentLength = command.FileData.Content.Length,
}
}),
NewState = entity.ToJsonAudit(),
};
_entities.Create(audit);
try
{
_unitOfWork.SaveChanges();
command.CreatedFileId = entity.Id;
}
catch
{
// restore binary data state when the db save fails
if (_binaryData.Exists(entity.Path))
{
if (upload != null)
{
_binaryData.Move(entity.Path, upload.Path);
}
else
{
_binaryData.Delete(entity.Path);
}
}
}
}
