from io import BytesIO
from PIL import Image
import base64


# Reducing the size of an artwork/image (PNG to JPEG)  and base64-encode it.
# imagepath     = full file image path
# expectedsize  = medium or thumbnail
def reduceart(imagepath, expectedsize):
    image = Image.open(imagepath)
    rgb_image = image.convert("RGB")
    with BytesIO() as f:
        rgb_image.save(f, format="JPEG")
        f.seek(0)

        if expectedsize == 'thumbnail':
            rgb_image.thumbnail([90,90])
            rgb_image.save(f, format="JPEG")
            f.seek(0)
        return base64.b64encode(f.getvalue()).decode()