forum/subscriptions.py

   1 import os\r
   2 import re\r
   3 import datetime\r
   4 from forum.models import User, Question, Comment, QuestionSubscription, SubscriptionSettings, Answer\r
   5 from forum.models.user import activity_record\r
   6 from forum.models.node import node_create\r
   7 from forum.utils.mail import send_email\r
   8 from forum.views.readers import question_view\r
   9 from django.utils.translation import ugettext as _\r
  10 from django.conf import settings\r
  11 from django.db.models import Q, F\r
  12 from django.db.models.signals import post_save\r
  13 from django.contrib.contenttypes.models import ContentType\r
  14 import const\r
  15 \r
  16 def create_subscription_if_not_exists(question, user):\r
  17     try:\r
  18         subscription = QuestionSubscription.objects.get(question=question, user=user)\r
  19     except:\r
  20         subscription = QuestionSubscription(question=question, user=user)\r
  21         subscription.save()\r
  22 \r
  23 def apply_default_filters(queryset, excluded_id):\r
  24     return queryset.values('email', 'username').exclude(id=excluded_id)\r
  25 \r
  26 def create_recipients_dict(usr_list):\r
  27     return [(s['username'], s['email'], {'username': s['username']}) for s in usr_list]\r
  28 \r
  29 def question_posted(instance, **kwargs):\r
  30     question = instance\r
  31 \r
  32     subscribers = User.objects.values('email', 'username').filter(\r
  33             Q(subscription_settings__enable_notifications=True, subscription_settings__new_question='i') |\r
  34             (Q(subscription_settings__new_question_watched_tags='i') &\r
  35               Q(marked_tags__name__in=question.tagnames.split(' ')) &\r
  36               Q(tag_selections__reason='good'))\r
  37     ).exclude(id=question.author.id).distinct()\r
  38 \r
  39     recipients = create_recipients_dict(subscribers)\r
  40 \r
  41     send_email(settings.EMAIL_SUBJECT_PREFIX + _("New question on %(app_name)s") % dict(app_name=settings.APP_SHORT_NAME),\r
  42                recipients, "notifications/newquestion.html", {\r
  43         'question': question,\r
  44     })\r
  45 \r
  46     if question.author.subscription_settings.questions_asked:\r
  47         subscription = QuestionSubscription(question=question, user=question.author)\r
  48         subscription.save()\r
  49 \r
  50     new_subscribers = User.objects.filter(\r
  51             Q(subscription_settings__all_questions=True) |\r
  52             Q(subscription_settings__all_questions_watched_tags=True,\r
  53                     marked_tags__name__in=question.tagnames.split(' '),\r
  54                     tag_selections__reason='good'))\r
  55 \r
  56     for user in new_subscribers:\r
  57         create_subscription_if_not_exists(question, user)\r
  58 \r
  59 node_create.connect(question_posted, sender=Question)\r
  60 \r
  61 \r
  62 def answer_posted(instance, **kwargs):\r
  63     answer = instance\r
  64     question = answer.question\r
  65 \r
  66     subscribers = question.subscribers.values('email', 'username').filter(\r
  67             subscription_settings__enable_notifications=True,\r
  68             subscription_settings__notify_answers=True,\r
  69             subscription_settings__subscribed_questions='i'\r
  70     ).exclude(id=answer.author.id).distinct()\r
  71     recipients = create_recipients_dict(subscribers)\r
  72 \r
  73     send_email(settings.EMAIL_SUBJECT_PREFIX + _("New answer to '%(question_title)s'") % dict(question_title=question.title),\r
  74                recipients, "notifications/newanswer.html", {\r
  75         'question': question,\r
  76         'answer': answer\r
  77     })\r
  78 \r
  79     if answer.author.subscription_settings.questions_answered:\r
  80         create_subscription_if_not_exists(question, answer.author)\r
  81 \r
  82 node_create.connect(answer_posted, sender=Answer)\r
  83 \r
  84 \r
  85 def comment_posted(instance, **kwargs):\r
  86     comment = instance\r
  87     post = comment.content_object\r
  88 \r
  89     if post.__class__ == Question:\r
  90         question = post\r
  91     else:\r
  92         question = post.question\r
  93 \r
  94     subscribers = question.subscribers.values('email', 'username')\r
  95 \r
  96     q_filter = Q(subscription_settings__notify_comments=True) | Q(subscription_settings__notify_comments_own_post=True, id=post.author.id)\r
  97 \r
  98     inreply = re.search('@\w+', comment.comment)\r
  99     if inreply is not None:\r
 100         q_filter = q_filter | Q(subscription_settings__notify_reply_to_comments=True,\r
 101                                 username__istartswith=inreply.group(0)[1:],\r
 102                                 comments__object_id=post.id,\r
 103                                 comments__content_type=ContentType.objects.get_for_model(post.__class__)\r
 104                                 )\r
 105 \r
 106     subscribers = subscribers.filter(\r
 107             q_filter, subscription_settings__subscribed_questions='i', subscription_settings__enable_notifications=True\r
 108     ).exclude(id=comment.user.id).distinct()\r
 109 \r
 110     recipients = create_recipients_dict(subscribers)\r
 111 \r
 112     send_email(settings.EMAIL_SUBJECT_PREFIX + _("New comment on %(question_title)s") % dict(question_title=question.title),\r
 113                recipients, "notifications/newcomment.html", {\r
 114                 'comment': comment,\r
 115                 'post': post,\r
 116                 'question': question,\r
 117     })\r
 118 \r
 119     if comment.user.subscription_settings.questions_commented:\r
 120         create_subscription_if_not_exists(question, comment.user)\r
 121 \r
 122 node_create.connect(comment_posted, sender=Comment)\r
 123 \r
 124 \r
 125 def answer_accepted(instance, created, **kwargs):\r
 126     if not created and 'accepted' in instance.get_dirty_fields() and instance.accepted:\r
 127         question = instance.question\r
 128 \r
 129         subscribers = question.subscribers.values('email', 'username').filter(\r
 130                 subscription_settings__enable_notifications=True,\r
 131                 subscription_settings__notify_accepted=True,\r
 132                 subscription_settings__subscribed_questions='i'\r
 133         ).exclude(id=instance.accepted_by.id).distinct()\r
 134         recipients = create_recipients_dict(subscribers)\r
 135 \r
 136         send_email(settings.EMAIL_SUBJECT_PREFIX + _("An answer to '%(question_title)s' was accepted") % dict(question_title=question.title),\r
 137                    recipients, "notifications/answeraccepted.html", {\r
 138             'question': question,\r
 139             'answer': instance\r
 140         })\r
 141 \r
 142 post_save.connect(answer_accepted, sender=Answer)\r
 143 \r
 144 \r
 145 def member_joined(sender, instance, created, **kwargs):\r
 146     if not created:\r
 147         return\r
 148         \r
 149     subscribers = User.objects.values('email', 'username').filter(\r
 150             subscription_settings__enable_notifications=True,\r
 151             subscription_settings__member_joins='i'\r
 152     ).exclude(id=instance.id).distinct()\r
 153 \r
 154     recipients = create_recipients_dict(subscribers)\r
 155 \r
 156     send_email(settings.EMAIL_SUBJECT_PREFIX + _("%(username)s is a new member on %(app_name)s") % dict(username=instance.username, app_name=settings.APP_SHORT_NAME),\r
 157                recipients, "notifications/newmember.html", {\r
 158         'newmember': instance,\r
 159     })\r
 160 \r
 161     sub_settings = SubscriptionSettings(user=instance)\r
 162     sub_settings.save()\r
 163 \r
 164 post_save.connect(member_joined, sender=User, weak=False)\r
 165 \r
 166 def question_viewed(instance, user, **kwargs):\r
 167     if not user.is_authenticated():\r
 168         return\r
 169         \r
 170     try:\r
 171         subscription = QuestionSubscription.objects.get(question=instance, user=user)\r
 172         subscription.last_view = datetime.datetime.now()\r
 173         subscription.save()\r
 174     except:\r
 175         if user.subscription_settings.questions_viewed:\r
 176             subscription = QuestionSubscription(question=instance, user=user)\r
 177             subscription.save()\r
 178 \r
 179 question_view.connect(question_viewed)\r
 180 \r
 181 #todo: this stuff goes temporarily here\r
 182 from forum.models import Award, Answer\r
 183 \r
 184 def notify_award_message(instance, created, **kwargs):\r
 185     if created:\r
 186         user = instance.user\r
 187 \r
 188         msg = (u"Congratulations, you have received a badge '%s'. " \\r
 189                 + u"Check out <a href=\"%s\">your profile</a>.") \\r
 190                 % (instance.badge.name, user.get_profile_url())\r
 191 \r
 192         user.message_set.create(message=msg)\r
 193 \r
 194 post_save.connect(notify_award_message, sender=Award)\r
 195 \r
 196 #todo: translate this\r
 197 record_answer_event_re = re.compile("You have received (a|\d+) .*new response.*")\r
 198 def record_answer_event(instance, created, **kwargs):\r
 199     if created:\r
 200         q_author = instance.question.author\r
 201         found_match = False\r
 202         #print 'going through %d messages' % q_author.message_set.all().count()\r
 203         for m in q_author.message_set.all():\r
 204             #print m.message\r
 205             match = record_answer_event_re.search(m.message)\r
 206             if match:\r
 207                 found_match = True\r
 208                 try:\r
 209                     cnt = int(match.group(1))\r
 210                 except:\r
 211                     cnt = 1\r
 212                 m.message = u"You have received %d <a href=\"%s?sort=responses\">new responses</a>."\\r
 213                             % (cnt+1, q_author.get_profile_url())\r
 214 \r
 215                 m.save()\r
 216                 break\r
 217         if not found_match:\r
 218             msg = u"You have received a <a href=\"%s?sort=responses\">new response</a>."\\r
 219                     % q_author.get_profile_url()\r
 220 \r
 221             q_author.message_set.create(message=msg)\r
 222 \r
 223 post_save.connect(record_answer_event, sender=Answer)