bounce.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                       */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2010                                      */
   6 /* Inclusive Design Institute                                   */
   7 /* http://atutor.ca                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                */
  12 /****************************************************************/
  13 // $Id$
  14
  15 function apply_category_theme($category_id) {
  16         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
  17                 global $db;
  18
  19                 if ($category_id) {
  20                         // apply the theme for this category:
  21                         $sql    = "SELECT theme FROM ".TABLE_PREFIX."course_cats WHERE cat_id=$category_id";
  22                         $result = mysql_query($sql, $db);
  23                         if (($cat_row = mysql_fetch_assoc($result)) && $cat_row['theme']) {
  24                                 $_SESSION['prefs']['PREF_THEME'] = $cat_row['theme'];
  25                         } else {
  26                                 $th = get_default_theme();
  27                                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
  28                         }
  29                 } else {
  30                         $th = get_default_theme();
  31                         $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
  32                 }
  33         }
  34 }
  35
  36 function count_login( ) {
  37         global $db, $moduleFactory;
  38
  39         $module =& $moduleFactory->getModule(AT_MODULE_DIR_STANDARD.'/statistics');
  40         if (!$module->isEnabled()) {
  41                 return;
  42         }
  43         if ($_SESSION['is_guest']) {
  44             $sql   = "INSERT INTO ".TABLE_PREFIX."course_stats VALUES ($_SESSION[course_id], NOW(), 1, 0)";
  45         } else {
  46            $sql    = "INSERT INTO ".TABLE_PREFIX."course_stats VALUES ($_SESSION[course_id], NOW(), 0, 1)";
  47         }
  48
  49     $result = @mysql_query($sql, $db);
  50
  51     if (!$result) {
  52                 /* that entry already exists, then update it. */
  53                 if ($_SESSION['is_guest']) {
  54                         $sql   = "UPDATE ".TABLE_PREFIX."course_stats SET guests=guests+1 WHERE course_id=$_SESSION[course_id] AND login_date=CURDATE()";
  55                 } else {
  56                         $sql   = "UPDATE ".TABLE_PREFIX."course_stats SET members=members+1 WHERE course_id=$_SESSION[course_id] AND login_date=CURDATE()";
  57                 }
  58                 $result = @mysql_query($sql, $db);
  59         }
  60 }
  61
  62 function get_groups($course_id) {
  63         global $db;
  64
  65         $groups = array();
  66
  67         if (authenticate(AT_PRIV_GROUPS, true)) {
  68                 $sql = "SELECT G.group_id FROM ".TABLE_PREFIX."groups G INNER JOIN ".TABLE_PREFIX."groups_types T USING (type_id) WHERE T.course_id=$course_id";
  69         } else {
  70                 $sql = "SELECT G.group_id FROM ".TABLE_PREFIX."groups G INNER JOIN (".TABLE_PREFIX."groups_types T, ".TABLE_PREFIX."groups_members M) ON (G.type_id=T.type_id AND  G.group_id=M.group_id) WHERE T.course_id=$course_id AND M.member_id=$_SESSION[member_id]";
  71         }
  72         $result = mysql_query($sql, $db);
  73         while ($row = mysql_fetch_assoc($result)) {
  74                 $groups[$row['group_id']] = $row['group_id'];
  75         }
  76
  77         return $groups;
  78 }
  79
  80 $_user_location = 'public';
  81 define('AT_INCLUDE_PATH', 'include/');
  82 require(AT_INCLUDE_PATH.'vitals.inc.php');
  83
  84 if($_config['just_social'] == 1){
  85         header('Location: mods/_standard/social/index_mystart.php');
  86         exit;
  87 }
  88 $set_to_public = false;
  89 if ($_SERVER['PHP_SELF'] == $_base_path."acl.php") {
  90         //search through the auth table and find password that matches get password
  91         $key = $addslashes(key($_GET));
  92         $sql = "SELECT * FROM ".TABLE_PREFIX."course_access WHERE password='$key' AND (expiry_date > NOW() OR expiry_date+0 = 0) AND enabled=1";
  93         $result = mysql_query($sql, $db);
  94         if ($row = mysql_fetch_assoc($result)) {
  95                 $set_to_public = true;
  96                 $_REQUEST['course'] = $row['course_id'];
  97                 $_SESSION['member_id'] = 0;
  98                 $_SESSION['valid_user'] = false;
  99                 $_SESSION['login'] = 'guest';
 100         }
 101 }
 102
 103
 104 if (isset($_GET['admin']) && isset($_SESSION['is_super_admin'])) {
 105         $sql = "SELECT login, `privileges`, language FROM ".TABLE_PREFIX."admins WHERE login='$_SESSION[is_super_admin]' AND `privileges`>0";
 106         $result = mysql_query($sql, $db);
 107
 108         if ($row = mysql_fetch_assoc($result)) {
 109                 $sql = "UPDATE ".TABLE_PREFIX."admins SET last_login=NOW() WHERE login='$_SESSION[is_super_admin]'";
 110                 mysql_query($sql, $db);
 111
 112                 $_SESSION['login']              = $row['login'];
 113                 $_SESSION['valid_user'] = true;
 114                 $_SESSION['course_id']  = -1;
 115                 $_SESSION['privileges'] = intval($row['privileges']);
 116                 $_SESSION['lang'] = $row['language'];
 117                 assign_session_prefs(unserialize(stripslashes($_config['pref_defaults'])), 1);
 118                 unset($_SESSION['member_id']);
 119                 unset($_SESSION['is_super_admin']);
 120
 121                 write_to_log(AT_ADMIN_LOG_UPDATE, 'admins', mysql_affected_rows($db), $sql);
 122
 123                 $msg->addFeedback('LOGIN_SUCCESS');
 124
 125                 header('Location: admin/index.php');
 126                 exit;
 127         }
 128 }
 129
 130 if (!empty($_REQUEST['pu'])) {
 131         //request ib stands for 'is bounced', this is to avoid the infinite 302 redirect
 132         //A better way to deal with this rather than using querystring? (Session won't work)
 133         //Session doesn't work,leads to bounce out error as well.
 134         if (!empty($_REQUEST['ib'])) {
 135                 return;
 136         }
 137
 138         //for pretty url iff mod_rewrite is not on
 139         if ($_config['apache_mod_rewrite'] > 0){
 140                 //URL are in pretty format, but not in .htaccess RewriteRule format
 141                 //http://www.atutor.ca/atutor/mantis/view.php?id=3426
 142                 $page = url_rewrite($_REQUEST['pu'], AT_PRETTY_URL_NOT_HEADER, true) . '/ib/1';
 143         } else {
 144                 if ($_config['pretty_url'])
 145                 {
 146                         $orig_url = AT_PRETTY_URL_HANDLER.$_REQUEST['pu'];
 147                         $page = (substr($_REQUEST['pu'], -1) == '/') ? ($orig_url. 'ib/1/') : ($orig_url .'/ib/1/');
 148                 }
 149                 else
 150                         $page = AT_PRETTY_URL_HANDLER.$_REQUEST['pu'] . SEP .'ib=1';
 151         }
 152 } elseif (!empty($_REQUEST['p'])) {
 153         //For search
 154     //p is a relative path, check that.  #4773
 155     if (strpos($_REQUEST['p'], 'http') !== false) {
 156         //if not relative, reset it.
 157         $_REQUEST['p'] = "";
 158     }
 159         $page = urldecode($_REQUEST['p']);
 160 } elseif (($_config['pretty_url'] > 0) && preg_match('/bounce.php\?course=([\d]+)$/', $_SERVER['REQUEST_URI'])==1) {
 161         //for browse, and my start page url rewrite.
 162         $page = url_rewrite($_SERVER['REQUEST_URI'], AT_PRETTY_URL_NOT_HEADER, true).'/index.php';      //force overwrite
 163 } else {
 164         //handles jump menu
 165         if (isset($_POST['jump']) && abs($_POST['course']) > 0){
 166                 $_SESSION['course_id'] = abs($_POST['course']);
 167         }
 168         $page = url_rewrite('index.php');
 169 }
 170
 171 if (substr($page, 0, 1) == '/') {
 172         $page = substr($page, 1);
 173 }
 174
 175 $_SESSION['enroll']             = AT_ENROLL_NO;
 176 $_SESSION['s_cid']              = 0;
 177 $_SESSION['privileges'] = 0;
 178 $_SESSION['is_admin']   = false;
 179
 180 if ($_SESSION['course_id'] == -1) {
 181         unset($_SESSION['valid_user']);
 182         unset($_SESSION['is_guest']);
 183         unset($_SESSION['login']);
 184         unset($_SESSION['is_admin']);
 185         unset($_SESSION['course_id']);
 186 }
 187
 188 if (isset($_REQUEST['course'])) { // is set guests access protected course
 189         $course = abs($_REQUEST['course']);
 190 } else if (isset($_REQUEST['p_course'])) { // is set when pretty url is turned on, access public course
 191         $course = abs($_REQUEST['p_course']);
 192 } else {
 193         $course = 0;
 194 }
 195
 196 if (($course === 0) && $_SESSION['valid_user']) {
 197         $_SESSION['course_id']    = 0;
 198         $_SESSION['last_updated'] = time()/60 - ONLINE_UPDATE - 1;
 199
 200         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
 201                 $th = get_default_theme();
 202                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
 203         }
 204     /* http://atutor.ca/atutor/mantis/view.php?id=4587
 205      *  for users with no enrolled courses, default to the Browse Bourses screen instead of My Courses.
 206      */
 207     $sql = 'SELECT COUNT(*) AS count FROM '.TABLE_PREFIX.'course_enrollment WHERE member_id='.$_SESSION['member_id'];
 208     $result = mysql_query($sql, $db);
 209     $row = mysql_fetch_assoc($result);
 210     if ($row['count'] == 0) {
 211         header('Location: users/browse.php');
 212         exit;
 213     }
 214         header('Location: users/index.php');
 215         exit;
 216 } else if (($course === 0) && !$_SESSION['valid_user']) { // guests
 217         header('Location: '.AT_BASE_HREF.'login.php');
 218         exit;
 219 } else if ($course == -1) {
 220         $_SESSION['course_id']    = 0;
 221         $_SESSION['last_updated'] = time()/60 - ONLINE_UPDATE - 1;
 222
 223         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
 224                 $th = get_default_theme();
 225                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
 226         }
 227
 228         header('Location: users/index.php');
 229         exit;
 230 }
 231
 232 $sql    = "SELECT member_id, content_packaging, cat_id, access, title, UNIX_TIMESTAMP(release_date) AS u_release_date, UNIX_TIMESTAMP(end_date) AS u_end_date FROM ".TABLE_PREFIX."courses WHERE course_id=$course";
 233 $result = mysql_query($sql,$db);
 234 if (!$row = mysql_fetch_assoc($result)) {
 235         $msg->addError('ITEM_NOT_FOUND');
 236         if ($_SESSION['member_id']) {
 237                 header('Location: '.AT_BASE_HREF.'users/index.php');
 238         } else {
 239                 header('Location: '.AT_BASE_HREF.'login.php');
 240         }
 241         exit;
 242 }
 243
 244 if (!$_SESSION['member_id']) {
 245         assign_session_prefs(unserialize(stripslashes($_config['pref_defaults'])), 1);
 246 }
 247
 248 $owner_id = $row['member_id'];
 249 $_SESSION['packaging'] = $row['content_packaging'];
 250
 251 $_SESSION['groups'] = array();
 252 unset($_SESSION['fs_owner_type']);
 253 unset($_SESSION['fs_owner_id']);
 254 unset($_SESSION['fs_folder_id']);
 255
 256 //check for acl var
 257 if ($set_to_public) {
 258         $row['access'] = "public";
 259 }
 260
 261 switch ($row['access']){
 262         case 'public':
 263                 if ($_GET['f']) {
 264                         $dest = './'.$page.'?f='.$addslashes($_GET['f']);
 265                 } /* else */
 266                 $dest = './'.$page;
 267
 268                 apply_category_theme($row['cat_id']);
 269
 270                 if (!$_SESSION['valid_user'] && ($row['u_release_date'] < time()) && (!$row['u_end_date'] || $row['u_end_date'] > time())) {
 271                         $_SESSION['course_id']    = $course;
 272                         /* guest login */
 273                         $_SESSION['login']              = 'guest';
 274                         $_SESSION['valid_user'] = false;
 275                         $_SESSION['member_id']  = 0;
 276                         $_SESSION['is_admin']   = false;
 277                         $_SESSION['is_guest']   = true;
 278
 279                         /* add guest login to counter: */
 280                         count_login();
 281                         if ($_config['pretty_url'])
 282                         {
 283                                 if (!strpos($dest, '/p_course/')) $dest .= '/p_course/'.$course;
 284                                 header('Location: '.$dest);
 285                                 exit;
 286                         }
 287                 } else if (!$_SESSION['valid_user']) {
 288                         if ($row['u_release_date'] > time()) {
 289                                 $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 290                         } else {
 291                                 $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 292                         }
 293                         header('Location: '.AT_BASE_HREF.'browse.php');
 294                         exit;
 295
 296                 } else {
 297                         $_SESSION['course_id']    = $course;
 298                         /* check if we're an admin here */
 299                         if ($owner_id == $_SESSION['member_id']) {
 300                                 $_SESSION['is_admin'] = true;
 301                                 $_SESSION['enroll']       = AT_ENROLL_YES;
 302                         } else {
 303                                 $_SESSION['is_admin'] = false;
 304                         }
 305                 }
 306
 307                 /* title wont be needed. comes from the cache. */
 308                 $_SESSION['course_title'] = $row['title'];
 309
 310                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 311                 $result = mysql_query($sql, $db);
 312                 if ($row2 = mysql_fetch_assoc($result)) {
 313                         /* we have requested or are enrolled in this course */
 314                         $_SESSION['enroll'] = AT_ENROLL_YES;
 315                         $_SESSION['s_cid']  = $row2['last_cid'];
 316                         $_SESSION['privileges'] = $row2['privileges'];
 317                 }
 318
 319                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 320                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 321                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 322                         exit;
 323                 } else if ($row['u_release_date'] > time()) {
 324                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 325
 326                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 327                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 328                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 329                         exit;
 330                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 331                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 332                 }
 333
 334                 /* add member login to counter: */
 335                 if (!$_SESSION['is_admin'] && $_SESSION['member_id'] > 0) {
 336                         count_login();
 337                 }
 338
 339                 /* update users_online  */
 340                 add_user_online();
 341
 342                 $_SESSION['groups'] = get_groups($course);
 343
 344                 header('Location: '.$dest);
 345                 exit;
 346
 347                 break;
 348
 349         case 'protected':
 350                 if (!$_SESSION['valid_user']) {
 351                         header('Location: ./login.php?course='.intval($course));
 352                         exit;
 353                 } /* else */
 354                 /* we're already logged in */
 355                 $_SESSION['course_id'] = $course;
 356
 357                 apply_category_theme($row['cat_id']);
 358
 359                 /* check if we're an admin here */
 360                 if ($owner_id == $_SESSION['member_id']) {
 361                         $_SESSION['is_admin'] = true;
 362                         $_SESSION['enroll']       = AT_ENROLL_YES;
 363                 } else {
 364                         $_SESSION['is_admin'] = false;
 365                         /* add member login to counter: */
 366                         count_login();
 367                 }
 368
 369                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 370                 $result = mysql_query($sql, $db);
 371                 if ($row2 = mysql_fetch_assoc($result)) {
 372                         /* we have requested or are enrolled in this course */
 373                         $_SESSION['enroll'] = AT_ENROLL_YES;
 374                         $_SESSION['s_cid']  = $row2['last_cid'];
 375                         $_SESSION['privileges'] = $row2['privileges'];
 376                 }
 377
 378                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 379                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 380                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 381                         exit;
 382                 } else if ($row['u_release_date'] > time()) {
 383                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 384
 385                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 386                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 387                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 388                         exit;
 389                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 390                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 391                 }
 392
 393
 394                 $_SESSION['course_title'] = $row['title'];
 395
 396                 /* update users_online  */
 397                 add_user_online();
 398
 399                 $_SESSION['groups'] = get_groups($course);
 400
 401                 if ($_GET['f']) {
 402                         header('Location: ./'.$page.'?f='.$addslashes($_GET['f']));
 403                         exit;
 404                 } /* else */
 405                 header('Location: ./'.$addslashes($page));
 406                 exit;
 407
 408                 break;
 409
 410         case 'private':
 411                 if (!$_SESSION['valid_user']) {
 412                         /* user not logged in: */
 413                         header('Location: ./login.php?course='.intval($course));
 414                         exit;
 415                 } /* else */
 416
 417                 if ($owner_id == $_SESSION['member_id']) {
 418                         /* we own this course. so we dont have to enroll or get the groups */
 419
 420                         $_SESSION['is_admin']  = true;
 421                         $_SESSION['course_id'] = $course;
 422                         $_SESSION['course_title'] = $row['title'];
 423                         $_SESSION['enroll']       = AT_ENROLL_YES;
 424
 425                         $sql    = "SELECT last_cid FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 426                         $result = mysql_query($sql, $db);
 427                         $row2 = mysql_fetch_assoc($result);
 428
 429                         $_SESSION['s_cid']  = $row2['last_cid'];
 430
 431                         /* update users_online */
 432                         add_user_online();
 433
 434                         apply_category_theme($row['cat_id']);
 435
 436                         $_SESSION['groups'] = get_groups($course);
 437
 438                         if (!empty($_GET['f'])) {
 439                                 header('Location: ./'.$page.'?f='.$addslashes($_GET['f']));
 440                                 exit;
 441                         } /* else */
 442                         if ($row['u_release_date'] > time()) {
 443                                 $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 444                         } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 445                                 $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 446                         }
 447                         header('Location: ./'.$addslashes($page));
 448                         exit;
 449                 }
 450
 451                 /* check if we're enrolled */
 452                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 453                 $result = mysql_query($sql, $db);
 454
 455                 if (!$row2 = mysql_fetch_assoc($result)) {
 456                         /* we have not requested enrollment in this course */
 457                         $_SESSION['course_id'] = 0;
 458                         header('Location: users/private_enroll.php?course='.intval($course));
 459                         exit;
 460                 } /* else */
 461
 462                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 463                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 464                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 465                         exit;
 466                 } else if ($row['u_release_date'] > time()) {
 467                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 468
 469                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 470                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 471                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 472                         exit;
 473                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 474                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 475                 }
 476                 /* we have requested or are enrolled in this course */
 477
 478                 apply_category_theme($row['cat_id']);
 479
 480                 $_SESSION['enroll'] = AT_ENROLL_YES;
 481                 $_SESSION['s_cid']  = $row2['last_cid'];
 482
 483                 if ($row2['approved'] == 'n') {
 484                         /* we have not been approved to enroll in this course */
 485                         $_SESSION['course_id'] = 0;
 486                         header('Location: users/private_enroll.php?course='.$course);
 487                         exit;
 488                 } /* else */
 489
 490                 /* enrollment has been approved or student is alumni */
 491                 if ($row2['approved'] == 'a') {
 492                         $_SESSION['enroll'] = AT_ENROLL_ALUMNUS;
 493                 }
 494                 /* we're already logged in */
 495                 $_SESSION['course_id'] = $course;
 496
 497                 /* check if we're an admin here */
 498                 $_SESSION['privileges'] = $row2['privileges'];
 499                 $_SESSION['course_title'] = $row['title'];
 500
 501                 /* update users_online                  */
 502                 add_user_online();
 503
 504                 $_SESSION['groups'] = get_groups($course);
 505
 506                 /* add member login to counter: */
 507                 count_login();
 508
 509                 if($_GET['f']){
 510                         header('Location: '.$page.'?f='.$addslashes($_GET['f']));
 511                         exit;
 512                 } /* else */
 513                 header('Location: '.$addslashes($page));
 514                 exit;
 515         break;
 516 } // end switch
 517
 518
 519 ?>