apps/catalogue/templatetags/catalogue.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 catalogue.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("catalogue/main_tabs.html", takes_context=True)
  27 def main_tabs(context):
  28     active = getattr(context['request'], 'catalogue_active_tab', None)
  29
  30     tabs = []
  31     user = context['user']
  32     if user.is_authenticated():
  33         tabs.append(Tab('my', _('My page'), reverse("catalogue_user")))
  34
  35     tabs.append(Tab('unassigned', _('Unassigned'), reverse("catalogue_unassigned")))
  36     tabs.append(Tab('users', _('Users'), reverse("catalogue_users")))
  37     tabs.append(Tab('create', _('Add'), reverse("catalogue_create_missing")))
  38     tabs.append(Tab('upload', _('Upload'), reverse("catalogue_upload")))
  39
  40     if user.is_staff:
  41         tabs.append(Tab('admin', _('Admin'), reverse("admin:index")))
  42
  43     return {"tabs": tabs, "active_tab": active}
  44
  45
  46 class WallItem(object):
  47     title = ''
  48     summary = ''
  49     url = ''
  50     timestamp = ''
  51     user = None
  52     email = ''
  53
  54     def __init__(self, tag):
  55         self.tag = tag
  56
  57     def get_email(self):
  58         if self.user:
  59             return self.user.email
  60         else:
  61             return self.email
  62
  63
  64 def changes_wall(max_len):
  65     qs = Chunk.change_model.objects.filter(revision__gt=-1).order_by('-created_at')
  66     qs = qs.defer('patch')
  67     qs = qs.select_related('author', 'tree', 'tree__book__title')
  68     qs = qs[:max_len]
  69     for item in qs:
  70         tag = 'stage' if item.tags.count() else 'change'
  71         chunk = item.tree
  72         w  = WallItem(tag)
  73         w.title = chunk.pretty_name()
  74         w.summary = item.description
  75         w.url = reverse('wiki_editor',
  76                 args=[chunk.book.slug, chunk.slug]) + '?diff=%d' % item.revision
  77         w.timestamp = item.created_at
  78         w.user = item.author
  79         w.email = item.author_email
  80         yield w
  81
  82
  83 def published_wall(max_len):
  84     qs = Book.objects.exclude(last_published=None).order_by('-last_published')
  85     qs = qs[:max_len]
  86     for item in qs:
  87         w  = WallItem('publish')
  88         w.title = item.title
  89         w.summary = item.title
  90         w.url = chunk.book.get_absolute_url()
  91         w.timestamp = item.last_published
  92         w.user = item.last_published_by
  93         yield w
  94
  95
  96 def comments_wall(max_len):
  97     qs = Comment.objects.filter(is_public=True).select_related().order_by('-submit_date')
  98     qs = qs[:max_len]
  99     for item in qs:
 100         w  = WallItem('comment')
 101         w.title = item.content_object
 102         w.summary = item.comment
 103         w.url = item.content_object.get_absolute_url()
 104         w.timestamp = item.submit_date
 105         w.user = item.user
 106         w.email = item.user_email
 107         yield w
 108
 109
 110 def big_wall(max_len, *args):
 111     """
 112         Takes some WallItem iterators and zips them into one big wall.
 113         Input iterators must already be sorted by timestamp.
 114     """
 115     subwalls = []
 116     for w in args:
 117         try:
 118             subwalls.append([next(w), w])
 119         except StopIteration:
 120             pass
 121
 122     while max_len and subwalls:
 123         i, next_item = max(enumerate(subwalls), key=lambda x: x[1][0].timestamp)
 124         yield next_item[0]
 125         max_len -= 1
 126         try:
 127             next_item[0] = next(next_item[1])
 128         except StopIteration:
 129             del subwalls[i]
 130
 131
 132 @register.inclusion_tag("catalogue/wall.html", takes_context=True)
 133 def wall(context, max_len=10):
 134     return {
 135         "request": context['request'],
 136         "STATIC_URL": context['STATIC_URL'],
 137         "wall": big_wall(max_len,
 138             changes_wall(max_len),
 139             published_wall(max_len),
 140             comments_wall(max_len),
 141         )}