catalogue/models.py

   1 # -*- coding: utf-8 -*-
   2 from django.db import models
   3 from django.db.models import permalink
   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
   8 from newtagging.models import TagBase
   9 from newtagging import managers
  10
  11 from librarian import html
  12
  13
  14 TAG_CATEGORIES = (
  15     ('author', _('author')),
  16     ('epoch', _('epoch')),
  17     ('kind', _('kind')),
  18     ('genre', _('genre')),
  19     ('theme', _('theme')),
  20     ('set', _('set')),
  21 )
  22
  23
  24 class TagSubcategoryManager(models.Manager):
  25     def __init__(self, subcategory):
  26         super(TagSubcategoryManager, self).__init__()
  27         self.subcategory = subcategory
  28
  29     def get_query_set(self):
  30         return super(TagSubcategoryManager, self).get_query_set().filter(category=self.subcategory)
  31
  32
  33 class Tag(TagBase):
  34     name = models.CharField(_('name'), max_length=50, unique=True, db_index=True)
  35     slug = models.SlugField(_('slug'), unique=True, db_index=True)
  36     sort_key = models.SlugField(_('sort key'), db_index=True)
  37     category = models.CharField(_('category'), max_length=50, blank=False, null=False,
  38         db_index=True, choices=TAG_CATEGORIES)
  39     description = models.TextField(blank=True)
  40
  41     user = models.ForeignKey(User, blank=True, null=True)
  42
  43     def has_description(self):
  44         return len(self.description) > 0
  45     has_description.short_description = _('description')
  46     has_description.boolean = True
  47
  48     @permalink
  49     def get_absolute_url(self):
  50         return ('catalogue.views.tagged_book_list', [self.slug])
  51
  52     class Meta:
  53         ordering = ('sort_key',)
  54         verbose_name = _('tag')
  55         verbose_name_plural = _('tags')
  56
  57     def __unicode__(self):
  58         return self.name
  59
  60     @staticmethod
  61     def get_tag_list(tags):
  62         if isinstance(tags, basestring):
  63             tag_slugs = tags.split('/')
  64             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
  65         else:
  66             return TagBase.get_tag_list(tags)
  67
  68
  69 class Book(models.Model):
  70     title = models.CharField(_('title'), max_length=120)
  71     slug = models.SlugField(_('slug'), unique=True, db_index=True)
  72     description = models.TextField(_('description'), blank=True)
  73     created_at = models.DateTimeField(_('creation date'), auto_now=True)
  74
  75     # Formats
  76     xml_file = models.FileField(_('XML file'), upload_to='books/xml', blank=True)
  77     pdf_file = models.FileField(_('PDF file'), upload_to='books/pdf', blank=True)
  78     odt_file = models.FileField(_('ODT file'), upload_to='books/odt', blank=True)
  79     html_file = models.FileField(_('HTML file'), upload_to='books/html', blank=True)
  80
  81     objects = managers.ModelTaggedItemManager(Tag)
  82     tags = managers.TagDescriptor(Tag)
  83
  84     def has_description(self):
  85         return len(self.description) > 0
  86     has_description.short_description = _('description')
  87     has_description.boolean = True
  88
  89     def has_pdf_file(self):
  90         return bool(self.pdf_file)
  91     has_pdf_file.short_description = 'PDF'
  92     has_pdf_file.boolean = True
  93
  94     def has_odt_file(self):
  95         return bool(self.odt_file)
  96     has_odt_file.short_description = 'ODT'
  97     has_odt_file.boolean = True
  98
  99     def has_html_file(self):
 100         return bool(self.html_file)
 101     has_html_file.short_description = 'HTML'
 102     has_html_file.boolean = True
 103
 104     @staticmethod
 105     def from_xml_file(xml_file):
 106         from tempfile import NamedTemporaryFile
 107         from slughifi import slughifi
 108         import dcparser
 109
 110         book_info = dcparser.parse(xml_file)
 111         book = Book(title=book_info.title, slug=slughifi(book_info.title))
 112         book.save()
 113
 114         book_tags = []
 115         for category in ('kind', 'genre', 'author', 'epoch'):
 116             tag_name = getattr(book_info, category)
 117             tag_sort_key = tag_name
 118             if category == 'author':
 119                 tag_sort_key = tag_name.last_name
 120                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
 121             tag, created = Tag.objects.get_or_create(name=tag_name,
 122                 slug=slughifi(tag_name), sort_key=slughifi(tag_sort_key), category=category)
 123             tag.save()
 124             book_tags.append(tag)
 125         book.tags = book_tags
 126
 127         # Save XML and HTML files
 128         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
 129
 130         html_file = NamedTemporaryFile()
 131         html.transform(book.xml_file.path, html_file)
 132         book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 133
 134         # Extract fragments
 135         closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
 136         book_themes = []
 137         for fragment in closed_fragments.values():
 138             new_fragment = Fragment(html=fragment.to_string(), short_html=fragment.to_string(),
 139                 anchor=fragment.id, book=book)
 140
 141             theme_names = [s.strip() for s in fragment.themes.split(',')]
 142             themes = []
 143             for theme_name in theme_names:
 144                 tag, created = Tag.objects.get_or_create(name=theme_name,
 145                     slug=slughifi(theme_name), sort_key=slughifi(theme_name), category='theme')
 146                 tag.save()
 147                 themes.append(tag)
 148             new_fragment.save()
 149             new_fragment.tags = list(book.tags) + themes
 150             book_themes += themes
 151
 152         book_themes = set(book_themes)
 153         book.tags = list(book.tags) + list(book_themes)
 154         return book.save()
 155
 156     @permalink
 157     def get_absolute_url(self):
 158         return ('catalogue.views.book_detail', [self.slug])
 159
 160     class Meta:
 161         ordering = ('title',)
 162         verbose_name = _('book')
 163         verbose_name_plural = _('books')
 164
 165     def __unicode__(self):
 166         return self.title
 167
 168
 169 class Fragment(models.Model):
 170     html = models.TextField()
 171     short_html = models.TextField()
 172     anchor = models.IntegerField()
 173     book = models.ForeignKey(Book, related_name='fragments')
 174
 175     objects = managers.ModelTaggedItemManager(Tag)
 176     tags = managers.TagDescriptor(Tag)
 177
 178     class Meta:
 179         ordering = ('book', 'anchor',)
 180         verbose_name = _('fragment')
 181         verbose_name_plural = _('fragments')
 182