#!/usr/bin/python3

import cerberus
from schwifty import IBAN, BIC
import datetime

def valid_iban(field, value, error):
    try:
        IBAN(value)
        return True
    except ValueError:
        error(field, 'not a valid IBAN')

def valid_bic(field, value, error):
    try:
        BIC(value)
        return True
    except ValueError:
        error(field, 'not a valid BIC')

def iso_date(field, value, error):
    try:
        datetime.datetime.strptime(value, "%Y-%m-%d")
        return True
    except ValueError:
        error(field, 'not a valid IDO 8601 date')

document = {
            'finanzdaten': 
                {
                'bic': 'PBNKDEFFXXX', 
                'holder': '', 
                'iban': 'DE89370400440532013000', 
                'issuance': '2012-01-01', 
                'reference': '0042', 
                'scan-sepa-mandate': ''
                }, 
            'mitgliederdaten': 
                {
                'bis': '', 
                'mitgliedsbeitrag': '30', 
                'scan-antrag': '', 
                'schliessberechtigung': 'Ja', 
                'spendenbeitrag': '', 
                'status': 'V', 
                'von': '2012-01-01'
                }, 
            'stammdaten': 
                {
                'address_code': '39104', 
                'address_country': 'DE', 
                'address_label': 'Max Hackerberg\nLeibnizstr. 32\n39104 Magdeburg', 
                'address_locality': 'Magdeburg', 
                'address_region': '', 
                'address_street': 'Leibnizstr. 32', 
                'birth_date': '1970-01-01', 
                'birth_location': 'Hackstadt', 
                'email': 'max.hackerberg@netz39.de', 
                'fullname': 'Max Hackerberg', 
                'nickname': 'maxH', 
                'pgp-key': '', 
                'ssh-key': ''
                }, 
            'timestamp': '2020-03-25T23:58:11', 
            'id': '6af68'
            }

schema_fin={'bic': {'type': 'string', 'check_with': valid_bic},
            'iban': {'type': 'string', 'check_with': valid_iban},
            'issuance': {'type': 'string', 'check_with': iso_date},
            'reference': {'type': 'string'},
            'scan-sepa-mandate': {'type': 'string'},
            'holder': {'type': 'string'}}

v = cerberus.Validator()
v.validate(document['finanzdaten'], schema_fin)