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] Topic.transaction do move_posts_to Topic.create!( user: user, title: title, category_id: category_id ) end end private def move_posts_to(topic) Guardian.new(user).ensure_can_see! topic @destination_topic = topic move_each_post notify_users_that_posts_have_moved update_statistics update_user_actions destination_topic end def move_each_post with_max_post_number do |max_post_number| posts.each_with_index do |post, offset| post.is_first_post? ? copy(post) : move(post, offset + max_post_number) end end end def copy(post) PostCreator.create( post.user, raw: post.raw, topic_id: destination_topic.id, acting_user: user ) end def move(post, post_number) @first_post_number_moved ||= post.post_number Post.where(id: post.id, topic_id: original_topic.id).update_all( [ ['post_number = :post_number', 'topic_id = :topic_id', 'sort_order = :post_number' ].join(', '), post_number: 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 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 original_topic.add_moderator_post( user, I18n.t("move_posts.#{PostMover.move_types[@move_type].to_s}_moderator_post", count: post_ids.count, topic_link: "[#{destination_topic.title}](#{destination_topic.url})"), post_number: @first_post_number_moved ) end def with_max_post_number yield destination_topic.max_post_number + 1 end def posts @posts ||= begin Post.where(id: post_ids).order(:created_at).tap do |posts| raise Discourse::InvalidParameters.new(:post_ids) if posts.empty? end end end end