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     def short_html(self):
 101         if len(self._short_html):
 102             return mark_safe(self._short_html)
 103         else:
 104             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
 105             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
 106
 107             formats = []
 108             if self.html_file:
 109                 formats.append(u'<a href="%s">Czytaj online</a>' % reverse('book_text', kwargs={'slug': self.slug}))
 110             if self.pdf_file:
 111                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
 112             if self.odt_file:
 113                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
 114
 115             self._short_html = unicode(render_to_string('catalogue/book_short.html',
 116                 {'book': self, 'tags': tags, 'formats': formats}))
 117             self.save()
 118             return mark_safe(self._short_html)
 119
 120     def has_description(self):
 121         return len(self.description) > 0
 122     has_description.short_description = _('description')
 123     has_description.boolean = True
 124
 125     def has_pdf_file(self):
 126         return bool(self.pdf_file)
 127     has_pdf_file.short_description = 'PDF'
 128     has_pdf_file.boolean = True
 129
 130     def has_odt_file(self):
 131         return bool(self.odt_file)
 132     has_odt_file.short_description = 'ODT'
 133     has_odt_file.boolean = True
 134
 135     def has_html_file(self):
 136         return bool(self.html_file)
 137     has_html_file.short_description = 'HTML'
 138     has_html_file.boolean = True
 139
 140     class AlreadyExists(Exception):
 141         pass
 142
 143     @staticmethod
 144     def from_xml_file(xml_file, overwrite=False):
 145         from tempfile import NamedTemporaryFile
 146         from slughifi import slughifi
 147         from markupstring import MarkupString
 148
 149         # Read book metadata
 150         book_info = dcparser.parse(xml_file)
 151         book_base, book_slug = book_info.url.rsplit('/', 1)
 152         book, created = Book.objects.get_or_create(slug=book_slug)
 153         if not created and not overwrite:
 154             raise Book.AlreadyExists('Book %s already exists' % book_slug)
 155
 156         book.title = book_info.title
 157         book.save()
 158
 159         book_tags = []
 160         for category in ('kind', 'genre', 'author', 'epoch'):
 161             tag_name = getattr(book_info, category)
 162             tag_sort_key = tag_name
 163             if category == 'author':
 164                 tag_sort_key = tag_name.last_name
 165                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 166             tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name))
 167             if created:
 168                 tag.name = tag_name
 169                 tag.sort_key = slughifi(tag_sort_key)
 170                 tag.category = category
 171                 tag.save()
 172             book_tags.append(tag)
 173         book.tags = book_tags
 174
 175         if hasattr(book_info, 'parts'):
 176             for n, part_url in enumerate(book_info.parts):
 177                 base, slug = part_url.rsplit('/', 1)
 178                 child_book = Book.objects.get(slug=slug)
 179                 child_book.parent = book
 180                 child_book.parent_number = n
 181                 child_book.save()
 182
 183         # Save XML and HTML files
 184         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 185
 186         html_file = NamedTemporaryFile()
 187         if html.transform(book.xml_file.path, html_file):
 188             book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 189
 190             # Extract fragments
 191             closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 192             book_themes = []
 193             for fragment in closed_fragments.values():
 194                 text = fragment.to_string()
 195                 short_text = ''
 196                 if (len(MarkupString(text)) > 240):
 197                     short_text = unicode(MarkupString(text)[:160])
 198                 new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
 199
 200                 try:
 201                     theme_names = [s.strip() for s in fragment.themes.split(',')]
 202                 except AttributeError:
 203                     continue
 204                 themes = []
 205                 for theme_name in theme_names:
 206                     tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name))
 207                     if created:
 208                         tag.name = theme_name
 209                         tag.sort_key = slughifi(theme_name)
 210                         tag.category = 'theme'
 211                         tag.save()
 212                     themes.append(tag)
 213                 new_fragment.save()
 214                 new_fragment.tags = list(book.tags) + themes
 215                 book_themes += themes
 216
 217             book_themes = set(book_themes)
 218             book.tags = list(book.tags) + list(book_themes)
 219
 220         book.save()
 221         return book
 222
 223     @permalink
 224     def get_absolute_url(self):
 225         return ('catalogue.views.book_detail', [self.slug])
 226
 227     class Meta:
 228         ordering = ('title',)
 229         verbose_name = _('book')
 230         verbose_name_plural = _('books')
 231
 232     def __unicode__(self):
 233         return self.title
 234
 235
 236 class Fragment(models.Model):
 237     text = models.TextField()
 238     short_text = models.TextField(editable=False)
 239     _short_html = models.TextField(editable=False)
 240     anchor = models.CharField(max_length=120)
 241     book = models.ForeignKey(Book, related_name='fragments')
 242
 243     objects = models.Manager()
 244     tagged = managers.ModelTaggedItemManager(Tag)
 245     tags = managers.TagDescriptor(Tag)
 246
 247     def short_html(self):
 248         if len(self._short_html):
 249             return mark_safe(self._short_html)
 250         else:
 251             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name)
 252                 for tag in self.book.tags if tag.category == 'author']
 253
 254             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
 255                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
 256             self.save()
 257             return mark_safe(self._short_html)
 258
 259     def get_absolute_url(self):
 260         return '%s#m%s' % (reverse('book_text', kwargs={'slug': self.book.slug}), self.anchor)
 261
 262     class Meta:
 263         ordering = ('book', 'anchor',)
 264         verbose_name = _('fragment')
 265         verbose_name_plural = _('fragments')
 266