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322 lines
15 KiB
322 lines
15 KiB
17 years ago
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<?php
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004-2009 Dokeos SPRL
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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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Copyright (c) Bart Mollet, Hogeschool Gent
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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, rue du Corbeau, 108, B-1030 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 library provides functions for user management.
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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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require_once('display.lib.php');
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class SessionManager{
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/** Create a session
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,
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* @param array name, year_start,month_start, day_start,year_end,month_end,day_end,nb_days_acess_before,nb_days_acess_after
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**/
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function AddSession($name,$year_start,$month_start,$day_start,$year_end,$month_end,$day_end,$nb_days_acess_before,$nb_days_acess_after,$nolimit,$coach_username) {
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$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
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$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
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global $_user;
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$sql = 'SELECT user_id FROM '.$tbl_user.' WHERE username="'.Database::escape_string($coach_username).'"';
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$rs = api_sql_query($sql, __FILE__, __LINE__);
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$id_coach = Database::result($rs,0,'user_id');
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if (empty($nolimit)){
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$date_start="$year_start-".(($month_start < 10)?"0$month_start":$month_start)."-".(($day_start < 10)?"0$day_start":$day_start);
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$date_end="$year_end-".(($month_end < 10)?"0$month_end":$month_end)."-".(($day_end < 10)?"0$day_end":$day_end);
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} else {
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$date_start="000-00-00";
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$date_end="000-00-00";
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}
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if(empty($name)) {
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Display::display_normal_message(get_lang('SessionNameIsRequired'));
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} elseif (empty($coach_username)) {
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Display::display_normal_message(get_lang('CoachIsRequired'));
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} elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
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Display::display_normal_message(get_lang('InvalidStartDate'));
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} elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
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Display::display_normal_message(get_lang('InvalidEndDate'));
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} elseif(empty($nolimit) && $date_start >= $date_end) {
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Display::display_normal_message(get_lang('StartDateShouldBeBeforeEndDate'));
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} else {
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$rs = api_sql_query("SELECT 1 FROM $tbl_session WHERE name='".addslashes($name)."'");
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if(Database::num_rows($rs)) {
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Display::display_normal_message(get_lang('SessionNameSoonExists'));
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} else {
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api_sql_query("INSERT INTO $tbl_session(name,date_start,date_end,id_coach,session_admin_id, nb_days_access_before_beginning, nb_days_access_after_end) VALUES('".addslashes($name)."','$date_start','$date_end','$id_coach',".intval($_user['user_id']).",".$nb_days_acess_before.", ".$nb_days_acess_after.")",__FILE__,__LINE__);
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$id_session=Database::get_last_insert_id();
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return $id_session;
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}
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}
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}
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/** Edit a session
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,
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* @param array name, year_start,month_start, day_start,year_end,month_end,day_end,nb_days_acess_before,nb_days_acess_after,id
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* The parameter id is a primary key
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**/
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function EditSession($name,$year_start,$month_start,$day_start,$year_end,$month_end,$day_end,$nb_days_acess_before,$nb_days_acess_after,$nolimit,$id_coach,$id) {
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$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
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$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
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$tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
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global $_user;
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if (empty($nolimit)) {
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$date_start="$year_start-".(($month_start < 10)?"0$month_start":$month_start)."-".(($day_start < 10)?"0$day_start":$day_start);
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$date_end="$year_end-".(($month_end < 10)?"0$month_end":$month_end)."-".(($day_end < 10)?"0$day_end":$day_end);
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} else {
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$date_start="000-00-00";
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$date_end="000-00-00";
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}
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if(empty($name)){
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Display::display_normal_message(get_lang('SessionNameIsRequired'));
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} elseif(!empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
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Display::display_normal_message(get_lang('InvalidStartDate'));
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} elseif(!empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
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Display::display_normal_message(get_lang('InvalidEndDate'));
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} elseif(!empty($nolimit) && $date_start >= $date_end) {
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Display::display_normal_message(get_lang('StartDateShouldBeBeforeEndDate'));
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} else {
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$rs = api_sql_query("SELECT id FROM $tbl_session WHERE name='".addslashes($name)."'");
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$exists = false;
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while($row = mysql_fetch_array($rs)) {
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if($row['id']!=$id)
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$exists = true;
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}
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if ($exists) {
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Display::display_normal_message(get_lang('SessionNameSoonExists'));
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} else {
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$sql="UPDATE $tbl_session " .
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"SET name='".addslashes($name)."',
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date_start='".$date_start."',
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date_end='".$date_end."',
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id_coach='".$id_coach."',
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nb_days_access_before_beginning = ".$nb_days_acess_before.",
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nb_days_access_after_end = ".$nb_days_acess_after."
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WHERE id='$id'";
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api_sql_query($sql,__FILE__,__LINE__);
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$sqlu = "UPDATE $tbl_session_rel_course " .
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" SET id_coach='$id_coach'" .
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" WHERE id_session='$id'";
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api_sql_query($sqlu,__FILE__,__LINE__);
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return $id;
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}
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}
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}
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/** Delete session
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,
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* @param array idChecked
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* The parameters is a array to delete sessions
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**/
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function DeleteSession($idChecked) {
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$tbl_session=Database::get_main_table(TABLE_MAIN_SESSION);
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$tbl_session_rel_course=Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
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$tbl_session_rel_course_rel_user=Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
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$tbl_session_rel_user=Database::get_main_table(TABLE_MAIN_SESSION_USER);
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$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
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global $_user;
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if(is_array($idChecked)) {
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$idChecked=Database::escape_string(implode(',',$idChecked));
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} else {
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$idChecked=intval($idChecked);
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}
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if (!api_is_platform_admin()) {
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$sql = 'SELECT session_admin_id FROM '.Database :: get_main_table(TABLE_MAIN_SESSION).' WHERE id='.$idChecked;
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$rs = api_sql_query($sql,__FILE__,__LINE__);
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if (Database::result($rs,0,0)!=$_user['user_id']) {
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api_not_allowed(true);
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}
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}
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api_sql_query("DELETE FROM $tbl_session WHERE id IN($idChecked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_course WHERE id_session IN($idChecked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session IN($idChecked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_user WHERE id_session IN($idChecked)",__FILE__,__LINE__);
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}
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/**Subscribes users to the given session and optionally (default) unsubscribes previous users
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,
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* @param int Session ID
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* @param array List of user IDs
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* @param bool Whether to unsubscribe existing users (true, default) or not (false)
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* @return void Nothing, or false on error
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*/
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function suscribe_users_to_session($id_session,$UserList,$empty_users=true){
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if ($id_session!= strval(intval($id_session))) return false;
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foreach($UserList as $intUser){
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if ($intUser!= strval(intval($intUser))) return false;
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}
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$tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
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$tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
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$tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);
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$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
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$sql = "SELECT id_user FROM $tbl_session_rel_user WHERE id_session='$id_session'";
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$result = api_sql_query($sql,__FILE__,__LINE__);
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$existingUsers = array();
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while($row = Database::fetch_array($result)){
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$existingUsers[] = $row['id_user'];
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}
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$sql = "SELECT course_code FROM $tbl_session_rel_course WHERE id_session='$id_session'";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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$CourseList=array();
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while($row=Database::fetch_array($result)) {
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$CourseList[]=$row['course_code'];
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}
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foreach ($CourseList as $enreg_course) {
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// for each course in the session
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$nbr_users=0;
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$enreg_course = Database::escape_string($enreg_course);
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// delete existing users
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if ($empty_users!==false) {
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foreach ($existingUsers as $existing_user) {
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if(!in_array($existing_user, $UserList)) {
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$sql = "DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course' AND id_user='$existing_user'";
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api_sql_query($sql,__FILE__,__LINE__);
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if(Database::affected_rows()) {
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$nbr_users--;
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}
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}
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}
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}
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// insert new users into session_rel_course_rel_user and ignore if they already exist
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foreach ($UserList as $enreg_user) {
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if(!in_array($enreg_user, $existingUsers)) {
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$enreg_user = Database::escape_string($enreg_user);
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$insert_sql = "INSERT IGNORE INTO $tbl_session_rel_course_rel_user(id_session,course_code,id_user) VALUES('$id_session','$enreg_course','$enreg_user')";
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api_sql_query($insert_sql,__FILE__,__LINE__);
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if(Database::affected_rows()) {
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$nbr_users++;
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}
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}
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}
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// count users in this session-course relation
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$sql = "SELECT COUNT(id_user) as nbUsers FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course'";
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$rs = api_sql_query($sql, __FILE__, __LINE__);
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list($nbr_users) = Database::fetch_array($rs);
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// update the session-course relation to add the users total
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$update_sql = "UPDATE $tbl_session_rel_course SET nbr_users=$nbr_users WHERE id_session='$id_session' AND course_code='$enreg_course'";
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api_sql_query($update_sql,__FILE__,__LINE__);
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}
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// delete users from the session
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if ($empty_users!==false){
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api_sql_query("DELETE FROM $tbl_session_rel_user WHERE id_session = $id_session",__FILE__,__LINE__);
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}
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// insert missing users into session
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$nbr_users = 0;
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foreach ($UserList as $enreg_user) {
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$enreg_user = Database::escape_string($enreg_user);
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$nbr_users++;
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$insert_sql = "INSERT IGNORE INTO $tbl_session_rel_user(id_session, id_user) VALUES('$id_session','$enreg_user')";
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api_sql_query($insert_sql,__FILE__,__LINE__);
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}
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// update number of users in the session
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$nbr_users = count($UserList);
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$update_sql = "UPDATE $tbl_session SET nbr_users= $nbr_users WHERE id='$id_session' ";
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api_sql_query($update_sql,__FILE__,__LINE__);
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}
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/**Subscribes courses to the given session and optionally (default) unsubscribes previous users
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,
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* @param int Session ID
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* @param array List of courses IDs
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* @param bool Whether to unsubscribe existing users (true, default) or not (false)
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* @return void Nothing, or false on error
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*/
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function add_courses_to_session($id_session, $CourseList, $empty_courses=true){
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if ($id_session!= strval(intval($id_session))) return false;
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foreach($CourseList as $intCourse){
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if ($intCourse!= strval(intval($intCourse))) return false;
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}
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$tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
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$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
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$tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);
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$tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
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$tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
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$id_coach = api_sql_query("SELECT id_coach FROM $tbl_session WHERE id=$id_session");
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$id_coach = Database::fetch_array($id_coach);
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$id_coach = $id_coach[0];
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$rs = api_sql_query("SELECT course_code FROM $tbl_session_rel_course WHERE id_session=$id_session");
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$existingCourses = api_store_result($rs);
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$sql="SELECT id_user
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FROM $tbl_session_rel_user
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WHERE id_session = $id_session";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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$UserList=api_store_result($result);
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foreach($CourseList as $enreg_course) {
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$enreg_course = Database::escape_string($enreg_course);
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$exists = false;
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foreach($existingCourses as $existingCourse) {
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if($enreg_course == $existingCourse['course_code']) {
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$exists=true;
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}
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}
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if(!$exists) {
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$sql_insert_rel_course= "INSERT INTO $tbl_session_rel_course(id_session,course_code, id_coach) VALUES('$id_session','$enreg_course','$id_coach')";
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api_sql_query($sql_insert_rel_course ,__FILE__,__LINE__);
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//We add in the existing courses table the current course, to not try to add another time the current course
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$existingCourses[]=array('course_code'=>$enreg_course);
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||
|
|
$nbr_users=0;
|
||
|
|
foreach ($UserList as $enreg_user) {
|
||
|
|
$enreg_user = Database::escape_string($enreg_user['id_user']);
|
||
|
|
$sql_insert = "INSERT IGNORE INTO $tbl_session_rel_course_rel_user(id_session,course_code,id_user) VALUES('$id_session','$enreg_course','$enreg_user')";
|
||
|
|
api_sql_query($sql_insert,__FILE__,__LINE__);
|
||
|
|
if(Database::affected_rows()) {
|
||
|
|
$nbr_users++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
api_sql_query("UPDATE $tbl_session_rel_course SET nbr_users=$nbr_users WHERE id_session='$id_session' AND course_code='$enreg_course'",__FILE__,__LINE__);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
if ($empty_courses!==false) {
|
||
|
|
foreach($existingCourses as $existingCourse) {
|
||
|
|
if(!in_array($existingCourse['course_code'], $CourseList)){
|
||
|
|
api_sql_query("DELETE FROM $tbl_session_rel_course WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
|
||
|
|
api_sql_query("DELETE FROM $tbl_session_rel_course_rel_user WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$nbr_courses=count($CourseList);
|
||
|
|
api_sql_query("UPDATE $tbl_session SET nbr_courses=$nbr_courses WHERE id='$id_session'",__FILE__,__LINE__);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|