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     book_count = models.IntegerField(_('book count'), default=0, blank=False, null=False)
  47
  48     def has_description(self):
  49         return len(self.description) > 0
  50     has_description.short_description = _('description')
  51     has_description.boolean = True
  52
  53     @permalink
  54     def get_absolute_url(self):
  55         return ('catalogue.views.tagged_object_list', [self.slug])
  56
  57     class Meta:
  58         ordering = ('sort_key',)
  59         verbose_name = _('tag')
  60         verbose_name_plural = _('tags')
  61
  62     def __unicode__(self):
  63         return self.name
  64
  65     @staticmethod
  66     def get_tag_list(tags):
  67         if isinstance(tags, basestring):
  68             tag_slugs = tags.split('/')
  69             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
  70         else:
  71             return TagBase.get_tag_list(tags)
  72
  73
  74 def book_upload_path(ext):
  75     def get_dynamic_path(book, filename):
  76         return 'lektura/%s.%s' % (book.slug, ext)
  77     return get_dynamic_path
  78
  79
  80 class Book(models.Model):
  81     title = models.CharField(_('title'), max_length=120)
  82     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
  83     description = models.TextField(_('description'), blank=True)
  84     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  85     _short_html = models.TextField(_('short HTML'), editable=False)
  86     parent_number = models.IntegerField(_('parent number'), default=0)
  87
  88     # Formats
  89     xml_file = models.FileField(_('XML file'), upload_to=book_upload_path('xml'), blank=True)
  90     html_file = models.FileField(_('HTML file'), upload_to=book_upload_path('html'), blank=True)
  91     pdf_file = models.FileField(_('PDF file'), upload_to=book_upload_path('pdf'), blank=True)
  92     odt_file = models.FileField(_('ODT file'), upload_to=book_upload_path('odt'), blank=True)
  93     txt_file = models.FileField(_('TXT file'), upload_to=book_upload_path('txt'), blank=True)
  94
  95     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
  96
  97     objects = models.Manager()
  98     tagged = managers.ModelTaggedItemManager(Tag)
  99     tags = managers.TagDescriptor(Tag)
 100
 101     @property
 102     def name(self):
 103         return self.title
 104
 105     def short_html(self):
 106         if len(self._short_html):
 107             return mark_safe(self._short_html)
 108         else:
 109             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
 110             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
 111
 112             formats = []
 113             if self.html_file:
 114                 formats.append(u'<a href="%s">Czytaj online</a>' % reverse('book_text', kwargs={'slug': self.slug}))
 115             if self.pdf_file:
 116                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 117             if self.odt_file:
 118                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 119             if self.txt_file:
 120                 formats.append(u'<a href="%s">Plik TXT</a>' % self.txt_file.url)
 121
 122             self._short_html = unicode(render_to_string('catalogue/book_short.html',
 123                 {'book': self, 'tags': tags, 'formats': formats}))
 124             self.save()
 125             return mark_safe(self._short_html)
 126
 127     def has_description(self):
 128         return len(self.description) > 0
 129     has_description.short_description = _('description')
 130     has_description.boolean = True
 131
 132     def has_pdf_file(self):
 133         return bool(self.pdf_file)
 134     has_pdf_file.short_description = 'PDF'
 135     has_pdf_file.boolean = True
 136
 137     def has_odt_file(self):
 138         return bool(self.odt_file)
 139     has_odt_file.short_description = 'ODT'
 140     has_odt_file.boolean = True
 141
 142     def has_html_file(self):
 143         return bool(self.html_file)
 144     has_html_file.short_description = 'HTML'
 145     has_html_file.boolean = True
 146
 147     class AlreadyExists(Exception):
 148         pass
 149
 150     @staticmethod
 151     def from_xml_file(xml_file, overwrite=False):
 152         from tempfile import NamedTemporaryFile
 153         from slughifi import slughifi
 154         from markupstring import MarkupString
 155
 156         # Read book metadata
 157         book_info = dcparser.parse(xml_file)
 158         book_base, book_slug = book_info.url.rsplit('/', 1)
 159         book, created = Book.objects.get_or_create(slug=book_slug)
 160
 161         if created:
 162             book_shelves = []
 163         else:
 164             if not overwrite:
 165                 raise Book.AlreadyExists('Book %s already exists' % book_slug)
 166             # Save shelves for this book
 167             book_shelves = list(book.tags.filter(category='set'))
 168
 169         book.title = book_info.title
 170         book._short_html = ''
 171         book.save()
 172
 173         book_tags = []
 174         for category in ('kind', 'genre', 'author', 'epoch'):
 175             tag_name = getattr(book_info, category)
 176             tag_sort_key = tag_name
 177             if category == 'author':
 178                 tag_sort_key = tag_name.last_name
 179                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 180             tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name))
 181             if created:
 182                 tag.name = tag_name
 183                 tag.sort_key = slughifi(tag_sort_key)
 184                 tag.category = category
 185                 tag.save()
 186             book_tags.append(tag)
 187         book.tags = book_tags
 188
 189         if hasattr(book_info, 'parts'):
 190             for n, part_url in enumerate(book_info.parts):
 191                 base, slug = part_url.rsplit('/', 1)
 192                 child_book = Book.objects.get(slug=slug)
 193                 child_book.parent = book
 194                 child_book.parent_number = n
 195                 child_book.save()
 196
 197         # Save XML and HTML files
 198         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 199
 200         html_file = NamedTemporaryFile()
 201         if html.transform(book.xml_file.path, html_file):
 202             book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 203
 204             # Extract fragments
 205             closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 206             book_themes = []
 207             for fragment in closed_fragments.values():
 208                 text = fragment.to_string()
 209                 short_text = ''
 210                 if (len(MarkupString(text)) > 240):
 211                     short_text = unicode(MarkupString(text)[:160])
 212                 new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book,
 213                     defaults={'text': text, 'short_text': short_text})
 214
 215                 try:
 216                     theme_names = [s.strip() for s in fragment.themes.split(',')]
 217                 except AttributeError:
 218                     continue
 219                 themes = []
 220                 for theme_name in theme_names:
 221                     tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name))
 222                     if created:
 223                         tag.name = theme_name
 224                         tag.sort_key = slughifi(theme_name)
 225                         tag.category = 'theme'
 226                         tag.save()
 227                     themes.append(tag)
 228                 new_fragment.save()
 229                 new_fragment.tags = list(book.tags) + themes
 230                 book_themes += themes
 231
 232             book_themes = set(book_themes)
 233             book.tags = list(book.tags) + list(book_themes) + book_shelves
 234
 235         book.save()
 236         return book
 237
 238     @permalink
 239     def get_absolute_url(self):
 240         return ('catalogue.views.book_detail', [self.slug])
 241
 242     class Meta:
 243         ordering = ('title',)
 244         verbose_name = _('book')
 245         verbose_name_plural = _('books')
 246
 247     def __unicode__(self):
 248         return self.title
 249
 250
 251 class Fragment(models.Model):
 252     text = models.TextField()
 253     short_text = models.TextField(editable=False)
 254     _short_html = models.TextField(editable=False)
 255     anchor = models.CharField(max_length=120)
 256     book = models.ForeignKey(Book, related_name='fragments')
 257
 258     objects = models.Manager()
 259     tagged = managers.ModelTaggedItemManager(Tag)
 260     tags = managers.TagDescriptor(Tag)
 261
 262     def short_html(self):
 263         if len(self._short_html):
 264             return mark_safe(self._short_html)
 265         else:
 266             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 267                 for tag in self.book.tags if tag.category == 'author']
 268
 269             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
 270                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
 271             self.save()
 272             return mark_safe(self._short_html)
 273
 274     def get_absolute_url(self):
 275         return '%s#m%s' % (reverse('book_text', kwargs={'slug': self.book.slug}), self.anchor)
 276
 277     class Meta:
 278         ordering = ('book', 'anchor',)
 279         verbose_name = _('fragment')
 280         verbose_name_plural = _('fragments')
 281