bulkconv.py

import os
import subprocess


MAGICDICT = {b"GIF8": ".gif", b"\x89PNG": ".png"}


def single_convert(afile):
    with open(afile, "rb") as thefile:
        header = thefile.read(4)
    if header in MAGICDICT.keys():
        os.rename(afile, "{0}{1}".format(afile, MAGICDICT[header]))
    else:
        print(afile, header)


def folder_convert(folder):
    icondir = os.path.join(folder, "icons")
    thumbdir = os.path.join(folder, "thumbnails")
    preview = os.path.join(folder, "icon")
    for icon in os.listdir(icondir):
        single_convert(os.path.join(icondir, icon))
    for thumb in os.listdir(thumbdir):
        single_convert(os.path.join(thumbdir, thumb))
    single_convert(preview)


def magick_convert(folder):
    thumbdir = os.path.join(folder, "thumbnails")
    oldthumbs = [os.path.join(thumbdir, x) for x in os.listdir(thumbdir)]
    newthumbs = [x.replace(".png", ".512.png") for x in oldthumbs]
    for thumb, newthumb in zip(oldthumbs, newthumbs):
        subprocess.run("magick convert -background none -quality 100 -resize 512x512 {0} {1}".format(thumb, newthumb))
    for thumb in oldthumbs:
        os.remove(thumb)
    for thumb, newthumb in zip(oldthumbs, newthumbs):
        os.rename(newthumb, thumb)


def bulk_convert2():
    folders = [os.path.abspath(x) for x in os.listdir() if os.path.isdir(x)]
    for folder in folders:
        print("UPSCALING: {0}".format(folder))
        magick_convert(folder)


def bulk_convert():
    folders = [os.path.abspath(x) for x in os.listdir() if os.path.isdir(x)]
    for folder in folders:
        print("CONVERTING: {0}".format(folder))
        folder_convert(folder)


if __name__ == "__main__":
    bulk_convert()