philo/contrib/penfield/models.py

   1 # encoding: utf-8
   2 from datetime import date, datetime
   3
   4 from django.conf import settings
   5 from django.conf.urls.defaults import url, patterns, include
   6 from django.db import models
   7 from django.http import Http404, HttpResponse
   8 from taggit.managers import TaggableManager
   9 from taggit.models import Tag, TaggedItem
  10
  11 from philo.contrib.winer.models import FeedView
  12 from philo.exceptions import ViewCanNotProvideSubpath
  13 from philo.models import Entity, Page, register_value_model
  14 from philo.models.fields import TemplateField
  15 from philo.utils import paginate
  16
  17
  18 class Blog(Entity):
  19         """Represents a blog which can be posted to."""
  20         #: The name of the :class:`Blog`, currently called 'title' for historical reasons.
  21         title = models.CharField(max_length=255)
  22
  23         #: A slug used to identify the :class:`Blog`.
  24         slug = models.SlugField(max_length=255)
  25
  26         def __unicode__(self):
  27                 return self.title
  28
  29         @property
  30         def entry_tags(self):
  31                 """Returns a :class:`QuerySet` of :class:`.Tag`\ s that are used on any entries in this blog."""
  32                 entry_pks = list(self.entries.values_list('pk', flat=True))
  33                 kwargs = {
  34                         '%s__object_id__in' % TaggedItem.tag_relname(): entry_pks
  35                 }
  36                 return TaggedItem.tags_for(BlogEntry).filter(**kwargs)
  37
  38         @property
  39         def entry_dates(self):
  40                 """Returns a dictionary of date :class:`QuerySet`\ s for years, months, and days for which there are entries."""
  41                 dates = {'year': self.entries.dates('date', 'year', order='DESC'), 'month': self.entries.dates('date', 'month', order='DESC'), 'day': self.entries.dates('date', 'day', order='DESC')}
  42                 return dates
  43
  44
  45 register_value_model(Blog)
  46
  47
  48 class BlogEntry(Entity):
  49         """Represents an entry in a :class:`Blog`."""
  50         #: The title of the :class:`BlogEntry`.
  51         title = models.CharField(max_length=255)
  52
  53         #: A slug which identifies the :class:`BlogEntry`.
  54         slug = models.SlugField(max_length=255)
  55
  56         #: The :class:`Blog` which this entry has been posted to. Can be left blank to represent a "draft" status.
  57         blog = models.ForeignKey(Blog, related_name='entries', blank=True, null=True)
  58
  59         #: A :class:`ForeignKey` to the author. The model is either :setting:`PHILO_PERSON_MODULE` or :class:`auth.User`.
  60         author = models.ForeignKey(getattr(settings, 'PHILO_PERSON_MODULE', 'auth.User'), related_name='blogentries')
  61
  62         #: The date and time which the :class:`BlogEntry` is considered posted at.
  63         date = models.DateTimeField(default=None)
  64
  65         #: The content of the :class:`BlogEntry`.
  66         content = TemplateField()
  67
  68         #: An optional brief excerpt from the :class:`BlogEntry`.
  69         excerpt = TemplateField(blank=True, null=True)
  70
  71         #: A ``django-taggit`` :class:`TaggableManager`.
  72         tags = TaggableManager()
  73
  74         def save(self, *args, **kwargs):
  75                 if self.date is None:
  76                         self.date = datetime.now()
  77                 super(BlogEntry, self).save(*args, **kwargs)
  78
  79         def __unicode__(self):
  80                 return self.title
  81
  82         class Meta:
  83                 ordering = ['-date']
  84                 verbose_name_plural = "blog entries"
  85                 get_latest_by = "date"
  86
  87
  88 register_value_model(BlogEntry)
  89
  90
  91 class BlogView(FeedView):
  92         """
  93         A subclass of :class:`.FeedView` which handles patterns and feeds for a :class:`Blog` and its related :class:`entries <BlogEntry>`.
  94
  95         """
  96         ENTRY_PERMALINK_STYLE_CHOICES = (
  97                 ('D', 'Year, month, and day'),
  98                 ('M', 'Year and month'),
  99                 ('Y', 'Year'),
 100                 ('B', 'Custom base'),
 101                 ('N', 'No base')
 102         )
 103
 104         #: The :class:`Blog` whose entries should be managed by this :class:`BlogView`
 105         blog = models.ForeignKey(Blog, related_name='blogviews')
 106
 107         #: The main page of the :class:`Blog` will be rendered with this :class:`.Page`.
 108         index_page = models.ForeignKey(Page, related_name='blog_index_related')
 109         #: The detail view of a :class:`BlogEntry` will be rendered with this :class:`Page`.
 110         entry_page = models.ForeignKey(Page, related_name='blog_entry_related')
 111         # TODO: entry_archive is misleading. Rename to ymd_page or timespan_page.
 112         #: Views of :class:`BlogEntry` archives will be rendered with this :class:`Page` (optional).
 113         entry_archive_page = models.ForeignKey(Page, related_name='blog_entry_archive_related', null=True, blank=True)
 114         #: Views of :class:`BlogEntry` archives according to their :class:`.Tag`\ s will be rendered with this :class:`Page`.
 115         tag_page = models.ForeignKey(Page, related_name='blog_tag_related')
 116         #: The archive of all available tags will be rendered with this :class:`Page` (optional).
 117         tag_archive_page = models.ForeignKey(Page, related_name='blog_tag_archive_related', null=True, blank=True)
 118         #: This number will be passed directly into pagination for :class:`BlogEntry` list pages. Pagination will be disabled if this is left blank.
 119         entries_per_page = models.IntegerField(blank=True, null=True)
 120
 121         #: Depending on the needs of the site, different permalink styles may be appropriate. Example subpaths are provided for a :class:`BlogEntry` posted on May 2nd, 2011 with a slug of "hello". The choices are:
 122         #:
 123         #:      * Year, month, and day - ``2011/05/02/hello``
 124         #:      * Year and month - ``2011/05/hello``
 125         #:      * Year - ``2011/hello``
 126         #:      * Custom base - :attr:`entry_permalink_base`\ ``/hello``
 127         #:      * No base - ``hello``
 128         entry_permalink_style = models.CharField(max_length=1, choices=ENTRY_PERMALINK_STYLE_CHOICES)
 129         #: If the :attr:`entry_permalink_style` is set to "Custom base" then the value of this field will be used as the base subpath for year/month/day entry archive pages and entry detail pages. Default: "entries"
 130         entry_permalink_base = models.CharField(max_length=255, blank=False, default='entries')
 131         #: This will be used as the base for the views of :attr:`tag_page` and :attr:`tag_archive_page`. Default: "tags"
 132         tag_permalink_base = models.CharField(max_length=255, blank=False, default='tags')
 133
 134         item_context_var = 'entries'
 135
 136         def __unicode__(self):
 137                 return u'BlogView for %s' % self.blog.title
 138
 139         def get_reverse_params(self, obj):
 140                 if isinstance(obj, BlogEntry):
 141                         if obj.blog_id == self.blog_id:
 142                                 kwargs = {'slug': obj.slug}
 143                                 if self.entry_permalink_style in 'DMY':
 144                                         kwargs.update({'year': str(obj.date.year).zfill(4)})
 145                                         if self.entry_permalink_style in 'DM':
 146                                                 kwargs.update({'month': str(obj.date.month).zfill(2)})
 147                                                 if self.entry_permalink_style == 'D':
 148                                                         kwargs.update({'day': str(obj.date.day).zfill(2)})
 149                                 return self.entry_view, [], kwargs
 150                 elif isinstance(obj, Tag) or (isinstance(obj, models.query.QuerySet) and obj.model == Tag and obj):
 151                         if isinstance(obj, Tag):
 152                                 obj = [obj]
 153                         slugs = [tag.slug for tag in obj if tag in self.get_tag_queryset(self.blog)]
 154                         if slugs:
 155                                 return 'entries_by_tag', [], {'tag_slugs': "/".join(slugs)}
 156                 elif isinstance(obj, (date, datetime)):
 157                         kwargs = {
 158                                 'year': str(obj.year).zfill(4),
 159                                 'month': str(obj.month).zfill(2),
 160                                 'day': str(obj.day).zfill(2)
 161                         }
 162                         return 'entries_by_day', [], kwargs
 163                 raise ViewCanNotProvideSubpath
 164
 165         @property
 166         def urlpatterns(self):
 167                 urlpatterns = self.feed_patterns(r'^', 'get_entries', 'index_page', 'index') +\
 168                         self.feed_patterns(r'^%s/(?P<tag_slugs>[-\w]+[-+/\w]*)' % self.tag_permalink_base, 'get_entries', 'tag_page', 'entries_by_tag')
 169
 170                 if self.tag_archive_page_id:
 171                         urlpatterns += patterns('',
 172                                 url((r'^%s$' % self.tag_permalink_base), self.tag_archive_view, name='tag_archive')
 173                         )
 174
 175                 if self.entry_archive_page_id:
 176                         if self.entry_permalink_style in 'DMY':
 177                                 urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})', 'get_entries', 'entry_archive_page', 'entries_by_year')
 178                                 if self.entry_permalink_style in 'DM':
 179                                         urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})/(?P<month>\d{2})', 'get_entries', 'entry_archive_page', 'entries_by_month')
 180                                         if self.entry_permalink_style == 'D':
 181                                                 urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})', 'get_entries', 'entry_archive_page', 'entries_by_day')
 182
 183                 if self.entry_permalink_style == 'D':
 184                         urlpatterns += patterns('',
 185                                 url(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>[-\w]+)$', self.entry_view)
 186                         )
 187                 elif self.entry_permalink_style == 'M':
 188                         urlpatterns += patterns('',
 189                                 url(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<slug>[-\w]+)$', self.entry_view)
 190                         )
 191                 elif self.entry_permalink_style == 'Y':
 192                         urlpatterns += patterns('',
 193                                 url(r'^(?P<year>\d{4})/(?P<slug>[-\w]+)$', self.entry_view)
 194                         )
 195                 elif self.entry_permalink_style == 'B':
 196                         urlpatterns += patterns('',
 197                                 url((r'^%s/(?P<slug>[-\w]+)$' % self.entry_permalink_base), self.entry_view)
 198                         )
 199                 else:
 200                         urlpatterns += patterns('',
 201                                 url(r'^(?P<slug>[-\w]+)$', self.entry_view)
 202                         )
 203                 return urlpatterns
 204
 205         def get_entry_queryset(self, obj):
 206                 """Returns the default :class:`QuerySet` of :class:`BlogEntry` instances for the :class:`BlogView` - all entries that are considered posted in the past. This allows for scheduled posting of entries."""
 207                 return obj.entries.filter(date__lte=datetime.now())
 208
 209         def get_tag_queryset(self, obj):
 210                 """Returns the default :class:`QuerySet` of :class:`.Tag`\ s for the :class:`BlogView`'s :meth:`get_entries_by_tag` and :meth:`tag_archive_view`."""
 211                 return obj.entry_tags
 212
 213         def get_object(self, request, year=None, month=None, day=None, tag_slugs=None):
 214                 """Returns a dictionary representing the parameters for a feed which will be exposed."""
 215                 if tag_slugs is None:
 216                         tags = None
 217                 else:
 218                         tag_slugs = tag_slugs.replace('+', '/').split('/')
 219                         tags = self.get_tag_queryset(self.blog).filter(slug__in=tag_slugs)
 220                         if not tags:
 221                                 raise Http404
 222
 223                         # Raise a 404 on an incorrect slug.
 224                         found_slugs = set([tag.slug for tag in tags])
 225                         for slug in tag_slugs:
 226                                 if slug and slug not in found_slugs:
 227                                         raise Http404
 228
 229                 try:
 230                         if year and month and day:
 231                                 context_date = date(int(year), int(month), int(day))
 232                         elif year and month:
 233                                 context_date = date(int(year), int(month), 1)
 234                         elif year:
 235                                 context_date = date(int(year), 1, 1)
 236                         else:
 237                                 context_date = None
 238                 except TypeError, ValueError:
 239                         context_date = None
 240
 241                 return {
 242                         'blog': self.blog,
 243                         'tags': tags,
 244                         'year': year,
 245                         'month': month,
 246                         'day': day,
 247                         'date': context_date
 248                 }
 249
 250         def get_entries(self, obj, request, year=None, month=None, day=None, tag_slugs=None, extra_context=None):
 251                 """Returns the :class:`BlogEntry` objects which will be exposed for the given object, as returned from :meth:`get_object`."""
 252                 entries = self.get_entry_queryset(obj['blog'])
 253
 254                 if obj['tags'] is not None:
 255                         tags = obj['tags']
 256                         for tag in tags:
 257                                 entries = entries.filter(tags=tag)
 258
 259                 if obj['date'] is not None:
 260                         if year:
 261                                 entries = entries.filter(date__year=year)
 262                         if month:
 263                                 entries = entries.filter(date__month=month)
 264                         if day:
 265                                 entries = entries.filter(date__day=day)
 266
 267                 context = extra_context or {}
 268                 context.update(obj)
 269
 270                 return entries, context
 271
 272         def entry_view(self, request, slug, year=None, month=None, day=None, extra_context=None):
 273                 """Renders :attr:`entry_page` with the entry specified by the given parameters."""
 274                 entries = self.get_entry_queryset(self.blog)
 275                 if year:
 276                         entries = entries.filter(date__year=year)
 277                 if month:
 278                         entries = entries.filter(date__month=month)
 279                 if day:
 280                         entries = entries.filter(date__day=day)
 281                 try:
 282                         entry = entries.get(slug=slug)
 283                 except:
 284                         raise Http404
 285                 context = self.get_context()
 286                 context.update(extra_context or {})
 287                 context.update({'entry': entry})
 288                 return self.entry_page.render_to_response(request, extra_context=context)
 289
 290         def tag_archive_view(self, request, extra_context=None):
 291                 """Renders :attr:`tag_archive_page` with the result of :meth:`get_tag_queryset` added to the context."""
 292                 if not self.tag_archive_page:
 293                         raise Http404
 294                 context = self.get_context()
 295                 context.update(extra_context or {})
 296                 context.update({
 297                         'tags': self.get_tag_queryset(self.blog)
 298                 })
 299                 return self.tag_archive_page.render_to_response(request, extra_context=context)
 300
 301         def process_page_items(self, request, items):
 302                 """Overrides :meth:`.FeedView.process_page_items` to add pagination."""
 303                 if self.entries_per_page:
 304                         page_num = request.GET.get('page', 1)
 305                         paginator, paginated_page, items = paginate(items, self.entries_per_page, page_num)
 306                         item_context = {
 307                                 'paginator': paginator,
 308                                 'paginated_page': paginated_page,
 309                                 self.item_context_var: items
 310                         }
 311                 else:
 312                         item_context = {
 313                                 self.item_context_var: items
 314                         }
 315                 return items, item_context
 316
 317         def title(self, obj):
 318                 title = obj['blog'].title
 319                 if obj['tags']:
 320                         title += u" – %s" % u", ".join((tag.name for tag in obj['tags']))
 321                 date = obj['date']
 322                 if date:
 323                         if obj['day']:
 324                                 datestr = date.strftime("%F %j, %Y")
 325                         elif obj['month']:
 326                                 datestr = date.strftime("%F, %Y")
 327                         elif obj['year']:
 328                                 datestr = date.strftime("%Y")
 329                         title += u" – %s" % datestr
 330                 return title
 331
 332         def categories(self, obj):
 333                 tags = obj['tags']
 334                 if tags:
 335                         return (tag.name for tag in tags)
 336                 return None
 337
 338         def item_title(self, item):
 339                 return item.title
 340
 341         def item_description(self, item):
 342                 return item.content
 343
 344         def item_author_name(self, item):
 345                 return item.author.get_full_name()
 346
 347         def item_pubdate(self, item):
 348                 return item.date
 349
 350         def item_categories(self, item):
 351                 return [tag.name for tag in item.tags.all()]
 352
 353
 354 class Newsletter(Entity):
 355         """Represents a newsletter which will contain :class:`articles <NewsletterArticle>` organized into :class:`issues <NewsletterIssue>`."""
 356         #: The name of the :class:`Newsletter`, currently callse 'title' for historical reasons.
 357         title = models.CharField(max_length=255)
 358         #: A slug used to identify the :class:`Newsletter`.
 359         slug = models.SlugField(max_length=255)
 360
 361         def __unicode__(self):
 362                 return self.title
 363
 364
 365 register_value_model(Newsletter)
 366
 367
 368 class NewsletterArticle(Entity):
 369         """Represents an article in a :class:`Newsletter`"""
 370         #: The title of the :class:`NewsletterArticle`.
 371         title = models.CharField(max_length=255)
 372         #: A slug which identifies the :class:`NewsletterArticle`.
 373         slug = models.SlugField(max_length=255)
 374         #: A :class:`ForeignKey` to :class:`Newsletter` representing the newsletter which this article was written for.
 375         newsletter = models.ForeignKey(Newsletter, related_name='articles')
 376         #: A :class:`ManyToManyField` to the author(s) of the :class:`NewsletterArticle`. The model is either :setting:`PHILO_PERSON_MODULE` or :class:`auth.User`.
 377         authors = models.ManyToManyField(getattr(settings, 'PHILO_PERSON_MODULE', 'auth.User'), related_name='newsletterarticles')
 378         #: The date and time which the :class:`NewsletterArticle` is considered published at.
 379         date = models.DateTimeField(default=None)
 380         #: A :class:`.TemplateField` containing an optional short summary of the article, meant to grab a reader's attention and draw them in.
 381         lede = TemplateField(null=True, blank=True, verbose_name='Summary')
 382         #: A :class:`.TemplateField` containing the full text of the article.
 383         full_text = TemplateField(db_index=True)
 384         #: A ``django-taggit`` :class:`TaggableManager`.
 385         tags = TaggableManager()
 386
 387         def save(self, *args, **kwargs):
 388                 if self.date is None:
 389                         self.date = datetime.now()
 390                 super(NewsletterArticle, self).save(*args, **kwargs)
 391
 392         def __unicode__(self):
 393                 return self.title
 394
 395         class Meta:
 396                 get_latest_by = 'date'
 397                 ordering = ['-date']
 398                 unique_together = (('newsletter', 'slug'),)
 399
 400
 401 register_value_model(NewsletterArticle)
 402
 403
 404 class NewsletterIssue(Entity):
 405         """Represents an issue of the newsletter."""
 406         #: The title of the :class:`NewsletterIssue`.
 407         title = models.CharField(max_length=255)
 408         #: A slug which identifies the :class:`NewsletterIssue`.
 409         slug = models.SlugField(max_length=255)
 410         #: A :class:`ForeignKey` to the :class:`Newsletter` which this issue belongs to.
 411         newsletter = models.ForeignKey(Newsletter, related_name='issues')
 412         #: The numbering of the issue - for example, 04.02 for volume 4, issue 2. This is an instance of :class:`CharField` to allow any arbitrary numbering system.
 413         numbering = models.CharField(max_length=50, help_text='For example, 04.02 for volume 4, issue 2.')
 414         #: A :class:`ManyToManyField` to articles belonging to this issue.
 415         articles = models.ManyToManyField(NewsletterArticle, related_name='issues')
 416
 417         def __unicode__(self):
 418                 return self.title
 419
 420         class Meta:
 421                 ordering = ['-numbering']
 422                 unique_together = (('newsletter', 'numbering'),)
 423
 424
 425 register_value_model(NewsletterIssue)
 426
 427
 428 class NewsletterView(FeedView):
 429         """A subclass of :class:`.FeedView` which handles patterns and feeds for a :class:`Newsletter` and its related :class:`articles <NewsletterArticle>`."""
 430         ARTICLE_PERMALINK_STYLE_CHOICES = (
 431                 ('D', 'Year, month, and day'),
 432                 ('M', 'Year and month'),
 433                 ('Y', 'Year'),
 434                 ('S', 'Slug only')
 435         )
 436
 437         #: A :class:`ForeignKey` to the :class:`Newsletter` managed by this :class:`NewsletterView`.
 438         newsletter = models.ForeignKey(Newsletter, related_name='newsletterviews')
 439
 440         #: A :class:`ForeignKey` to the :class:`Page` used to render the main page of this :class:`NewsletterView`.
 441         index_page = models.ForeignKey(Page, related_name='newsletter_index_related')
 442         #: A :class:`ForeignKey` to the :class:`Page` used to render the detail view of a :class:`NewsletterArticle` for this :class:`NewsletterView`.
 443         article_page = models.ForeignKey(Page, related_name='newsletter_article_related')
 444         #: A :class:`ForeignKey` to the :class:`Page` used to render the :class:`NewsletterArticle` archive pages for this :class:`NewsletterView`.
 445         article_archive_page = models.ForeignKey(Page, related_name='newsletter_article_archive_related', null=True, blank=True)
 446         #: A :class:`ForeignKey` to the :class:`Page` used to render the detail view of a :class:`NewsletterIssue` for this :class:`NewsletterView`.
 447         issue_page = models.ForeignKey(Page, related_name='newsletter_issue_related')
 448         #: A :class:`ForeignKey` to the :class:`Page` used to render the :class:`NewsletterIssue` archive pages for this :class:`NewsletterView`.
 449         issue_archive_page = models.ForeignKey(Page, related_name='newsletter_issue_archive_related', null=True, blank=True)
 450
 451         #: Depending on the needs of the site, different permalink styles may be appropriate. Example subpaths are provided for a :class:`NewsletterArticle` posted on May 2nd, 2011 with a slug of "hello". The choices are:
 452         #:
 453         #:      * Year, month, and day - :attr:`article_permalink_base`\ ``/2011/05/02/hello``
 454         #:      * Year and month - :attr:`article_permalink_base`\ ``/2011/05/hello``
 455         #:      * Year - :attr:`article_permalink_base`\ ``/2011/hello``
 456         #:      * Slug only - :attr:`article_permalink_base`\ ``/hello``
 457         article_permalink_style = models.CharField(max_length=1, choices=ARTICLE_PERMALINK_STYLE_CHOICES)
 458         #: This will be used as the base subpath for year/month/day article archive pages and article detail pages. Default: "articles"
 459         article_permalink_base = models.CharField(max_length=255, blank=False, default='articles')
 460         #: This will be used as the base subpath for issue detail pages and the issue archive page.
 461         issue_permalink_base = models.CharField(max_length=255, blank=False, default='issues')
 462
 463         item_context_var = 'articles'
 464         object_attr = 'newsletter'
 465
 466         def __unicode__(self):
 467                 return "NewsletterView for %s" % self.newsletter.__unicode__()
 468
 469         def get_reverse_params(self, obj):
 470                 if isinstance(obj, NewsletterArticle):
 471                         if obj.newsletter_id == self.newsletter_id:
 472                                 kwargs = {'slug': obj.slug}
 473                                 if self.article_permalink_style in 'DMY':
 474                                         kwargs.update({'year': str(obj.date.year).zfill(4)})
 475                                         if self.article_permalink_style in 'DM':
 476                                                 kwargs.update({'month': str(obj.date.month).zfill(2)})
 477                                                 if self.article_permalink_style == 'D':
 478                                                         kwargs.update({'day': str(obj.date.day).zfill(2)})
 479                                 return self.article_view, [], kwargs
 480                 elif isinstance(obj, NewsletterIssue):
 481                         if obj.newsletter_id == self.newsletter_id:
 482                                 return 'issue', [], {'numbering': obj.numbering}
 483                 elif isinstance(obj, (date, datetime)):
 484                         kwargs = {
 485                                 'year': str(obj.year).zfill(4),
 486                                 'month': str(obj.month).zfill(2),
 487                                 'day': str(obj.day).zfill(2)
 488                         }
 489                         return 'articles_by_day', [], kwargs
 490                 raise ViewCanNotProvideSubpath
 491
 492         @property
 493         def urlpatterns(self):
 494                 urlpatterns = self.feed_patterns(r'^', 'get_all_articles', 'index_page', 'index') + patterns('',
 495                         url(r'^%s/(?P<numbering>.+)$' % self.issue_permalink_base, self.page_view('get_articles_by_issue', 'issue_page'), name='issue')
 496                 )
 497                 if self.issue_archive_page_id:
 498                         urlpatterns += patterns('',
 499                                 url(r'^%s$' % self.issue_permalink_base, self.issue_archive_view, 'issue_archive')
 500                         )
 501                 if self.article_archive_page_id:
 502                         urlpatterns += self.feed_patterns(r'^%s' % self.article_permalink_base, 'get_all_articles', 'article_archive_page', 'articles')
 503                         if self.article_permalink_style in 'DMY':
 504                                 urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_year')
 505                                 if self.article_permalink_style in 'DM':
 506                                         urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_month')
 507                                         if self.article_permalink_style == 'D':
 508                                                 urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_day')
 509
 510                 if self.article_permalink_style == 'Y':
 511                         urlpatterns += patterns('',
 512                                 url(r'^%s/(?P<year>\d{4})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 513                         )
 514                 elif self.article_permalink_style == 'M':
 515                         urlpatterns += patterns('',
 516                                 url(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 517                         )
 518                 elif self.article_permalink_style == 'D':
 519                         urlpatterns += patterns('',
 520                                 url(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 521                         )
 522                 else:
 523                         urlpatterns += patterns('',
 524                                 url(r'^%s/(?P<slug>[-\w]+)$' % self.article_permalink_base, self.article_view)
 525                         )
 526
 527                 return urlpatterns
 528
 529         def get_context(self):
 530                 return {'newsletter': self.newsletter}
 531
 532         def get_article_queryset(self, obj):
 533                 """Returns the default :class:`QuerySet` of :class:`NewsletterArticle` instances for the :class:`NewsletterView` - all articles that are considered posted in the past. This allows for scheduled posting of articles."""
 534                 return obj.articles.filter(date__lte=datetime.now())
 535
 536         def get_issue_queryset(self, obj):
 537                 """Returns the default :class:`QuerySet` of :class:`NewsletterIssue` instances for the :class:`NewsletterView`."""
 538                 return obj.issues.all()
 539
 540         def get_all_articles(self, obj, request, extra_context=None):
 541                 """Used to generate :meth:`~.FeedView.feed_patterns` for all entries."""
 542                 return self.get_article_queryset(obj), extra_context
 543
 544         def get_articles_by_ymd(self, obj, request, year, month=None, day=None, extra_context=None):
 545                 """Used to generate :meth:`~.FeedView.feed_patterns` for a specific year, month, and day."""
 546                 articles = self.get_article_queryset(obj).filter(date__year=year)
 547                 if month:
 548                         articles = articles.filter(date__month=month)
 549                 if day:
 550                         articles = articles.filter(date__day=day)
 551                 return articles, extra_context
 552
 553         def get_articles_by_issue(self, obj, request, numbering, extra_context=None):
 554                 """Used to generate :meth:`~.FeedView.feed_patterns` for articles from a certain issue."""
 555                 try:
 556                         issue = self.get_issue_queryset(obj).get(numbering=numbering)
 557                 except NewsletterIssue.DoesNotExist:
 558                         raise Http404
 559                 context = extra_context or {}
 560                 context.update({'issue': issue})
 561                 return self.get_article_queryset(obj).filter(issues=issue), context
 562
 563         def article_view(self, request, slug, year=None, month=None, day=None, extra_context=None):
 564                 """Renders :attr:`article_page` with the article specified by the given parameters."""
 565                 articles = self.get_article_queryset(self.newsletter)
 566                 if year:
 567                         articles = articles.filter(date__year=year)
 568                 if month:
 569                         articles = articles.filter(date__month=month)
 570                 if day:
 571                         articles = articles.filter(date__day=day)
 572                 try:
 573                         article = articles.get(slug=slug)
 574                 except NewsletterArticle.DoesNotExist:
 575                         raise Http404
 576                 context = self.get_context()
 577                 context.update(extra_context or {})
 578                 context.update({'article': article})
 579                 return self.article_page.render_to_response(request, extra_context=context)
 580
 581         def issue_archive_view(self, request, extra_context):
 582                 """Renders :attr:`issue_archive_page` with the result of :meth:`get_issue_queryset` added to the context."""
 583                 if not self.issue_archive_page:
 584                         raise Http404
 585                 context = self.get_context()
 586                 context.update(extra_context or {})
 587                 context.update({
 588                         'issues': self.get_issue_queryset(self.newsletter)
 589                 })
 590                 return self.issue_archive_page.render_to_response(request, extra_context=context)
 591
 592         def title(self, obj):
 593                 return obj.title
 594
 595         def item_title(self, item):
 596                 return item.title
 597
 598         def item_description(self, item):
 599                 return item.full_text
 600
 601         def item_author_name(self, item):
 602                 authors = list(item.authors.all())
 603                 if len(authors) > 1:
 604                         return "%s and %s" % (", ".join([author.get_full_name() for author in authors[:-1]]), authors[-1].get_full_name())
 605                 elif authors:
 606                         return authors[0].get_full_name()
 607                 else:
 608                         return ''
 609
 610         def item_pubdate(self, item):
 611                 return item.date
 612
 613         def item_categories(self, item):
 614                 return [tag.name for tag in item.tags.all()]