private StreamWriter GetLogWriter(IFileStorage storage)
{
string fileToUse;
if (!storage.FileExists(FILE1_NAME) || storage.GetFileSize(FILE1_NAME) < MAX_LOG_FILE_SIZE)
{
fileToUse = FILE1_NAME;
}
else if (!storage.FileExists(FILE2_NAME) || storage.GetFileSize(FILE2_NAME) < MAX_LOG_FILE_SIZE)
{
fileToUse = FILE2_NAME;
}
else
{
storage.DeleteFileIfExists(FILE1_NAME);
storage.RenameFile(FILE2_NAME, FILE1_NAME);
fileToUse = FILE2_NAME;
}
return storage.OpenWriter(fileToUse, true);
}