static void Rotate(Parameters parameters, RotationInfo ri)
{
string destination;
foreach (var(number, filepath) in Enumerate(ri).OrderByDescending(x => x.number))
{
if (number == parameters.FileCount)
{
Logger.Info($"Deleting: '{filepath}'");
File.Delete(filepath);
Logger.Info("Deleted");
}
else
{
destination = $"{ri.Directory}{Path.DirectorySeparatorChar}{ri.Name}.{number + 1}.{ri.Extension}";
Logger.Info($"Moving: '{filepath}' => '{destination}'");
File.Move(filepath, destination);
Logger.Info("Moved");
}
}
destination = $"{ri.Directory}{Path.DirectorySeparatorChar}{ri.Name}.2.{ri.Extension}";
Logger.Info($"Moving: '{ri.FullPath}' => '{destination}'");
File.Move(ri.FullPath, destination);
Logger.Info("Moved");
}
static IEnumerable <(int number, string filepath)> Enumerate(RotationInfo ri)
{
string number;
foreach (var filepath in Directory.EnumerateFiles(ri.Directory, $"{ri.Name}.*.{ri.Extension}"))
{
//
// On Windows, Directory.EnumerateFiles returns all paths in lower case
// regardless of their actual case.
//
number = filepath.ToLower()
.Replace(ri.Directory.ToLower() + Path.DirectorySeparatorChar, "")
.Replace(ri.Name.ToLower() + '.', "")
.Replace('.' + ri.Extension.ToLower(), "");
yield return(int.Parse(number), filepath);
}
}