apps/wiki/templatetags/wiki.py

   1 from __future__ import absolute_import
   2
   3 from django.db.models import Count
   4 from django.core.urlresolvers import reverse
   5 from django.contrib.comments.models import Comment
   6 from django.template.defaultfilters import stringfilter
   7 from django import template
   8 from django.utils.translation import ugettext as _
   9
  10 from wiki.models import Book, Chunk
  11
  12 register = template.Library()
  13
  14
  15 class Tab(object):
  16     slug = None
  17     caption = None
  18     url = None
  19
  20     def __init__(self, slug, caption, url):
  21         self.slug = slug
  22         self.caption = caption
  23         self.url = url
  24
  25
  26 @register.inclusion_tag("wiki/main_tabs.html", takes_context=True)
  27 def main_tabs(context):
  28     active = getattr(context['request'], 'wiki_active_tab', None)
  29
  30     tabs = []
  31     user = context['user']
  32     if user.is_authenticated():
  33         tabs.append(Tab('my', _('Assigned to me'), reverse("wiki_user")))
  34
  35     tabs.append(Tab('unassigned', _('Unassigned'), reverse("wiki_unassigned")))
  36     tabs.append(Tab('users', _('Users'), reverse("wiki_users")))
  37     tabs.append(Tab('all', _('All'), reverse("wiki_document_list")))
  38     tabs.append(Tab('create', _('Add'), reverse("wiki_create_missing")))
  39     tabs.append(Tab('upload', _('Upload'), reverse("wiki_upload")))
  40
  41     if user.is_staff:
  42         tabs.append(Tab('admin', _('Admin'), reverse("admin:index")))
  43
  44     return {"tabs": tabs, "active_tab": active}
  45
  46
  47 class WallItem(object):
  48     title = ''
  49     summary = ''
  50     url = ''
  51     timestamp = ''
  52     user = None
  53     email = ''
  54
  55     def __init__(self, tag):
  56         self.tag = tag
  57
  58     def get_email(self):
  59         if self.user:
  60             return self.user.email
  61         else:
  62             return self.email
  63
  64
  65 def changes_wall(max_len):
  66     qs = Chunk.change_model.objects.filter(revision__gt=-1).order_by('-created_at')
  67     qs = qs.defer('patch')
  68     qs = qs.select_related('author', 'tree')
  69     #qs = qs.annotate(book_length=Count('chunk__book__chunk'))
  70     qs = qs[:max_len]
  71     for item in qs:
  72         tag = 'stage' if item.tags.count() else 'change'
  73         chunk = item.tree
  74         w  = WallItem(tag)
  75         w.title = chunk.pretty_name()
  76         w.summary = item.description
  77         w.url = reverse('wiki_editor',
  78                 args=[chunk.book.slug, chunk.slug]) + '?diff=%d' % item.revision
  79         w.timestamp = item.created_at
  80         w.user = item.author
  81         w.email = item.author_email
  82         yield w
  83
  84
  85 def published_wall(max_len):
  86     qs = Book.objects.exclude(last_published=None).order_by('-last_published')
  87     qs = qs[:max_len]
  88     for item in qs:
  89         w  = WallItem('publish')
  90         w.title = item.title
  91         w.summary = item.title
  92         w.url = chunk.book.get_absolute_url()
  93         w.timestamp = item.last_published
  94         w.user = item.last_published_by
  95         yield w
  96
  97
  98 def comments_wall(max_len):
  99     qs = Comment.objects.filter(is_public=True).select_related().order_by('-submit_date')
 100     qs = qs[:max_len]
 101     for item in qs:
 102         w  = WallItem('comment')
 103         w.title = item.content_object
 104         w.summary = item.comment
 105         w.url = item.content_object.get_absolute_url()
 106         w.timestamp = item.submit_date
 107         w.user = item.user
 108         w.email = item.user_email
 109         yield w
 110
 111
 112 def big_wall(max_len, *args):
 113     """
 114         Takes some WallItem iterators and zips them into one big wall.
 115         Input iterators must already be sorted by timestamp.
 116     """
 117     subwalls = []
 118     for w in args:
 119         try:
 120             subwalls.append([next(w), w])
 121         except StopIteration:
 122             pass
 123
 124     while max_len and subwalls:
 125         i, next_item = max(enumerate(subwalls), key=lambda x: x[1][0].timestamp)
 126         yield next_item[0]
 127         max_len -= 1
 128         try:
 129             next_item[0] = next(next_item[1])
 130         except StopIteration:
 131             del subwalls[i]
 132
 133
 134 @register.inclusion_tag("wiki/wall.html", takes_context=True)
 135 def wall(context, max_len=10):
 136     return {
 137         "request": context['request'],
 138         "STATIC_URL": context['STATIC_URL'],
 139         "wall": big_wall(max_len,
 140             changes_wall(max_len),
 141             published_wall(max_len),
 142             comments_wall(max_len),
 143         )}