discourse/app/jobs/scheduled/pending_queued_posts_reminder.rb

# frozen_string_literal: true

module Jobs
  class PendingQueuedPostsReminder < ::Jobs::Scheduled
    every 15.minutes

    def execute(args)
      return true unless SiteSetting.notify_about_queued_posts_after > 0

      queued_post_ids = should_notify_ids

      if queued_post_ids.size > 0 && last_notified_id.to_i < queued_post_ids.max
        PostCreator.create(
          Discourse.system_user,
          target_group_names: Group[:moderators].name,
          archetype: Archetype.private_message,
          subtype: TopicSubtype.system_message,
          title:
            I18n.t(
              "system_messages.queued_posts_reminder.subject_template",
              count: queued_post_ids.size,
            ),
          raw:
            I18n.t(
              "system_messages.queued_posts_reminder.text_body_template",
              base_url: Discourse.base_url,
            ),
        )

        self.last_notified_id = queued_post_ids.max
      end

      true
    end

    def should_notify_ids
      ReviewableQueuedPost
        .pending
        .where("created_at < ?", SiteSetting.notify_about_queued_posts_after.to_f.hours.ago)
        .pluck(:id)
    end

    def last_notified_id
      (i = Discourse.redis.get(self.class.last_notified_key)) && i.to_i
    end

    def last_notified_id=(arg)
      Discourse.redis.set(self.class.last_notified_key, arg)
    end

    def self.last_notified_key
      "last_notified_queued_post_id"
    end
  end
end