discourse/lib/topic_publisher.rb

# frozen_string_literal: true

class TopicPublisher
  def initialize(topic, published_by, category_id)
    @topic = topic
    @published_by = published_by
    @category_id = category_id
  end

  def publish!
    published_at = Time.zone.now

    TopicTimestampChanger
      .new(timestamp: published_at, topic: @topic)
      .change! do
        if @topic.private_message?
          @topic = TopicConverter.new(@topic, @published_by).convert_to_public_topic(@category_id)
        else
          PostRevisor.new(@topic.first_post, @topic).revise!(
            @published_by,
            category_id: @category_id,
          )
        end

        @topic.update_columns(visible: true)

        StaffActionLogger.new(@published_by).log_topic_published(@topic)

        # Clean up any publishing artifacts
        SharedDraft.where(topic: @topic).delete_all

        TopicTimer.where(topic: @topic).update_all(
          deleted_at: DateTime.now,
          deleted_by_id: @published_by.id,
        )

        op = @topic.first_post

        if op.present?
          op.revisions.destroy_all

          op.update_columns(version: 1, public_version: 1, last_version_at: published_at)
        end
      end

    Jobs.enqueue(
      :notify_tag_change,
      post_id: @topic.first_post.id,
      notified_user_ids: [@topic.first_post.user_id, @published_by.id].uniq,
      diff_tags: @topic.tags.map(&:name),
      force: true,
    )

    MessageBus.publish("/topic/#{@topic.id}", reload_topic: true, refresh_stream: true)

    @topic
  end
end