1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
4 from collections import OrderedDict
6 from collections import namedtuple
7 from django.db import models
8 from django.utils.translation import ugettext_lazy as _
9 from slugify import slugify
10 from mutagen import MutagenError
12 from catalogue.fields import OverwriteStorage
15 def _file_upload_to(i, _n):
16 return 'book/%(ext)s/%(name)s.%(ext)s' % {'ext': i.ext(), 'name': slugify(i.name)}
19 class BookMedia(models.Model):
20 """Represents media attached to a book."""
21 FileFormat = namedtuple("FileFormat", "name ext")
22 formats = OrderedDict([
23 ('mp3', FileFormat(name='MP3', ext='mp3')),
24 ('ogg', FileFormat(name='Ogg Vorbis', ext='ogg')),
25 ('daisy', FileFormat(name='DAISY', ext='daisy.zip')),
27 format_choices = [(k, _('%s file' % t.name)) for k, t in formats.items()]
29 type = models.CharField(_('type'), db_index=True, choices=format_choices, max_length=20)
30 name = models.CharField(_('name'), max_length=512)
31 part_name = models.CharField(_('part name'), default='', blank=True, max_length=512)
32 index = models.IntegerField(_('index'), default=0)
33 file = models.FileField(_('file'), max_length=600, upload_to=_file_upload_to, storage=OverwriteStorage())
34 uploaded_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False, db_index=True)
35 extra_info = models.TextField(_('extra information'), default='{}', editable=False)
36 book = models.ForeignKey('Book', models.CASCADE, related_name='media')
37 source_sha1 = models.CharField(null=True, blank=True, max_length=40, editable=False)
40 return "%s (%s)" % (self.name, self.file.name.split("/")[-1])
43 ordering = ('type', 'name')
44 verbose_name = _('book media')
45 verbose_name_plural = _('book media')
46 app_label = 'catalogue'
48 def get_extra_info_json(self):
49 return json.loads(self.extra_info or '{}')
51 def save(self, parts_count=None, *args, **kwargs):
52 from catalogue.utils import ExistingFile, remove_zip
55 parts_count = 1 + BookMedia.objects.filter(book=self.book, type=self.type).exclude(pk=self.pk).count()
57 self.name = self.book.pretty_title()
59 no = ('%02d' if parts_count < 100 else '%03d') % self.index
60 self.name = '%s. %s' % (no, self.book.pretty_title())
62 self.name += ', ' + self.part_name
65 old = BookMedia.objects.get(pk=self.pk)
66 except BookMedia.DoesNotExist:
69 # if name changed, change the file name, too
70 if slugify(self.name) != slugify(old.name):
71 self.file.save(None, ExistingFile(self.file.path), save=False)
73 super(BookMedia, self).save(*args, **kwargs)
75 # remove the zip package for book with modified media
77 remove_zip("%s_%s" % (old.book.slug, old.type))
78 remove_zip("%s_%s" % (self.book.slug, self.type))
80 extra_info = self.get_extra_info_json()
81 extra_info.update(self.read_meta())
82 self.extra_info = json.dumps(extra_info)
83 self.source_sha1 = self.read_source_sha1(self.file.path, self.type)
84 return super(BookMedia, self).save(*args, **kwargs)
88 Reads some metadata from the audiobook.
91 from mutagen import id3
93 artist_name = director_name = project = funded_by = license = ''
94 if self.type == 'mp3':
96 audio = id3.ID3(self.file.path)
97 artist_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE1'))
98 director_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE3'))
99 license = ', '.join(tag.url for tag in audio.getall('WCOP'))
100 project = ", ".join([
101 t.data.decode('utf-8') for t in audio.getall('PRIV')
102 if t.owner == 'wolnelektury.pl?project'])
103 funded_by = ", ".join([
104 t.data.decode('utf-8') for t in audio.getall('PRIV')
105 if t.owner == 'wolnelektury.pl?funded_by'])
108 elif self.type == 'ogg':
110 audio = mutagen.File(self.file.path)
111 artist_name = ', '.join(audio.get('artist', []))
112 director_name = ', '.join(audio.get('conductor', []))
113 license = ', '.join(audio.get('license', []))
114 project = ", ".join(audio.get('project', []))
115 funded_by = ", ".join(audio.get('funded_by', []))
116 except (MutagenError, AttributeError):
120 return {'artist_name': artist_name, 'director_name': director_name,
121 'project': project, 'funded_by': funded_by, 'license': license}
124 return self.formats[self.type].ext
127 def read_source_sha1(filepath, filetype):
129 Reads source file SHA1 from audiobok metadata.
132 from mutagen import id3
134 if filetype == 'mp3':
136 audio = id3.ID3(filepath)
137 return [t.data.decode('utf-8') for t in audio.getall('PRIV')
138 if t.owner == 'wolnelektury.pl?flac_sha1'][0]
139 except (MutagenError, IndexError):
141 elif filetype == 'ogg':
143 audio = mutagen.File(filepath)
144 return audio.get('flac_sha1', [None])[0]
145 except (MutagenError, AttributeError, IndexError):
152 return self.get_extra_info_json().get('director_name', None)
156 return self.get_extra_info_json().get('artist_name', None)