import cv2
import numpy

from pathlib import Path
from scandir import scandir

image_extensions = [".jpg", ".jpeg", ".png"]

def get_folder(path):
    output_dir = Path(path)
    # output_dir.mkdir(parents=True, exist_ok=True)
    return output_dir


def get_image_paths(directory):
    return [x.path for x in scandir(directory) if
     any(map(lambda ext: x.name.lower().endswith(ext), image_extensions))]


def load_images(image_paths, convert=None):
    iter_all_images = (cv2.imread(fn) for fn in image_paths)
    if convert:
        iter_all_images = (convert(img) for img in iter_all_images)
    for i, image in enumerate(iter_all_images):
        if i == 0:
            all_images = numpy.empty((len(image_paths), ) + image.shape, dtype=image.dtype)
        all_images[i] = image
    return all_images