class PostMover attr_reader :original_topic, :destination_topic, :user, :post_ids def self.move_types @move_types ||= Enum.new(:new_topic, :existing_topic) end def initialize(original_topic, user, post_ids) @original_topic = original_topic @user = user @post_ids = post_ids end def to_topic(id) @move_type = PostMover.move_types[:existing_topic] Topic.transaction do move_posts_to Topic.find_by_id(id) end end def to_new_topic(title, category_id=nil) @move_type = PostMover.move_types[:new_topic] post = Post.find_by(id: post_ids.first) raise Discourse::InvalidParameters unless post Topic.transaction do move_posts_to Topic.create!( user: post.user, title: title, category_id: category_id, created_at: post.created_at ) end end private def move_posts_to(topic) Guardian.new(user).ensure_can_see! topic @destination_topic = topic moving_all_posts = (@original_topic.posts.pluck(:id).sort == @post_ids.sort) move_each_post notify_users_that_posts_have_moved update_statistics update_user_actions set_last_post_user_id(destination_topic) if moving_all_posts @original_topic.update_status('closed', true, @user) end destination_topic.reload destination_topic end def move_each_post max_post_number = destination_topic.max_post_number + 1 @move_map = {} @reply_count = {} posts.each_with_index do |post, offset| unless post.is_first_post? @move_map[post.post_number] = offset + max_post_number else @move_map[post.post_number] = 1 end if post.reply_to_post_number.present? @reply_count[post.reply_to_post_number] = (@reply_count[post.reply_to_post_number] || 0) + 1 end end posts.each do |post| post.is_first_post? ? create_first_post(post) : move(post) end PostReply.where("reply_id IN (:post_ids) OR post_id IN (:post_ids)", post_ids: post_ids).each do |post_reply| if post_reply.post && post_reply.reply && post_reply.reply.topic_id != post_reply.post.topic_id PostReply.delete_all(reply_id: post_reply.reply.id, post_id: post_reply.post.id) end end end def create_first_post(post) new_post = PostCreator.create( post.user, raw: post.raw, topic_id: destination_topic.id, acting_user: user, skip_validations: true ) PostAction.copy(post, new_post) new_post.update_column(:reply_count, @reply_count[1] || 0) end def move(post) @first_post_number_moved ||= post.post_number Post.where(id: post.id, topic_id: original_topic.id).update_all( [ ['post_number = :post_number', 'reply_to_post_number = :reply_to_post_number', 'topic_id = :topic_id', 'sort_order = :post_number', 'reply_count = :reply_count', ].join(', '), reply_count: @reply_count[post.post_number] || 0, post_number: @move_map[post.post_number], reply_to_post_number: @move_map[post.reply_to_post_number], topic_id: destination_topic.id ] ) # Move any links from the post to the new topic post.topic_links.update_all(topic_id: destination_topic.id) end def update_statistics destination_topic.update_statistics original_topic.update_statistics TopicUser.update_post_action_cache(topic_id: original_topic.id, post_action_type: :bookmark) TopicUser.update_post_action_cache(topic_id: destination_topic.id, post_action_type: :bookmark) end def update_user_actions UserAction.synchronize_target_topic_ids(posts.map(&:id)) end def notify_users_that_posts_have_moved enqueue_notification_job create_moderator_post_in_original_topic end def enqueue_notification_job Jobs.enqueue( :notify_moved_posts, post_ids: post_ids, moved_by_id: user.id ) end def create_moderator_post_in_original_topic move_type_str = PostMover.move_types[@move_type].to_s original_topic.add_moderator_post( user, I18n.t("move_posts.#{move_type_str}_moderator_post", count: post_ids.count, topic_link: "[#{destination_topic.title}](#{destination_topic.relative_url})"), post_type: Post.types[:small_action], action_code: "split_topic", post_number: @first_post_number_moved ) end def posts @posts ||= begin Post.where(topic: @original_topic, id: post_ids).order(:created_at).tap do |posts| raise Discourse::InvalidParameters.new(:post_ids) if posts.empty? end end end def set_last_post_user_id(topic) user_id = topic.posts.last.user_id rescue nil return if user_id.nil? topic.update_attribute :last_post_user_id, user_id end end