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251 lines
8.0 KiB
251 lines
8.0 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* Gradebook link to student publication item
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* @author Bert Steppé
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* @package chamilo.gradebook
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*/
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/**
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* Class
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* @package chamilo.gradebook
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*/
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class ForumThreadLink extends AbstractLink
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{
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// INTERNAL VARIABLES
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private $forum_thread_table = null;
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private $itemprop_table = null;
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// CONSTRUCTORS
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function __construct() {
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parent::__construct();
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$this->set_type(LINK_FORUM_THREAD);
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}
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public function get_type_name() {
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return get_lang('ForumThreads');
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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 exercises 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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$sql = 'SELECT thread_id,thread_title,thread_title_qualify from '.$this->get_forum_thread_table()
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.' forum_thread WHERE thread_id NOT IN'
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.' (SELECT ref_id FROM '.$tbl_grade_links
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.' WHERE type = '.LINK_FORUM_THREAD
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." AND course_code = '".Database::escape_string($this->get_course_code())."'"
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.') AND forum_thread.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['thread_title_qualify']) and $data['thread_title_qualify']!=""){
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$cats[] = array ($data['thread_id'], $data['thread_title_qualify']);
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} else {
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$cats[] = array ($data['thread_id'], $data['thread_title']);
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}
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}
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return $cats;
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}
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/**
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* Generate an array of all exercises available.
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* @return array 2-dimensional array - every element contains 2 subelements (id, name)
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*/
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public function get_all_links() {
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if (empty($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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$tbl_grade_links = Database :: get_course_table(TABLE_FORUM_THREAD);
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$tbl_item_property = Database :: get_course_table(TABLE_ITEM_PROPERTY);
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$sql = 'SELECT tl.thread_id, tl.thread_title, tl.thread_title_qualify
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FROM '.$tbl_grade_links.' tl ,'.$tbl_item_property.' ip
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WHERE tl.c_id = '.$this->course_id.' AND
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ip.c_id = '.$this->course_id.' AND
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tl.thread_id = ip.ref AND
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ip.tool = "forum_thread" AND
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ip.visibility<>2 AND tl.session_id='.api_get_session_id().' GROUP BY ip.ref ';
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$result = Database::query($sql);
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while ($data=Database::fetch_array($result)) {
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if ( isset($data['thread_title_qualify']) and $data['thread_title_qualify']!=""){
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$cats[] = array ($data['thread_id'], $data['thread_title_qualify']);
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} else {
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$cats[] = array ($data['thread_id'], $data['thread_title']);
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}
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}
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$my_cats=isset($cats)?$cats:null;
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return $my_cats;
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}
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/**
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* Has anyone done this exercise yet ?
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*/
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public function has_results() {
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$tbl_grade_links = Database :: get_course_table(TABLE_FORUM_POST);
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$sql = 'SELECT count(*) AS number FROM '.$tbl_grade_links."
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WHERE c_id = ".$this->course_id." AND thread_id = '".$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 ($number[0] != 0);
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}
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public function calc_score($stud_id = null) {
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if (!empty($database_name)) {
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$thread_qualify = Database :: get_course_table(TABLE_FORUM_THREAD_QUALIFY);
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$sql = 'SELECT thread_qualify_max FROM '.Database :: get_course_table(TABLE_FORUM_THREAD)."
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WHERE c_id = ".$this->course_id." AND thread_id = '".$this->get_ref_id()."'";
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$query = Database::query($sql);
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$assignment = Database::fetch_array($query);
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$sql = "SELECT * FROM $thread_qualify WHERE c_id = ".$this->course_id." AND thread_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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// order by id, that way the student's first attempt is accessed first
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$sql .= ' ORDER BY qualify_time DESC';
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$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)) {
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return array ($data['qualify'], $assignment['thread_qualify_max']);
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} else {
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//We sent the 0/thread_qualify_max instead of null for correct calculations
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//return null;
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return array (0, $assignment['thread_qualify_max']);
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}
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} else {
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// all students -> get average
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$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 ($assignment['thread_qualify_max'] != 0) {
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$students[$data['user_id']] = $data['qualify'];
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$rescount++;
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$sum += ($data['qualify'] / $assignment['thread_qualify_max']);
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}
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}
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}
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if ($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_forum_thread_table () {
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return $this->forum_thread_table = Database :: get_course_table(TABLE_FORUM_THREAD);
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}
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/**
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* Lazy load function to get the database table of the item properties
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*/
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private function get_itemprop_table () {
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$this->itemprop_table = Database :: get_course_table(TABLE_ITEM_PROPERTY);
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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_exercise_data();
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$thread_title=isset($this->exercise_data['thread_title']) ? $this->exercise_data['thread_title'] : '';
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$thread_title_qualify=isset($this->exercise_data['thread_title_qualify']) ? $this->exercise_data['thread_title_qualify'] : '';
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if ( isset($thread_title_qualify) && $thread_title_qualify!="") {
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return $this->exercise_data['thread_title_qualify'];
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} else {
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return $thread_title;
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}
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}
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public function get_description() {
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return '';//$this->exercise_data['description'];
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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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$sql = 'SELECT count(id) from '.$this->get_forum_thread_table().'
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WHERE c_id = '.$this->course_id.' AND thread_id = '.$this->get_ref_id().' AND session_id='.api_get_session_id().'';
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$result = Database::query($sql);
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$number = Database::fetch_row($result);
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return ($number[0] != 0);
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}
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public function get_test_id() {
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return 'DEBUG:ID';
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}
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public function get_link() {
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//it was extracts the forum id
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$sql = 'SELECT * FROM '.$this->get_forum_thread_table()."
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WHERE c_id = '.$this->course_id.' AND thread_id = '".$this->get_ref_id()."' AND session_id = ".api_get_session_id()."";
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$result = Database::query($sql);
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$row = Database::fetch_array($result,'ASSOC');
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$forum_id=$row['forum_id'];
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$url = api_get_path(WEB_PATH).'main/forum/viewthread.php?cidReq='.$this->get_course_code().'&thread='.$this->get_ref_id().'&gradebook=view&forum='.$forum_id;
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return $url;
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}
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private function get_exercise_data() {
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if (!isset($this->exercise_data)) {
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$sql = 'SELECT * FROM '.$this->get_forum_thread_table()."
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WHERE c_id = '.$this->course_id.' AND thread_id = '".$this->get_ref_id()."' AND session_id=".api_get_session_id()."";
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$query = Database::query($sql);
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$this->exercise_data = Database::fetch_array($query);
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}
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return $this->exercise_data;
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}
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public function get_icon_name() {
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return 'forum';
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}
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}
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