catalogue/management/commands/importlessons.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of EduMed, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 import os
   6 import sys
   7 import time
   8 from optparse import make_option
   9 from django.conf import settings
  10 from django.core.management.base import BaseCommand
  11 from django.core.management.color import color_style
  12 from django.core.files import File
  13
  14 from librarian import IOFile
  15 from catalogue.models import Lesson, Section
  16
  17 #from search import Index
  18
  19
  20 class Command(BaseCommand):
  21     option_list = BaseCommand.option_list + (
  22         make_option('-q', '--quiet', action='store_false', dest='verbose', default=True,
  23             help='Verbosity level; 0=minimal output, 1=normal output, 2=all output'),
  24     )
  25     help = 'Imports lessons from the specified directories.'
  26     args = 'directory [directory ...]'
  27
  28     def import_book(self, file_path, options):
  29         verbose = options.get('verbose')
  30         iofile = IOFile.from_filename(file_path)
  31         basename, ext = file_path.rsplit('.', 1)
  32         if os.path.isdir(basename):
  33             for att_name in os.listdir(basename):
  34                 iofile.attachments[att_name] = IOFile.from_filename(
  35                     os.path.join(basename, att_name))
  36         lesson = Lesson.publish(iofile)
  37
  38     def handle(self, *directories, **options):
  39         from django.db import transaction
  40
  41         self.style = color_style()
  42
  43         verbose = options.get('verbose')
  44
  45         # Start transaction management.
  46         transaction.commit_unless_managed()
  47         transaction.enter_transaction_management()
  48         transaction.managed(True)
  49
  50         files_imported = 0
  51         files_skipped = 0
  52
  53         for dir_name in directories:
  54             if not os.path.isdir(dir_name):
  55                 print self.style.ERROR("%s: Not a directory. Skipping." % dir_name)
  56             else:
  57                 # files queue
  58                 files = sorted(os.listdir(dir_name))
  59                 postponed = {}
  60                 while files:
  61                     file_name = files.pop(0)
  62                     file_path = os.path.join(dir_name, file_name)
  63                     file_base, ext = os.path.splitext(file_path)
  64
  65                     # Skip files that are not XML files
  66                     if not ext == '.xml':
  67                         continue
  68
  69                     if verbose > 0:
  70                         print "Parsing '%s'" % file_path
  71                     else:
  72                         sys.stdout.write('.')
  73                         sys.stdout.flush()
  74
  75                     # Import book files
  76                     try:
  77                         self.import_book(file_path, options)
  78                         files_imported += 1
  79                         transaction.commit()
  80                     except Section.IncompleteError:
  81                         if file_name not in postponed or postponed[file_name] < files_imported:
  82                             # Push it back into the queue, maybe the missing lessons will show up.
  83                             if verbose > 0:
  84                                 print self.style.NOTICE('Waiting for missing lessons.')
  85                             files.append(file_name)
  86                             postponed[file_name] = files_imported
  87                         else:
  88                             # We're in a loop, nothing's being imported - some lesson is really missing.
  89                             raise e
  90                     except BaseException, e:
  91                         print e
  92                         files_skipped += 1
  93
  94         # Print results
  95         print
  96         print "Results: %d files imported, %d skipped, %d total." % (
  97             files_imported, files_skipped, files_imported + files_skipped)
  98         print
  99
 100         transaction.commit()
 101         transaction.leave_transaction_management()