from io import BytesIO
from typing import Optional

import cv2
from PIL import Image


class Camera:
    capture: cv2.VideoCapture

    def __init__(self):
        self.capture = cv2.VideoCapture(0)

    def get_image(self) -> Optional[bytes]:
        return_code, image = self.capture.read()
        if not return_code:
            return None
        image_rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
        jpg = Image.fromarray(image_rgb)
        byte_stream = BytesIO()
        jpg.save(byte_stream, 'JPEG')
        return bytes(byte_stream.getbuffer())