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bgneal@232
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1 """This module handles the subscriptions of users to forum topics."""
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bgneal@232
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2 from django.conf import settings
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bgneal@232
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3 from django.contrib.auth.decorators import login_required
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4 from django.contrib.sites.models import Site
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5 from django.core.paginator import InvalidPage
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6 from django.core.urlresolvers import reverse
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7 from django.http import HttpResponseRedirect
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8 from django.http import Http404
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9 from django.template.loader import render_to_string
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10 from django.shortcuts import get_object_or_404
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bgneal@1032
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11 from django.shortcuts import render
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12 from django.views.decorators.http import require_POST
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13
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14 from forums.models import Topic
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bgneal@459
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15 import forums.permissions as perms
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16 from core.functions import send_mail
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17 from core.paginator import DiggPaginator
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18
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19
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20 def notify_topic_subscribers(post, defer=True):
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bgneal@301
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21 """
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22 The argument post is a newly created post. Send out an email
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23 notification to all subscribers of the post's parent Topic.
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24
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25 The defer flag is passed to core.functions.send_mail. If True, the mail is
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26 sent on a Celery task. If False, the mail is sent on the caller's thread.
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27 """
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28 topic = post.topic
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29 recipients = topic.subscribers.exclude(id=post.user.id).values_list(
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30 'email', flat=True)
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31
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32 if recipients:
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33 site = Site.objects.get_current()
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34 subject = "[%s] Topic Reply: %s" % (site.name, topic.name)
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35 url_prefix = "%s://%s" % (settings.SITE_SCHEME, site.domain)
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36 post_url = url_prefix + post.get_absolute_url()
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37 unsubscribe_url = url_prefix + reverse("forums-manage_subscriptions")
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38 msg = render_to_string("forums/topic_notify_email.txt", {
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39 'poster': post.user.username,
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40 'topic_name': topic.name,
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41 'message': post.body,
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42 'post_url': post_url,
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43 'unsubscribe_url': unsubscribe_url,
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44 })
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45 for recipient in recipients:
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46 send_mail(subject, msg, settings.DEFAULT_FROM_EMAIL, [recipient],
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47 defer=defer)
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48
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49
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50 @login_required
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51 @require_POST
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bgneal@232
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52 def subscribe_topic(request, topic_id):
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bgneal@232
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53 """Subscribe the user to the requested topic."""
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bgneal@232
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54 topic = get_object_or_404(Topic.objects.select_related(), id=topic_id)
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55 if perms.can_access(topic.forum.category, request.user):
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56 topic.subscribers.add(request.user)
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57 return HttpResponseRedirect(
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58 reverse("forums-subscription_status", args=[topic.id]))
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bgneal@386
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59 raise Http404
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60
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61
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62 @login_required
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63 @require_POST
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64 def unsubscribe_topic(request, topic_id):
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bgneal@232
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65 """Unsubscribe the user to the requested topic."""
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66 topic = get_object_or_404(Topic, id=topic_id)
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67 topic.subscribers.remove(request.user)
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68 return HttpResponseRedirect(
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69 reverse("forums-subscription_status", args=[topic.id]))
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70
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71
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72 @login_required
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73 def subscription_status(request, topic_id):
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bgneal@232
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74 """Display the subscription status for the given topic."""
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bgneal@232
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75 topic = get_object_or_404(Topic.objects.select_related(), id=topic_id)
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76 is_subscribed = request.user in topic.subscribers.all()
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77 return render(request, 'forums/subscription_status.html', {
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78 'topic': topic,
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79 'is_subscribed': is_subscribed,
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80 })
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81
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82
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83 @login_required
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bgneal@232
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84 def manage_subscriptions(request):
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bgneal@232
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85 """Display a user's topic subscriptions, and allow them to be deleted."""
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86
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87 user = request.user
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88 if request.method == "POST":
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89 if request.POST.get('delete_all'):
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90 user.subscriptions.clear()
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91 else:
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92 delete_ids = request.POST.getlist('delete_ids')
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93 try:
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94 delete_ids = [int(id) for id in delete_ids]
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95 except ValueError:
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96 raise Http404
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97
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98 for topic in user.subscriptions.filter(id__in=delete_ids):
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99 user.subscriptions.remove(topic)
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100
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101 return HttpResponseRedirect(reverse("forums-manage_subscriptions"))
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bgneal@383
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102
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103 page_num = request.GET.get('page', 1)
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bgneal@232
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104 topics = user.subscriptions.select_related().order_by('-update_date')
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105 paginator = DiggPaginator(topics, 20, body=5, tail=2, margin=3, padding=2)
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bgneal@232
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106 try:
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107 page_num = int(page_num)
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108 except ValueError:
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109 page_num = 1
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110 try:
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111 page = paginator.page(page_num)
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112 except InvalidPage:
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113 raise Http404
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114
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115 return render(request, 'forums/manage_topics.html', {
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116 'page_title': 'Topic Subscriptions',
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117 'description': 'The forum topics you are currently subscribed to are listed below.',
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118 'page': page,
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119 })
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