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     )
  25     help = 'Imports lessons from the specified directories.'
  26     args = 'directory [directory ...]'
  27
  28     def __init__(self):
  29         super(Command, self).__init__()
  30         self.options = None
  31         self.levels = None
  32
  33     @staticmethod
  34     def all_attachments(path):
  35         files = {}
  36
  37         def read_dir(path):
  38             for name in os.listdir(path):
  39                 fullname = os.path.join(path, name)
  40                 if os.path.isdir(fullname):
  41                     read_dir(fullname)
  42                 else:
  43                     f = IOFile.from_filename(fullname)
  44                     files[name.decode('utf-8')] = f
  45                     files.setdefault(name.replace(" ", "").decode('utf-8'), f)
  46
  47         read_dir(path)
  48         return files
  49
  50     @transaction.atomic
  51     def handle(self, *directories, **options):
  52
  53         self.levels = set()
  54
  55         curdir = os.path.abspath(os.curdir)
  56         self.options = options
  57
  58         files_imported = 0
  59         files_skipped = 0
  60
  61         for dir_name in directories:
  62             abs_dir = os.path.join(curdir, dir_name)
  63             if not os.path.isdir(abs_dir):
  64                 print self.style.ERROR("%s: Not a directory. Skipping." % abs_dir)
  65             else:
  66                 files_imported_dir, files_skipped_dir = self.import_from_dir(abs_dir)
  67                 files_imported += files_imported_dir
  68                 files_skipped += files_skipped_dir
  69
  70         if self.levels:
  71             print "Rebuilding level packages:"
  72             for level in self.levels:
  73                 print level.name
  74                 level.build_packages()
  75
  76         # Print results
  77         print
  78         print "Results: %d files imported, %d skipped, %d total." % (
  79             files_imported, files_skipped, files_imported + files_skipped)
  80         print
  81
  82     def import_from_dir(self, abs_dir):
  83         verbose = self.options.get('verbose')
  84         files_imported = 0
  85         files_skipped = 0
  86         att_dir = os.path.join(abs_dir, self.options['attachments'])
  87         attachments = self.all_attachments(att_dir)
  88         # files queue
  89         files = sorted(os.listdir(abs_dir))
  90         postponed = {}
  91         ignore_incomplete = set()
  92         while files:
  93             file_name = files.pop(0)
  94             file_path = os.path.join(abs_dir, file_name)
  95             file_base, ext = os.path.splitext(file_path)
  96
  97             # Skip files that are not XML files
  98             if not ext == '.xml':
  99                 continue
 100
 101             if verbose > 0:
 102                 print "Parsing '%s'" % file_path
 103             else:
 104                 sys.stdout.write('.')
 105                 sys.stdout.flush()
 106
 107             try:
 108                 iofile = IOFile.from_filename(file_path)
 109                 iofile.attachments = attachments
 110                 lesson = Lesson.publish(iofile, file_name in ignore_incomplete)
 111             except Section.IncompleteError:
 112                 if file_name not in postponed or postponed[file_name] < files_imported:
 113                     # Push it back into the queue, maybe the missing lessons will show up.
 114                     if verbose > 0:
 115                         print self.style.NOTICE('Waiting for missing lessons.')
 116                     files.append(file_name)
 117                     postponed[file_name] = files_imported
 118                 elif self.options['ignore_incomplete'] and file_name not in ignore_incomplete:
 119                     files.append(file_name)
 120                     ignore_incomplete.add(file_name)
 121                     postponed[file_name] = files_imported
 122                 else:
 123                     # We're in a loop, nothing's being imported - some lesson is really missing.
 124                     raise
 125             except BaseException:
 126                 import traceback
 127                 traceback.print_exc()
 128                 files_skipped += 1
 129             else:
 130                 files_imported += 1
 131                 if hasattr(lesson, 'level'):
 132                     self.levels.add(lesson.level)
 133             finally:
 134                 if verbose > 0:
 135                     print
 136         return files_imported, files_skipped