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         make_option('-a', '--attachments', dest='attachments', metavar="PATH", default='materialy',
  25             help='Attachments dir path.'),
  26         make_option('--ignore-incomplete', action='store_true', dest='ignore_incomplete', default=False,
  27             help='Attachments dir path.'),
  28     )
  29     help = 'Imports lessons from the specified directories.'
  30     args = 'directory [directory ...]'
  31
  32     def import_book(self, file_path, options, attachments, ignore_incomplete=False):
  33         verbose = options.get('verbose')
  34         iofile = IOFile.from_filename(os.path.join(self.curdir, file_path))
  35         iofile.attachments = attachments
  36         return Lesson.publish(iofile, ignore_incomplete)
  37
  38     @staticmethod
  39     def all_attachments(path):
  40         files = {}
  41
  42         def read_dir(path):
  43             for name in os.listdir(path):
  44                 fullname = os.path.join(path, name)
  45                 if os.path.isdir(fullname):
  46                     read_dir(fullname)
  47                 else:
  48                     f = IOFile.from_filename(fullname)
  49                     files[name] = f
  50                     files.setdefault(name.replace(" ", ""), f)
  51
  52         read_dir(path)
  53         return files
  54
  55
  56     def handle(self, *directories, **options):
  57         from django.db import connection, transaction
  58
  59         levels = set()
  60         self.style = color_style()
  61
  62         verbose = options.get('verbose')
  63         self.curdir = os.path.abspath(os.curdir)
  64
  65
  66         # Start transaction management.
  67         # SQLite will choke on generating thumbnails
  68         use_transaction = not connection.features.autocommits_when_autocommit_is_off
  69         if use_transaction:
  70             transaction.commit_unless_managed()
  71             transaction.enter_transaction_management()
  72             transaction.managed(True)
  73         else:
  74             print 'WARNING: Not using transaction management.'
  75
  76         files_imported = 0
  77         files_skipped = 0
  78
  79         for dir_name in directories:
  80             abs_dir = os.path.join(self.curdir, dir_name)
  81             if not os.path.isdir(abs_dir):
  82                 print self.style.ERROR("%s: Not a directory. Skipping." % abs_dir)
  83             else:
  84                 att_dir = os.path.join(abs_dir, options['attachments'])
  85                 attachments = self.all_attachments(att_dir)
  86
  87                 # files queue
  88                 files = sorted(os.listdir(abs_dir))
  89                 postponed = {}
  90                 ignore_incomplete = set()
  91                 while files:
  92                     file_name = files.pop(0)
  93                     file_path = os.path.join(abs_dir, file_name)
  94                     file_base, ext = os.path.splitext(file_path)
  95
  96                     # Skip files that are not XML files
  97                     if not ext == '.xml':
  98                         continue
  99
 100                     if verbose > 0:
 101                         print "Parsing '%s'" % file_path
 102                     else:
 103                         sys.stdout.write('.')
 104                         sys.stdout.flush()
 105
 106                     # Import book files
 107                     try:
 108                         lesson = self.import_book(file_path, options, attachments,
 109                                     ignore_incomplete=file_name in ignore_incomplete)
 110                     except Section.IncompleteError, e:
 111                         if file_name not in postponed or postponed[file_name] < files_imported:
 112                             # Push it back into the queue, maybe the missing lessons will show up.
 113                             if verbose > 0:
 114                                 print self.style.NOTICE('Waiting for missing lessons.')
 115                             files.append(file_name)
 116                             postponed[file_name] = files_imported
 117                         elif options['ignore_incomplete'] and file_name not in ignore_incomplete:
 118                             files.append(file_name)
 119                             ignore_incomplete.add(file_name)
 120                             postponed[file_name] = files_imported
 121                         else:
 122                             # We're in a loop, nothing's being imported - some lesson is really missing.
 123                             raise e
 124                     except BaseException, e:
 125                         import traceback
 126                         traceback.print_exc()
 127                         files_skipped += 1
 128                     else:
 129                         files_imported += 1
 130                         if use_transaction:
 131                             transaction.commit()
 132                         if hasattr(lesson, 'level'):
 133                             levels.add(lesson.level)
 134                     finally:
 135                         if verbose > 0:
 136                             print
 137
 138
 139         if levels:
 140             print "Rebuilding level packages:"
 141             for level in levels:
 142                 print level.name
 143                 level.build_packages()
 144
 145         # Print results
 146         print
 147         print "Results: %d files imported, %d skipped, %d total." % (
 148             files_imported, files_skipped, files_imported + files_skipped)
 149         print
 150
 151         if use_transaction:
 152             transaction.commit()
 153             transaction.leave_transaction_management()