#!/usr/bin/python

'''
## Description

A script to get mail from staff-questions@example.com and resend it anonymously to
ACME Management

## Installation Instructions

* Upload the script in */usr/local/sbin/anon_mail.py*.
* Add the following line in */etc/aliases*:
```
staff-question: "|/usr/local/sbin/anon_mail.py"
```
* Run the `newaliases` command.
'''

import sys
import email
import smtplib

DEBUG = 0
MAIL_SERVER = 'localhost'
if DEBUG:
    TO = ["dev@example.com"]
else:
    TO = ["board@example.com", "ceo@example.com", "cto@example.com"]


def main():
    '''
    Main Function
    '''

    raw_msg = ''
    for line in sys.stdin:
        raw_msg = raw_msg + line

    msg = email.message_from_string(raw_msg)

    if DEBUG:
        filename = "/tmp/msg-before.out"
        out = open(filename, 'w')
        out.write(msg.as_string())


    if msg['Reply-To']:
        msg.__delitem__('Reply-To')

    if msg['Received']:
        msg.__delitem__('Received')

    if msg['Return-Path']:
        msg.replace_header('Return-Path', None)

    if msg['X-Virus-Scanned']:
        msg.__delitem__('X-Virus-Scanned')

    if msg['DKIM-Signature']:
        msg.__delitem__('DKIM-Signature')

    if msg['Message-ID']:
        msg.__delitem__('Message-ID')

    if msg['User-Agent']:
        msg.__delitem__('User-Agent')

    if msg['From']:
        msg.replace_header('From', 'Anonymous Staff <noreply@puri.sm>')

    send_mail = smtplib.SMTP('localhost')
    send_mail.sendmail(msg['From'], TO, msg.as_string())
    send_mail.quit()

    if DEBUG:
        filename = "/tmp/msg-after.out"
        out = open(filename, 'w')
        out.write(msg.as_string())

if __name__ == "__main__":
    main()