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annotate gpp/forums/tools.py @ 333:0bf5a5677067

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Import from future with_statement for Python 2.5 in import_old_links and podcasts scripts.
author Brian Neal <bgneal@gmail.com>
date Fri, 25 Feb 2011 22:03:08 +0000
parents 767cedc7d12a
children d1b11096595b
rev   line source
bgneal@147 1 """
bgneal@147 2 This module contains misc. utility functions for forum management.
bgneal@147 3 """
bgneal@228 4 import logging
bgneal@228 5
bgneal@147 6 from forums.models import Post, Topic, Forum, ForumLastVisit, TopicLastVisit
bgneal@147 7
bgneal@147 8
bgneal@147 9 def delete_user_posts(user):
bgneal@147 10 """
bgneal@147 11 This function deletes all the posts for a given user.
bgneal@147 12 It also cleans up any last visit database records for the user.
bgneal@147 13 This function adjusts the last post foreign keys before deleting
bgneal@147 14 the posts to avoid the cascading delete behavior.
bgneal@147 15 """
bgneal@147 16 posts = Post.objects.filter(user=user).select_related()
bgneal@147 17
bgneal@285 18 # delete attachments
bgneal@285 19 for post in posts:
bgneal@285 20 post.attachments.clear()
bgneal@285 21
bgneal@147 22 # build a set of topics and forums affected by the post deletions
bgneal@147 23
bgneal@147 24 topics = set(post.topic for post in posts)
bgneal@147 25 forums = set(topic.forum for topic in topics)
bgneal@147 26
bgneal@147 27 post_ids = [post.pk for post in posts]
bgneal@147 28 pending_delete = []
bgneal@147 29
bgneal@147 30 for topic in topics:
bgneal@147 31 if topic.last_post.pk in post_ids:
bgneal@147 32 topic_posts = Post.objects.filter(topic=topic).exclude(
bgneal@147 33 pk__in=post_ids)
bgneal@147 34 topic.post_count = topic_posts.count()
bgneal@147 35 if topic.post_count > 0:
bgneal@147 36 topic.last_post = topic_posts.latest()
bgneal@147 37 topic.update_date = topic.last_post.creation_date
bgneal@147 38 topic.save()
bgneal@147 39 else:
bgneal@147 40 # Topic should be deleted, it has no posts;
bgneal@147 41 # We can't delete it now as it could cascade and take out a
bgneal@147 42 # forum. Remember it for later deletion.
bgneal@147 43 pending_delete.append(topic)
bgneal@147 44
bgneal@147 45 for forum in forums:
bgneal@147 46 if forum.last_post.pk in post_ids:
bgneal@147 47 forum_posts = Post.objects.filter(topic__forum=forum).exclude(
bgneal@147 48 pk__in=post_ids)
bgneal@147 49 forum.post_count = forum_posts.count()
bgneal@147 50 if forum.post_count > 0:
bgneal@147 51 forum.last_post = forum_posts.latest()
bgneal@147 52 else:
bgneal@147 53 forum.last_post = None
bgneal@147 54 forum.save()
bgneal@147 55
bgneal@147 56 # Delete pending topics now because forums have just adjusted their
bgneal@147 57 # foreign keys into Post
bgneal@147 58 if pending_delete:
bgneal@147 59 topic_ids = [topic.pk for topic in pending_delete]
bgneal@147 60 Topic.objects.filter(pk__in=topic_ids).delete()
bgneal@147 61
bgneal@147 62 # Topics have been deleted, re-compute topic counts for forums
bgneal@147 63 for forum in forums:
bgneal@147 64 forum.topic_count = Topic.objects.filter(forum=forum).count()
bgneal@147 65 forum.save()
bgneal@147 66
bgneal@147 67 # All foreign keys are accounted for, we can now delete the posts in bulk.
bgneal@147 68 # Since some posts in our original queryset may have been deleted already,
bgneal@147 69 # run a new query (although it may be ok)
bgneal@147 70 Post.objects.filter(pk__in=post_ids).delete()
bgneal@147 71
bgneal@147 72 # delete all the last visit records for this user
bgneal@147 73 TopicLastVisit.objects.filter(user=user).delete()
bgneal@147 74 ForumLastVisit.objects.filter(user=user).delete()
bgneal@147 75
bgneal@228 76
bgneal@228 77 def create_topic(forum_slug, user, topic_name, post_body, ip='', sticky=False,
bgneal@228 78 locked=False):
bgneal@228 79 """Programmatically create a topic & first post in a given forum.
bgneal@228 80
bgneal@228 81 This function creates a new topic in the forum that has the slug
bgneal@228 82 specified by the 'forum_slug' argument. Other arguments are as follows:
bgneal@228 83 'user' - create the topic and post with this user as the owner
bgneal@228 84 'topic_name' - topic name (title)
bgneal@228 85 'post_body' - topic post body (as markup, not HTML)
bgneal@228 86 'ip' - IP address for the post (as a string)
bgneal@228 87 'sticky' - if True, the post will be stickied
bgneal@228 88 'locked' - if True, the post will be locked
bgneal@228 89
bgneal@228 90 """
bgneal@228 91 try:
bgneal@228 92 forum = Forum.objects.get(slug=forum_slug)
bgneal@228 93 except Forum.DoesNotExist:
bgneal@316 94 logging.error('could not create_topic for forum_slug=%s', forum_slug)
bgneal@228 95 raise
bgneal@228 96
bgneal@228 97 topic = Topic(forum=forum,
bgneal@228 98 name=topic_name,
bgneal@228 99 user=user,
bgneal@228 100 sticky=sticky,
bgneal@228 101 locked=locked)
bgneal@228 102 topic.save()
bgneal@228 103
bgneal@228 104 post = Post(topic=topic,
bgneal@228 105 user=user,
bgneal@228 106 body=post_body,
bgneal@228 107 user_ip=ip)
bgneal@228 108 post.save()