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#! /usr/bin/env python

import ConfigParser
import urllib
import datetime
import email
import email.parser
import imaplib
import os
import os.path
import requests
import string
import subprocess
import sys
import tempfile
import time
import shutil

import optparse

parser = optparse.OptionParser()
parser.add_option('--config', dest='config', default='ocrloader.ini')
(options, args) = parser.parse_args()

config_filepath = options.config


import logging
logging.basicConfig(level=logging.DEBUG)
def process(cfg, filename, payload, enable_ocr=True):
    ocr_filename = os.path.join(cfg.get('ocrized_directory'), filename)
    if not enable_ocr:
        if not os.path.exists(ocr_filename):
            print >> sys.stderr, '  skipping OCR phase'
            fd = file(ocr_filename, 'w')
            fd.write(payload)
            fd.close()

    if not os.path.exists(ocr_filename) and enable_ocr:
        fd, tmpfilename = tempfile.mkstemp(suffix='.pdf', prefix='ocrloader-')
        os.write(fd, payload)
        os.close(fd)
        print >> sys.stderr, '  running OCR on file'
        os.system('abbyyocr9 -rl French -if %s -f PDF -pem ImageOnText -pfpr 150 -pfq 100 -of %s' % \
                        (tmpfilename, ocr_filename))
        if not os.path.exists(ocr_filename):
            print >> sys.stderr, 'failed to OCR %s' % filename
            file('/tmp/' + filename, 'w').write(payload) # keep it for inspection
            return False

    if cfg.get('store_path'):
        print '  storing file locally'
        shutil.copy(ocr_filename, os.path.join(cfg.get('store_path'), filename))
        return True
    else:
        print '  uploading file'
        now = datetime.datetime.now()
        title = string.Template(cfg.get('title')).substitute(
                {'date': now.strftime('%d/%m/%Y'),
                 'time': now.strftime('%H:%M')})
        t = subprocess.call(['curl', '-v', '--insecure', '-X', 'POST',
                  '-F', 'form.widgets.file=@%s;filename=%s;type=application/pdf' % (ocr_filename, filename),
                  '-F', 'form.buttons.import=Import',
                  '-F', 'form.widgets.portal_type=%s' % cfg.get('default_type'),
                  '-F', 'form.widgets.location=%s' % cfg.get('default_directory'),
                  '-F', 'form.widgets.owner=%s' % cfg.get('user'),
                  '-F', 'form.widgets.treating_group=%s' % cfg.get('treating_group'),
                  '-F', 'form.widgets.title=%s' % title,
                  '-u', 'admin:admin',
                  '%s/@@fileimport' % cfg.get('ged_base_url'),]
        return (t == 0)


#    try:
#        r = requests.post(cfg.get('ged_base_url') + '/@@fileimport',
#            auth=(cfg.get('ged_username'), cfg.get('ged_password')),
#            verify=False,
#            proxies={'https': 'http://172.23.3.30:3128'},
#            files={'form.widgets.file': (filename, file(ocr_filename))},
#            data={'form.buttons.import': 'Import',
#                  'form.widgets.portal_type': cfg.get('default_type'),
#                  'form.widgets.location': cfg.get('default_directory'),
#                  'form.widgets.owner': cfg.get('user'),
#                 })
#    except Exception, e:
#        print e
#        return False
#
#    if r.status_code != requests.codes.ok:
#        file('/tmp/error.html', 'w').write(r.text)
#    return (r.status_code == requests.codes.ok)


while True:
    cfg = ConfigParser.ConfigParser()
    cfg.read(config_filepath)
    for section in cfg.sections():
        print 'processing', section
        imap_server = cfg.get(section, 'imap_server')
        ssl = cfg.getboolean(section, 'ssl')
        ged_base_url = cfg.get(section, 'ged_base_url')

        try:
            if ssl:
                M = imaplib.IMAP4_SSL(host=imap_server)
            else:
                M = imaplib.IMAP4(host_imap_server)
        except:
            print 'failed to connect to imap server'
            time.sleep(30)
            continue
        try:
            M.login(section, cfg.get(section, 'password'))
        except imaplib.IMAP4.error:
            continue
        M.select()
        typ, data = M.search(None, '(NOT SEEN)')
        for num in data[0].split():
            typ, data = M.fetch(num, '(RFC822)')
            msg = email.parser.Parser().parsestr(data[0][1])
            enable_ocr = True
            if 'disable_ocr' in msg['Subject']:
                enable_ocr = False
            for part in msg.walk():
                if part.get_content_type() == 'application/pdf':
                    filename = part.get_filename()
                    print '  handling', filename
                    payload = part.get_payload(decode=True)
                    if not process(dict(cfg.items(section)), filename, payload, enable_ocr):
                        print '  error -> marking as unseen'
                        M.store(num, '-FLAGS', r'\Seen')
                    break
        M.close()
        M.logout()

    print 'waiting a bit', time.strftime('%Y-%m-%d %H:%M:%S')
    time.sleep(30)