Python script, uses mkbrr to rename files from .session folder

rename_torr.py

import os
import subprocess
import re
from collections import defaultdict

# Directory containing the .torrent files like 534DB1275682C6F5CFC5EE0C10D414B84CB84BC4.torrent
torrent_dir = "~/Downloads"

# Map to track name collisions
name_counts = defaultdict(int)

def sanitize_filename(name):
    # Remove or replace characters that are not valid in filenames
    return re.sub(r'[<>:"/\\|?*]', '_', name)

def get_name_from_mkbrr(filepath):
    try:
        result = subprocess.run(["mkbrr", "inspect", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
        for line in result.stdout.splitlines():
            if line.startswith("  Name:"):
                return line.split(":", 1)[1].strip()
    except Exception as e:
        print(f"Error inspecting file {filepath}: {e}")
    return None

def main():
    for filename in os.listdir(torrent_dir):
        if not filename.lower().endswith(".torrent"):
            continue

        full_path = os.path.join(torrent_dir, filename)
        name = get_name_from_mkbrr(full_path)
        if not name:
            print(f"Skipping {filename} - name not found")
            continue

        sanitized_name = sanitize_filename(name)
        base_name = sanitized_name
        count = name_counts[base_name]

        while True:
            new_filename = f"{base_name}.torrent" if count == 0 else f"{base_name}_{count}.torrent"
            new_path = os.path.join(torrent_dir, new_filename)
            if not os.path.exists(new_path):
                break
            count += 1

        # Update count for the base name
        name_counts[base_name] = count + 1

        # Rename the file
        try:
            os.rename(full_path, new_path)
            print(f"Renamed: {filename} → {new_filename}")
        except Exception as e:
            print(f"Error renaming {filename} to {new_filename}: {e}")

if __name__ == "__main__":
    main()