#!/usr/bin/python

"""
mailer

This program reads in a list of file names and creates a multi-part MIME mail
message, then mails it to a specified recipient, via the specified mail host.
If no recipient is specified, mail is sent to yourself. If no mailhost is
specified, use localhost.

Usage: mailer [<arguments>] <file> ...

 [ -t | --to        ]  Send the message to this recipient [yourself].
                       This value may be a comma separated list for multiple
                       recipients. This is most efficient method for multiple
                       receivers.
 [ -l | --list      ]  read in the named file as a list of recipients, one per
                       line. The file may contain comments with "#".
 [ -f | --from      ]  Mail marked as being FROM this address [user@hostname].
 [ -m | --mailhost  ]  Send SMTP to this mailhost [localhost].
 [ -s | --subject   ]  Set the Subject line. [No Subject]
 [ -d | --debug     ]  print some verbose debug messages.
 [ -V | --version   ]  Display program version.
 [ -h | -? | --help ]  Display this usage message.

The MIME type is taken from the file's extension. Make sure that the files you
send have a valid extension, and that your mime.types file is valid.  Plain
text files (.txt) will be sent un-encoded, all other files will be base64
encoded. 

"""

import sys, os, pwd
import getopt, string
from cStringIO import StringIO
from smtplib import SMTP

from mailerlib import *

revision = "$Id: $"
shortArgs = "f:t:m:l:s:Vd?h"
longArgs = [ "help", "version", "mailhost=", "from=", "to=", "list=", 
		"subject=", "debug" ]

# defaults
debug = 0
smtphost = "localhost"
subject = "No subject"
fromaddr = pwd.getpwuid(os.getuid())[0] + "@" + os.uname()[1]
toaddrs = []

#  process options
optlist, sys.argv[1:] = getopt.getopt(sys.argv[1:], shortArgs, longArgs)
for arg in optlist:
	if arg[0] == "-h" or arg[0] == "-?" or arg[0] == "--help":
		print __doc__
		sys.exit(0)
	if arg[0] == "-V" or arg[0] == "--version":
		print "Version: ", revision
		sys.exit(0)
	if arg[0] == "-d" or arg[0] == "--debug":
		debug = 1
	if arg[0] == "-m" or arg[0] == "--mailhost":
		smtphost = arg[1]
	if arg[0] == "-f" or arg[0] == "--from":
		fromaddr = arg[1]
	if arg[0] == "-t" or arg[0] == "--to":
		for clist in string.split(arg[1], ","):
			toaddrs.append(clist)
	if arg[0] == "-l" or arg[0] == "--list":
		for clist in read_to_list(arg[1]):
			toaddrs.append(clist)
	if arg[0] == "-s" or arg[0] == "--subject":
		subject = arg[1]

# default recipient is yourself (gotta send it somewhere...)
if toaddrs == []:
	toaddrs = [pwd.getpwuid(os.getuid())[0]]

# *** Start of main program
if debug:
	print "Would send message from ", fromaddr
	print "with these files attached: "
	for file in sys.argv[1:]:
		print "  ", file
	print "\nTo these recipients:"
	for to in toaddrs:
		print "   ", to
	print "\nvia this host: ", smtphost
else:
	if len(sys.argv[1:]) == 0:
		print "Error: no files to send. Use -h for help."
		sys.exit(1)
	# buld message in memory, then mail it via SMTP
	outputfp = StringIO()
	build_message(outputfp, sys.argv[1:], subject)
	# now send the email message using built-in SMTP
	maildest = SMTP(smtphost)
	maildest.sendmail(fromaddr, toaddrs, outputfp.getvalue())
	maildest.quit()
	outputfp.close()