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