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593 lines
24 KiB
593 lines
24 KiB
<?php //$id: $
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/* For licensing terms, see /dokeos_license.txt */
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/**
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==============================================================================
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* This class provides methods for sessions management.
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* Include/require it in your code to use its features.
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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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private function __construct() {
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}
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/**
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* Fetches a session from the database
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* @param int Session ID
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* @return array Session details (id, id_coach, name, nbr_courses, nbr_users, nbr_classes, date_start, date_end, nb_days_access_before_beginning,nb_days_access_after_end, session_admin_id)
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*/
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public static function fetch($id) {
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$t = Database::get_main_table(TABLE_MAIN_SESSION);
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if ($id != strval(intval($id))) { return array(); }
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$s = "SELECT * FROM $t WHERE id = $id";
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$r = Database::query($s,__FILE__,__LINE__);
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if (Database::num_rows($r) != 1) { return array(); }
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return Database::fetch_array($r,'ASSOC');
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}
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/**
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* Create a session
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
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* @param string name
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* @param integer year_start
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* @param integer month_start
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* @param integer day_start
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* @param integer year_end
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* @param integer month_end
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* @param integer day_end
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* @param integer nb_days_acess_before
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* @param integer nb_days_acess_after
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* @param integer nolimit
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* @param string coach_username
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* @return $id_session;
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**/
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public static function create_session ($sname,$syear_start,$smonth_start,$sday_start,$syear_end,$smonth_end,$sday_end,$snb_days_acess_before,$snb_days_acess_after,$nolimit,$coach_username) {
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global $_user;
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$name= trim($sname);
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$year_start= intval($syear_start);
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$month_start=intval($smonth_start);
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$day_start=intval($sday_start);
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$year_end=intval($syear_end);
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$month_end=intval($smonth_end);
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$day_end=intval($sday_end);
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$nb_days_acess_before = intval($snb_days_acess_before);
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$nb_days_acess_after = intval($snb_days_acess_after);
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$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
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$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
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$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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$msg=get_lang('SessionNameIsRequired');
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return $msg;
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} elseif (empty($coach_username)) {
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$msg=get_lang('CoachIsRequired');
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return $msg;
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} elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
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$msg=get_lang('InvalidStartDate');
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return $msg;
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} elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
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$msg=get_lang('InvalidEndDate');
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return $msg;
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} elseif(empty($nolimit) && $date_start >= $date_end) {
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$msg=get_lang('StartDateShouldBeBeforeEndDate');
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return $msg;
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} else {
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$rs = api_sql_query("SELECT 1 FROM $tbl_session WHERE name='".addslashes($name)."'");
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if(Database::num_rows($rs)) {
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$msg=get_lang('SessionNameAlreadyExists');
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return $msg;
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} else {
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api_sql_query("INSERT INTO $tbl_session(name,date_start,date_end,id_coach,session_admin_id, nb_days_access_before_beginning, nb_days_access_after_end) VALUES('".Database::escape_string($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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$id_session=Database::get_last_insert_id();
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// add event to system log
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$time = time();
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$user_id = api_get_user_id();
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event_system(LOG_SESSION_CREATE, LOG_SESSION_ID, $id_session, $time, $user_id);
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return $id_session;
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}
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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>,from existing code
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* @param integer id
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* @param string name
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* @param integer year_start
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* @param integer month_start
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* @param integer day_start
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* @param integer year_end
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* @param integer month_end
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* @param integer day_end
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* @param integer nb_days_acess_before
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* @param integer nb_days_acess_after
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* @param integer nolimit
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* @param integer id_coach
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* @return $id;
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* The parameter id is a primary key
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**/
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public static function edit_session ($id,$name,$year_start,$month_start,$day_start,$year_end,$month_end,$day_end,$nb_days_acess_before,$nb_days_acess_after,$nolimit,$id_coach) {
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global $_user;
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$name=trim(stripslashes($name));
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$year_start=intval($year_start);
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$month_start=intval($month_start);
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$day_start=intval($day_start);
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$year_end=intval($year_end);
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$month_end=intval($month_end);
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$day_end=intval($day_end);
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$id_coach= intval($id_coach);
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$nb_days_acess_before= intval($nb_days_acess_before);
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$nb_days_acess_after = intval($nb_days_acess_after);
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$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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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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$msg=get_lang('SessionNameIsRequired');
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return $msg;
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} elseif (empty($id_coach)) {
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$msg=get_lang('CoachIsRequired');
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return $msg;
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} elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
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$msg=get_lang('InvalidStartDate');
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return $msg;
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} elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
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$msg=get_lang('InvalidEndDate');
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return $msg;
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} elseif (empty($nolimit) && $date_start >= $date_end) {
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$msg=get_lang('StartDateShouldBeBeforeEndDate');
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return $msg;
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} else {
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$rs = api_sql_query("SELECT id FROM $tbl_session WHERE name='".Database::escape_string($name)."'");
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$exists = false;
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while ($row = Database::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 ($exists) {
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$msg=get_lang('SessionNameAlreadyExists');
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return $msg;
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} else {
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$sql="UPDATE $tbl_session " .
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"SET name='".Database::escape_string($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 $id;
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}
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}
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}
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/**
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* Delete session
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* @author Carlos Vargas <carlos.vargas@dokeos.com>, from existing code
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* @param array id_checked
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* @return void Nothing, or false on error
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* The parameters is a array to delete sessions
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**/
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public static function delete_session ($id_checked) {
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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 $_user;
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if(is_array($id_checked)) {
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$id_checked=Database::escape_string(implode(',',$id_checked));
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} else {
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$id_checked=intval($id_checked);
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}
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if (!api_is_platform_admin()) {
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$sql = 'SELECT session_admin_id FROM '.Database :: get_main_table(TABLE_MAIN_SESSION).' WHERE id='.$id_checked;
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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 $tbl_session WHERE id IN($id_checked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_course WHERE id_session IN($id_checked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session IN($id_checked)",__FILE__,__LINE__);
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api_sql_query("DELETE FROM $tbl_session_rel_user WHERE id_session IN($id_checked)",__FILE__,__LINE__);
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// delete extra session fields
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$t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
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$t_sfv = Database::get_main_table(TABLE_MAIN_SESSION_FIELD_VALUES);
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$sql = "SELECT distinct field_id FROM $t_sfv WHERE session_id = '$id_checked'";
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$res_field_ids = @api_sql_query($sql,__FILE__,__LINE__);
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while($row_field_id = Database::fetch_row($res_field_ids)){
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$field_ids[] = $row_field_id[0];
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}
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//delete from table_session_field_value from a given session id
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$sql_session_field_value = "DELETE FROM $t_sfv WHERE session_id = '$id_checked'";
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@api_sql_query($sql_session_field_value,__FILE__,__LINE__);
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$sql = "SELECT distinct field_id FROM $t_sfv";
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$res_field_all_ids = @api_sql_query($sql,__FILE__,__LINE__);
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while($row_field_all_id = Database::fetch_row($res_field_all_ids)){
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$field_all_ids[] = $row_field_all_id[0];
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}
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if (count($field_ids) > 0 && count($field_all_ids) > 0) {
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foreach($field_ids as $field_id) {
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// check if field id is used into table field value
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if (in_array($field_id,$field_all_ids)) {
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continue;
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} else {
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$sql_session_field = "DELETE FROM $t_sf WHERE id = '$field_id'";
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api_sql_query($sql_session_field,__FILE__,__LINE__);
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}
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}
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}
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// add event to system log
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$time = time();
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$user_id = api_get_user_id();
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event_system(LOG_SESSION_DELETE, LOG_SESSION_ID, $id_checked, $time, $user_id);
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}
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/**
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* Subscribes users to the given session and optionally (default) unsubscribes previous users
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
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* @param integer Session ID
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* @param array List of user IDs
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* @param bool Whether to unsubscribe existing users (true, default) or not (false)
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* @return void Nothing, or false on error
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**/
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public static function suscribe_users_to_session ($id_session,$user_list,$empty_users=true) {
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if ($id_session!= strval(intval($id_session))) return false;
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foreach($user_list 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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$course_list=array();
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while($row=Database::fetch_array($result)) {
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$course_list[]=$row['course_code'];
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}
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foreach ($course_list 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, $user_list)) {
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$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 ($user_list 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===true){
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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 ($user_list 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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$nbr_users = count($user_list);
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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($update_sql,__FILE__,__LINE__);
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}
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/** Subscribes courses to the given session and optionally (default) unsubscribes previous users
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* @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
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* @param int Session ID
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* @param array List of courses IDs
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* @param bool Whether to unsubscribe existing users (true, default) or not (false)
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* @return void Nothing, or false on error
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**/
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public static function add_courses_to_session ($id_session, $course_list, $empty_courses=true) {
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// security checks
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if ($id_session!= strval(intval($id_session))) { return false; }
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foreach($course_list as $intCourse){
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if ($intCourse!= strval(intval($intCourse))) { return false; }
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}
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// initialisation
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$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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// get general coach ID
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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 = $id_coach[0];
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// get list of courses subscribed to this session
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$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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$nbr_courses=count($existingCourses);
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// get list of users subscribed to this session
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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($sql,__FILE__,__LINE__);
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$user_list=api_store_result($result);
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// remove existing courses from the session
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if ($empty_courses===true) {
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foreach ($existingCourses as $existingCourse) {
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if (!in_array($existingCourse['course_code'], $course_list)){
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api_sql_query("DELETE FROM $tbl_session_rel_course WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
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api_sql_query("DELETE FROM $tbl_session_rel_course_rel_user WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
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}
|
|
}
|
|
$nbr_courses=0;
|
|
}
|
|
|
|
// Pass through the courses list we want to add to the session
|
|
foreach ($course_list as $enreg_course) {
|
|
$enreg_course = Database::escape_string($enreg_course);
|
|
$exists = false;
|
|
// check if the course we want to add is already subscribed
|
|
foreach ($existingCourses as $existingCourse) {
|
|
if ($enreg_course == $existingCourse['course_code']) {
|
|
$exists=true;
|
|
}
|
|
}
|
|
if (!$exists) {
|
|
//if the course isn't subscribed yet
|
|
$sql_insert_rel_course= "INSERT INTO $tbl_session_rel_course (id_session,course_code, id_coach) VALUES ('$id_session','$enreg_course','$id_coach')";
|
|
api_sql_query($sql_insert_rel_course ,__FILE__,__LINE__);
|
|
//We add the current course in the existing courses array, to avoid adding another time the current course
|
|
$existingCourses[]=array('course_code'=>$enreg_course);
|
|
$nbr_courses++;
|
|
|
|
// subscribe all the users from the session to this course inside the session
|
|
$nbr_users=0;
|
|
foreach ($user_list as $enreg_user) {
|
|
$enreg_user_id = Database::escape_string($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_id')";
|
|
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__);
|
|
}
|
|
}
|
|
api_sql_query("UPDATE $tbl_session SET nbr_courses=$nbr_courses WHERE id='$id_session'",__FILE__,__LINE__);
|
|
}
|
|
|
|
/**
|
|
* Creates a new extra field for a given session
|
|
* @param string Field's internal variable name
|
|
* @param int Field's type
|
|
* @param string Field's language var name
|
|
* @return int new extra field id
|
|
*/
|
|
public static function create_session_extra_field ($fieldvarname, $fieldtype, $fieldtitle) {
|
|
// database table definition
|
|
$t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
|
|
$fieldvarname = Database::escape_string($fieldvarname);
|
|
$fieldtitle = Database::escape_string($fieldtitle);
|
|
$fieldtype = (int)$fieldtype;
|
|
$time = time();
|
|
$sql_field = "SELECT id FROM $t_sf WHERE field_variable = '$fieldvarname'";
|
|
$res_field = api_sql_query($sql_field,__FILE__,__LINE__);
|
|
|
|
$r_field = Database::fetch_row($res_field);
|
|
|
|
if (Database::num_rows($res_field)>0) {
|
|
$field_id = $r_field[0];
|
|
} else {
|
|
// save new fieldlabel into course_field table
|
|
$sql = "SELECT MAX(field_order) FROM $t_sf";
|
|
$res = api_sql_query($sql,__FILE__,__LINE__);
|
|
|
|
$order = 0;
|
|
if (Database::num_rows($res)>0) {
|
|
$row = Database::fetch_row($res);
|
|
$order = $row[0]+1;
|
|
}
|
|
|
|
$sql = "INSERT INTO $t_sf
|
|
SET field_type = '$fieldtype',
|
|
field_variable = '$fieldvarname',
|
|
field_display_text = '$fieldtitle',
|
|
field_order = '$order',
|
|
tms = FROM_UNIXTIME($time)";
|
|
$result = api_sql_query($sql,__FILE__,__LINE__);
|
|
|
|
$field_id=Database::get_last_insert_id();
|
|
}
|
|
return $field_id;
|
|
}
|
|
|
|
/**
|
|
* Update an extra field value for a given session
|
|
* @param integer Course ID
|
|
* @param string Field variable name
|
|
* @param string Field value
|
|
* @return boolean true if field updated, false otherwise
|
|
*/
|
|
public static function update_session_extra_field_value ($session_id,$fname,$fvalue='') {
|
|
|
|
$t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
|
|
$t_sfv = Database::get_main_table(TABLE_MAIN_SESSION_FIELD_VALUES);
|
|
$fname = Database::escape_string($fname);
|
|
$session_id = (int)$session_id;
|
|
$fvalues = '';
|
|
if(is_array($fvalue))
|
|
{
|
|
foreach($fvalue as $val)
|
|
{
|
|
$fvalues .= Database::escape_string($val).';';
|
|
}
|
|
if(!empty($fvalues))
|
|
{
|
|
$fvalues = substr($fvalues,0,-1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$fvalues = Database::escape_string($fvalue);
|
|
}
|
|
|
|
$sqlsf = "SELECT * FROM $t_sf WHERE field_variable='$fname'";
|
|
$ressf = api_sql_query($sqlsf,__FILE__,__LINE__);
|
|
if(Database::num_rows($ressf)==1)
|
|
{ //ok, the field exists
|
|
// Check if enumerated field, if the option is available
|
|
$rowsf = Database::fetch_array($ressf);
|
|
|
|
$tms = time();
|
|
$sqlsfv = "SELECT * FROM $t_sfv WHERE session_id = '$session_id' AND field_id = '".$rowsf['id']."' ORDER BY id";
|
|
$ressfv = api_sql_query($sqlsfv,__FILE__,__LINE__);
|
|
$n = Database::num_rows($ressfv);
|
|
if ($n>1) {
|
|
//problem, we already have to values for this field and user combination - keep last one
|
|
while($rowsfv = Database::fetch_array($ressfv))
|
|
{
|
|
if($n > 1)
|
|
{
|
|
$sqld = "DELETE FROM $t_sfv WHERE id = ".$rowsfv['id'];
|
|
$resd = api_sql_query($sqld,__FILE__,__LINE__);
|
|
$n--;
|
|
}
|
|
$rowsfv = Database::fetch_array($ressfv);
|
|
if($rowsfv['field_value'] != $fvalues)
|
|
{
|
|
$sqlu = "UPDATE $t_sfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowsfv['id'];
|
|
$resu = api_sql_query($sqlu,__FILE__,__LINE__);
|
|
return($resu?true:false);
|
|
}
|
|
return true;
|
|
}
|
|
} else if ($n==1) {
|
|
//we need to update the current record
|
|
$rowsfv = Database::fetch_array($ressfv);
|
|
if($rowsfv['field_value'] != $fvalues)
|
|
{
|
|
$sqlu = "UPDATE $t_sfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowsfv['id'];
|
|
//error_log('UM::update_extra_field_value: '.$sqlu);
|
|
$resu = api_sql_query($sqlu,__FILE__,__LINE__);
|
|
return($resu?true:false);
|
|
}
|
|
return true;
|
|
} else {
|
|
$sqli = "INSERT INTO $t_sfv (session_id,field_id,field_value,tms) " .
|
|
"VALUES ('$session_id',".$rowsf['id'].",'$fvalues',FROM_UNIXTIME($tms))";
|
|
//error_log('UM::update_extra_field_value: '.$sqli);
|
|
$resi = api_sql_query($sqli,__FILE__,__LINE__);
|
|
return($resi?true:false);
|
|
}
|
|
} else {
|
|
return false; //field not found
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks the relationship between an Session and a Course (return the num_rows)
|
|
* @param int user id
|
|
* @param int url id
|
|
* @return int num_rows or false if there are not fields
|
|
* */
|
|
public static function relation_session_course_exist ($session_id, $course_id) {
|
|
$tbl_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
|
|
$return_value = false;
|
|
$sql= "SELECT course_code FROM $tbl_session_course WHERE id_session = ".Database::escape_string($session_id)." AND course_code = '".Database::escape_string($course_id)."'";
|
|
$result = api_sql_query($sql, __FILE__, __LINE__);
|
|
$num = Database::num_rows($result);
|
|
if ($num>0) {
|
|
$return_value = true;
|
|
}
|
|
return $return_value;
|
|
}
|
|
|
|
/**
|
|
* Get the session information by name
|
|
* @param string session name
|
|
* @return mixed false if the session does not exist, array if the session exist
|
|
* */
|
|
public static function get_session_by_name ($session_name) {
|
|
$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
|
|
$sql = 'SELECT id, id_coach, date_start, date_end FROM '.$tbl_session.' WHERE name="'.Database::escape_string($session_name).'"';
|
|
$result = api_sql_query($sql, __FILE__, __LINE__);
|
|
$num = Database::num_rows($result);
|
|
if ($num>0){
|
|
return Database::fetch_array($result);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
} |