apps/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'), max_length=120, unique=True, db_index=True)
  38     sort_key = models.SlugField(_('sort key'), max_length=120, 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(_('description'), blank=True)
  42     main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
  43
  44     user = models.ForeignKey(User, blank=True, null=True)
  45
  46     def has_description(self):
  47         return len(self.description) > 0
  48     has_description.short_description = _('description')
  49     has_description.boolean = True
  50
  51     @permalink
  52     def get_absolute_url(self):
  53         return ('catalogue.views.tagged_object_list', [self.slug])
  54
  55     class Meta:
  56         ordering = ('sort_key',)
  57         verbose_name = _('tag')
  58         verbose_name_plural = _('tags')
  59
  60     def __unicode__(self):
  61         return self.name
  62
  63     @staticmethod
  64     def get_tag_list(tags):
  65         if isinstance(tags, basestring):
  66             tag_slugs = tags.split('/')
  67             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
  68         else:
  69             return TagBase.get_tag_list(tags)
  70
  71
  72 class Book(models.Model):
  73     title = models.CharField(_('title'), max_length=120)
  74     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
  75     description = models.TextField(_('description'), blank=True)
  76     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  77     _short_html = models.TextField(_('short HTML'), editable=False)
  78
  79     # Formats
  80     xml_file = models.FileField(_('XML file'), upload_to='books/xml', blank=True)
  81     pdf_file = models.FileField(_('PDF file'), upload_to='books/pdf', blank=True)
  82     odt_file = models.FileField(_('ODT file'), upload_to='books/odt', blank=True)
  83     html_file = models.FileField(_('HTML file'), upload_to='books/html', blank=True)
  84
  85     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
  86
  87     objects = models.Manager()
  88     tagged = managers.ModelTaggedItemManager(Tag)
  89     tags = managers.TagDescriptor(Tag)
  90
  91     def short_html(self):
  92         if len(self._short_html):
  93             return mark_safe(self._short_html)
  94         else:
  95             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
  96             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
  97
  98             formats = []
  99             if self.html_file:
 100                 formats.append(u'<a href="%s">Czytaj online</a>' % self.html_file.url)
 101             if self.pdf_file:
 102                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 103             if self.odt_file:
 104                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 105
 106             self._short_html = unicode(render_to_string('catalogue/book_short.html',
 107                 {'book': self, 'tags': tags, 'formats': formats}))
 108             self.save()
 109             return mark_safe(self._short_html)
 110
 111     def has_description(self):
 112         return len(self.description) > 0
 113     has_description.short_description = _('description')
 114     has_description.boolean = True
 115
 116     def has_pdf_file(self):
 117         return bool(self.pdf_file)
 118     has_pdf_file.short_description = 'PDF'
 119     has_pdf_file.boolean = True
 120
 121     def has_odt_file(self):
 122         return bool(self.odt_file)
 123     has_odt_file.short_description = 'ODT'
 124     has_odt_file.boolean = True
 125
 126     def has_html_file(self):
 127         return bool(self.html_file)
 128     has_html_file.short_description = 'HTML'
 129     has_html_file.boolean = True
 130
 131     @staticmethod
 132     def from_xml_file(xml_file):
 133         from tempfile import NamedTemporaryFile
 134         from slughifi import slughifi
 135         from markupstring import MarkupString
 136
 137         # Read book metadata
 138         book_info = dcparser.parse(xml_file)
 139         book = Book(title=book_info.title, slug=slughifi(book_info.title))
 140         book.save()
 141
 142         book_tags = []
 143         for category in ('kind', 'genre', 'author', 'epoch'):
 144             tag_name = getattr(book_info, category)
 145             tag_sort_key = tag_name
 146             if category == 'author':
 147                 tag_sort_key = tag_name.last_name
 148                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 149             tag, created = Tag.objects.get_or_create(name=tag_name,
 150                 slug=slughifi(tag_name), sort_key=slughifi(tag_sort_key), category=category)
 151             tag.save()
 152             book_tags.append(tag)
 153         book.tags = book_tags
 154
 155         if hasattr(book_info, 'parts'):
 156             for part_url in book_info.parts:
 157                 base, slug = part_url.rsplit('/', 1)
 158                 child_book = Book.objects.get(slug=slug)
 159                 child_book.parent = book
 160                 child_book.save()
 161
 162         # Save XML and HTML files
 163         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 164
 165         html_file = NamedTemporaryFile()
 166         html.transform(book.xml_file.path, html_file)
 167         book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 168
 169         # Extract fragments
 170         closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 171         book_themes = []
 172         for fragment in closed_fragments.values():
 173             text = fragment.to_string()
 174             short_text = ''
 175             if (len(MarkupString(text)) > 240):
 176                 short_text = unicode(MarkupString(text)[:160])
 177             new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
 178
 179             theme_names = [s.strip() for s in fragment.themes.split(',')]
 180             themes = []
 181             for theme_name in theme_names:
 182                 tag, created = Tag.objects.get_or_create(name=theme_name,
 183                     slug=slughifi(theme_name), sort_key=slughifi(theme_name), category='theme')
 184                 tag.save()
 185                 themes.append(tag)
 186             new_fragment.save()
 187             new_fragment.tags = list(book.tags) + themes
 188             book_themes += themes
 189
 190         book_themes = set(book_themes)
 191         book.tags = list(book.tags) + list(book_themes)
 192         return book.save()
 193
 194     @permalink
 195     def get_absolute_url(self):
 196         return ('catalogue.views.book_detail', [self.slug])
 197
 198     class Meta:
 199         ordering = ('title',)
 200         verbose_name = _('book')
 201         verbose_name_plural = _('books')
 202
 203     def __unicode__(self):
 204         return self.title
 205
 206
 207 class Fragment(models.Model):
 208     text = models.TextField()
 209     short_text = models.TextField(editable=False)
 210     _short_html = models.TextField(editable=False)
 211     anchor = models.CharField(max_length=120)
 212     book = models.ForeignKey(Book, related_name='fragments')
 213
 214     objects = models.Manager()
 215     tagged = managers.ModelTaggedItemManager(Tag)
 216     tags = managers.TagDescriptor(Tag)
 217
 218     def short_html(self):
 219         if len(self._short_html):
 220             return mark_safe(self._short_html)
 221         else:
 222             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 223                 for tag in self.book.tags if tag.category == 'author']
 224
 225             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
 226                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
 227             self.save()
 228             return mark_safe(self._short_html)
 229
 230     class Meta:
 231         ordering = ('book', 'anchor',)
 232         verbose_name = _('fragment')
 233         verbose_name_plural = _('fragments')
 234