discourse/app/models/reports/profile_views.rb

Report.add_report('profile_views') do |report|
  group_filter = report.filters.dig(:group)
  report.add_filter('group', default: group_filter)

  start_date = report.start_date
  end_date = report.end_date
  basic_report_about report, UserProfileView, :profile_views_by_day, start_date, end_date, group_filter

  report.total = UserProfile.sum(:views)
  report.prev30Days = UserProfileView.where('viewed_at >= ? AND viewed_at < ?', start_date - 30.days, start_date + 1).count
end