discourse/lib/post_destroyer.rb

182 lines
5.4 KiB
Ruby

#
# How a post is deleted is affected by who is performing the action.
# this class contains the logic to delete it.
#
class PostDestroyer
def self.destroy_stubs
# exclude deleted topics and posts that are actively flagged
Post.where(deleted_at: nil, user_deleted: true)
.where("NOT EXISTS (
SELECT 1 FROM topics t
WHERE t.deleted_at IS NOT NULL AND
t.id = posts.topic_id
)")
.where("updated_at < ? AND post_number > 1", SiteSetting.delete_removed_posts_after.hours.ago)
.where("NOT EXISTS (
SELECT 1
FROM post_actions pa
WHERE pa.post_id = posts.id AND
pa.deleted_at IS NULL AND
pa.post_action_type_id IN (?)
)", PostActionType.notify_flag_type_ids)
.each do |post|
PostDestroyer.new(Discourse.system_user, post).destroy
end
end
def initialize(user, post)
@user = user
@post = post
end
def destroy
if @user.staff?
staff_destroyed
elsif @user.id == @post.user_id
user_destroyed
end
end
def recover
if @user.staff? && @post.deleted_at
staff_recovered
elsif @user.staff? || @user.id == @post.user_id
user_recovered
end
@post.topic.recover! if @post.post_number == 1
@post.topic.update_statistics
end
def staff_recovered
@post.recover!
publish("recovered")
end
# When a post is properly deleted. Well, it's still soft deleted, but it will no longer
# show up in the topic
def staff_destroyed
Post.transaction do
@post.trash!(@user)
if @post.topic
make_previous_post_the_last_one
clear_user_posted_flag
feature_users_in_the_topic
Topic.reset_highest(@post.topic_id)
end
trash_public_post_actions
agree_with_flags
trash_user_actions
@post.update_flagged_posts_count
remove_associated_replies
remove_associated_notifications
@post.topic.trash!(@user) if @post.topic && @post.post_number == 1
update_associated_category_latest_topic
end
publish("deleted")
end
def publish(message)
# edge case, topic is already destroyed
return unless @post.topic
MessageBus.publish("/topic/#{@post.topic_id}",{
id: @post.id,
post_number: @post.post_number,
updated_at: @post.updated_at,
type: message
},
group_ids: @post.topic.secure_group_ids
)
end
# When a user 'deletes' their own post. We just change the text.
def user_destroyed
Post.transaction do
@post.revise(@user, I18n.t('js.post.deleted_by_author', count: SiteSetting.delete_removed_posts_after), force_new_version: true)
@post.update_column(:user_deleted, true)
@post.update_flagged_posts_count
@post.topic_links.each(&:destroy)
end
end
def user_recovered
Post.transaction do
@post.update_column(:user_deleted, false)
@post.skip_unique_check = true
@post.revise(@user, @post.revisions.last.modifications["raw"][0], force_new_version: true)
@post.update_flagged_posts_count
end
end
private
def make_previous_post_the_last_one
last_post = Post.where("topic_id = ? and id <> ?", @post.topic_id, @post.id).order('created_at desc').limit(1).first
if last_post.present?
@post.topic.update_attributes(
last_posted_at: last_post.created_at,
last_post_user_id: last_post.user_id,
highest_post_number: last_post.post_number
)
end
end
def clear_user_posted_flag
unless Post.exists?(["topic_id = ? and user_id = ? and id <> ?", @post.topic_id, @post.user_id, @post.id])
TopicUser.where(topic_id: @post.topic_id, user_id: @post.user_id).update_all 'posted = false'
end
end
def feature_users_in_the_topic
Jobs.enqueue(:feature_topic_users, topic_id: @post.topic_id, except_post_id: @post.id)
end
def trash_public_post_actions
public_post_actions = PostAction.publics.where(post_id: @post.id)
public_post_actions.each { |pa| pa.trash!(@user) }
f = PostActionType.public_types.map { |k,v| ["#{k}_count", 0] }
Post.with_deleted.where(id: @post.id).update_all(Hash[*f.flatten])
end
def agree_with_flags
PostAction.agree_flags!(@post, @user, delete_post: true)
end
def trash_user_actions
UserAction.where(target_post_id: @post.id).each do |ua|
row = {
action_type: ua.action_type,
user_id: ua.user_id,
acting_user_id: ua.acting_user_id,
target_topic_id: ua.target_topic_id,
target_post_id: ua.target_post_id
}
UserAction.remove_action!(row)
end
end
def remove_associated_replies
post_ids = PostReply.where(reply_id: @post.id).pluck(:post_id)
if post_ids.present?
PostReply.delete_all reply_id: @post.id
Post.where(id: post_ids).each { |p| p.update_column :reply_count, p.replies.count }
end
end
def remove_associated_notifications
Notification.delete_all topic_id: @post.topic_id, post_number: @post.post_number
end
def update_associated_category_latest_topic
return unless @post.topic && @post.topic.category
return unless @post.id == @post.topic.category.latest_post_id || (@post.post_number == 1 && @post.topic_id == @post.topic.category.latest_topic_id)
@post.topic.category.update_latest
end
end