#!/usr/bin/python

###################################################
# Pipe Messages v1.0
# Copyright (c) 2005 S. Alexander Jacobson.  All Rights Reserved
###################################################

"""
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
"""

import email
import email.Errors
import mailbox
import os
import sys

def msgfactory(fp):
    try: return email.message_from_file(fp)
    except email.Errors.MessageParseError:
	return ''

def pipe(msg,cmd):
    (childIn,childOut)=os.popen4(cmd)
    childIn.write(str(msg))
    childIn.close()
    print childOut.read()
    childOut.close()

def main():
    if len(sys.argv) < 3:
        usage()
        return
    folder=sys.argv[1]
    target=sys.argv[2]
    fp=1
    try: fp=open(folder,"rb")
    except: return
    mbox = mailbox.PortableUnixMailbox(fp, msgfactory)
    skip=mbox.next() #imap placeholder object
    for msg in mbox: pipe(msg,target)
    fp.close()
    fp=open(folder,"wb")
    fp.write(str(skip))
    fp.close()
    #os.remove(folder)

def usage():
    print """
    usage: pipeMsg.py folder target
    e.g.
    
      $ pipeMsg.py myFolder "wc -l"

    Will show the length of every message in your inbox
    """
main()