exec-notify/execNotify

#!/usr/bin/env python3
from sys import argv
import socket
from typing import List

from execNotifyDir import exec, config, mail


def main():
    prevMailError = checkPrevError()

    if len(argv) >= 2:
        success = executeCommand(argv[1:])
    else:
        success = True

    if prevMailError:
        tryToInform()

    if not success:
        exit(1)
    else:
        exit(0)


def executeCommand(command: List) -> bool:
    keys = ['command', 'status', 'stderr', 'stdout']
    code, stdout, stderr = exec.execute(command)
    values = [str(command), str(code), stderr, stdout]

    BODY = ''
    for key, value in zip(keys, values):
        BODY += '=== {} ===\n{}\n'.format(key, value)
    print(BODY)

    if code != 0:
        hostname = socket.gethostname()

        SUBJECT = '{} | {}'.format(hostname, str(command))
        mail.sendMailOrWriteToFile(SUBJECT=SUBJECT, BODY=BODY)

        return False
    else:
        return True


def checkPrevError():
    return config.getErrorFile().exists()


def tryToInform():
    """
    Try to inform user via mail about previous error(s) that could not be sent to him before.
    Maybe this time sending of an email works ;)
    """

    SUBJECT = '{} | Some mails not sent!'.format(socket.gethostname())
    BODY = 'Please check the file {} for mails which could previously not be sent to you!\n' \
           'Note: You may delete the file after reading it ;)'.format(
        config.getErrorFile())
    mail.sendMail(SUBJECT=SUBJECT, BODY=BODY)


if __name__ == '__main__':
    main()