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main/gradebook/lib/be/attendancelink.class.php
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276
main/gradebook/lib/be/attendancelink.class.php
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<?php
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/* For licensing terms, see /license.txt */
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/**
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* Gradebook link to attendance item.
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*
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* @author Christian Fasanando (christian1827@gmail.com)
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*/
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class AttendanceLink extends AbstractLink
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{
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private $attendance_table = null;
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private $itemprop_table = null;
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/**
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* Constructor.
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*/
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public function __construct()
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{
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parent::__construct();
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$this->set_type(LINK_ATTENDANCE);
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}
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/**
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* @return string
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*/
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public function get_type_name()
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{
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return get_lang('Attendance');
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}
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/**
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* @return bool
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*/
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public function is_allowed_to_change_name()
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{
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return false;
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}
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/**
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* Generate an array of all attendances available.
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*
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* @return array 2-dimensional array - every element contains 2 subelements (id, name)
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*/
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public function get_all_links()
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{
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if (empty($this->course_code)) {
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return [];
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}
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$tbl_attendance = $this->get_attendance_table();
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$sessionId = $this->get_session_id();
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$sql = 'SELECT att.id, att.name, att.attendance_qualify_title
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FROM '.$tbl_attendance.' att
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WHERE
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att.c_id = '.$this->course_id.' AND
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att.active = 1 AND
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att.session_id = '.$sessionId;
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$result = Database::query($sql);
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while ($data = Database::fetch_array($result)) {
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if (isset($data['attendance_qualify_title']) && '' != $data['attendance_qualify_title']) {
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$cats[] = [$data['id'], $data['attendance_qualify_title']];
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} else {
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$cats[] = [$data['id'], $data['name']];
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}
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}
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$my_cats = isset($cats) ? $cats : [];
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return $my_cats;
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}
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/**
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* Has anyone done this exercise yet ?
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*/
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public function has_results()
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{
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$tbl_attendance_result = Database::get_course_table(TABLE_ATTENDANCE_RESULT);
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$sessionId = $this->get_session_id();
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$sql = 'SELECT count(*) AS number FROM '.$tbl_attendance_result."
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WHERE
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session_id = $sessionId AND
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c_id = '.$this->course_id.' AND
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attendance_id = '".$this->get_ref_id()."'";
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$result = Database::query($sql);
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$number = Database::fetch_row($result);
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return 0 != $number[0];
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}
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/**
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* @param int $stud_id
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*
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* @return array|null
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*/
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public function calc_score($stud_id = null, $type = null)
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{
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$tbl_attendance_result = Database::get_course_table(TABLE_ATTENDANCE_RESULT);
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$sessionId = $this->get_session_id();
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// get attendance qualify max
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$sql = 'SELECT att.attendance_qualify_max
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FROM '.$this->get_attendance_table().' att
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WHERE
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att.c_id = '.$this->course_id.' AND
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att.id = '.$this->get_ref_id().' AND
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att.session_id = '.$sessionId;
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$query = Database::query($sql);
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$attendance = Database::fetch_array($query, 'ASSOC');
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// Get results
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$sql = 'SELECT *
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FROM '.$tbl_attendance_result.'
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WHERE c_id = '.$this->course_id.' AND attendance_id = '.$this->get_ref_id();
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if (isset($stud_id)) {
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$sql .= ' AND user_id = '.intval($stud_id);
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}
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$scores = Database::query($sql);
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// for 1 student
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if (isset($stud_id)) {
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if ($data = Database::fetch_array($scores, 'ASSOC')) {
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return [
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$data['score'],
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$attendance['attendance_qualify_max'],
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];
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} else {
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//We sent the 0/attendance_qualify_max instead of null for correct calculations
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return [0, $attendance['attendance_qualify_max']];
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}
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} else {
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// all students -> get average
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$students = []; // user list, needed to make sure we only
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// take first attempts into account
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$rescount = 0;
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$sum = 0;
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$sumResult = 0;
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$bestResult = 0;
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while ($data = Database::fetch_array($scores)) {
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if (!(array_key_exists($data['user_id'], $students))) {
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if (0 != $attendance['attendance_qualify_max']) {
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$students[$data['user_id']] = $data['score'];
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$rescount++;
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$sum += $data['score'] / $attendance['attendance_qualify_max'];
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$sumResult += $data['score'];
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if ($data['score'] > $bestResult) {
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$bestResult = $data['score'];
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}
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$weight = $attendance['attendance_qualify_max'];
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}
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}
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}
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if (0 == $rescount) {
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return [null, null];
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} else {
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switch ($type) {
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case 'best':
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return [$bestResult, $weight];
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break;
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case 'average':
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return [$sumResult / $rescount, $weight];
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break;
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case 'ranking':
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return AbstractLink::getCurrentUserRanking($stud_id, $students);
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break;
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default:
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return [$sum, $rescount];
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break;
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}
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}
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}
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}
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public function needs_name_and_description()
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{
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return false;
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}
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public function needs_max()
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{
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return false;
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}
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public function needs_results()
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{
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return false;
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}
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/**
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* @return string
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*/
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public function get_name()
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{
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$this->get_attendance_data();
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$attendance_title = isset($this->attendance_data['name']) ? $this->attendance_data['name'] : '';
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$attendance_qualify_title = isset($this->attendance_data['attendance_qualify_title']) ? $this->attendance_data['attendance_qualify_title'] : '';
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if (isset($attendance_qualify_title) && '' != $attendance_qualify_title) {
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return $this->attendance_data['attendance_qualify_title'];
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} else {
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return $attendance_title;
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}
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}
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/**
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* @return string
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*/
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public function get_description()
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{
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return '';
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}
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/**
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* Check if this still links to an exercise.
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*/
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public function is_valid_link()
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{
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$sql = 'SELECT count(att.id) FROM '.$this->get_attendance_table().' att
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WHERE att.c_id = '.$this->course_id.' AND att.id = '.$this->get_ref_id();
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$result = Database::query($sql);
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$number = Database::fetch_row($result);
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return 0 != $number[0];
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}
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public function get_link()
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{
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// it was extracts the attendance id
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$sessionId = $this->get_session_id();
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$sql = 'SELECT * FROM '.$this->get_attendance_table().' att
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WHERE att.c_id = '.$this->course_id.' AND att.id = '.$this->get_ref_id();
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$result = Database::query($sql);
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$row = Database::fetch_array($result, 'ASSOC');
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$attendance_id = $row['id'];
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$url = api_get_path(WEB_PATH).'main/attendance/index.php?action=attendance_sheet_list&gradebook=view&attendance_id='.$attendance_id.'&'.api_get_cidreq_params($this->get_course_code(), $sessionId);
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return $url;
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}
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/**
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* @return string
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*/
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public function get_icon_name()
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{
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return 'attendance';
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}
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/**
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* Lazy load function to get the database table of the student publications.
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*/
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private function get_attendance_table()
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{
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$this->attendance_table = Database::get_course_table(TABLE_ATTENDANCE);
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return $this->attendance_table;
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}
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/**
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* @return array|bool
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*/
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private function get_attendance_data()
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{
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$tbl_name = $this->get_attendance_table();
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if ('' == $tbl_name) {
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return false;
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} elseif (!isset($this->attendance_data)) {
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$sql = 'SELECT * FROM '.$this->get_attendance_table().' att
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WHERE att.c_id = '.$this->course_id.' AND att.id = '.$this->get_ref_id();
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$query = Database::query($sql);
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$this->attendance_data = Database::fetch_array($query);
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}
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return $this->attendance_data;
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}
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}
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