Embed reader into PoolPay's CardReader framework

from collections.abc import Callable, Sequence

import RPi.GPIO as GPIO

from mfrc522 import SimpleMFRC522

from poolpay.card.CardReader import CardReader

def split_to_bytes(value: int) -> Sequence[int]:

    """

    Take an int and split it into a big endian representation of individual bytes.

    >>> split = split_to_bytes(0xcafebabe)

    >>> [hex(i) for i in split]

    [0xca, 0xfe, 0xba, 0xbe]

    """

    split = []

    while value:

        # Get the byte at the smallest position

        smallest_byte = value & 0xFF

        split.append(smallest_byte)

        # Shift the value one byte to the right

        value = value >> 8

    # We need to reverse the list to achieve big endianness

    return split[::-1]

class Mfrc522CardReader(CardReader):

    def __init__(self) -> None:

        self._reader = SimpleMFRC522()

    def read_id(self) -> Sequence[int]:

        card_id, content = self._reader.read()

        return split_to_bytes(card_id)

    def on_card_presented(self, handle_card: Callable[[CardReader], None]) -> None:

        raise NotImplementedError()

    def close(self) -> None:

        # TODO Maybe integrate this better

        GPIO.cleanup()

#!/usr/bin/env python

import RPi.GPIO as GPIO

from mfrc522 import SimpleMFRC522

reader = SimpleMFRC522()

try:

    id, content = reader.read()

    print("Id", id)

    print("Id (hex)", hex(id))

    print("Content", content)

finally:

    GPIO.cleanup()