apps/catalogue/templatetags/catalogue_tags.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 import datetime
   6 import feedparser
   7
   8 from django import template
   9 from django.template import Node, Variable, Template, Context
  10 from django.core.cache import cache
  11 from django.core.urlresolvers import reverse
  12 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
  13 from django.utils.translation import ugettext as _
  14
  15 from catalogue import forms
  16 from catalogue.utils import split_tags
  17 from catalogue.models import Book, Fragment, Tag
  18
  19 register = template.Library()
  20
  21
  22 class RegistrationForm(UserCreationForm):
  23     def as_ul(self):
  24         "Returns this form rendered as HTML <li>s -- excluding the <ul></ul>."
  25         return self._html_output(u'<li>%(errors)s%(label)s %(field)s<span class="help-text">%(help_text)s</span></li>', u'<li>%s</li>', '</li>', u' %s', False)
  26
  27
  28 class LoginForm(AuthenticationForm):
  29     def as_ul(self):
  30         "Returns this form rendered as HTML <li>s -- excluding the <ul></ul>."
  31         return self._html_output(u'<li>%(errors)s%(label)s %(field)s<span class="help-text">%(help_text)s</span></li>', u'<li>%s</li>', '</li>', u' %s', False)
  32
  33
  34 def iterable(obj):
  35     try:
  36         iter(obj)
  37         return True
  38     except TypeError:
  39         return False
  40
  41
  42 def capfirst(text):
  43     try:
  44         return '%s%s' % (text[0].upper(), text[1:])
  45     except IndexError:
  46         return ''
  47
  48
  49 @register.simple_tag
  50 def html_title_from_tags(tags):
  51     if len(tags) < 2:
  52         return title_from_tags(tags)
  53     template = Template("{{ category }}: <a href='{{ tag.get_absolute_url }}'>{{ tag.name }}</a>")
  54     return capfirst(",<br/>".join(
  55         template.render(Context({'tag': tag, 'category': _(tag.category)})) for tag in tags))
  56
  57
  58
  59 def simple_title(tags):
  60     title = []
  61     for tag in tags:
  62         title.append("%s: %s" % (_(tag.category), tag.name))
  63     return capfirst(', '.join(title))
  64
  65
  66 @register.simple_tag
  67 def book_title(book, html_links=False):
  68     return book.pretty_title(html_links)
  69
  70
  71 @register.simple_tag
  72 def book_title_html(book):
  73     return book_title(book, html_links=True)
  74
  75
  76 @register.simple_tag
  77 def title_from_tags(tags):
  78     def split_tags(tags):
  79         result = {}
  80         for tag in tags:
  81             result[tag.category] = tag
  82         return result
  83
  84     # TODO: Remove this after adding flection mechanism
  85     return simple_title(tags)
  86
  87     class Flection(object):
  88         def get_case(self, name, flection):
  89             return name
  90     flection = Flection()
  91
  92     self = split_tags(tags)
  93
  94     title = u''
  95
  96     # Specjalny przypadek oglądania wszystkich lektur na danej półce
  97     if len(self) == 1 and 'set' in self:
  98         return u'Półka %s' % self['set']
  99
 100     # Specjalny przypadek "Twórczość w pozytywizmie", wtedy gdy tylko epoka
 101     # jest wybrana przez użytkownika
 102     if 'epoch' in self and len(self) == 1:
 103         text = u'Twórczość w %s' % flection.get_case(unicode(self['epoch']), u'miejscownik')
 104         return capfirst(text)
 105
 106     # Specjalny przypadek "Dramat w twórczości Sofoklesa", wtedy gdy podane
 107     # są tylko rodzaj literacki i autor
 108     if 'kind' in self and 'author' in self and len(self) == 2:
 109         text = u'%s w twórczości %s' % (unicode(self['kind']),
 110             flection.get_case(unicode(self['author']), u'dopełniacz'))
 111         return capfirst(text)
 112
 113     # Przypadki ogólniejsze
 114     if 'theme' in self:
 115         title += u'Motyw %s' % unicode(self['theme'])
 116
 117     if 'genre' in self:
 118         if 'theme' in self:
 119             title += u' w %s' % flection.get_case(unicode(self['genre']), u'miejscownik')
 120         else:
 121             title += unicode(self['genre'])
 122
 123     if 'kind' in self or 'author' in self or 'epoch' in self:
 124         if 'genre' in self or 'theme' in self:
 125             if 'kind' in self:
 126                 title += u' w %s ' % flection.get_case(unicode(self['kind']), u'miejscownik')
 127             else:
 128                 title += u' w twórczości '
 129         else:
 130             title += u'%s ' % unicode(self.get('kind', u'twórczość'))
 131
 132     if 'author' in self:
 133         title += flection.get_case(unicode(self['author']), u'dopełniacz')
 134     elif 'epoch' in self:
 135         title += flection.get_case(unicode(self['epoch']), u'dopełniacz')
 136
 137     return capfirst(title)
 138
 139
 140 @register.simple_tag
 141 def book_tree(book_list, books_by_parent):
 142     text = "".join("<li><a href='%s'>%s</a>%s</li>" % (
 143         book.get_absolute_url(), book.title, book_tree(books_by_parent.get(book, ()), books_by_parent)
 144         ) for book in book_list)
 145
 146     if text:
 147         return "<ol>%s</ol>" % text
 148     else:
 149         return ''
 150
 151 @register.simple_tag
 152 def book_tree_texml(book_list, books_by_parent, depth=1):
 153     return "".join("""
 154             <cmd name='hspace'><parm>%(depth)dem</parm></cmd>%(title)s
 155             <spec cat='align' /><cmd name="note"><parm>%(audiences)s</parm></cmd>
 156             <spec cat='align' /><cmd name="note"><parm>%(audiobook)s</parm></cmd>
 157             <ctrl ch='\\' />
 158             %(children)s
 159             """ % {
 160                 "depth": depth,
 161                 "title": book.title,
 162                 "audiences": ", ".join(book.audiences_pl()),
 163                 "audiobook": "audiobook" if book.has_media('mp3') else "",
 164                 "children": book_tree_texml(books_by_parent.get(book.id, ()), books_by_parent, depth + 1)
 165             } for book in book_list)
 166
 167
 168 @register.simple_tag
 169 def all_editors(extra_info):
 170     editors = []
 171     if 'editors' in extra_info:
 172         editors += extra_info['editors']
 173     if 'technical_editors' in extra_info:
 174         editors += extra_info['technical_editors']
 175     # support for extra_info-s from librarian<1.2
 176     if 'editor' in extra_info:
 177         editors.append(extra_info['editor'])
 178     if 'technical_editor' in extra_info:
 179         editors.append(extra_info['technical_editor'])
 180     return ', '.join(
 181                      ' '.join(p.strip() for p in person.rsplit(',', 1)[::-1])
 182                      for person in sorted(set(editors)))
 183
 184
 185 @register.simple_tag
 186 def user_creation_form():
 187     return RegistrationForm(prefix='registration').as_ul()
 188
 189
 190 @register.simple_tag
 191 def authentication_form():
 192     return LoginForm(prefix='login').as_ul()
 193
 194
 195 @register.tag
 196 def catalogue_url(parser, token):
 197     bits = token.split_contents()
 198     tag_name = bits[0]
 199
 200     tags_to_add = []
 201     tags_to_remove = []
 202     for bit in bits[1:]:
 203         if bit[0] == '-':
 204             tags_to_remove.append(bit[1:])
 205         else:
 206             tags_to_add.append(bit)
 207
 208     return CatalogueURLNode(tags_to_add, tags_to_remove)
 209
 210
 211 class CatalogueURLNode(Node):
 212     def __init__(self, tags_to_add, tags_to_remove):
 213         self.tags_to_add = [Variable(tag) for tag in tags_to_add]
 214         self.tags_to_remove = [Variable(tag) for tag in tags_to_remove]
 215
 216     def render(self, context):
 217         tags_to_add = []
 218         tags_to_remove = []
 219
 220         for tag_variable in self.tags_to_add:
 221             tag = tag_variable.resolve(context)
 222             if isinstance(tag, (list, dict)):
 223                 tags_to_add += [t for t in tag]
 224             else:
 225                 tags_to_add.append(tag)
 226
 227         for tag_variable in self.tags_to_remove:
 228             tag = tag_variable.resolve(context)
 229             if iterable(tag):
 230                 tags_to_remove += [t for t in tag]
 231             else:
 232                 tags_to_remove.append(tag)
 233
 234         tag_slugs = [tag.url_chunk for tag in tags_to_add]
 235         for tag in tags_to_remove:
 236             try:
 237                 tag_slugs.remove(tag.url_chunk)
 238             except KeyError:
 239                 pass
 240
 241         if len(tag_slugs) > 0:
 242             return reverse('tagged_object_list', kwargs={'tags': '/'.join(tag_slugs)})
 243         else:
 244             return reverse('main_page')
 245
 246
 247 @register.inclusion_tag('catalogue/latest_blog_posts.html')
 248 def latest_blog_posts(feed_url, posts_to_show=5):
 249     try:
 250         feed = feedparser.parse(str(feed_url))
 251         posts = []
 252         for i in range(posts_to_show):
 253             pub_date = feed['entries'][i].updated_parsed
 254             published = datetime.date(pub_date[0], pub_date[1], pub_date[2] )
 255             posts.append({
 256                 'title': feed['entries'][i].title,
 257                 'summary': feed['entries'][i].summary,
 258                 'link': feed['entries'][i].link,
 259                 'date': published,
 260                 })
 261         return {'posts': posts}
 262     except:
 263         return {'posts': []}
 264
 265
 266 @register.inclusion_tag('catalogue/tag_list.html')
 267 def tag_list(tags, choices=None):
 268     if choices is None:
 269         choices = []
 270     if len(tags) == 1 and tags[0].category not in [t.category for t in choices]:
 271         one_tag = tags[0]
 272     return locals()
 273
 274
 275 @register.inclusion_tag('catalogue/inline_tag_list.html')
 276 def inline_tag_list(tags, choices=None):
 277     return tag_list(tags, choices)
 278
 279
 280 @register.inclusion_tag('catalogue/book_info.html')
 281 def book_info(book):
 282     return locals()
 283
 284
 285 @register.inclusion_tag('catalogue/book_wide.html', takes_context=True)
 286 def book_wide(context, book):
 287     theme_counter = book.theme_counter
 288     book_themes = Tag.objects.filter(pk__in=theme_counter.keys())
 289     for tag in book_themes:
 290         tag.count = theme_counter[tag.pk]
 291     extra_info = book.get_extra_info_value()
 292     hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
 293
 294     return {
 295         'book': book,
 296         'main_link': reverse('book_text', args=[book.slug]),
 297         'related': book.related_info(),
 298         'extra_info': book.get_extra_info_value(),
 299         'hide_about': hide_about,
 300         'themes': book_themes,
 301         'custom_pdf_form': forms.CustomPDFForm(),
 302         'request': context.get('request'),
 303     }
 304
 305
 306 @register.inclusion_tag('catalogue/book_short.html', takes_context=True)
 307 def book_short(context, book):
 308     return {
 309         'book': book,
 310         'main_link': book.get_absolute_url(),
 311         'related': book.related_info(),
 312         'request': context.get('request'),
 313     }
 314
 315
 316 @register.inclusion_tag('catalogue/book_mini_box.html')
 317 def book_mini(book):
 318     return {
 319         'book': book,
 320         'related': book.related_info(),
 321     }
 322
 323
 324 @register.inclusion_tag('catalogue/work-list.html', takes_context=True)
 325 def work_list(context, object_list):
 326     request = context.get('request')
 327     if object_list:
 328         object_type = type(object_list[0]).__name__
 329     return locals()
 330
 331
 332 @register.inclusion_tag('catalogue/fragment_promo.html')
 333 def fragment_promo(arg=None):
 334     if arg is None:
 335         fragments = Fragment.objects.all().order_by('?')
 336         fragment = fragments[0] if fragments.exists() else None
 337     elif isinstance(arg, Book):
 338         fragment = arg.choose_fragment()
 339     else:
 340         fragments = Fragment.tagged.with_all(arg).order_by('?')
 341         fragment = fragments[0] if fragments.exists() else None
 342
 343     return {
 344         'fragment': fragment,
 345     }
 346
 347
 348 @register.inclusion_tag('catalogue/related_books.html')
 349 def related_books(book, limit=6, random=1):
 350     cache_key = "catalogue.related_books.%d.%d" % (book.id, limit - random)
 351     related = cache.get(cache_key)
 352     if related is None:
 353         print 'not in cache'
 354         related = list(Book.objects.filter(
 355             common_slug=book.common_slug).exclude(pk=book.pk)[:limit])
 356         limit -= len(related)
 357         if limit > random:
 358             related += Book.tagged.related_to(book,
 359                     Book.objects.exclude(common_slug=book.common_slug),
 360                     ignore_by_tag=book.book_tag())[:limit-random]
 361         cache.set(cache_key, related, 1800)
 362     if random:
 363         related += list(Book.objects.exclude(
 364                         pk__in=[b.pk for b in related] + [book.pk]
 365                     ).order_by('?')[:random])
 366     return {
 367         'books': related,
 368     }
 369
 370
 371 @register.inclusion_tag('catalogue/menu.html')
 372 def catalogue_menu():
 373     tags = Tag.objects.filter(
 374             category__in=('author', 'epoch', 'genre', 'kind', 'theme')
 375         ).exclude(book_count=0)
 376     return split_tags(tags)
 377
 378
 379
 380 @register.simple_tag
 381 def tag_url(category, slug):
 382     return reverse('catalogue.views.tagged_object_list', args=[
 383         '/'.join((Tag.categories_dict[category], slug))
 384     ])