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250 lines
8.4 KiB
250 lines
8.4 KiB
<?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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* @author Christian Fasanando (christian1827@gmail.com)
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* @package chamilo.gradebook
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*/
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class AttendanceLink extends AbstractLink
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{
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// INTERNAL VARIABLES
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private $attendance_table = null;
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private $itemprop_table = null;
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// CONSTRUCTORS
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function AttendanceLink() {
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$this->set_type(LINK_ATTENDANCE);
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}
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public function get_type_name() {
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return get_lang('Attendance');
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}
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public function is_allowed_to_change_name() {
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return false;
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}
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// FUNCTIONS IMPLEMENTING ABSTRACTLINK
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/**
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* Generate an array of attendances that a teacher hasn't created a link for.
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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_not_created_links() {
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if (empty($this->course_code)) {
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die('Error in get_not_created_links() : course code not set');
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}
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$tbl_grade_links = Database :: get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
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$sql = 'SELECT att.id, att.name, att.attendance_qualify_title
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FROM '.$this->get_attendance_table().' att
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WHERE att.id NOT IN (SELECT ref_id FROM '.$tbl_grade_links.' WHERE type = '.LINK_ATTENDANCE.' AND course_code = "'.Database::escape_string($this->get_course_code()).'")
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AND att.session_id='.api_get_session_id().'';
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$result = Database::query($sql);
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$cats=array();
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while ($data=Database::fetch_array($result)) {
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if ( isset($data['attendance_qualify_title']) && $data['attendance_qualify_title'] != ''){
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$cats[] = array ($data['id'], $data['attendance_qualify_title']);
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} else {
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$cats[] = array ($data['id'], $data['name']);
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}
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}
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return $cats;
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}
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/**
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* Generate an array of all attendances available.
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* @return array 2-dimensional array - every element contains 2 subelements (id, name)
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*/
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public function get_all_links() {
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if (empty($this->course_code)) {
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die('Error in get_not_created_links() : course code not set');
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}
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$tbl_attendance = $this->get_attendance_table();
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$session_id = api_get_session_id();
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$sql = 'SELECT att.id, att.name, att.attendance_qualify_title FROM '.$tbl_attendance.' att WHERE att.active = 1 AND att.session_id = '.intval($session_id).'';
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$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[] = array ($data['id'], $data['attendance_qualify_title']);
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} else {
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$cats[] = array ($data['id'], $data['name']);
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}
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}
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$my_cats = isset($cats)?$cats:null;
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return $my_cats;
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}
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/**
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* Has anyone done this exercise yet ?
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*/
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public function has_results() {
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$course_info = api_get_course_info($this->course_code);
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$tbl_attendance_result = Database :: get_course_table(TABLE_ATTENDANCE_RESULT,$course_info['dbName']);
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$sql = 'SELECT count(*) AS number FROM '.$tbl_attendance_result." WHERE attendance_id = '".intval($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 ($number[0] != 0);
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}
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public function calc_score($stud_id = null) {
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$course_info = Database :: get_course_info($this->get_course_code());
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$database_name = (empty($course_info['db_name']))?$course_info['dbName']:$course_info['db_name'];
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if ($database_name!="") {
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$tbl_attendance_result = Database::get_course_table(TABLE_ATTENDANCE_RESULT, $database_name);
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$session_id = api_get_session_id();
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// get attendance qualify max
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$sql = 'SELECT att.attendance_qualify_max FROM '.$this->get_attendance_table().' att WHERE att.id = '.intval($this->get_ref_id()).' AND att.session_id='.intval($session_id).'';
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$query = Database::query($sql);
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$attendance = Database::fetch_array($query);
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// get results
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$sql = 'SELECT * FROM '.$tbl_attendance_result.' WHERE attendance_id = '.intval($this->get_ref_id());
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if (isset($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($stud_id))
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{
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if ($data=Database::fetch_array($scores)) {
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return array ($data['score'], $attendance['attendance_qualify_max']);
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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 array (0, $attendance['attendance_qualify_max']);
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}
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} else {// all students -> get average
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$students=array(); // 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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while ($data=Database::fetch_array($scores)) {
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if (!(array_key_exists($data['user_id'],$students))) {
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if ($attendance['attendance_qualify_max'] != 0) {
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$students[$data['user_id']] = $data['score'];
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$rescount++;
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$sum += ($data['score'] / $attendance['attendance_qualify_max']);
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}
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}
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}
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if ($rescount == 0) {
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return null;
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} else {
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return array ($sum , $rescount);
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}
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}
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}
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}
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// INTERNAL FUNCTIONS
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/**
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* Lazy load function to get the database table of the student publications
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*/
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private function get_attendance_table() {
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$course_info = Database :: get_course_info($this->get_course_code());
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$database_name = isset($course_info['db_name']) ? $course_info['db_name'] : '';
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if ($database_name!='') {
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if (!isset($this->attendance_table)) {
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$this->attendance_table = Database :: get_course_table(TABLE_ATTENDANCE, $database_name);
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}
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return $this->attendance_table;
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} else {
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return '';
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}
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}
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/**
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* Lazy load function to get the database table of the item properties
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*/
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private function get_itemprop_table () {
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if (!isset($this->itemprop_table)) {
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$course_info = Database :: get_course_info($this->get_course_code());
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$database_name = $course_info['db_name'];
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$this->itemprop_table = Database :: get_course_table(TABLE_ITEM_PROPERTY, $database_name);
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}
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return $this->itemprop_table;
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}
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public function needs_name_and_description() {
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return false;
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}
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public function needs_max() {
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return false;
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}
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public function needs_results() {
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return false;
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}
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public function get_name() {
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$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 $attendance_title;
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}
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}
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public function get_description() {
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return '';
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}
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/**
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* Check if this still links to an exercise
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*/
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public function is_valid_link() {
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$session_id = api_get_session_id();
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$sql = 'SELECT count(att.id) FROM '.$this->get_attendance_table().' att
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WHERE att.id = '.intval($this->get_ref_id()).' AND att.session_id='.intval($session_id).'';
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$result = Database::query($sql);
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$number = Database::fetch_row($result);
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return ($number[0] != 0);
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}
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public function get_test_id() {
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return 'DEBUG:ID';
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}
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public function get_link() {
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//it was extracts the attendance id
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$tbl_name = $this->get_attendance_table();
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$session_id = api_get_session_id();
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if ($tbl_name != '') {
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$sql = 'SELECT * FROM '.$this->get_attendance_table().' att
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WHERE att.id = '.intval($this->get_ref_id()).' AND att.session_id = '.intval($session_id).' ';
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$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='.$attendance_id.'&cidReq='.$this->get_course_code();
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return $url;
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}
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}
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private function get_attendance_data() {
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$tbl_name = $this->get_attendance_table();
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$session_id = api_get_session_id();
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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 WHERE att.id = '.intval($this->get_ref_id()).' AND att.session_id='.intval($session_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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?>
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