Batch File Rename: Rename multiple files according to flexible rules

This class can rename multiple files according to flexible rules.

It can traverse a directory to find files that match certain conditions that may include the file name extension, the file name length, the file size, a regular expression that matches the file name, or a given callback function to perform custom file matching evaluation.

The matched files can be renamed according to certain rules that can be adding prefixes or suffixes to the file names, adding sequence numbers, replacing certain character sequences, change the case of the file name, etc..