Lifesum: unpack iTunes receipts

receipts.py

import base64
import json

def unpack_itunes_receipt(receipt_b64):
    receipt_s = base64.b64decode(receipt_b64).decode('utf8')
    receipt_json = receipt_s.replace('" = "', '": "').replace(';', ',').replace(',\n}', '\n}')
    receipt = json.loads(receipt_json)

    if 'purchase-info' in receipt:
        receipt['purchase-info'] = unpack_itunes_receipt(receipt['purchase-info'])

    return receipt