+++ /dev/null
-# -*- coding: utf-8 -*-
-# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-import json
-from collections import namedtuple
-from django.db import models
-from django.utils.translation import ugettext_lazy as _
-from django.utils.datastructures import SortedDict
-import jsonfield
-from catalogue.fields import OverwritingFileField
-from catalogue.utils import book_upload_path
-
-
-class BookMedia(models.Model):
- """Represents media attached to a book."""
- FileFormat = namedtuple("FileFormat", "name ext")
- formats = SortedDict([
- ('mp3', FileFormat(name='MP3', ext='mp3')),
- ('ogg', FileFormat(name='Ogg Vorbis', ext='ogg')),
- ('daisy', FileFormat(name='DAISY', ext='daisy.zip')),
- ])
- format_choices = [(k, _('%s file') % t.name)
- for k, t in formats.items()]
-
- type = models.CharField(_('type'), db_index=True, choices=format_choices, max_length="100")
- name = models.CharField(_('name'), max_length="100")
- file = OverwritingFileField(_('file'), upload_to=book_upload_path())
- uploaded_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False, db_index=True)
- extra_info = jsonfield.JSONField(_('extra information'), default={}, editable=False)
- book = models.ForeignKey('Book', related_name='media')
- source_sha1 = models.CharField(null=True, blank=True, max_length=40, editable=False)
-
- def __unicode__(self):
- return "%s (%s)" % (self.name, self.file.name.split("/")[-1])
-
- class Meta:
- ordering = ('type', 'name')
- verbose_name = _('book media')
- verbose_name_plural = _('book media')
- app_label = 'catalogue'
-
- def save(self, *args, **kwargs):
- from fnpdjango.utils.text.slughifi import slughifi
- from catalogue.utils import ExistingFile, remove_zip
-
- try:
- old = BookMedia.objects.get(pk=self.pk)
- except BookMedia.DoesNotExist:
- old = None
- else:
- # if name changed, change the file name, too
- if slughifi(self.name) != slughifi(old.name):
- self.file.save(None, ExistingFile(self.file.path), save=False, leave=True)
-
- super(BookMedia, self).save(*args, **kwargs)
-
- # remove the zip package for book with modified media
- if old:
- remove_zip("%s_%s" % (old.book.slug, old.type))
- remove_zip("%s_%s" % (self.book.slug, self.type))
-
- extra_info = self.extra_info
- if isinstance(extra_info, basestring):
- # Walkaround for weird jsonfield 'no-decode' optimization.
- extra_info = json.loads(extra_info)
- extra_info.update(self.read_meta())
- self.extra_info = extra_info
- self.source_sha1 = self.read_source_sha1(self.file.path, self.type)
- return super(BookMedia, self).save(*args, **kwargs)
-
- def read_meta(self):
- """
- Reads some metadata from the audiobook.
- """
- import mutagen
- from mutagen import id3
-
- artist_name = director_name = project = funded_by = ''
- if self.type == 'mp3':
- try:
- audio = id3.ID3(self.file.path)
- artist_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE1'))
- director_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE3'))
- project = ", ".join([t.data for t in audio.getall('PRIV')
- if t.owner=='wolnelektury.pl?project'])
- funded_by = ", ".join([t.data for t in audio.getall('PRIV')
- if t.owner=='wolnelektury.pl?funded_by'])
- except:
- pass
- elif self.type == 'ogg':
- try:
- audio = mutagen.File(self.file.path)
- artist_name = ', '.join(audio.get('artist', []))
- director_name = ', '.join(audio.get('conductor', []))
- project = ", ".join(audio.get('project', []))
- funded_by = ", ".join(audio.get('funded_by', []))
- except:
- pass
- else:
- return {}
- return {'artist_name': artist_name, 'director_name': director_name,
- 'project': project, 'funded_by': funded_by}
-
- @staticmethod
- def read_source_sha1(filepath, filetype):
- """
- Reads source file SHA1 from audiobok metadata.
- """
- import mutagen
- from mutagen import id3
-
- if filetype == 'mp3':
- try:
- audio = id3.ID3(filepath)
- return [t.data for t in audio.getall('PRIV')
- if t.owner=='wolnelektury.pl?flac_sha1'][0]
- except:
- return None
- elif filetype == 'ogg':
- try:
- audio = mutagen.File(filepath)
- return audio.get('flac_sha1', [None])[0]
- except:
- return None
- else:
- return None