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 def book_upload_path(ext):
  73     def get_dynamic_path(book, filename):
  74         return 'lektura/%s.%s' % (book.slug, ext)
  75     return get_dynamic_path
  76
  77
  78 class Book(models.Model):
  79     title = models.CharField(_('title'), max_length=120)
  80     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
  81     description = models.TextField(_('description'), blank=True)
  82     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  83     _short_html = models.TextField(_('short HTML'), editable=False)
  84
  85     # Formats
  86     xml_file = models.FileField(_('XML file'), upload_to=book_upload_path('xml'), blank=True)
  87     html_file = models.FileField(_('HTML file'), upload_to=book_upload_path('html'), blank=True)
  88     pdf_file = models.FileField(_('PDF file'), upload_to=book_upload_path('pdf'), blank=True)
  89     odt_file = models.FileField(_('ODT file'), upload_to=book_upload_path('odt'), blank=True)
  90     txt_file = models.FileField(_('TXT file'), upload_to=book_upload_path('txt'), blank=True)
  91
  92     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
  93
  94     objects = models.Manager()
  95     tagged = managers.ModelTaggedItemManager(Tag)
  96     tags = managers.TagDescriptor(Tag)
  97
  98     def short_html(self):
  99         if len(self._short_html):
 100             return mark_safe(self._short_html)
 101         else:
 102             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
 103             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
 104
 105             formats = []
 106             if self.html_file:
 107                 formats.append(u'<a href="%s">Czytaj online</a>' % self.html_file.url)
 108             if self.pdf_file:
 109                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 110             if self.odt_file:
 111                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 112
 113             self._short_html = unicode(render_to_string('catalogue/book_short.html',
 114                 {'book': self, 'tags': tags, 'formats': formats}))
 115             self.save()
 116             return mark_safe(self._short_html)
 117
 118     def has_description(self):
 119         return len(self.description) > 0
 120     has_description.short_description = _('description')
 121     has_description.boolean = True
 122
 123     def has_pdf_file(self):
 124         return bool(self.pdf_file)
 125     has_pdf_file.short_description = 'PDF'
 126     has_pdf_file.boolean = True
 127
 128     def has_odt_file(self):
 129         return bool(self.odt_file)
 130     has_odt_file.short_description = 'ODT'
 131     has_odt_file.boolean = True
 132
 133     def has_html_file(self):
 134         return bool(self.html_file)
 135     has_html_file.short_description = 'HTML'
 136     has_html_file.boolean = True
 137
 138     @staticmethod
 139     def from_xml_file(xml_file):
 140         from tempfile import NamedTemporaryFile
 141         from slughifi import slughifi
 142         from markupstring import MarkupString
 143
 144         # Read book metadata
 145         book_info = dcparser.parse(xml_file)
 146         book_base, book_slug = book_info.url.rsplit('/', 1)
 147         book = Book(title=book_info.title, slug=book_slug)
 148         book.save()
 149
 150         book_tags = []
 151         for category in ('kind', 'genre', 'author', 'epoch'):
 152             tag_name = getattr(book_info, category)
 153             tag_sort_key = tag_name
 154             if category == 'author':
 155                 tag_sort_key = tag_name.last_name
 156                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 157             tag, created = Tag.objects.get_or_create(name=tag_name,
 158                 slug=slughifi(tag_name), sort_key=slughifi(tag_sort_key), category=category)
 159             tag.save()
 160             book_tags.append(tag)
 161         book.tags = book_tags
 162
 163         if hasattr(book_info, 'parts'):
 164             for part_url in book_info.parts:
 165                 base, slug = part_url.rsplit('/', 1)
 166                 child_book = Book.objects.get(slug=slug)
 167                 child_book.parent = book
 168                 child_book.save()
 169
 170         # Save XML and HTML files
 171         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 172
 173         html_file = NamedTemporaryFile()
 174         html.transform(book.xml_file.path, html_file)
 175         book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 176
 177         # Extract fragments
 178         closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 179         book_themes = []
 180         for fragment in closed_fragments.values():
 181             text = fragment.to_string()
 182             short_text = ''
 183             if (len(MarkupString(text)) > 240):
 184                 short_text = unicode(MarkupString(text)[:160])
 185             new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
 186
 187             theme_names = [s.strip() for s in fragment.themes.split(',')]
 188             themes = []
 189             for theme_name in theme_names:
 190                 tag, created = Tag.objects.get_or_create(name=theme_name,
 191                     slug=slughifi(theme_name), sort_key=slughifi(theme_name), category='theme')
 192                 tag.save()
 193                 themes.append(tag)
 194             new_fragment.save()
 195             new_fragment.tags = list(book.tags) + themes
 196             book_themes += themes
 197
 198         book_themes = set(book_themes)
 199         book.tags = list(book.tags) + list(book_themes)
 200         return book.save()
 201
 202     @permalink
 203     def get_absolute_url(self):
 204         return ('catalogue.views.book_detail', [self.slug])
 205
 206     class Meta:
 207         ordering = ('title',)
 208         verbose_name = _('book')
 209         verbose_name_plural = _('books')
 210
 211     def __unicode__(self):
 212         return self.title
 213
 214
 215 class Fragment(models.Model):
 216     text = models.TextField()
 217     short_text = models.TextField(editable=False)
 218     _short_html = models.TextField(editable=False)
 219     anchor = models.CharField(max_length=120)
 220     book = models.ForeignKey(Book, related_name='fragments')
 221
 222     objects = models.Manager()
 223     tagged = managers.ModelTaggedItemManager(Tag)
 224     tags = managers.TagDescriptor(Tag)
 225
 226     def short_html(self):
 227         if len(self._short_html):
 228             return mark_safe(self._short_html)
 229         else:
 230             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 231                 for tag in self.book.tags if tag.category == 'author']
 232
 233             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
 234                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
 235             self.save()
 236             return mark_safe(self._short_html)
 237
 238     def get_absolute_url(self):
 239         return '%s#m%s' % (self.book.html_file.url, self.anchor)
 240
 241     class Meta:
 242         ordering = ('book', 'anchor',)
 243         verbose_name = _('fragment')
 244         verbose_name_plural = _('fragments')
 245