catalogue/models.py

   1 # -*- coding: utf-8 -*-
   2 from django.db import models
   3 from django.db.models import permalink, Q
   4 from django.utils.translation import ugettext_lazy as _
   5 from django.contrib.auth.models import User
   6 from django.core.files import File
   7 from django.template.loader import render_to_string
   8 from django.utils.safestring import mark_safe
   9
  10 from newtagging.models import TagBase
  11 from newtagging import managers
  12
  13 from librarian import html, dcparser
  14
  15
  16 TAG_CATEGORIES = (
  17     ('author', _('author')),
  18     ('epoch', _('epoch')),
  19     ('kind', _('kind')),
  20     ('genre', _('genre')),
  21     ('theme', _('theme')),
  22     ('set', _('set')),
  23 )
  24
  25
  26 class TagSubcategoryManager(models.Manager):
  27     def __init__(self, subcategory):
  28         super(TagSubcategoryManager, self).__init__()
  29         self.subcategory = subcategory
  30
  31     def get_query_set(self):
  32         return super(TagSubcategoryManager, self).get_query_set().filter(category=self.subcategory)
  33
  34
  35 class Tag(TagBase):
  36     name = models.CharField(_('name'), max_length=50, unique=True, db_index=True)
  37     slug = models.SlugField(_('slug'), unique=True, db_index=True)
  38     sort_key = models.SlugField(_('sort key'), db_index=True)
  39     category = models.CharField(_('category'), max_length=50, blank=False, null=False,
  40         db_index=True, choices=TAG_CATEGORIES)
  41     description = models.TextField(blank=True)
  42
  43     user = models.ForeignKey(User, blank=True, null=True)
  44
  45     def has_description(self):
  46         return len(self.description) > 0
  47     has_description.short_description = _('description')
  48     has_description.boolean = True
  49
  50     @permalink
  51     def get_absolute_url(self):
  52         return ('catalogue.views.tagged_object_list', [self.slug])
  53
  54     class Meta:
  55         ordering = ('sort_key',)
  56         verbose_name = _('tag')
  57         verbose_name_plural = _('tags')
  58
  59     def __unicode__(self):
  60         return self.name
  61
  62     @staticmethod
  63     def get_tag_list(tags):
  64         if isinstance(tags, basestring):
  65             tag_slugs = tags.split('/')
  66             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
  67         else:
  68             return TagBase.get_tag_list(tags)
  69
  70
  71 class Book(models.Model):
  72     title = models.CharField(_('title'), max_length=120)
  73     slug = models.SlugField(_('slug'), unique=True, db_index=True)
  74     description = models.TextField(_('description'), blank=True)
  75     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  76     _short_html = models.TextField(_('short HTML'), editable=False)
  77
  78     # Formats
  79     xml_file = models.FileField(_('XML file'), upload_to='books/xml', blank=True)
  80     pdf_file = models.FileField(_('PDF file'), upload_to='books/pdf', blank=True)
  81     odt_file = models.FileField(_('ODT file'), upload_to='books/odt', blank=True)
  82     html_file = models.FileField(_('HTML file'), upload_to='books/html', blank=True)
  83
  84     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
  85
  86     objects = models.Manager()
  87     tagged = managers.ModelTaggedItemManager(Tag)
  88     tags = managers.TagDescriptor(Tag)
  89
  90     def short_html(self):
  91         if len(self._short_html):
  92             return mark_safe(self._short_html)
  93         else:
  94             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
  95             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
  96
  97             formats = []
  98             if self.html_file:
  99                 formats.append(u'<a href="%s">Czytaj online</a>' % self.html_file.url)
 100             if self.pdf_file:
 101                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 102             if self.odt_file:
 103                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 104
 105             self._short_html = render_to_string('catalogue/book_short.html',
 106                 {'book': self, 'tags': tags, 'formats': formats})
 107             self.save()
 108             return mark_safe(self._short_html)
 109
 110     def has_description(self):
 111         return len(self.description) > 0
 112     has_description.short_description = _('description')
 113     has_description.boolean = True
 114
 115     def has_pdf_file(self):
 116         return bool(self.pdf_file)
 117     has_pdf_file.short_description = 'PDF'
 118     has_pdf_file.boolean = True
 119
 120     def has_odt_file(self):
 121         return bool(self.odt_file)
 122     has_odt_file.short_description = 'ODT'
 123     has_odt_file.boolean = True
 124
 125     def has_html_file(self):
 126         return bool(self.html_file)
 127     has_html_file.short_description = 'HTML'
 128     has_html_file.boolean = True
 129
 130     @staticmethod
 131     def from_xml_file(xml_file):
 132         from tempfile import NamedTemporaryFile
 133         from slughifi import slughifi
 134         from markupstring import MarkupString
 135
 136         # Read book metadata
 137         book_info = dcparser.parse(xml_file)
 138         book = Book(title=book_info.title, slug=slughifi(book_info.title))
 139         book.save()
 140
 141         book_tags = []
 142         for category in ('kind', 'genre', 'author', 'epoch'):
 143             tag_name = getattr(book_info, category)
 144             tag_sort_key = tag_name
 145             if category == 'author':
 146                 tag_sort_key = tag_name.last_name
 147                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 148             tag, created = Tag.objects.get_or_create(name=tag_name,
 149                 slug=slughifi(tag_name), sort_key=slughifi(tag_sort_key), category=category)
 150             tag.save()
 151             book_tags.append(tag)
 152         book.tags = book_tags
 153
 154         if hasattr(book_info, 'parts'):
 155             for part_url in book_info.parts:
 156                 base, slug = part_url.rsplit('/', 1)
 157                 child_book = Book.objects.get(slug=slug)
 158                 child_book.parent = book
 159                 child_book.save()
 160
 161         # Save XML and HTML files
 162         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 163
 164         html_file = NamedTemporaryFile()
 165         html.transform(book.xml_file.path, html_file)
 166         book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 167
 168         # Extract fragments
 169         closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 170         book_themes = []
 171         for fragment in closed_fragments.values():
 172             text = fragment.to_string()
 173             short_text = ''
 174             if (len(MarkupString(text)) > 240):
 175                 short_text = MarkupString(text)[:160]
 176             new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
 177
 178             theme_names = [s.strip() for s in fragment.themes.split(',')]
 179             themes = []
 180             for theme_name in theme_names:
 181                 tag, created = Tag.objects.get_or_create(name=theme_name,
 182                     slug=slughifi(theme_name), sort_key=slughifi(theme_name), category='theme')
 183                 tag.save()
 184                 themes.append(tag)
 185             new_fragment.save()
 186             new_fragment.tags = list(book.tags) + themes
 187             book_themes += themes
 188
 189         book_themes = set(book_themes)
 190         book.tags = list(book.tags) + list(book_themes)
 191         return book.save()
 192
 193     @permalink
 194     def get_absolute_url(self):
 195         return ('catalogue.views.book_detail', [self.slug])
 196
 197     class Meta:
 198         ordering = ('title',)
 199         verbose_name = _('book')
 200         verbose_name_plural = _('books')
 201
 202     def __unicode__(self):
 203         return self.title
 204
 205
 206 class Fragment(models.Model):
 207     text = models.TextField()
 208     short_text = models.TextField(editable=False)
 209     _short_html = models.TextField(editable=False)
 210     anchor = models.IntegerField()
 211     book = models.ForeignKey(Book, related_name='fragments')
 212
 213     objects = models.Manager()
 214     tagged = managers.ModelTaggedItemManager(Tag)
 215     tags = managers.TagDescriptor(Tag)
 216
 217     def short_html(self):
 218         if len(self._short_html):
 219             return mark_safe(self._short_html)
 220         else:
 221             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 222                 for tag in self.book.tags if tag.category == 'author']
 223
 224             self._short_html = render_to_string('catalogue/fragment_short.html',
 225                 {'fragment': self, 'book': self.book, 'book_authors': book_authors})
 226             self.save()
 227             return mark_safe(self._short_html)
 228
 229     class Meta:
 230         ordering = ('book', 'anchor',)
 231         verbose_name = _('fragment')
 232         verbose_name_plural = _('fragments')
 233