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from random import choices
from string import ascii_lowercase, digits
from os import listdir, remove
from os.path import isfile, join
from typing import List
from PIL import Image
from pillow_heif import HeifImagePlugin
RANDOM_STRING_LENGTH = 4
DEFAULT_CONVERT_FROM_EXT = ".heic"
DEFAULT_CONVERT_TO_EXT = ".png"
SUFFIX_SEPERATOR = "_"
def generate_random_string(length=RANDOM_STRING_LENGTH):
return ''.join(choices(ascii_lowercase + digits, k=length))
# if dest is not a file then it is valid so returns True
def validate_dest(dest):
return not isfile(dest)
# predicts the length of the list ls would return
def ls_size(_dir, recurse=False, extension_filter=DEFAULT_CONVERT_FROM_EXT):
size = 0
_files = [join(_dir, f) for f in listdir(_dir)]
for f in _files:
if isfile(f):
if f.lower().endswith(extension_filter):
size += 1
else:
if recurse:
size += ls_size(join(_dir, f), recurse)
return size
# returns all files with names ending with extension_filter
# can do both top level and recursive
def ls(_dir, recurse=False, extension_filter=DEFAULT_CONVERT_FROM_EXT) -> List[str]:
files = []
_files = [join(_dir, f) for f in listdir(_dir)]
for f in _files:
if isfile(f):
files.append(f)
else:
if recurse:
files += ls(join(_dir, f), recurse)
return [f for f in files if f.lower().endswith(extension_filter)]
def build_dest_path(src, suffix="", from_ext=DEFAULT_CONVERT_FROM_EXT, to_ext=DEFAULT_CONVERT_TO_EXT):
# at first suffix is empty string so file name is
# same just different extension
dest = f"{src[:-len(from_ext)]}{suffix}{to_ext}"
if validate_dest(dest):
return dest
else:
# if using a random suffix prepend it with a seperator
if suffix == "":
suffix += SUFFIX_SEPERATOR
# will keep making suffix longer until file name is accepted
suffix += generate_random_string()
return build_dest_path(src, suffix, from_ext, to_ext)
# receives validated dest
def convert(src, dest):
i = Image.open(src)
i.save(dest)
def process_dir(_dir, recurse=False, delete_original=False):
files = ls(_dir, recurse)
for f in files:
convert(f, build_dest_path(f))
if delete_original:
remove(f)
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