/**
  * It's used to print attendance sheet
  * @param string action
  * @param int    attendance id
  */
 public function attendance_sheet_export_to_pdf($action, $attendance_id, $student_id = 0, $course_id = '')
 {
     $attendance = new Attendance();
     $courseInfo = CourseManager::get_course_information($course_id);
     $attendance->set_course_id($courseInfo['code']);
     $data_array = array();
     $data_array['attendance_id'] = $attendance_id;
     $data_array['users_in_course'] = $attendance->get_users_rel_course($attendance_id);
     $filter_type = 'today';
     if (!empty($_REQUEST['filter'])) {
         $filter_type = $_REQUEST['filter'];
     }
     $my_calendar_id = null;
     if (is_numeric($filter_type)) {
         $my_calendar_id = $filter_type;
         $filter_type = 'calendar_id';
     }
     $data_array['attendant_calendar'] = $attendance->get_attendance_calendar($attendance_id, $filter_type, $my_calendar_id);
     if (api_is_allowed_to_edit(null, true) || api_is_drh()) {
         $data_array['users_presence'] = $attendance->get_users_attendance_sheet($attendance_id);
     } else {
         if (!empty($student_id)) {
             $user_id = intval($student_id);
         } else {
             $user_id = api_get_user_id();
         }
         $data_array['users_presence'] = $attendance->get_users_attendance_sheet($attendance_id, $user_id);
         $data_array['faults'] = $attendance->get_faults_of_user($user_id, $attendance_id);
         $data_array['user_id'] = $user_id;
     }
     $data_array['next_attendance_calendar_id'] = $attendance->get_next_attendance_calendar_id($attendance_id);
     //Set headers pdf
     $courseCategory = CourseManager::get_course_category($courseInfo['category_code']);
     $teacherInfo = CourseManager::get_teacher_list_from_course_code($courseInfo['real_id']);
     $teacherName = null;
     foreach ($teacherInfo as $dados) {
         if ($teacherName != null) {
             $teacherName = $teacherName . " / ";
         }
         $teacherName .= $dados['firstname'] . " " . $dados['lastname'];
     }
     // Get data table - Marco - ordenacao fixa - just fullname
     $data_table = array();
     $head_table = array('#', get_lang('Name'));
     foreach ($data_array['attendant_calendar'] as $class_day) {
         //$head_table[] = api_format_date($class_day['date_time'], DATE_FORMAT_SHORT).' <br />'.api_format_date($class_day['date_time'], TIME_NO_SEC_FORMAT);
         $head_table[] = api_format_date($class_day['date_time'], DATE_FORMAT_NUMBER_NO_YEAR);
     }
     $data_table[] = $head_table;
     $dataClass = array();
     $max_dates_per_page = 10;
     $data_attendant_calendar = $data_array['attendant_calendar'];
     $data_users_presence = $data_array['users_presence'];
     $count = 1;
     if (!empty($data_array['users_in_course'])) {
         foreach ($data_array['users_in_course'] as $user) {
             $cols = 1;
             $result = array();
             $result['count'] = $count;
             $result['full_name'] = api_get_person_name($user['firstname'], $user['lastname']);
             foreach ($data_array['attendant_calendar'] as $class_day) {
                 if ($class_day['done_attendance'] == 1) {
                     if ($data_users_presence[$user['user_id']][$class_day['id']]['presence'] == 1) {
                         $result[$class_day['id']] = get_lang('UserAttendedSymbol');
                     } else {
                         $result[$class_day['id']] = get_lang('UserNotAttendedSymbol');
                     }
                 } else {
                     $result[$class_day['id']] = " ";
                 }
                 $cols++;
             }
             $count++;
             $data_table[] = $result;
         }
     }
     $max_cols_per_page = 12;
     //10 dates + 2 name and number
     $max_dates_per_page = $max_dates_per_page_original = $max_cols_per_page - 2;
     //10
     $rows = count($data_table);
     if ($cols > $max_cols_per_page) {
         $number_tables = round(($cols - 2) / $max_dates_per_page);
         $headers = $data_table[0];
         $all = array();
         $tables = array();
         $changed = 1;
         for ($i = 0; $i <= $rows; $i++) {
             $row = $data_table[$i];
             $key = 1;
             $max_dates_per_page = 10;
             $item = $data_table[$i];
             $count_j = 0;
             if (!empty($item)) {
                 foreach ($item as $value) {
                     if ($count_j >= $max_dates_per_page) {
                         $key++;
                         $max_dates_per_page = $max_dates_per_page_original * $key;
                         //magic hack
                         $tables[$key][$i][] = $tables[1][$i][0];
                         $tables[$key][$i][] = $tables[1][$i][1];
                     }
                     $tables[$key][$i][] = $value;
                     $count_j++;
                 }
             }
         }
         $content = null;
         if (!empty($tables)) {
             foreach ($tables as $sub_table) {
                 $content .= Export::convert_array_to_html($sub_table) . '<br /><br />';
             }
         }
     } else {
         $content .= Export::convert_array_to_html($data_table, array('header_attributes' => array('align' => 'center')));
     }
     $params = array('filename' => get_lang('Attendance') . '-' . api_get_local_time(), 'pdf_title' => $courseInfo['title'], 'course_code' => $courseInfo['code'], 'add_signatures' => true, 'orientation' => 'landscape', 'pdf_teachers' => $teacherName, 'pdf_course_category' => $courseCategory['name'], 'format' => 'A4-L', 'orientation' => 'L');
     Export::export_html_to_pdf($content, $params);
     exit;
 }