discourse/app/models/concerns/reports/topics.rb

# frozen_string_literal: true

module Reports::Topics
  extend ActiveSupport::Concern

  class_methods do
    def report_topics(report)
      category_id, include_subcategories = report.add_category_filter

      basic_report_about report,
                         Topic,
                         :listable_count_per_day,
                         report.start_date,
                         report.end_date,
                         category_id,
                         include_subcategories

      countable = Topic.listable_topics
      countable =
        countable.where(
          category_id: include_subcategories ? Category.subcategory_ids(category_id) : category_id,
        ) if category_id

      add_counts report, countable, "topics.created_at"
    end
  end
end