Code layout change.

[wolnelektury.git] / src / social / templatetags / social_tags.py

diff --git a/src/social/templatetags/social_tags.py b/src/social/templatetags/social_tags.py
new file mode 100755 (executable)
index 0000000..7065467
--- /dev/null
+++ b/src/social/templatetags/social_tags.py
@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from random import randint
+from django.db.models import Q
+from django import template
+from django.utils.functional import lazy
+from django.utils.cache import add_never_cache_headers
+from catalogue.models import Book, Tag
+from ssify import ssi_variable
+from ssify.utils import ssi_vary_on_cookie
+from social.models import Cite
+from social.utils import likes, cites_for_tags
+
+register = template.Library()
+
+
+@ssi_variable(register, patch_response=[ssi_vary_on_cookie])
+def likes_book(request, book_id):
+    return likes(request.user, Book.objects.get(pk=book_id), request)
+
+
+def choose_cite(request, book_id=None, tag_ids=None):
+    """Choose a cite for main page, for book or for set of tags."""
+    try:
+        assert request.user.is_staff
+        assert 'choose_cite' in request.GET
+        cite = Cite.objects.get(pk=request.GET['choose_cite'])
+    except (AssertionError, Cite.DoesNotExist):
+        if book_id is not None:
+            cites = Cite.objects.filter(Q(book=book_id) | Q(book__ancestor=book_id))
+        elif tag_ids is not None:
+            tags = Tag.objects.filter(pk__in=tag_ids)
+            cites = cites_for_tags(tags)
+        else:
+            cites = Cite.objects.all()
+        stickies = cites.filter(sticky=True)
+        count = stickies.count()
+        if count:
+            cite = stickies[randint(0, count - 1)]
+        else:
+            count = cites.count()
+            if count:
+                cite = cites[randint(0, count - 1)]
+            else:
+                cite = None
+    return cite
+
+
+@ssi_variable(register, name='choose_cite', patch_response=[add_never_cache_headers])
+def choose_cite_tag(request, book_id=None, tag_ids=None):
+    cite = choose_cite(request, book_id, tag_ids)
+    return cite.pk if cite is not None else None
+
+
+@register.inclusion_tag('social/cite_promo.html')
+def render_cite(cite):
+    return {
+        'cite': cite,
+    }
+
+
+@ssi_variable(register, patch_response=[ssi_vary_on_cookie])
+def book_shelf_tags(request, book_id):
+    if not request.user.is_authenticated():
+        return None
+    book = Book.objects.get(pk=book_id)
+    lks = likes(request.user, book, request)
+    def get_value():
+        if not lks:
+            return ''
+        tags = book.tags.filter(category='set', user=request.user).exclude(name='')
+        if not tags:
+            return ''
+        ctx = {'tags': tags}
+        return template.loader.render_to_string('social/shelf_tags.html', ctx)
+    return lazy(get_value, unicode)()