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 from django.core.urlresolvers import reverse
  10
  11 from newtagging.models import TagBase
  12 from newtagging import managers
  13
  14 from librarian import html, dcparser
  15
  16
  17 TAG_CATEGORIES = (
  18     ('author', _('author')),
  19     ('epoch', _('epoch')),
  20     ('kind', _('kind')),
  21     ('genre', _('genre')),
  22     ('theme', _('theme')),
  23     ('set', _('set')),
  24 )
  25
  26
  27 class TagSubcategoryManager(models.Manager):
  28     def __init__(self, subcategory):
  29         super(TagSubcategoryManager, self).__init__()
  30         self.subcategory = subcategory
  31
  32     def get_query_set(self):
  33         return super(TagSubcategoryManager, self).get_query_set().filter(category=self.subcategory)
  34
  35
  36 class Tag(TagBase):
  37     name = models.CharField(_('name'), max_length=50, db_index=True)
  38     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
  39     sort_key = models.SlugField(_('sort key'), max_length=120, db_index=True)
  40     category = models.CharField(_('category'), max_length=50, blank=False, null=False,
  41         db_index=True, choices=TAG_CATEGORIES)
  42     description = models.TextField(_('description'), blank=True)
  43     main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
  44
  45     user = models.ForeignKey(User, blank=True, null=True)
  46
  47     def has_description(self):
  48         return len(self.description) > 0
  49     has_description.short_description = _('description')
  50     has_description.boolean = True
  51
  52     @permalink
  53     def get_absolute_url(self):
  54         return ('catalogue.views.tagged_object_list', [self.slug])
  55
  56     class Meta:
  57         ordering = ('sort_key',)
  58         verbose_name = _('tag')
  59         verbose_name_plural = _('tags')
  60
  61     def __unicode__(self):
  62         return self.name
  63
  64     @staticmethod
  65     def get_tag_list(tags):
  66         if isinstance(tags, basestring):
  67             tag_slugs = tags.split('/')
  68             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
  69         else:
  70             return TagBase.get_tag_list(tags)
  71
  72
  73 def book_upload_path(ext):
  74     def get_dynamic_path(book, filename):
  75         return 'lektura/%s.%s' % (book.slug, ext)
  76     return get_dynamic_path
  77
  78
  79 class Book(models.Model):
  80     title = models.CharField(_('title'), max_length=120)
  81     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
  82     description = models.TextField(_('description'), blank=True)
  83     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  84     _short_html = models.TextField(_('short HTML'), editable=False)
  85     parent_number = models.IntegerField(_('parent number'), default=0)
  86
  87     # Formats
  88     xml_file = models.FileField(_('XML file'), upload_to=book_upload_path('xml'), blank=True)
  89     html_file = models.FileField(_('HTML file'), upload_to=book_upload_path('html'), blank=True)
  90     pdf_file = models.FileField(_('PDF file'), upload_to=book_upload_path('pdf'), blank=True)
  91     odt_file = models.FileField(_('ODT file'), upload_to=book_upload_path('odt'), blank=True)
  92     txt_file = models.FileField(_('TXT file'), upload_to=book_upload_path('txt'), blank=True)
  93
  94     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
  95
  96     objects = models.Manager()
  97     tagged = managers.ModelTaggedItemManager(Tag)
  98     tags = managers.TagDescriptor(Tag)
  99
 100     @property
 101     def name(self):
 102         return self.title
 103
 104     def short_html(self):
 105         if len(self._short_html):
 106             return mark_safe(self._short_html)
 107         else:
 108             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
 109             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
 110
 111             formats = []
 112             if self.html_file:
 113                 formats.append(u'<a href="%s">Czytaj online</a>' % reverse('book_text', kwargs={'slug': self.slug}))
 114             if self.pdf_file:
 115                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 116             if self.odt_file:
 117                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 118             if self.txt_file:
 119                 formats.append(u'<a href="%s">Plik TXT</a>' % self.txt_file.url)
 120
 121             self._short_html = unicode(render_to_string('catalogue/book_short.html',
 122                 {'book': self, 'tags': tags, 'formats': formats}))
 123             self.save()
 124             return mark_safe(self._short_html)
 125
 126     def has_description(self):
 127         return len(self.description) > 0
 128     has_description.short_description = _('description')
 129     has_description.boolean = True
 130
 131     def has_pdf_file(self):
 132         return bool(self.pdf_file)
 133     has_pdf_file.short_description = 'PDF'
 134     has_pdf_file.boolean = True
 135
 136     def has_odt_file(self):
 137         return bool(self.odt_file)
 138     has_odt_file.short_description = 'ODT'
 139     has_odt_file.boolean = True
 140
 141     def has_html_file(self):
 142         return bool(self.html_file)
 143     has_html_file.short_description = 'HTML'
 144     has_html_file.boolean = True
 145
 146     class AlreadyExists(Exception):
 147         pass
 148
 149     @staticmethod
 150     def from_xml_file(xml_file, overwrite=False):
 151         from tempfile import NamedTemporaryFile
 152         from slughifi import slughifi
 153         from markupstring import MarkupString
 154
 155         # Read book metadata
 156         book_info = dcparser.parse(xml_file)
 157         book_base, book_slug = book_info.url.rsplit('/', 1)
 158         book, created = Book.objects.get_or_create(slug=book_slug)
 159         if not created and not overwrite:
 160             raise Book.AlreadyExists('Book %s already exists' % book_slug)
 161
 162         book.title = book_info.title
 163         book._short_html = ''
 164         book.save()
 165
 166         book_tags = []
 167         for category in ('kind', 'genre', 'author', 'epoch'):
 168             tag_name = getattr(book_info, category)
 169             tag_sort_key = tag_name
 170             if category == 'author':
 171                 tag_sort_key = tag_name.last_name
 172                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 173             tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name))
 174             if created:
 175                 tag.name = tag_name
 176                 tag.sort_key = slughifi(tag_sort_key)
 177                 tag.category = category
 178                 tag.save()
 179             book_tags.append(tag)
 180         book.tags = book_tags
 181
 182         if hasattr(book_info, 'parts'):
 183             for n, part_url in enumerate(book_info.parts):
 184                 base, slug = part_url.rsplit('/', 1)
 185                 child_book = Book.objects.get(slug=slug)
 186                 child_book.parent = book
 187                 child_book.parent_number = n
 188                 child_book.save()
 189
 190         # Save XML and HTML files
 191         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 192
 193         html_file = NamedTemporaryFile()
 194         if html.transform(book.xml_file.path, html_file):
 195             book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 196
 197             # Extract fragments
 198             closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 199             book_themes = []
 200             for fragment in closed_fragments.values():
 201                 text = fragment.to_string()
 202                 short_text = ''
 203                 if (len(MarkupString(text)) > 240):
 204                     short_text = unicode(MarkupString(text)[:160])
 205                 new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book,
 206                     defaults={'text': text, 'short_text': short_text})
 207
 208                 try:
 209                     theme_names = [s.strip() for s in fragment.themes.split(',')]
 210                 except AttributeError:
 211                     continue
 212                 themes = []
 213                 for theme_name in theme_names:
 214                     tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name))
 215                     if created:
 216                         tag.name = theme_name
 217                         tag.sort_key = slughifi(theme_name)
 218                         tag.category = 'theme'
 219                         tag.save()
 220                     themes.append(tag)
 221                 new_fragment.save()
 222                 new_fragment.tags = list(book.tags) + themes
 223                 book_themes += themes
 224
 225             book_themes = set(book_themes)
 226             book.tags = list(book.tags) + list(book_themes)
 227
 228         book.save()
 229         return book
 230
 231     @permalink
 232     def get_absolute_url(self):
 233         return ('catalogue.views.book_detail', [self.slug])
 234
 235     class Meta:
 236         ordering = ('title',)
 237         verbose_name = _('book')
 238         verbose_name_plural = _('books')
 239
 240     def __unicode__(self):
 241         return self.title
 242
 243
 244 class Fragment(models.Model):
 245     text = models.TextField()
 246     short_text = models.TextField(editable=False)
 247     _short_html = models.TextField(editable=False)
 248     anchor = models.CharField(max_length=120)
 249     book = models.ForeignKey(Book, related_name='fragments')
 250
 251     objects = models.Manager()
 252     tagged = managers.ModelTaggedItemManager(Tag)
 253     tags = managers.TagDescriptor(Tag)
 254
 255     def short_html(self):
 256         if len(self._short_html):
 257             return mark_safe(self._short_html)
 258         else:
 259             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 260                 for tag in self.book.tags if tag.category == 'author']
 261
 262             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
 263                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
 264             self.save()
 265             return mark_safe(self._short_html)
 266
 267     def get_absolute_url(self):
 268         return '%s#m%s' % (reverse('book_text', kwargs={'slug': self.book.slug}), self.anchor)
 269
 270     class Meta:
 271         ordering = ('book', 'anchor',)
 272         verbose_name = _('fragment')
 273         verbose_name_plural = _('fragments')
 274