index.php 33 KB

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  1. <?php // $Id: index.php 20569 2009-05-12 21:34:00Z aportugal $
  2. /*
  3. ==============================================================================
  4. Dokeos - elearning and course management software
  5. Copyright (c) 2004-2009 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 20569 2009-05-12 21:34:00Z aportugal $
  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. $home= 'home/';
  151. if ($_configuration['multiple_access_urls']==true) {
  152. $access_url_id = api_get_current_access_url_id();
  153. if ($access_url_id != -1){
  154. $url_info = api_get_access_url($access_url_id);
  155. // "http://" and the final "/" replaced
  156. $url = substr($url_info['url'],7,strlen($url_info['url'])-8);
  157. $clean_url = replace_dangerous_char($url);
  158. $clean_url = str_replace('/','-',$clean_url);
  159. $clean_url = $clean_url.'/';
  160. $home_old = 'home/';
  161. $home= 'home/'.$clean_url;
  162. }
  163. }
  164. // Including the page for the news
  165. $page_included = false;
  166. if (!empty ($_GET['include']) && preg_match('/^[a-zA-Z0-9_-]*\.html$/',$_GET['include'])) {
  167. include ('./'.$home.$_GET['include']);
  168. $page_included = true;
  169. } else {
  170. if (!empty($_SESSION['user_language_choice'])) {
  171. $user_selected_language=$_SESSION['user_language_choice'];
  172. } elseif(!empty($_SESSION['_user']['language'])) {
  173. $user_selected_language=$_SESSION['_user']['language'];
  174. } else {
  175. $user_selected_language=get_setting('platformLanguage');
  176. }
  177. if(!file_exists($home.'home_news_'.$user_selected_language.'.html')) {
  178. if (file_exists($home.'home_top.html'))
  179. $home_top_temp=file($home.'home_top.html');
  180. else {
  181. $home_top_temp=file($home_old.'home_top.html');
  182. }
  183. $home_top_temp=implode('',$home_top_temp);
  184. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  185. echo $open;
  186. } else {
  187. if(file_exists($home.'home_top_'.$user_selected_language.'.html')) {
  188. $home_top_temp = file_get_contents($home.'home_top_'.$user_selected_language.'.html');
  189. } else {
  190. $home_top_temp = file_get_contents($home.'home_top.html');
  191. }
  192. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  193. echo $open;
  194. }
  195. }
  196. // Display System announcements
  197. $announcement = isset($_GET['announcement']) ? $_GET['announcement'] : -1;
  198. $announcement = intval($announcement);
  199. if (isset($_user['user_id'])) {
  200. $visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
  201. SystemAnnouncementManager :: display_announcements($visibility, $announcement);
  202. } else {
  203. SystemAnnouncementManager :: display_announcements(VISIBLE_GUEST, $announcement);
  204. }
  205. // Display courses and category list
  206. if (!$page_included) {
  207. if (api_get_setting('display_categories_on_homepage') == 'true') {
  208. echo '<div class="home_cats">';
  209. display_anonymous_course_list();
  210. echo '</div>';
  211. }
  212. }
  213. echo '</div>';
  214. // display right menu: language form, login section + useful weblinks
  215. echo '<div class="menu" id="menu">';
  216. display_anonymous_right_menu();
  217. echo '</div>';
  218. /*
  219. ==============================================================================
  220. FOOTER
  221. ==============================================================================
  222. */
  223. Display :: display_footer();
  224. /**
  225. * This function handles the logout and is called whenever there is a $_GET['logout']
  226. *
  227. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  228. */
  229. function logout()
  230. {
  231. global $_configuration, $extAuthSource;
  232. // variable initialisation
  233. $query_string='';
  234. if (!empty($_SESSION['user_language_choice'])) {
  235. $query_string='?language='.$_SESSION['user_language_choice'];
  236. }
  237. // Database table definition
  238. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  239. // selecting the last login of the user
  240. $uid = intval($_GET['uid']);
  241. $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";
  242. $q_last_connection=api_sql_query($sql_last_connection);
  243. if (Database::num_rows($q_last_connection)>0) {
  244. $i_id_last_connection=Database::result($q_last_connection,0,"login_id");
  245. }
  246. if (!isset($_SESSION['login_as'])) {
  247. $current_date=date('Y-m-d H:i:s',time());
  248. $s_sql_update_logout_date="UPDATE $tbl_track_login SET logout_date='".$current_date."' WHERE login_id='$i_id_last_connection'";
  249. api_sql_query($s_sql_update_logout_date);
  250. }
  251. LoginDelete($uid, $_configuration['statistics_database']); //from inc/lib/online.inc.php - removes the "online" status
  252. //the following code enables the use of an external logout function.
  253. //example: define a $extAuthSource['ldap']['logout']="file.php" in configuration.php
  254. // then a function called ldap_logout() inside that file
  255. // (using *authent_name*_logout as the function name) and the following code
  256. // will find and execute it
  257. $uinfo = api_get_user_info($uid);
  258. if (($uinfo['auth_source'] != PLATFORM_AUTH_SOURCE) && is_array($extAuthSource)) {
  259. if (is_array($extAuthSource[$uinfo['auth_source']])) {
  260. $subarray = $extAuthSource[$uinfo['auth_source']];
  261. if (!empty($subarray['logout']) && file_exists($subarray['logout'])) {
  262. include_once($subarray['logout']);
  263. $logout_function = $uinfo['auth_source'].'_logout';
  264. if (function_exists($logout_function)) {
  265. $logout_function($uinfo);
  266. }
  267. }
  268. }
  269. }
  270. exit_of_chat($uid);
  271. api_session_destroy();
  272. header("Location: index.php$query_string");
  273. exit();
  274. }
  275. /**
  276. * This function checks if there are courses that are open to the world in the platform course categories (=faculties)
  277. *
  278. * @param unknown_type $category
  279. * @return boolean
  280. */
  281. function category_has_open_courses($category) {
  282. global $setting_show_also_closed_courses;
  283. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  284. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  285. $sql_query = "SELECT * FROM $main_course_table WHERE category_code='$category'";
  286. $sql_result = api_sql_query($sql_query, __FILE__, __LINE__);
  287. while ($course = Database::fetch_array($sql_result)) {
  288. if ($setting_show_also_closed_courses == false) {
  289. if ((api_get_user_id()>0
  290. and $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  291. or ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  292. return true; //at least one open course
  293. }
  294. } else {
  295. if(isset($course['visibility'])){
  296. return true; //at least one course (does not matter weither it's open or not because $setting_show_also_closed_courses = true
  297. }
  298. }
  299. }
  300. return false;
  301. }
  302. function display_create_course_link() {
  303. echo "<li><a href=\"main/create_course/add_course.php\">".get_lang("CourseCreate")."</a></li>";
  304. }
  305. function display_edit_course_list_links() {
  306. echo "<li><a href=\"main/auth/courses.php\">".get_lang("CourseManagement")."</a></li>";
  307. }
  308. /**
  309. * Displays the right-hand menu for anonymous users:
  310. * login form, useful links, help section
  311. * Warning: function defines globals
  312. * @version 1.0.1
  313. * @todo does $_plugins need to be global?
  314. */
  315. function display_anonymous_right_menu() {
  316. global $loginFailed, $_plugins, $_user, $menu_navigation;
  317. $platformLanguage = api_get_setting('platformLanguage');
  318. if ( !($_user['user_id']) or api_is_anonymous($_user['user_id']) ) { // only display if the user isn't logged in
  319. api_display_language_form(true);
  320. echo '<br />';
  321. display_login_form();
  322. if ($loginFailed) {
  323. echo '<br />';
  324. handle_login_failed();
  325. }
  326. if (api_get_setting('allow_lostpassword') == 'true' OR api_get_setting('allow_registration') == 'true') {
  327. echo '<div class="menusection"><span class="menusectioncaption">'.get_lang('MenuUser').'</span><ul class="menulist">';
  328. if (get_setting('allow_registration') <> 'false') {
  329. echo '<li><a href="main/auth/inscription.php">'.get_lang('Reg').'</a></li>';
  330. }
  331. if (get_setting('allow_lostpassword') == 'true') {
  332. display_lost_password_info();
  333. }
  334. echo '</ul></div>';
  335. }
  336. if (api_number_of_plugins('loginpage_menu') > 0) {
  337. echo '<div class="note" style="background: none">';
  338. api_plugin('loginpage_menu');
  339. echo '</div>';
  340. }
  341. }
  342. // My Account section
  343. if (isset($_SESSION['_user']['user_id']) && $_SESSION['_user']['user_id']!=0) {
  344. // tabs that are deactivated are added here
  345. $show_menu=false;
  346. $show_create_link=false;
  347. $show_course_link=false;
  348. $display_add_course_link = api_is_allowed_to_create_course() && ($_SESSION["studentview"] != "studentenview");
  349. if ($display_add_course_link) {
  350. //display_create_course_link();
  351. $show_menu=true;
  352. $show_create_link=true;
  353. }
  354. if (api_is_platform_admin() || api_is_course_admin() || api_is_allowed_to_create_course()) {
  355. $show_menu=true;
  356. $show_course_link=true;
  357. } else {
  358. if (api_get_setting('allow_students_to_browse_courses')=='true') {
  359. $show_menu=true;
  360. $show_course_link=true;
  361. }
  362. }
  363. if ($show_menu){
  364. echo "<div class=\"menusection\">";
  365. echo "<span class=\"menusectioncaption\">".get_lang("MenuUser")."</span>";
  366. echo "<ul class=\"menulist\">";
  367. if ($show_create_link)
  368. display_create_course_link();
  369. if ($show_course_link)
  370. display_edit_course_list_links();
  371. echo "</ul>";
  372. echo "</div>";
  373. }
  374. if (!empty($menu_navigation)) {
  375. echo "<div class=\"menusection\">";
  376. echo "<span class=\"menusectioncaption\">".get_lang("MainNavigation")."</span>";
  377. echo "<ul class=\"menulist\">";
  378. foreach($menu_navigation as $section => $navigation_info) {
  379. $current = ($section == $GLOBALS['this_section'] ? ' id="current"' : '');
  380. echo '<li'.$current.'>';
  381. echo '<a href="'.$navigation_info['url'].'" target="_top">'.$navigation_info['title'].'</a>';
  382. echo '</li>';
  383. echo "\n";
  384. }
  385. echo "</ul>";
  386. echo '</div>';
  387. }
  388. }
  389. // help ection
  390. /*** hide right menu "general" and other parts on anonymous right menu *****/
  391. /** General -> Forum. Should disappear (not relevant for end user)
  392. echo "<div class=\"menusection\">", "<span class=\"menusectioncaption\">".get_lang("MenuGeneral")."</span>";
  393. echo "<ul class=\"menulist\">";
  394. $user_selected_language = api_get_interface_language();
  395. global $home, $home_old;
  396. if (!isset ($user_selected_language))
  397. $user_selected_language = $platformLanguage;
  398. if (!file_exists($home.'home_menu_'.$user_selected_language.'.html')) {
  399. if (file_exists($home.'home_menu.html'))
  400. include ($home.'home_menu.html');
  401. else {
  402. include ($home_old.'home_menu.html');
  403. }
  404. } else {
  405. include($home.'home_menu_'.$user_selected_language.'.html');
  406. }
  407. echo '</ul>';
  408. echo '</div>';
  409. **/
  410. if ($_user['user_id'] && api_number_of_plugins('campushomepage_menu') > 0) {
  411. echo '<div class="note" style="background: none">';
  412. api_plugin('campushomepage_menu');
  413. echo '</div>';
  414. }
  415. // includes for any files to be displayed below anonymous right menu
  416. if (!file_exists($home.'home_notice_'.$user_selected_language.'.html') && file_exists($home.'home_notice.html') && file_get_contents($home.'home_notice.html')!='') {
  417. echo '<div class="note">';
  418. if (file_exists($home.'home_notice.html'))
  419. include ($home.'home_notice.html');
  420. else {
  421. include ($home_old.'home_notice.html');
  422. }
  423. echo '</div>';
  424. } elseif(file_exists($home.'home_notice_'.$user_selected_language.'.html') && file_exists($home.'home_notice_'.$user_selected_language.'.html') && file_get_contents($home.'home_notice_'.$user_selected_language.'.html')!='') {
  425. echo '<div class="note">';
  426. include($home.'home_notice_'.$user_selected_language.'.html');
  427. echo '</div>';
  428. }
  429. }
  430. /**
  431. * Reacts on a failed login:
  432. * displays an explanation with
  433. * a link to the registration form.
  434. *
  435. * @version 1.0.1
  436. */
  437. function handle_login_failed() {
  438. if (!isset($_GET['error'])) {
  439. $message = get_lang("InvalidId");
  440. if (api_is_self_registration_allowed()) {
  441. $message = get_lang("InvalidForSelfRegistration");
  442. }
  443. } else {
  444. switch ($_GET['error']) {
  445. case '':
  446. $message = get_lang('InvalidId');
  447. if (api_is_self_registration_allowed()) {
  448. $message = get_lang('InvalidForSelfRegistration');
  449. }
  450. break;
  451. case 'account_expired':
  452. $message=get_lang('AccountExpired');
  453. break;
  454. case 'account_inactive':
  455. $message=get_lang('AccountInactive');
  456. break;
  457. case 'user_password_incorrect':
  458. $message=get_lang('InvalidId');
  459. break;
  460. case 'access_url_inactive':
  461. $message=get_lang('AccountURLInactive');
  462. break;
  463. }
  464. }
  465. echo "<div id=\"login_fail\">".$message."</div>";
  466. }
  467. /**
  468. * Adds a form to let users login
  469. * @version 1.1
  470. */
  471. function display_login_form()
  472. {
  473. $form = new FormValidator('formLogin');
  474. $form->addElement('text','login',get_lang('UserName'),array('size'=>17));
  475. $form->addElement('password','password',get_lang('Pass'),array('size'=>17));
  476. $form->addElement('style_submit_button','submitAuth',get_lang('langEnter'), array('class'=>'login', 'style'=>'float:left'));
  477. $renderer =& $form->defaultRenderer();
  478. $renderer->setElementTemplate('<div><label>{label}</label></div><div>{element}</div>');
  479. $form->display();
  480. if (api_get_setting('openid_authentication')=='true') {
  481. include_once('main/auth/openid/login.php');
  482. echo '<div>'.openid_form().'</div>';
  483. }
  484. }
  485. /**
  486. * Displays a link to the lost password section
  487. */
  488. function display_lost_password_info() {
  489. echo "<li><a href=\"main/auth/lostPassword.php\">".get_lang("LostPassword")."</a></li>";
  490. }
  491. /**
  492. * Display list of courses in a category.
  493. * (for anonymous users)
  494. *
  495. * @version 1.1
  496. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University - refactoring and code cleaning
  497. */
  498. function display_anonymous_course_list() {
  499. $ctok = $_SESSION['sec_token'];
  500. $stok = Security::get_token();
  501. //init
  502. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  503. $web_course_path = api_get_path(WEB_COURSE_PATH);
  504. $category = Database::escape_string($_GET['category']);
  505. global $setting_show_also_closed_courses;
  506. // Database table definitions
  507. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  508. $main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
  509. $platformLanguage = api_get_setting('platformLanguage');
  510. //get list of courses in category $category
  511. $sql_get_course_list = "SELECT * FROM $main_course_table cours
  512. WHERE category_code = '".Database::escape_string($_GET["category"])."'
  513. ORDER BY title, UPPER(visual_code)";
  514. //showing only the courses of the current access_url_id
  515. global $_configuration;
  516. if ($_configuration['multiple_access_urls']==true) {
  517. $url_access_id = api_get_current_access_url_id();
  518. if ($url_access_id !=-1) {
  519. $tbl_url_rel_course = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  520. $sql_get_course_list="SELECT * FROM $main_course_table as course INNER JOIN $tbl_url_rel_course as url_rel_course
  521. ON (url_rel_course.course_code=course.code)
  522. WHERE access_url_id = $url_access_id AND category_code = '".Database::escape_string($_GET["category"])."' ORDER BY title, UPPER(visual_code)";
  523. }
  524. }
  525. //removed: AND cours.visibility='".COURSE_VISIBILITY_OPEN_WORLD."'
  526. $sql_result_courses = api_sql_query($sql_get_course_list, __FILE__, __LINE__);
  527. while ($course_result = Database::fetch_array($sql_result_courses)) {
  528. $course_list[] = $course_result;
  529. }
  530. $platform_visible_courses = '';
  531. // $setting_show_also_closed_courses
  532. if($user_identified) {
  533. if ($setting_show_also_closed_courses) {
  534. $platform_visible_courses = '';
  535. } else {
  536. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' OR t3.visibility='".COURSE_VISIBILITY_OPEN_PLATFORM."' )";
  537. }
  538. } else {
  539. if ($setting_show_also_closed_courses) {
  540. $platform_visible_courses = '';
  541. } else {
  542. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' )";
  543. }
  544. }
  545. $sqlGetSubCatList = "
  546. SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
  547. FROM $main_category_table t1
  548. LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
  549. LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
  550. WHERE t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
  551. GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
  552. //showing only the category of courses of the current access_url_id
  553. global $_configuration;
  554. if ($_configuration['multiple_access_urls']==true) {
  555. $url_access_id = api_get_current_access_url_id();
  556. if ($url_access_id !=-1) {
  557. $tbl_url_rel_course = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  558. $sqlGetSubCatList = "
  559. SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
  560. FROM $main_category_table t1
  561. LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
  562. LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
  563. INNER JOIN $tbl_url_rel_course as url_rel_course
  564. ON (url_rel_course.course_code=t3.code)
  565. WHERE access_url_id = $url_access_id AND t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
  566. GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
  567. }
  568. }
  569. $resCats = api_sql_query($sqlGetSubCatList, __FILE__, __LINE__);
  570. $thereIsSubCat = false;
  571. if (Database::num_rows($resCats) > 0) {
  572. $htmlListCat = "<h4 style=\"margin-top: 0px;\">".get_lang("CatList")."</h4>"."<ul>";
  573. while ($catLine = Database::fetch_array($resCats)) {
  574. if ($catLine['code'] != $category) {
  575. $category_has_open_courses = category_has_open_courses($catLine['code']);
  576. if ($category_has_open_courses) {
  577. //the category contains courses accessible to anonymous visitors
  578. $htmlListCat .= "<li>";
  579. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  580. if (api_get_setting('show_number_of_courses') == 'true') {
  581. $htmlListCat .= " (".$catLine['nbCourse']." ".get_lang("Courses").")";
  582. }
  583. $htmlListCat .= "</li>\n";
  584. $thereIsSubCat = true;
  585. } elseif ($catLine['children_count'] > 0) {
  586. //the category has children, subcategories
  587. $htmlListCat .= "<li>";
  588. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  589. $htmlListCat .= "</li>\n";
  590. $thereIsSubCat = true;
  591. }
  592. /************************************************************************
  593. end changed code to eliminate the (0 courses) after empty categories
  594. ************************************************************************/
  595. elseif (api_get_setting('show_empty_course_categories') == 'true') {
  596. $htmlListCat .= "<li>";
  597. $htmlListCat .= $catLine['name'];
  598. $htmlListCat .= "</li>\n";
  599. $thereIsSubCat = true;
  600. }//else don't set thereIsSubCat to true to avoid printing things if not requested
  601. } else {
  602. $htmlTitre = "<p>";
  603. if (api_get_setting('show_back_link_on_top_of_tree') == 'true') {
  604. $htmlTitre .= "<a href=\"".api_get_self()."\">"."&lt;&lt; ".get_lang("BackToHomePage")."</a>";
  605. }
  606. if (!is_null($catLine['parent_id']) || (api_get_setting('show_back_link_on_top_of_tree') <> 'true' && !is_null($catLine['code']))) {
  607. $htmlTitre .= "<a href=\"".api_get_self()."?category=".$catLine['parent_id']."\">"."&lt;&lt; ".get_lang("Up")."</a>";
  608. }
  609. $htmlTitre .= "</p>\n";
  610. if ($category != "" && !is_null($catLine['code'])) {
  611. $htmlTitre .= "<h3>".$catLine['name']."</h3>\n";
  612. } else {
  613. $htmlTitre .= "<h3>".get_lang("Categories")."</h3>\n";
  614. }
  615. }
  616. }
  617. $htmlListCat .= "</ul>\n";
  618. }
  619. echo $htmlTitre;
  620. if ($thereIsSubCat) {
  621. echo $htmlListCat;
  622. }
  623. while ($categoryName = Database::fetch_array($resCats)) {
  624. echo "<h3>", $categoryName['name'], "</h3>\n";
  625. }
  626. $numrows = Database::num_rows($sql_result_courses);
  627. $courses_list_string = '';
  628. $courses_shown = 0;
  629. if ($numrows > 0) {
  630. if ($thereIsSubCat) {
  631. $courses_list_string .= "<hr size=\"1\" noshade=\"noshade\">\n";
  632. }
  633. $courses_list_string .= "<h4 style=\"margin-top: 0px;\">".get_lang("CourseList")."</h4>\n"."<ul>\n";
  634. if (api_get_user_id()) {
  635. $courses_of_user = get_courses_of_user(api_get_user_id());
  636. }
  637. foreach ($course_list AS $course) {
  638. // $setting_show_also_closed_courses
  639. if ($setting_show_also_closed_courses==false) {
  640. // if we do not show the closed courses
  641. // we only show the courses that are open to the world (to everybody)
  642. // and the courses that are open to the platform (if the current user is a registered user
  643. if( ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM) OR ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  644. $courses_shown++;
  645. $courses_list_string .= "<li>\n";
  646. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">".$course['title']."</a><br />";
  647. if (get_setting("display_coursecode_in_courselist") == "true") {
  648. $courses_list_string .= $course['visual_code'];
  649. }
  650. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  651. $courses_list_string .= " - ";
  652. }
  653. if (get_setting("display_teacher_in_courselist") == "true") {
  654. $courses_list_string .= $course['tutor_name'];
  655. }
  656. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  657. $courses_list_string .= ' - '.$course['course_language'];
  658. }
  659. $courses_list_string .= "</li>\n";
  660. }
  661. }
  662. // we DO show the closed courses.
  663. // the course is accessible if (link to the course homepage)
  664. // 1. the course is open to the world (doesn't matter if the user is logged in or not): $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)
  665. // 2. the user is logged in and the course is open to the world or open to the platform: ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  666. // 3. the user is logged in and the user is subscribed to the course and the course visibility is not COURSE_VISIBILITY_CLOSED
  667. // 4. the user is logged in and the user is course admin of te course (regardless of the course visibility setting)
  668. // 5. the user is the platform admin api_is_platform_admin()
  669. //
  670. else {
  671. $courses_shown++;
  672. $courses_list_string .= "<li>\n";
  673. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  674. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  675. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  676. OR $courses_of_user[$course['code']]['status'] == '1'
  677. OR api_is_platform_admin()) {
  678. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">";
  679. }
  680. $courses_list_string .= $course['title'];
  681. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  682. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  683. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  684. OR $courses_of_user[$course['code']]['status'] == '1'
  685. OR api_is_platform_admin()) {
  686. $courses_list_string .="</a><br />";
  687. }
  688. if (get_setting("display_coursecode_in_courselist") == "true") {
  689. $courses_list_string .= $course['visual_code'];
  690. }
  691. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  692. $courses_list_string .= " - ";
  693. }
  694. if (get_setting("display_teacher_in_courselist") == "true")
  695. {
  696. $courses_list_string .= $course['tutor_name'];
  697. }
  698. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  699. $courses_list_string .= ' - '.$course['course_language'];
  700. }
  701. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  702. $courses_list_string .= ' - '.$course['course_language'];
  703. }
  704. // We display a subscription link if
  705. // 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
  706. // 2
  707. if ($user_identified AND !key_exists($course['code'],$courses_of_user)) {
  708. if ($course['subscribe'] == '1') {
  709. $courses_list_string .= "<form action=\"main/auth/courses.php?action=subscribe&category=".$_GET['category']."\" method=\"post\">";
  710. $courses_list_string .= '<input type="hidden" name="sec_token" value="'.$stok.'">';
  711. $courses_list_string .= "<input type=\"hidden\" name=\"subscribe\" value=\"".$course['code']."\" />";
  712. $courses_list_string .= "<input type=\"image\" name=\"unsub\" src=\"main/img/enroll.gif\" alt=\"".get_lang("Subscribe")."\" />".get_lang("Subscribe")."</form>";
  713. } else {
  714. $courses_list_string .= '<br />'.get_lang("SubscribingNotAllowed");
  715. }
  716. }
  717. $courses_list_string .= "</li>\n";
  718. }
  719. }
  720. $courses_list_string .= "</ul>\n";
  721. } else {
  722. // echo "<blockquote>",get_lang('_No_course_publicly_available'),"</blockquote>\n";
  723. }
  724. if ($courses_shown > 0) { //only display the list of courses and categories if there was more than
  725. // 0 courses visible to the world (we're in the anonymous list here)
  726. echo $courses_list_string;
  727. }
  728. if ($category != "") {
  729. echo "<p>", "<a href=\"".api_get_self()."\"><b>&lt;&lt;</b> ", get_lang("BackToHomePage"), "</a>", "</p>\n";
  730. }
  731. }
  732. /**
  733. * retrieves all the courses that the user has already subscribed to
  734. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Belgium
  735. * @param int $user_id: the id of the user
  736. * @return array an array containing all the information of the courses of the given user
  737. */
  738. function get_courses_of_user($user_id) {
  739. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  740. $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  741. // Secondly we select the courses that are in a category (user_course_cat<>0) and sort these according to the sort of the category
  742. $user_id = intval($user_id);
  743. $sql_select_courses="SELECT course.code k, course.visual_code vc, course.subscribe subscr, course.unsubscribe unsubscr,
  744. course.title i, course.tutor_name t, course.db_name db, course.directory dir, course_rel_user.status status,
  745. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat
  746. FROM $table_course course,
  747. $table_course_user course_rel_user
  748. WHERE course.code = course_rel_user.course_code
  749. AND course_rel_user.user_id = '".$user_id."'
  750. ORDER BY course_rel_user.sort ASC";
  751. $result = api_sql_query($sql_select_courses,__FILE__,__LINE__);
  752. while ($row=Database::fetch_array($result)) {
  753. // we only need the database name of the course
  754. $courses[$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']);
  755. }
  756. return $courses;
  757. }