public long UploadFile(File dbFile, Stream stream)
{
if (dbFile == null) throw new ArgumentNullException("dbFile");
if (dbFile.UserId <= 0) throw new ArgumentException("dbFile.UserId <= 0", "dbFile");
if (stream == null) throw new FileNotFoundException();
dbFile.Size = stream.Length;
dbFile.Uploaded = DateTime.Now;
AddOrUpdateFileInformation(dbFile);
try
{
SaveFileToStorage(dbFile.FileId, stream);
}
catch (ErrorLoadingFileException)
{
DeleteFileFromStorage(dbFile.FileId);
DeleteFileFromDatabase(dbFile.FileId);
throw;
}
return dbFile.FileId;
}
private void IncrementNumberOfDownloads(File dbFile)
{
if (dbFile == null) throw new ArgumentNullException("dbFile");
dbFile.NumberOfDownloads++;
_context.Files.Attach(dbFile);
_context.Entry(dbFile).Property(file => file.NumberOfDownloads).IsModified = true;
_context.SaveChanges();
}
public long AddOrUpdateFileInformation(File dbFile)
{
if (dbFile == null) throw new ArgumentNullException("dbFile");
if (string.IsNullOrEmpty(dbFile.Category)) throw new ArgumentNullException("dbFile.Category");
string fileName = Path.GetFileName(dbFile.Name);
//Проверка GetInvalidFileNameChars() т.к GetFileName проверяет только на GetInvalidPathChars()
string fileNameWithoutExtension;
if (fileName == null || (fileNameWithoutExtension = Path.GetFileNameWithoutExtension(fileName)) == null ||
fileNameWithoutExtension.Length == 0 || string.IsNullOrWhiteSpace(fileNameWithoutExtension) ||
fileName.IndexOfAny(Path.GetInvalidFileNameChars()) != -1)
throw new BadFileNameException(dbFile.Name);
dbFile.Name = fileName.Trim();
string fileExtension = Path.GetExtension(fileName);
if (!_allowedFileExtension.Contains(fileExtension))
throw new NotAllowedFileExtensionException(fileExtension);
if (_categories.All(category => dbFile.Category != category))
{
dbFile.Category = _categories[0];
}
if (dbFile.FileId <= 0)
{
if (string.IsNullOrWhiteSpace(dbFile.Name)) throw new BadFileNameException("file name is null or emty");
if (dbFile.UserId <= 0) throw new ArgumentException("dbFile.UserId <= 0", "dbFile");
if (dbFile.NumberOfDownloads < 0) throw new ArgumentException("dbFile.NumberOfDownloads < 0", "dbFile");
if (dbFile.Size < 0) throw new ArgumentException("dbFile.Size < 0", "dbFile");
dbFile.Vote = new Vote();
_context.Files.Add(dbFile);
}
else
{
File old = _context.Files.Find(dbFile.FileId);
var oldEentry = _context.Entry(old);
if (oldEentry != null)
{
oldEentry.State = EntityState.Detached;
}
_context.Files.Attach(dbFile);
var newEntry = _context.Entry(dbFile);
if (dbFile.Name != null)
{
newEntry.Property(file => file.Name).IsModified = true;
}
if (dbFile.Category != null)
{
newEntry.Property(file => file.Category).IsModified = true;
}
newEntry.Property(file => file.Description).IsModified = true;
}
_context.SaveChanges();
return dbFile.FileId;
}
