Python script to decode BDStudio project file to JSON. BDStudio: https://eszesbalint.github.io/bdstudio

bdstudio_decode.py

import gzip, argparse, json, base64, os
from io import TextIOWrapper
from typing import Any

PRETTY_INDENT = 2

def main():
    parser = argparse.ArgumentParser(
                        prog='bdstudio_decode.py',
                        description='Decode BDStudio (https://eszesbalint.github.io/bdstudio) project to JSON',
                        epilog='By https://github.com/BoBkiNN')
    parser.add_argument('input', type=argparse.FileType("r", encoding="utf-8"), help="Input .bdstudio file")
    parser.add_argument('out', type=argparse.FileType("w", encoding="utf-8"), help="Output JSON file")
    parser.add_argument('-p', '--pretty', action='store_true', help="Writes pretty JSON instead of minimized")
    args = parser.parse_args()
    input: TextIOWrapper = args.input
    out: TextIOWrapper = args.out
    pretty: bool = args.pretty
    print(f"Loading project {input.name}")
    d = load_proj(input)
    input.close()
    if d is None:
        os.remove(out.name)
        return
    s = save_data(d, out, pretty)
    if s:
        print(f"Done! Saved {out.name}")
    else:
        os.remove(out.name)
    

def save_data(data: dict[str, Any], out: TextIOWrapper, pretty: bool):
    try:
        json.dump(data, out, indent= PRETTY_INDENT if pretty else None)
        return True
    except Exception as e:
        print("Failed to load data", e)
        return False

def load_proj(input: TextIOWrapper):
    bd = base64.b64decode(input.read())
    try:
        jb = gzip.decompress(bd)
        d: list[dict[str, Any]] = json.loads(jb.decode("utf-8"))
        return d[0]
    except Exception as e:
        print("ERROR: Failed to load project", e)
        return None

if __name__ == "__main__":
    main()