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 from optparse import make_option
   8
   9 from django.core.management.base import BaseCommand
  10 from django.db import transaction
  11
  12 from catalogue.models import Lesson, Section
  13 from librarian import IOFile
  14
  15
  16 class Command(BaseCommand):
  17     option_list = BaseCommand.option_list + (
  18         make_option('-q', '--quiet', action='store_false', dest='verbose', default=True,
  19                     help='Verbosity level; 0=minimal output, 1=normal output, 2=all output'),
  20         make_option('-a', '--attachments', dest='attachments', metavar="PATH", default='materialy',
  21                     help='Attachments dir path.'),
  22         make_option('--ignore-incomplete', action='store_true', dest='ignore_incomplete', default=False,
  23                     help='Attachments dir path.'),
  24         make_option('--dont-repackage', action='store_false', dest='repackage', default=True,
  25                     help='Don\'t refresh level packages.'),
  26     )
  27     help = 'Imports lessons from the specified directories.'
  28     args = 'directory [directory ...]'
  29
  30     def __init__(self):
  31         super(Command, self).__init__()
  32         self.options = None
  33         self.levels = None
  34
  35     @staticmethod
  36     def all_attachments(path):
  37         files = {}
  38         if not os.path.isdir(path):
  39             return files
  40
  41         def read_dir(path):
  42             for name in os.listdir(path):
  43                 fullname = os.path.join(path, name)
  44                 if os.path.isdir(fullname):
  45                     read_dir(fullname)
  46                 else:
  47                     f = IOFile.from_filename(fullname)
  48                     files[name.decode('utf-8')] = f
  49                     files.setdefault(name.replace(" ", "").decode('utf-8'), f)
  50
  51         read_dir(path)
  52         return files
  53
  54     @transaction.atomic
  55     def handle(self, *directories, **options):
  56
  57         repackage = options.get('repackage')
  58
  59         self.levels = set()
  60
  61         curdir = os.path.abspath(os.curdir)
  62         self.options = options
  63
  64         files_imported = 0
  65         files_skipped = 0
  66
  67         for dir_name in directories:
  68             abs_dir = os.path.join(curdir, dir_name)
  69             if not os.path.isdir(abs_dir):
  70                 print self.style.ERROR("%s: Not a directory. Skipping." % abs_dir)
  71             else:
  72                 files_imported_dir, files_skipped_dir = self.import_from_dir(abs_dir)
  73                 files_imported += files_imported_dir
  74                 files_skipped += files_skipped_dir
  75
  76         if self.levels and repackage:
  77             print "Rebuilding level packages:"
  78             for level in self.levels:
  79                 print level.name
  80                 level.build_packages()
  81
  82         # Print results
  83         print
  84         print "Results: %d files imported, %d skipped, %d total." % (
  85             files_imported, files_skipped, files_imported + files_skipped)
  86         print
  87
  88     def import_from_dir(self, abs_dir):
  89         verbose = self.options.get('verbose')
  90         files_imported = 0
  91         files_skipped = 0
  92         att_dir = os.path.join(abs_dir, self.options['attachments'])
  93         attachments = self.all_attachments(att_dir)
  94         # files queue
  95         files = sorted(os.listdir(abs_dir))
  96         postponed = {}
  97         ignore_incomplete = set()
  98         while files:
  99             file_name = files.pop(0)
 100             file_path = os.path.join(abs_dir, file_name)
 101             file_base, ext = os.path.splitext(file_path)
 102
 103             if os.path.isdir(file_path):
 104                 dir_imported, dir_skipped = self.import_from_dir(file_path)
 105                 files_imported += dir_imported
 106                 files_skipped += files_skipped
 107                 continue
 108
 109             # Skip files that are not XML files
 110             if not ext == '.xml':
 111                 continue
 112
 113             if verbose > 0:
 114                 print "Parsing '%s'" % file_path
 115             else:
 116                 sys.stdout.write('.')
 117                 sys.stdout.flush()
 118
 119             try:
 120                 iofile = IOFile.from_filename(file_path)
 121                 iofile.attachments = attachments
 122                 lesson = Lesson.publish(iofile, file_name in ignore_incomplete)
 123             except Section.IncompleteError:
 124                 if file_name not in postponed or postponed[file_name] < files_imported:
 125                     # Push it back into the queue, maybe the missing lessons will show up.
 126                     if verbose > 0:
 127                         print self.style.NOTICE('Waiting for missing lessons.')
 128                     files.append(file_name)
 129                     postponed[file_name] = files_imported
 130                 elif self.options['ignore_incomplete'] and file_name not in ignore_incomplete:
 131                     files.append(file_name)
 132                     ignore_incomplete.add(file_name)
 133                     postponed[file_name] = files_imported
 134                 else:
 135                     # We're in a loop, nothing's being imported - some lesson is really missing.
 136                     raise
 137             except BaseException:
 138                 import traceback
 139                 traceback.print_exc()
 140                 files_skipped += 1
 141             else:
 142                 files_imported += 1
 143                 if hasattr(lesson, 'level'):
 144                     self.levels.add(lesson.level)
 145             finally:
 146                 if verbose > 0:
 147                     print
 148         return files_imported, files_skipped