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annotate gpp/forums/subscriptions.py @ 192:341759e1cda1

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Implementing #67: use a denormalized count field on download categories to reduce database queries.
author Brian Neal <bgneal@gmail.com>
date Sat, 03 Apr 2010 01:10:00 +0000
parents 500e5875a306
children
rev   line source
bgneal@181 1 """This module handles the subscriptions of users to forum topics."""
bgneal@181 2 from django.conf import settings
bgneal@181 3 from django.contrib.auth.decorators import login_required
bgneal@181 4 from django.contrib.sites.models import Site
bgneal@181 5 from django.core.paginator import InvalidPage
bgneal@181 6 from django.core.urlresolvers import reverse
bgneal@181 7 from django.http import HttpResponseRedirect
bgneal@181 8 from django.http import Http404
bgneal@181 9 from django.template.loader import render_to_string
bgneal@181 10 from django.shortcuts import get_object_or_404
bgneal@181 11 from django.shortcuts import render_to_response
bgneal@181 12 from django.template import RequestContext
bgneal@181 13 from django.views.decorators.http import require_POST
bgneal@181 14
bgneal@181 15 from forums.models import Topic
bgneal@181 16 from core.functions import send_mail
bgneal@181 17 from core.paginator import DiggPaginator
bgneal@181 18
bgneal@181 19
bgneal@181 20 def notify_topic_subscribers(post):
bgneal@181 21 """The argument post is a newly created post. Send out an email
bgneal@181 22 notification to all subscribers of the post's parent Topic."""
bgneal@181 23
bgneal@181 24 topic = post.topic
bgneal@181 25 recipients = topic.subscribers.exclude(
bgneal@181 26 id=post.user.id).values_list('email', flat=True)
bgneal@181 27
bgneal@181 28 if recipients:
bgneal@181 29 site = Site.objects.get_current()
bgneal@181 30 subject = "[%s] Topic Reply: %s" % (site.name, topic.name)
bgneal@181 31 url_prefix = "http://%s" % site.domain
bgneal@181 32 post_url = url_prefix + post.get_absolute_url()
bgneal@181 33 unsubscribe_url = url_prefix + reverse("forums-manage_subscriptions")
bgneal@181 34 msg = render_to_string("forums/topic_notify_email.txt", {
bgneal@181 35 'poster': post.user.username,
bgneal@181 36 'topic_name': topic.name,
bgneal@181 37 'message': post.body,
bgneal@181 38 'post_url': post_url,
bgneal@181 39 'unsubscribe_url': unsubscribe_url,
bgneal@181 40 })
bgneal@181 41 for recipient in recipients:
bgneal@181 42 send_mail(subject, msg, settings.DEFAULT_FROM_EMAIL, [recipient])
bgneal@181 43
bgneal@181 44
bgneal@181 45 @login_required
bgneal@181 46 @require_POST
bgneal@181 47 def subscribe_topic(request, topic_id):
bgneal@181 48 """Subscribe the user to the requested topic."""
bgneal@181 49 topic = get_object_or_404(Topic.objects.select_related(), id=topic_id)
bgneal@181 50 if topic.forum.category.can_access(request.user):
bgneal@181 51 topic.subscribers.add(request.user)
bgneal@181 52 return HttpResponseRedirect(
bgneal@181 53 reverse("forums-subscription_status", args=[topic.id]))
bgneal@181 54 raise Http404
bgneal@181 55
bgneal@181 56
bgneal@181 57 @login_required
bgneal@181 58 @require_POST
bgneal@181 59 def unsubscribe_topic(request, topic_id):
bgneal@181 60 """Unsubscribe the user to the requested topic."""
bgneal@181 61 topic = get_object_or_404(Topic, id=topic_id)
bgneal@181 62 topic.subscribers.remove(request.user)
bgneal@181 63 return HttpResponseRedirect(
bgneal@181 64 reverse("forums-subscription_status", args=[topic.id]))
bgneal@181 65
bgneal@181 66
bgneal@181 67 @login_required
bgneal@181 68 def subscription_status(request, topic_id):
bgneal@181 69 """Display the subscription status for the given topic."""
bgneal@181 70 topic = get_object_or_404(Topic.objects.select_related(), id=topic_id)
bgneal@181 71 is_subscribed = request.user in topic.subscribers.all()
bgneal@181 72 return render_to_response('forums/subscription_status.html', {
bgneal@181 73 'topic': topic,
bgneal@181 74 'is_subscribed': is_subscribed,
bgneal@181 75 },
bgneal@181 76 context_instance=RequestContext(request))
bgneal@181 77
bgneal@181 78
bgneal@181 79 @login_required
bgneal@181 80 def manage_subscriptions(request):
bgneal@181 81 """Display a user's topic subscriptions, and allow them to be deleted."""
bgneal@181 82
bgneal@181 83 user = request.user
bgneal@181 84 if request.method == "POST":
bgneal@181 85 if request.POST.get('delete_all'):
bgneal@181 86 user.subscriptions.clear()
bgneal@181 87 else:
bgneal@181 88 delete_ids = request.POST.getlist('delete_ids')
bgneal@181 89 try:
bgneal@181 90 delete_ids = [int(id) for id in delete_ids]
bgneal@181 91 except ValueError:
bgneal@181 92 raise Http404
bgneal@181 93 for topic in user.subscriptions.filter(id__in=delete_ids):
bgneal@181 94 user.subscriptions.remove(topic)
bgneal@181 95
bgneal@181 96 page_num = request.POST.get('page', 1)
bgneal@181 97 else:
bgneal@181 98 page_num = request.GET.get('page', 1)
bgneal@181 99
bgneal@181 100 topics = user.subscriptions.select_related().order_by('-creation_date')
bgneal@181 101 paginator = DiggPaginator(topics, 20, body=5, tail=2, margin=3, padding=2)
bgneal@181 102 try:
bgneal@181 103 page_num = int(page_num)
bgneal@181 104 except ValueError:
bgneal@181 105 page_num = 1
bgneal@181 106 try:
bgneal@181 107 page = paginator.page(page_num)
bgneal@181 108 except InvalidPage:
bgneal@181 109 raise Http404
bgneal@181 110
bgneal@181 111 return render_to_response('forums/manage_subscriptions.html', {
bgneal@181 112 'page': page,
bgneal@181 113 },
bgneal@181 114 context_instance=RequestContext(request))