usbtan-viaclipboard

#!/usr/bin/env python3
# encoding: utf-8

import re
import sys
import pyperclip
import subprocess
import gi
gi.require_version('Notify', '0.7')
from gi.repository import Notify
Notify.init("chipTAN USB")
summary = 'Anfrage für TAN'
# from https://www.devdungeon.com/content/desktop-notifications-linux-python

TIMEOUT_SECONDS = 30

if __name__ == '__main__':
    clipboard = pyperclip.paste()
    iban = re.search(r'[A-Z]{2}[0-9]{20}', clipboard.replace(' ',''))
    startcode = re.search(r'\b[0-9]{8}\b', clipboard)
    betrag = re.search(r'\b[0-9.]+,[0-9]{2}\b', clipboard)
    sys.stderr.write(f'clibpoard: {clipboard}\n')
    sys.stderr.write(f'startcode: {startcode}\n')
    sys.stderr.write(f'IBAN: {iban}\n')
    sys.stderr.write(f'Betrag: {betrag}\n')
    if (iban):
        iban = iban.group(0)[-10:]
    if (betrag):
        betrag = betrag.group(0).replace('.','') # tausender Trennzeichen entfernen
    if (startcode and startcode.group(0)):
        startcode = startcode.group(0)
        
        body = f'Startcode: {startcode}\nIBAN: {iban}\nBetrag: {betrag}\n\nBitte am SmartCard Lesegerät innerhalb von {TIMEOUT_SECONDS} Sekunden bestätigen.'
        icon = 'dialog-password'
        notification = Notify.Notification.new(summary, body, icon)
        notification.show()
        
        arguments = [startcode, iban, betrag]
        arguments = [a for a in arguments if a]
        try:
            sub = subprocess.run(['usbtan-cli']+arguments, stdout=subprocess.PIPE, timeout= 30, check=True, encoding='ascii')
            tokens = [line.split(' = ') for line in sub.stdout.split('\n')]
            tantoken = [token for token in tokens if len(token) == 2 and token[0] == 'TAN']
            if tantoken:
                tan = tantoken[0][1]
                pyperclip.copy(tan)
                body = f'TAN {tan} wurde in Zwischenablage kopiert.'
                icon = 'dialog-information'
                notification.update(summary, body, icon)
                notification.show()
        except subprocess.CalledProcessError:
            body = 'SmartCard Lesegerät konnte keine TAN liefern.'
            icon = 'dialog-error'
            notification.update(summary, body, icon)
            notification.show()
        except subprocess.TimeoutExpired:
            body = 'Keine rechtzeitige Antwort vom SmartCard Lesegerät.'
            icon = 'dialog-error'
            notification.update(summary, body, icon)
            notification.show()
    else:
        body = 'Nicht möglich: Kein Startcode in Zwischenablage erkannt.'
        icon = 'dialog-error'
        notification = Notify.Notification.new(summary, body, icon)
        notification.show()