nfn

#!/usr/bin/env python3
# nfn - Normalize File Name
# Made in conversation with ChatGPT / GPT-4
# 2023-05-12 tzatko
#
# dependences:
# pip install unidecode
#

import os
import argparse
from unidecode import unidecode

def sanitize_filename(filename):
    # Convert to closest ASCII representation, remove leading/trailing spaces
    filename = unidecode(filename).strip()

    # Replace problematic characters and spaces with underscore
    for char in r' <>:"/\|?*':
        filename = filename.replace(char, '_')

    # Trim the filename length to 200 characters, ensuring not to cut the file extension
    name, ext = os.path.splitext(filename)
    if len(filename) > 200:
        name = name[:200-len(ext)]
        filename = name + ext

    return filename

def reverse_sanitize_filename(filename):
    # Convert underscores to spaces
    return filename.replace('_', ' ')

def normalize_filenames(root_dir, reverse=False):
    for dirpath, dirnames, filenames in os.walk(root_dir, topdown=False):
        for filename in filenames:
            if reverse:
                new_filename = reverse_sanitize_filename(filename)
            else:
                new_filename = sanitize_filename(filename)
            if filename != new_filename:
                os.rename(
                    os.path.join(dirpath, filename),
                    os.path.join(dirpath, new_filename)
                )

        for dirname in dirnames:
            if reverse:
                new_dirname = reverse_sanitize_filename(dirname)
            else:
                new_dirname = sanitize_filename(dirname)
            if dirname != new_dirname:
                os.rename(
                    os.path.join(dirpath, dirname),
                    os.path.join(dirpath, new_dirname)
                )

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Normalize or reverse normalize filenames")
    parser.add_argument("-r", "--reverse", action="store_true", help="Reverse the renaming by changing underscores to spaces")
    args = parser.parse_args()

    normalize_filenames('.', reverse=args.reverse)