index.php 30 KB

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  1. <?php // $Id: index.php 17648 2009-01-11 23:08:49Z iflorespaz $
  2. /*
  3. ==============================================================================
  4. Dokeos - elearning and course management software
  5. Copyright (c) 2004-2008 Dokeos SPRL
  6. Copyright (c) 2003 Ghent University (UGent)
  7. Copyright (c) 2001 Universite catholique de Louvain (UCL)
  8. Copyright (c) various contributors
  9. For a full list of contributors, see "credits.txt".
  10. The full license can be read in "license.txt".
  11. This program is free software; you can redistribute it and/or
  12. modify it under the terms of the GNU General Public License
  13. as published by the Free Software Foundation; either version 2
  14. of the License, or (at your option) any later version.
  15. See the GNU General Public License for more details.
  16. Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
  17. Mail: info@dokeos.com
  18. ==============================================================================
  19. */
  20. /**
  21. * @package dokeos.main
  22. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Refactoring
  23. * @version $Id: index.php 17648 2009-01-11 23:08:49Z iflorespaz $
  24. * @todo check the different @todos in this page and really do them
  25. * @todo check if the news management works as expected
  26. */
  27. // only this script should have this constant defined. This is used to activate the javascript that
  28. // gives the login name automatic focus in header.inc.html.
  29. /** @todo Couldn't this be done using the $HtmlHeadXtra array? */
  30. define('DOKEOS_HOMEPAGE', true);
  31. // the language file
  32. $language_file = array ('courses', 'index');
  33. /* Flag forcing the 'current course' reset, as we're not inside a course anymore */
  34. // maybe we should change this into an api function? an example: Coursemanager::unset();
  35. $cidReset = true;
  36. /*
  37. -----------------------------------------------------------
  38. Included libraries
  39. -----------------------------------------------------------
  40. */
  41. /** @todo make all the library files consistent, use filename.lib.php and not filename.lib.inc.php */
  42. require_once ('main/inc/global.inc.php');
  43. include_once (api_get_path(LIBRARY_PATH).'course.lib.php');
  44. include_once (api_get_path(LIBRARY_PATH).'debug.lib.inc.php');
  45. include_once (api_get_path(LIBRARY_PATH).'events.lib.inc.php');
  46. include_once (api_get_path(LIBRARY_PATH).'system_announcements.lib.php');
  47. include_once (api_get_path(LIBRARY_PATH).'groupmanager.lib.php');
  48. include_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
  49. require_once 'main/chat/chat_functions.lib.php';
  50. $loginFailed = isset($_GET['loginFailed']) ? true : isset($loginFailed);
  51. $setting_show_also_closed_courses = (api_get_setting('show_closed_courses')=='true') ? true : false;
  52. // the section (for the tabs)
  53. $this_section = SECTION_CAMPUS;
  54. /*
  55. -----------------------------------------------------------
  56. Action Handling
  57. -----------------------------------------------------------
  58. */
  59. /** @todo wouldn't it make more sense if this would be done in local.inc.php so that local.inc.php become the only place where authentication is done?
  60. * by doing this you could logout from any page instead of only from index.php. From the moment there is a logout=true in the url you will be logged out
  61. * this can be usefull when you are on an open course and you need to log in to edit something and you immediately want to check how anonymous users
  62. * will see it.
  63. */
  64. $my_user_id=api_get_user_id();
  65. if (!empty($_GET['logout'])) {
  66. logout();
  67. }
  68. /*
  69. -----------------------------------------------------------
  70. Table definitions
  71. -----------------------------------------------------------
  72. */
  73. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  74. $main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
  75. $track_login_table = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  76. /*
  77. -----------------------------------------------------------
  78. Constants and CONFIGURATION parameters
  79. -----------------------------------------------------------
  80. */
  81. /** @todo these configuration settings should move to the dokeos config settings */
  82. /** defines wether or not anonymous visitors can see a list of the courses on the Dokeos homepage that are open to the world */
  83. $_setting['display_courses_to_anonymous_users'] = 'true';
  84. /** @todo remove this piece of code because this is not used */
  85. if (isset ($_user['user_id'])) {
  86. $nameTools = api_get_setting('siteName');
  87. }
  88. /*
  89. ==============================================================================
  90. LOGIN
  91. ==============================================================================
  92. */
  93. /**
  94. * @todo This piece of code should probably move to local.inc.php where the actual login / logout procedure is handled.
  95. * @todo consider removing this piece of code because does nothing.
  96. */
  97. if (isset($_GET['submitAuth']) && $_GET['submitAuth'] == 1) {
  98. // nice lie!!!
  99. echo 'Attempted breakin - sysadmins notified.';
  100. session_destroy();
  101. die();
  102. }
  103. /**
  104. * @todo This piece of code should probably move to local.inc.php where the actual login procedure is handled.
  105. * @todo check if this code is used. I think this code is never executed because after clicking the submit button
  106. * the code does the stuff in local.inc.php and then redirects to index.php or user_portal.php depending
  107. * on api_get_setting('page_after_login')
  108. */
  109. if (!empty($_POST["submitAuth"])) {
  110. // the user is already authenticated, we now find the last login of the user.
  111. if (isset ($_user['user_id'])) {
  112. $sql_last_login = "SELECT UNIX_TIMESTAMP(login_date)
  113. FROM $track_login_table
  114. WHERE login_user_id = '".$_user['user_id']."'
  115. ORDER BY login_date DESC LIMIT 1";
  116. $result_last_login = api_sql_query($sql_last_login, __FILE__, __LINE__);
  117. if (!$result_last_login)
  118. if (Database::num_rows($result_last_login) > 0) {
  119. $user_last_login_datetime = Database::fetch_array($result_last_login);
  120. $user_last_login_datetime = $user_last_login_datetime[0];
  121. api_session_register('user_last_login_datetime');
  122. }
  123. mysql_free_result($result_last_login);
  124. //event_login();
  125. if (api_is_platform_admin()) {
  126. // decode all open event informations and fill the track_c_* tables
  127. include (api_get_path(LIBRARY_PATH)."stats.lib.inc.php");
  128. decodeOpenInfos();
  129. }
  130. }
  131. } // end login -- if($_POST["submitAuth"])
  132. else {
  133. // only if login form was not sent because if the form is sent the user was already on the page.
  134. event_open();
  135. }
  136. // the header
  137. Display :: display_header('', 'dokeos');
  138. /*
  139. ==============================================================================
  140. MAIN CODE
  141. ==============================================================================
  142. */
  143. echo '<div class="maincontent" id="content">';
  144. // Plugins for loginpage_main AND campushomepage_main
  145. if (!api_get_user_id()) {
  146. api_plugin('loginpage_main');
  147. } else {
  148. api_plugin('campushomepage_main');
  149. }
  150. // Including the page for the news
  151. $page_included = false;
  152. if (!empty ($_GET['include']) && preg_match('/^[a-zA-Z0-9_-]*\.html$/',$_GET['include'])) {
  153. include ('./home/'.$_GET['include']);
  154. $page_included = true;
  155. } else {
  156. if (!empty($_SESSION['user_language_choice'])) {
  157. $user_selected_language=$_SESSION['user_language_choice'];
  158. } elseif(!empty($_SESSION['_user']['language'])) {
  159. $user_selected_language=$_SESSION['_user']['language'];
  160. } else {
  161. $user_selected_language=get_setting('platformLanguage');
  162. }
  163. if(!file_exists('home/home_news_'.$user_selected_language.'.html')) {
  164. $home_top_temp=file('home/home_top.html');
  165. $home_top_temp=implode('',$home_top_temp);
  166. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  167. echo $open;
  168. } else {
  169. if(file_exists('home/home_top_'.$user_selected_language.'.html')) {
  170. $home_top_temp = file_get_contents('home/home_top_'.$user_selected_language.'.html');
  171. } else {
  172. $home_top_temp = file_get_contents('home/home_top.html');
  173. }
  174. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  175. echo $open;
  176. }
  177. }
  178. // Display System announcements
  179. $announcement = isset($_GET['announcement']) ? $_GET['announcement'] : -1;
  180. $announcement = intval($announcement);
  181. if (isset($_user['user_id'])) {
  182. $visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
  183. SystemAnnouncementManager :: display_announcements($visibility, $announcement);
  184. } else {
  185. SystemAnnouncementManager :: display_announcements(VISIBLE_GUEST, $announcement);
  186. }
  187. // Display courses and category list
  188. if (!$page_included) {
  189. if (api_get_setting('display_categories_on_homepage') == 'true') {
  190. echo '<div class="home_cats">';
  191. display_anonymous_course_list();
  192. echo '</div>';
  193. }
  194. }
  195. echo '</div>';
  196. // display right menu: language form, login section + useful weblinks
  197. echo '<div class="menu" id="menu">';
  198. display_anonymous_right_menu();
  199. echo '</div>';
  200. /*
  201. ==============================================================================
  202. FOOTER
  203. ==============================================================================
  204. */
  205. Display :: display_footer();
  206. /**
  207. * This function handles the logout and is called whenever there is a $_GET['logout']
  208. *
  209. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  210. */
  211. function logout() {
  212. global $_configuration, $extAuthSource;
  213. // variable initialisation
  214. $query_string='';
  215. if (!empty($_SESSION['user_language_choice'])) {
  216. $query_string='?language='.$_SESSION['user_language_choice'];
  217. }
  218. // Database table definition
  219. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  220. // selecting the last login of the user
  221. $uid = intval($_GET['uid']);
  222. $sql_last_connection="SELECT login_id, login_date FROM $tbl_track_login WHERE login_user_id='$uid' ORDER BY login_date DESC LIMIT 0,1";
  223. $q_last_connection=api_sql_query($sql_last_connection);
  224. if (Database::num_rows($q_last_connection)>0) {
  225. $i_id_last_connection=Database::result($q_last_connection,0,"login_id");
  226. }
  227. if (!isset($_SESSION['login_as'])) {
  228. $current_date=date('Y-m-d H:i:s',time());
  229. $s_sql_update_logout_date="UPDATE $tbl_track_login SET logout_date='".$current_date."' WHERE login_id='$i_id_last_connection'";
  230. api_sql_query($s_sql_update_logout_date);
  231. }
  232. LoginDelete($uid, $_configuration['statistics_database']); //from inc/lib/online.inc.php - removes the "online" status
  233. //the following code enables the use of an external logout function.
  234. //example: define a $extAuthSource['ldap']['logout']="file.php" in configuration.php
  235. // then a function called ldap_logout() inside that file
  236. // (using *authent_name*_logout as the function name) and the following code
  237. // will find and execute it
  238. $uinfo = api_get_user_info($uid);
  239. if (($uinfo['auth_source'] != PLATFORM_AUTH_SOURCE) && is_array($extAuthSource)) {
  240. if (is_array($extAuthSource[$uinfo['auth_source']])) {
  241. $subarray = $extAuthSource[$uinfo['auth_source']];
  242. if (!empty($subarray['logout']) && file_exists($subarray['logout'])) {
  243. include_once($subarray['logout']);
  244. $logout_function = $uinfo['auth_source'].'_logout';
  245. if (function_exists($logout_function)) {
  246. $logout_function($uinfo);
  247. }
  248. }
  249. }
  250. }
  251. exit_of_chat($uid);
  252. api_session_destroy();
  253. header("Location: index.php$query_string");
  254. exit();
  255. }
  256. /**
  257. * This function checks if there are courses that are open to the world in the platform course categories (=faculties)
  258. *
  259. * @param unknown_type $category
  260. * @return boolean
  261. */
  262. function category_has_open_courses($category) {
  263. global $setting_show_also_closed_courses;
  264. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  265. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  266. $sql_query = "SELECT * FROM $main_course_table WHERE category_code='$category'";
  267. $sql_result = api_sql_query($sql_query, __FILE__, __LINE__);
  268. while ($course = Database::fetch_array($sql_result)) {
  269. if ($setting_show_also_closed_courses == false) {
  270. if ((api_get_user_id()>0
  271. and $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  272. or ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  273. return true; //at least one open course
  274. }
  275. } else {
  276. if(isset($course['visibility'])){
  277. return true; //at least one course (does not matter weither it's open or not because $setting_show_also_closed_courses = true
  278. }
  279. }
  280. }
  281. return false;
  282. }
  283. function display_create_course_link() {
  284. echo "<li><a href=\"main/create_course/add_course.php\">".get_lang("CourseCreate")."</a></li>";
  285. }
  286. function display_edit_course_list_links() {
  287. echo "<li><a href=\"main/auth/courses.php\">".get_lang("CourseManagement")."</a></li>";
  288. }
  289. /**
  290. * Displays the right-hand menu for anonymous users:
  291. * login form, useful links, help section
  292. * Warning: function defines globals
  293. * @version 1.0.1
  294. * @todo does $_plugins need to be global?
  295. */
  296. function display_anonymous_right_menu() {
  297. global $loginFailed, $_plugins, $_user, $menu_navigation;
  298. $platformLanguage = api_get_setting('platformLanguage');
  299. if ( !($_user['user_id']) or api_is_anonymous($_user['user_id']) ) { // only display if the user isn't logged in
  300. api_display_language_form(true);
  301. echo '<br />';
  302. display_login_form();
  303. if ($loginFailed) {
  304. handle_login_failed();
  305. }
  306. if (api_get_setting('allow_lostpassword') == 'true' OR api_get_setting('allow_registration') == 'true') {
  307. echo '<div class="menusection"><span class="menusectioncaption">'.get_lang('MenuUser').'</span><ul class="menulist">';
  308. if (get_setting('allow_registration') <> 'false') {
  309. echo '<li><a href="main/auth/inscription.php">'.get_lang('Reg').'</a></li>';
  310. }
  311. if (get_setting('allow_lostpassword') == 'true') {
  312. display_lost_password_info();
  313. }
  314. echo '</ul></div>';
  315. }
  316. if (api_number_of_plugins('loginpage_menu') > 0) {
  317. echo '<div class="note" style="background: none">';
  318. api_plugin('loginpage_menu');
  319. echo '</div>';
  320. }
  321. }
  322. /*** hide right menu "general" and other parts on anonymous right menu *****/
  323. echo "<div class=\"menusection\">", "<span class=\"menusectioncaption\">".get_lang("MenuGeneral")."</span>";
  324. echo "<ul class=\"menulist\">";
  325. $user_selected_language = api_get_interface_language();
  326. if (!isset ($user_selected_language))
  327. $user_selected_language = $platformLanguage;
  328. if (!file_exists('home/home_menu_'.$user_selected_language.'.html')) {
  329. include ('home/home_menu.html');
  330. } else {
  331. include('home/home_menu_'.$user_selected_language.'.html');
  332. }
  333. echo '</ul>';
  334. echo '</div>';
  335. if ($_user['user_id'] && api_number_of_plugins('campushomepage_menu') > 0) {
  336. echo '<div class="note" style="background: none">';
  337. api_plugin('campushomepage_menu');
  338. echo '</div>';
  339. }
  340. /**
  341. * User section
  342. */
  343. if (isset($_SESSION['_user']['user_id']) && $_SESSION['_user']['user_id']!=0) {
  344. // tabs that are deactivated are added here
  345. if (!empty($menu_navigation)) {
  346. echo "<div class=\"menusection\">";
  347. echo "<span class=\"menusectioncaption\">".get_lang("MainNavigation")."</span>";
  348. echo "<ul class=\"menulist\">";
  349. foreach($menu_navigation as $section => $navigation_info) {
  350. $current = ($section == $GLOBALS['this_section'] ? ' id="current"' : '');
  351. echo '<li'.$current.'>';
  352. echo '<a href="'.$navigation_info['url'].'" target="_top">'.$navigation_info['title'].'</a>';
  353. echo '</li>';
  354. echo "\n";
  355. }
  356. echo "</ul>";
  357. echo '</div>';
  358. }
  359. echo "<div class=\"menusection\">";
  360. echo "<span class=\"menusectioncaption\">".get_lang("MenuUser")."</span>";
  361. echo "<ul class=\"menulist\">";
  362. $display_add_course_link = api_is_allowed_to_create_course() && ($_SESSION["studentview"] != "studentenview");
  363. if ($display_add_course_link) {
  364. if (api_get_setting('allow_users_to_create_courses')=='false' && !api_is_platform_admin()) {
  365. //echo get_lang('NotHavePermissionToCreateCourses');
  366. } else {
  367. display_create_course_link();
  368. }
  369. }
  370. display_edit_course_list_links();
  371. echo "</ul>";
  372. echo "</div>";
  373. }
  374. // includes for any files to be displayed below anonymous right menu
  375. if (!file_exists('home/home_notice_'.$user_selected_language.'.html') && file_get_contents('home/home_notice.html')!='') {
  376. echo '<div class="note">';
  377. include ('home/home_notice.html');
  378. echo '</div>';
  379. } elseif(file_exists('home/home_notice_'.$user_selected_language.'.html') && file_get_contents('home/home_notice_'.$user_selected_language.'.html')!='') {
  380. echo '<div class="note">';
  381. include('home/home_notice_'.$user_selected_language.'.html');
  382. echo '</div>';
  383. }
  384. }
  385. /**
  386. * Reacts on a failed login:
  387. * displays an explanation with
  388. * a link to the registration form.
  389. *
  390. * @version 1.0.1
  391. */
  392. function handle_login_failed() {
  393. if (!isset($_GET['error'])) {
  394. $message = get_lang("InvalidId");
  395. if (api_is_self_registration_allowed()) {
  396. $message = get_lang("InvalidForSelfRegistration");
  397. }
  398. } else {
  399. switch ($_GET['error']) {
  400. case '':
  401. $message = get_lang("InvalidId");
  402. if (api_is_self_registration_allowed()) {
  403. $message = get_lang("InvalidForSelfRegistration");
  404. }
  405. break;
  406. case 'account_expired':
  407. $message=get_lang('AccountExpired');
  408. break;
  409. case 'account_inactive':
  410. $message=get_lang('AccountInactive');
  411. break;
  412. case 'user_password_incorrect':
  413. $message=get_lang('InvalidId');
  414. break;
  415. }
  416. }
  417. echo "<div id=\"login_fail\">".$message."</div>";
  418. }
  419. /**
  420. * Adds a form to let users login
  421. * @version 1.1
  422. */
  423. function display_login_form() {
  424. $form = new FormValidator('formLogin');
  425. $form->addElement('text','login',get_lang('UserName'),array('size'=>15));
  426. $form->addElement('password','password',get_lang('Pass'),array('size'=>15));
  427. $form->addElement('submit','submitAuth',get_lang('Ok'));
  428. $renderer =& $form->defaultRenderer();
  429. $renderer->setElementTemplate('<div><label>{label}</label></div><div>{element}</div>');
  430. $form->display();
  431. if (api_get_setting('openid_authentication')=='true') {
  432. include_once('main/auth/openid/login.php');
  433. echo '<div>'.openid_form().'</div>';
  434. }
  435. }
  436. /**
  437. * Displays a link to the lost password section
  438. */
  439. function display_lost_password_info() {
  440. echo "<li><a href=\"main/auth/lostPassword.php\">".get_lang("LostPassword")."</a></li>";
  441. }
  442. /**
  443. * Display list of courses in a category.
  444. * (for anonymous users)
  445. *
  446. * @version 1.1
  447. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University - refactoring and code cleaning
  448. */
  449. function display_anonymous_course_list() {
  450. $ctok = $_SESSION['sec_token'];
  451. $stok = Security::get_token();
  452. //init
  453. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  454. $web_course_path = api_get_path(WEB_COURSE_PATH);
  455. $category = $_GET["category"];
  456. global $setting_show_also_closed_courses;
  457. // Database table definitions
  458. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  459. $main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
  460. $platformLanguage = api_get_setting('platformLanguage');
  461. //get list of courses in category $category
  462. $sql_get_course_list = "SELECT * FROM $main_course_table cours
  463. WHERE category_code = '".Database::escape_string($_GET["category"])."'
  464. ORDER BY title, UPPER(visual_code)";
  465. //removed: AND cours.visibility='".COURSE_VISIBILITY_OPEN_WORLD."'
  466. $sql_result_courses = api_sql_query($sql_get_course_list, __FILE__, __LINE__);
  467. while ($course_result = Database::fetch_array($sql_result_courses)) {
  468. $course_list[] = $course_result;
  469. }
  470. $platform_visible_courses = '';
  471. // $setting_show_also_closed_courses
  472. if($user_identified) {
  473. if ($setting_show_also_closed_courses) {
  474. $platform_visible_courses = '';
  475. } else {
  476. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' OR t3.visibility='".COURSE_VISIBILITY_OPEN_PLATFORM."' )";
  477. }
  478. } else {
  479. if ($setting_show_also_closed_courses) {
  480. $platform_visible_courses = '';
  481. } else {
  482. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' )";
  483. }
  484. }
  485. $sqlGetSubCatList = "
  486. SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
  487. FROM $main_category_table t1
  488. LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
  489. LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
  490. WHERE t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
  491. GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
  492. $resCats = api_sql_query($sqlGetSubCatList, __FILE__, __LINE__);
  493. $thereIsSubCat = false;
  494. if (Database::num_rows($resCats) > 0) {
  495. $htmlListCat = "<h4 style=\"margin-top: 0px;\">".get_lang("CatList")."</h4>"."<ul>";
  496. while ($catLine = Database::fetch_array($resCats)) {
  497. if ($catLine['code'] != $category) {
  498. $category_has_open_courses = category_has_open_courses($catLine['code']);
  499. if ($category_has_open_courses) {
  500. //the category contains courses accessible to anonymous visitors
  501. $htmlListCat .= "<li>";
  502. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  503. if (api_get_setting('show_number_of_courses') == 'true') {
  504. $htmlListCat .= " (".$catLine['nbCourse']." ".get_lang("Courses").")";
  505. }
  506. $htmlListCat .= "</li>\n";
  507. $thereIsSubCat = true;
  508. } elseif ($catLine['children_count'] > 0) {
  509. //the category has children, subcategories
  510. $htmlListCat .= "<li>";
  511. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  512. $htmlListCat .= "</li>\n";
  513. $thereIsSubCat = true;
  514. }
  515. /************************************************************************
  516. end changed code to eliminate the (0 courses) after empty categories
  517. ************************************************************************/
  518. elseif (api_get_setting('show_empty_course_categories') == 'true') {
  519. $htmlListCat .= "<li>";
  520. $htmlListCat .= $catLine['name'];
  521. $htmlListCat .= "</li>\n";
  522. $thereIsSubCat = true;
  523. }//else don't set thereIsSubCat to true to avoid printing things if not requested
  524. } else {
  525. $htmlTitre = "<p>";
  526. if (api_get_setting('show_back_link_on_top_of_tree') == 'true') {
  527. $htmlTitre .= "<a href=\"".api_get_self()."\">"."&lt;&lt; ".get_lang("BackToHomePage")."</a>";
  528. }
  529. if (!is_null($catLine['parent_id']) || (api_get_setting('show_back_link_on_top_of_tree') <> 'true' && !is_null($catLine['code']))) {
  530. $htmlTitre .= "<a href=\"".api_get_self()."?category=".$catLine['parent_id']."\">"."&lt;&lt; ".get_lang("Up")."</a>";
  531. }
  532. $htmlTitre .= "</p>\n";
  533. if ($category != "" && !is_null($catLine['code'])) {
  534. $htmlTitre .= "<h3>".$catLine['name']."</h3>\n";
  535. } else {
  536. $htmlTitre .= "<h3>".get_lang("Categories")."</h3>\n";
  537. }
  538. }
  539. }
  540. $htmlListCat .= "</ul>\n";
  541. }
  542. echo $htmlTitre;
  543. if ($thereIsSubCat) {
  544. echo $htmlListCat;
  545. }
  546. while ($categoryName = Database::fetch_array($resCats)) {
  547. echo "<h3>", $categoryName['name'], "</h3>\n";
  548. }
  549. $numrows = Database::num_rows($sql_result_courses);
  550. $courses_list_string = '';
  551. $courses_shown = 0;
  552. if ($numrows > 0) {
  553. if ($thereIsSubCat) {
  554. $courses_list_string .= "<hr size=\"1\" noshade=\"noshade\">\n";
  555. }
  556. $courses_list_string .= "<h4 style=\"margin-top: 0px;\">".get_lang("CourseList")."</h4>\n"."<ul>\n";
  557. if (api_get_user_id()) {
  558. $courses_of_user = get_courses_of_user(api_get_user_id());
  559. }
  560. foreach ($course_list AS $course) {
  561. // $setting_show_also_closed_courses
  562. if ($setting_show_also_closed_courses==false) {
  563. // if we do not show the closed courses
  564. // we only show the courses that are open to the world (to everybody)
  565. // and the courses that are open to the platform (if the current user is a registered user
  566. if( ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM) OR ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  567. $courses_shown++;
  568. $courses_list_string .= "<li>\n";
  569. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">".$course['title']."</a><br />";
  570. if (get_setting("display_coursecode_in_courselist") == "true") {
  571. $courses_list_string .= $course['visual_code'];
  572. }
  573. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  574. $courses_list_string .= " - ";
  575. }
  576. if (get_setting("display_teacher_in_courselist") == "true") {
  577. $courses_list_string .= $course['tutor_name'];
  578. }
  579. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  580. $courses_list_string .= ' - '.$course['course_language'];
  581. }
  582. $courses_list_string .= "</li>\n";
  583. }
  584. }
  585. // we DO show the closed courses.
  586. // the course is accessible if (link to the course homepage)
  587. // 1. the course is open to the world (doesn't matter if the user is logged in or not): $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)
  588. // 2. the user is logged in and the course is open to the world or open to the platform: ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  589. // 3. the user is logged in and the user is subscribed to the course and the course visibility is not COURSE_VISIBILITY_CLOSED
  590. // 4. the user is logged in and the user is course admin of te course (regardless of the course visibility setting)
  591. // 5. the user is the platform admin api_is_platform_admin()
  592. //
  593. else {
  594. $courses_shown++;
  595. $courses_list_string .= "<li>\n";
  596. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  597. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  598. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  599. OR $courses_of_user[$course['code']]['status'] == '1'
  600. OR api_is_platform_admin()) {
  601. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">";
  602. }
  603. $courses_list_string .= $course['title'];
  604. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  605. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  606. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  607. OR $courses_of_user[$course['code']]['status'] == '1'
  608. OR api_is_platform_admin()) {
  609. $courses_list_string .="</a><br />";
  610. }
  611. if (get_setting("display_coursecode_in_courselist") == "true") {
  612. $courses_list_string .= $course['visual_code'];
  613. }
  614. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  615. $courses_list_string .= " - ";
  616. }
  617. if (get_setting("display_teacher_in_courselist") == "true")
  618. {
  619. $courses_list_string .= $course['tutor_name'];
  620. }
  621. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  622. $courses_list_string .= ' - '.$course['course_language'];
  623. }
  624. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  625. $courses_list_string .= ' - '.$course['course_language'];
  626. }
  627. // We display a subscription link if
  628. // 1. it is allowed to register for the course and if the course is not already in the courselist of the user and if the user is identiefied
  629. // 2
  630. if ($user_identified AND !key_exists($course['code'],$courses_of_user)) {
  631. if ($course['subscribe'] == '1') {
  632. $courses_list_string .= "<form action=\"main/auth/courses.php?action=subscribe&category=".$_GET['category']."\" method=\"post\">";
  633. $courses_list_string .= '<input type="hidden" name="sec_token" value="'.$stok.'">';
  634. $courses_list_string .= "<input type=\"hidden\" name=\"subscribe\" value=\"".$course['code']."\" />";
  635. $courses_list_string .= "<input type=\"image\" name=\"unsub\" src=\"main/img/enroll.gif\" alt=\"".get_lang("Subscribe")."\" />".get_lang("Subscribe")."</form>";
  636. } else {
  637. $courses_list_string .= '<br />'.get_lang("SubscribingNotAllowed");
  638. }
  639. }
  640. $courses_list_string .= "</li>\n";
  641. }
  642. }
  643. $courses_list_string .= "</ul>\n";
  644. } else {
  645. // echo "<blockquote>",get_lang('_No_course_publicly_available'),"</blockquote>\n";
  646. }
  647. if ($courses_shown > 0) { //only display the list of courses and categories if there was more than
  648. // 0 courses visible to the world (we're in the anonymous list here)
  649. echo $courses_list_string;
  650. }
  651. if ($category != "") {
  652. echo "<p>", "<a href=\"".api_get_self()."\"><b>&lt;&lt;</b> ", get_lang("BackToHomePage"), "</a>", "</p>\n";
  653. }
  654. }
  655. /**
  656. * retrieves all the courses that the user has already subscribed to
  657. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Belgium
  658. * @param int $user_id: the id of the user
  659. * @return array an array containing all the information of the courses of the given user
  660. */
  661. function get_courses_of_user($user_id) {
  662. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  663. $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  664. // Secondly we select the courses that are in a category (user_course_cat<>0) and sort these according to the sort of the category
  665. $user_id = intval($user_id);
  666. $sql_select_courses="SELECT course.code k, course.visual_code vc, course.subscribe subscr, course.unsubscribe unsubscr,
  667. course.title i, course.tutor_name t, course.db_name db, course.directory dir, course_rel_user.status status,
  668. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat
  669. FROM $table_course course,
  670. $table_course_user course_rel_user
  671. WHERE course.code = course_rel_user.course_code
  672. AND course_rel_user.user_id = '".$user_id."'
  673. ORDER BY course_rel_user.sort ASC";
  674. $result = api_sql_query($sql_select_courses,__FILE__,__LINE__);
  675. while ($row=Database::fetch_array($result)) {
  676. // we only need the database name of the course
  677. $courses[$row['k']] = array("db"=> $row['db'], "code" => $row['k'], "visual_code" => $row['vc'], "title" => $row['i'], "directory" => $row['dir'], "status" => $row['status'], "tutor" => $row['t'], "subscribe" => $row['subscr'], "unsubscribe" => $row['unsubscr'], "sort" => $row['sort'], "user_course_category" => $row['user_course_cat']);
  678. }
  679. return $courses;
  680. }