#! /home/tgolden/bin/python2.5
import os, sys
from mailbox import mbox

blacklist_filepath = os.path.join (os.path.expanduser ("~"), ".procmail_blacklist")
mail_root = os.path.join (os.path.expanduser ("~"), "mail")
mailboxes = ['IN-bad']

if os.path.isfile (blacklist_filepath):
  subjects = set (line.strip () for line in open (blacklist_filepath))
else:
  subjects = set ()

for mailbox in mailboxes:
  mailbox_path = os.path.join (mail_root, mailbox)
  if not os.path.isfile (mailbox_path): 
    continue
  
  print "Scanning:", mailbox_path
  mbox = mbox (mailbox_path)
  try:
    while True:
      try:
        key, mail = mbox.popitem ()
      except KeyError:
        break
      else:
        subject = mail['subject']
        if subject:
          subjects.add (subject)
          print "Adding:", subject
  finally:
    mbox.close ()

f = open (blacklist_filepath, "w")
try:
  f.write ("\n".join (subjects))
finally:
  f.close ()