#!/usr/bin/env python3

"""
Copyright (C) 2017 Assaf Gordon <assafgordon@gmail.com>
License: Simplified BSD (2-clause)


A simple examlpe script of preparing a multipart mime message
(main text + attachments),
and sending it using an SMTP server.
"""

import smtplib, os
from getpass import getuser
from socket import gethostname
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate
from email import encoders
import magic # requires 'python-magic' package


send_from= getuser() + "@" + gethostname()
send_to= ["assafgordon@gmail.com"]
subject="testing 1 2 3"

msg = MIMEMultipart()
msg['From'] = send_from
msg['To'] = COMMASPACE.join(send_to)
msg['Date'] = formatdate(localtime = True)
msg['Subject'] = subject


# First part, attach as inline content
f = "/etc/motd"
text = open(f).read()
msg.attach( MIMEText(text) )


# Other files, store as attachments
files = [
    "/usr/share/pixmaps/debian-logo.png",
    "/bin/sed"
    ]

for f in files:
    # Detect mime type
    mime = magic.from_file(f,mime=True)
    (main,sub) = mime.split("/",2)

    # Read the file, create mime part as 'attachment'
    part = MIMEBase(main,sub)
    part.set_payload( open(f,"rb").read() )
    encoders.encode_base64(part)
    part.add_header('Content-Disposition',
                    'attachment; filename="{0}"'.format(os.path.basename(f)))

    msg.attach(part)


## Print the entire mime message.
## This can be pipe'd into "/usr/sbin/sendmail -t" to be send
## (assuming sendmail is insalled and properly configured)
if True:
    print(msg)


## Send the message by SMTP.
## Can be sent to localhost if exim4/postfix/etc are installed and configured.
## Otherwise, add host/port to the connect() call (and user/password login, too)
if False:
    mailer = smtplib.SMTP()
    mailer.connect()
    mailer.sendmail(send_from, send_to, msg.as_string())
    mailer.quit()