public PathRoller(string path, RollingInterval interval)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
_interval = interval;
_periodFormat = interval.GetFormat();
var pathDirectory = Path.GetDirectoryName(path);
if (string.IsNullOrEmpty(pathDirectory))
{
pathDirectory = Directory.GetCurrentDirectory();
}
_directory = Path.GetFullPath(pathDirectory);
_filenamePrefix = Path.GetFileNameWithoutExtension(path);
_filenameSuffix = Path.GetExtension(path);
_filenameMatcher = new Regex(
"^" +
Regex.Escape(_filenamePrefix) +
"(?<" + PeriodMatchGroup + ">\\d{" + _periodFormat.Length + "})" +
"(?<" + SequenceNumberMatchGroup + ">_[0-9]{3,}){0,1}" +
Regex.Escape(_filenameSuffix) +
"$");
DirectorySearchPattern = $"{_filenamePrefix}*{_filenameSuffix}";
}
private string GetRealTargetPath(ILogEventInfo logEventInfo)
{
var indexOfLastPoint = _path.LastIndexOf('.');
return(indexOfLastPoint < 0
? $"{_path}{logEventInfo.Timestamp.DateTime.ToString(_rolling.GetFormat())}"
: $"{_path.Substring(0, indexOfLastPoint)}{logEventInfo.Timestamp.DateTime.ToString(_rolling.GetFormat())}.{_path.Substring(indexOfLastPoint + 1)}");
}