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#!/usr/bin/python
import email
import imaplib
import logging
import os.path
import subprocess
from ConfigParser import ConfigParser
logging.basicConfig(format='%(levelname)s:%(funcName)s:%(message)s',
                    level=logging.DEBUG)

CMD_STR = "/usr/bin/bogofilter -%s"
imaplib.Debug = 4

def process_folder(proc_fld_name, bogofilter_param, end_fld_name):
    client.select(proc_fld_name)
    _, resp = client.search(None, "ALL")
    messages = resp[0].split()
    logging.debug('messages = {0}'.format(messages))
    proc_msg_count = 0

    for msgId in messages:
        logging.debug('msgId = {0}'.format(msgId))
        typ, msg_data = client.fetch(msgId, '(RFC822)')

        msg = hparser.parsestr(msg_data[0][1])

        ret = subprocess.Popen(CMD_STR % bogofilter_param,
                               stdin=subprocess.PIPE,
                               shell=True)
        ret.communicate(input=msg_data[0][1])

        logging.debug("ret.returncode = %s", ret.returncode)
        if ret.returncode == 0:
            del msg['X-Bogosity']
            typ, _ = client.append(end_fld_name, '', '',
                                   msg.as_string(True))
            logging.debug("typ = %s", typ)
            if typ != 'OK':
                raise IOError("Cannot store a message to the folder %s"
                              % end_fld_name)
            else:
                client.store(msgId, '+FLAGS', r'(\Deleted)')
                proc_msg_count += 1
        else:
            raise OSError("bogofilter finished with the returncode: %d"
                          % ret)

    client.expunge()
    client.close()

    return proc_msg_count

processedCounter = 0
hparser = email.Parser.Parser()
config = ConfigParser()
config.read(os.path.expanduser("~/.bogofilter-imap-train-rc"))

login = config.get("imap-training", "login")
password = config.get("imap-training", "password")
server = config.get("imap-training", "server")
client = imaplib.IMAP4_SSL(server)
client.login(login, password)

for box in [('Spam', 's', 'Deleted Items'), ('Ham', 'n', 'INBOX')]:
    logging.debug('box = {0}'.format(box))
    processedCounter += process_folder(box[0], box[1], box[2])

client.logout()

if processedCounter > 0:
    logging.info("Processed %d spam messages.", processedCounter)