Eric Marguin
19 years ago
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be387cec01
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<?php // $Id: tracking.lib.php 2007-28-02 15:51:53
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/* |
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============================================================================== |
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Dokeos - elearning and course management software |
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Copyright (c) 2004 Dokeos S.A. |
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Copyright (c) 2003 Ghent University (UGent) |
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Copyright (c) 2001 Universite catholique de Louvain (UCL) |
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Copyright (c) various contributors |
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For a full list of contributors, see "credits.txt". |
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The full license can be read in "license.txt". |
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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See the GNU General Public License for more details. |
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Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com |
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============================================================================== |
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*/ |
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/** |
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============================================================================== |
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* This is the tracking library for Dokeos. |
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* Include/require it in your code to use its functionality. |
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* |
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* @package dokeos.library |
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============================================================================== |
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*/ |
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class Tracking { |
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/** |
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* Calculates the time spent on the platform by a user |
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* @param integer $user_id the user id |
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* @return timestamp $nb_seconds |
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*/ |
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function get_time_spent_on_the_platform ($user_id) |
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{ |
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$tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN); |
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$sql = 'SELECT login_date, logout_date FROM '.$tbl_track_login.' |
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WHERE login_user_id = '.intval($user_id); |
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$rs = api_sql_query($sql); |
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$nb_seconds=0; |
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while($a_connections=mysql_fetch_array($rs)) |
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{ |
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$s_login_date = $a_connections["login_date"]; |
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$s_logout_date = $a_connections["logout_date"]; |
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$i_timestamp_login_date = strtotime($s_login_date); |
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$i_timestamp_logout_date = strtotime($s_logout_date); |
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$nb_seconds += ($i_timestamp_logout_date-$i_timestamp_login_date); |
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} |
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return $nb_seconds; |
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} |
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/** |
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* Calculates the time spent on the course |
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* @param integer $user_id the user id |
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* @param string $course_code the course code |
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* @return timestamp $nb_seconds |
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*/ |
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function get_time_spent_on_the_course ($user_id, $course_code) |
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{ |
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// protect datas |
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$student_id = intval($student_id); |
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$course_code = addslashes($course_code); |
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$tbl_track_course = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS); |
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$sql = 'SELECT login_course_date, logout_course_date FROM '.$tbl_track_course.' |
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WHERE user_id = '.intval($user_id).' |
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AND course_code="'.$course_code.'"'; |
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$rs = api_sql_query($sql); |
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$nb_seconds=0; |
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while($a_connections=mysql_fetch_array($rs)) |
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{ |
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$s_login_date = $a_connections["login_course_date"]; |
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$s_logout_date = $a_connections["logout_course_date"]; |
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$i_timestamp_login_date = strtotime($s_login_date); |
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$i_timestamp_logout_date = strtotime($s_logout_date); |
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$nb_seconds += ($i_timestamp_logout_date-$i_timestamp_login_date); |
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} |
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return $nb_seconds; |
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} |
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function get_last_connection_date($student_id) |
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{ |
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$tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN); |
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$sql = 'SELECT login_date FROM '.$tbl_track_login.' |
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WHERE login_user_id = '.intval($student_id).' |
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ORDER BY login_date DESC LIMIT 0,1'; |
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$rs = api_sql_query($sql); |
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if($last_login_date = mysql_result($rs,0,0)) |
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{ |
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return $last_login_date; |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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function count_course_per_student ($user_id) |
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{ |
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$user_id = intval($user_id); |
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$tbl_course_rel_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER); |
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$tbl_session_course_rel_user = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE_USER); |
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$sql = 'SELECT DISTINCT course_code |
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FROM '.$tbl_course_rel_user.' |
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WHERE user_id = '.$user_id; |
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$rs = api_sql_query($sql , __FILE__ , __LINE__); |
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$nb_courses = mysql_num_rows($rs); |
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$sql = 'SELECT DISTINCT course_code |
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FROM '.$tbl_session_course_rel_user.' |
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WHERE id_user = '.$user_id; |
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$rs = api_sql_query($sql , __FILE__ , __LINE__); |
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$nb_courses += mysql_num_rows($rs); |
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return $nb_courses; |
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} |
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function get_avg_student_progress($student_id, $course_code) |
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{ |
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require_once(api_get_path(LIBRARY_PATH).'course.lib.php'); |
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// protect datas |
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$student_id = intval($student_id); |
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$course_code = addslashes($course_code); |
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// get the informations of the course |
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$a_course = CourseManager :: get_course_information($course_code); |
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// table definition |
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$tbl_course_lp_view = Database :: get_course_table(TABLE_LP_VIEW , $a_course['db_name']); |
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$tbl_course_lp_view_item = Database :: get_course_table(TABLE_LP_ITEM_VIEW , $a_course['db_name']); |
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$tbl_course_lp_item = Database :: get_course_table(TABLE_LP_ITEM , $a_course['db_name']); |
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$tbl_course_lp = Database :: get_course_table(TABLE_LP , $a_course['db_name']); |
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// get the progress in learning pathes |
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$sqlProgress = "SELECT COUNT( DISTINCT item_view.lp_item_id ) AS nbItem |
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FROM ".$tbl_course_lp_view_item." AS item_view |
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INNER JOIN ".$tbl_course_lp_view." AS lpview |
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ON lpview.user_id = ".$student_id." |
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WHERE item_view.status = 'completed' |
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"; |
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$resultProgress = api_sql_query($sqlProgress); |
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$a_nbItem = mysql_fetch_array($resultProgress); |
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$nbTotalItem = Database::count_rows($tbl_course_lp_item); |
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$totalItem = $totalItem + $nbTotalItem; |
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$totalProgress = $totalProgress + $a_nbItem['nbItem']; |
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$progress = round(($a_nbItem['nbItem'] * 100) / $nbTotalItem); |
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return $progress; |
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} |
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function get_avg_student_score($student_id, $course_code) |
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{ |
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// protect datas |
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$student_id = intval($student_id); |
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$course_code = addslashes($course_code); |
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$sqlScore = " SELECT exe_result, |
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exe_weighting |
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FROM ".Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_EXERCICES)." |
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WHERE exe_user_id = ".$student_id." |
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AND exe_cours_id = '".$course_code."' |
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"; |
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$resultScore = api_sql_query($sqlScore); |
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$i = 0; |
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$score = 0; |
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while($a_score = mysql_fetch_array($resultScore)) |
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{ |
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$score = $score + $a_score['exe_result']; |
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$weighting = $weighting + $a_score['exe_weighting']; |
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$i++; |
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} |
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$totalScore = $totalScore + $score; |
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$totalWeighting = $totalWeighting + $weighting; |
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$pourcentageScore = round(($score*100)/$weighting); |
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return $pourcentageScore; |
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} |
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/** |
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* gets the list of students followed by coach |
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* @param integer $coach_id the id of the coach |
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* @return Array the list of students |
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*/ |
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function get_student_followed_by_coach ($coach_id) |
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{ |
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$coach_id = intval($coach_id); |
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$tbl_session_course_user = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE_USER); |
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$tbl_session_course = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE); |
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$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION); |
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$a_students = array(); |
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////////////////////////////////////////////////////////////// |
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// At first, courses where $coach_id is coach of the course // |
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////////////////////////////////////////////////////////////// |
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$sql = 'SELECT id_session, course_code FROM '.$tbl_session_course.' WHERE id_coach='.$coach_id; |
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$result=api_sql_query($sql); |
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while($a_courses=mysql_fetch_array($result)) |
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{ |
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$course_code=$a_courses["course_code"]; |
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$id_session=$a_courses["id_session"]; |
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$sql = "SELECT distinct srcru.id_user |
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FROM $tbl_session_course_user AS srcru |
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WHERE course_code='$course_code' AND id_session='$id_session'"; |
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$rs=api_sql_query($sql); |
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while($row=mysql_fetch_array($rs)) |
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{ |
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$a_students[$row['id_user']]=$row['id_user']; |
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} |
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} |
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////////////////////////////////////////////////////////////// |
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// Then, courses where $coach_id is coach of the session // |
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////////////////////////////////////////////////////////////// |
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$sql = 'SELECT session_course_user.id_user |
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FROM '.$tbl_session_course_user.' as session_course_user |
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INNER JOIN '.$tbl_session_course.' as session_course |
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ON session_course.course_code = session_course_user.course_code |
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INNER JOIN '.$tbl_session.' as session |
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ON session.id = session_course.id_session |
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AND session.id_coach = '.$coach_id; |
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$result=api_sql_query($sql); |
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while($row=mysql_fetch_array($result)) |
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{ |
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$a_students[$row['id_user']]=$row['id_user']; |
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} |
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return $a_students; |
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} |
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function get_courses_followed_by_coach ($coach_id) { |
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$coach_id = intval($coach_id); |
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$tbl_session_course_user = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE_USER); |
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$tbl_session_course = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE); |
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$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION); |
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////////////////////////////////////////////////////////////// |
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// At first, courses where $coach_id is coach of the course // |
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////////////////////////////////////////////////////////////// |
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$sql = 'SELECT DISTINCT course_code FROM '.$tbl_session_course.' WHERE id_coach='.$coach_id; |
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$result=api_sql_query($sql); |
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while($row = mysql_fetch_array($result)) |
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{ |
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$a_courses[$row['course_code']] = $row['course_code']; |
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} |
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////////////////////////////////////////////////////////////// |
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// Then, courses where $coach_id is coach of the session // |
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////////////////////////////////////////////////////////////// |
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$sql = 'SELECT DISTINCT session_course.course_code |
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FROM '.$tbl_session_course.' as session_course |
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INNER JOIN '.$tbl_session.' as session |
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ON session.id = session_course.id_session |
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AND session.id_coach = '.$coach_id; |
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$result=api_sql_query($sql); |
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while($row=mysql_fetch_array($result)) |
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{ |
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$a_courses[$row['course_code']] = $row['course_code']; |
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} |
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return $a_courses; |
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} |
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function get_sessions_coached_by_user($coach_id) |
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{ |
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// table definition |
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$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION); |
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$tbl_session_course = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE); |
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// protect datas |
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$coach_id = intval($coach_id); |
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// session where we are general coach |
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$sql = 'SELECT DISTINCT id, name, date_start, date_end |
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FROM '.$tbl_session.' |
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WHERE id_coach='.$coach_id; |
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$rs = api_sql_query($sql); |
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while($row = mysql_fetch_array($rs)) |
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{ |
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$a_sessions[$row["id"]]=$row; |
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} |
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// session where we are coach of a course |
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$sql = 'SELECT DISTINCT session.id, session.name, session.date_start, session.date_end |
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FROM '.$tbl_session.' as session |
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INNER JOIN '.$tbl_session_course.' as session_course |
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ON session.id = session_course.id_session |
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AND session_course.id_coach='.$coach_id; |
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$rs = api_sql_query($sql); |
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while($row = mysql_fetch_array($rs)) |
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{ |
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$a_sessions[$row["id"]]=$row; |
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} |
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return $a_sessions; |
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} |
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function get_courses_list_from_session($session_id) |
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{ |
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//protect datas |
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$session_id = intval($session_id); |
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// table definition |
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$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION); |
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$tbl_session_course = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE); |
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$sql = 'SELECT DISTINCT course_code, id_coach |
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FROM '.$tbl_session_course.' |
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WHERE id_session='.$session_id; |
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$rs = api_sql_query($sql,__FILE__,__LINE__); |
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$a_courses = array(); |
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while($row = mysql_fetch_array($rs)) |
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{ |
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$a_courses[$row['course_code']] = $row; |
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} |
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return $a_courses; |
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} |
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function count_student_assignments ($student_id, $course_code) |
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{ |
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require_once(api_get_path(LIBRARY_PATH).'course.lib.php'); |
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// protect datas |
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$student_id = intval($student_id); |
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$course_code = addslashes($course_code); |
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// get the informations of the course |
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$a_course = CourseManager :: get_course_information($course_code); |
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// table definition |
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$tbl_item_property = Database :: get_course_table(TABLE_ITEM_PROPERTY, $a_course['db_name']); |
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$sql = 'SELECT 1 |
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FROM '.$tbl_item_property.' |
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WHERE insert_user_id='.$student_id.' |
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AND tool="work"'; |
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$rs = api_sql_query($sql, __LINE__, __FILE__); |
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return mysql_num_rows($rs); |
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} |
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function count_student_messages ($student_id, $course_code) |
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{ |
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require_once(api_get_path(LIBRARY_PATH).'course.lib.php'); |
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// protect datas |
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$student_id = intval($student_id); |
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$course_code = addslashes($course_code); |
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// get the informations of the course |
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$a_course = CourseManager :: get_course_information($course_code); |
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// table definition |
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$tbl_messages = Database :: get_course_table(TABLE_FORUM_POST, $a_course['db_name']); |
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$sql = 'SELECT 1 |
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FROM '.$tbl_messages.' |
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WHERE poster_id='.$student_id; |
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$rs = api_sql_query($sql, __LINE__, __FILE__); |
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return mysql_num_rows($rs); |
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} |
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} |
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?> |
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