index.php 34 KB

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  1. <?php // $Id: index.php 22368 2009-07-24 23:25:57Z iflorespaz $
  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 22368 2009-07-24 23:25:57Z 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']) && $_GET['submitAuth'] == 1) {
  98. // nice lie!!!
  99. echo 'Attempted breakin - sysadmins notified.';
  100. session_destroy();
  101. die();
  102. }
  103. //Delete session neccesary for legal terms
  104. if (get_setting('allow_terms_conditions')=='true') {
  105. unset($_SESSION['update_term_and_condition']);
  106. unset($_SESSION['info_current_user']);
  107. }
  108. /**
  109. * @todo This piece of code should probably move to local.inc.php where the actual login procedure is handled.
  110. * @todo check if this code is used. I think this code is never executed because after clicking the submit button
  111. * the code does the stuff in local.inc.php and then redirects to index.php or user_portal.php depending
  112. * on api_get_setting('page_after_login')
  113. */
  114. if (!empty($_POST["submitAuth"])) {
  115. // the user is already authenticated, we now find the last login of the user.
  116. if (isset ($_user['user_id'])) {
  117. $sql_last_login = "SELECT UNIX_TIMESTAMP(login_date)
  118. FROM $track_login_table
  119. WHERE login_user_id = '".$_user['user_id']."'
  120. ORDER BY login_date DESC LIMIT 1";
  121. $result_last_login = api_sql_query($sql_last_login, __FILE__, __LINE__);
  122. if (!$result_last_login)
  123. if (Database::num_rows($result_last_login) > 0) {
  124. $user_last_login_datetime = Database::fetch_array($result_last_login);
  125. $user_last_login_datetime = $user_last_login_datetime[0];
  126. api_session_register('user_last_login_datetime');
  127. }
  128. mysql_free_result($result_last_login);
  129. //event_login();
  130. if (api_is_platform_admin()) {
  131. // decode all open event informations and fill the track_c_* tables
  132. include (api_get_path(LIBRARY_PATH)."stats.lib.inc.php");
  133. decodeOpenInfos();
  134. }
  135. }
  136. } // end login -- if($_POST["submitAuth"])
  137. else {
  138. // only if login form was not sent because if the form is sent the user was already on the page.
  139. event_open();
  140. }
  141. // the header
  142. Display :: display_header('', 'dokeos');
  143. /*
  144. ==============================================================================
  145. MAIN CODE
  146. ==============================================================================
  147. */
  148. echo '<div class="maincontent" id="content">';
  149. // Plugins for loginpage_main AND campushomepage_main
  150. if (!api_get_user_id()) {
  151. api_plugin('loginpage_main');
  152. } else {
  153. api_plugin('campushomepage_main');
  154. }
  155. $home= 'home/';
  156. if ($_configuration['multiple_access_urls']==true) {
  157. $access_url_id = api_get_current_access_url_id();
  158. if ($access_url_id != -1){
  159. $url_info = api_get_access_url($access_url_id);
  160. // "http://" and the final "/" replaced
  161. $url = substr($url_info['url'],7,strlen($url_info['url'])-8);
  162. $clean_url = replace_dangerous_char($url);
  163. $clean_url = str_replace('/','-',$clean_url);
  164. $clean_url = $clean_url.'/';
  165. $home_old = 'home/';
  166. $home= 'home/'.$clean_url;
  167. }
  168. }
  169. // Including the page for the news
  170. $page_included = false;
  171. if (!empty ($_GET['include']) && preg_match('/^[a-zA-Z0-9_-]*\.html$/',$_GET['include'])) {
  172. include ('./'.$home.$_GET['include']);
  173. $page_included = true;
  174. } else {
  175. if (!empty($_SESSION['user_language_choice'])) {
  176. $user_selected_language=$_SESSION['user_language_choice'];
  177. } elseif(!empty($_SESSION['_user']['language'])) {
  178. $user_selected_language=$_SESSION['_user']['language'];
  179. } else {
  180. $user_selected_language=get_setting('platformLanguage');
  181. }
  182. if(!file_exists($home.'home_news_'.$user_selected_language.'.html')) {
  183. if (file_exists($home.'home_top.html'))
  184. $home_top_temp=file($home.'home_top.html');
  185. else {
  186. $home_top_temp=file($home_old.'home_top.html');
  187. }
  188. $home_top_temp=implode('',$home_top_temp);
  189. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  190. echo $open;
  191. } else {
  192. if(file_exists($home.'home_top_'.$user_selected_language.'.html')) {
  193. $home_top_temp = file_get_contents($home.'home_top_'.$user_selected_language.'.html');
  194. } else {
  195. $home_top_temp = file_get_contents($home.'home_top.html');
  196. }
  197. $open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
  198. echo $open;
  199. }
  200. }
  201. // Display System announcements
  202. $announcement = isset($_GET['announcement']) ? $_GET['announcement'] : -1;
  203. $announcement = intval($announcement);
  204. if (isset($_user['user_id'])) {
  205. $visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
  206. SystemAnnouncementManager :: display_announcements($visibility, $announcement);
  207. } else {
  208. SystemAnnouncementManager :: display_announcements(VISIBLE_GUEST, $announcement);
  209. }
  210. // Display courses and category list
  211. if (!$page_included) {
  212. if (api_get_setting('display_categories_on_homepage') == 'true') {
  213. echo '<div class="home_cats">';
  214. display_anonymous_course_list();
  215. echo '</div>';
  216. }
  217. }
  218. echo '</div>';
  219. // display right menu: language form, login section + useful weblinks
  220. echo '<div class="menu" id="menu">';
  221. display_anonymous_right_menu();
  222. echo '</div>';
  223. /*
  224. ==============================================================================
  225. FOOTER
  226. ==============================================================================
  227. */
  228. Display :: display_footer();
  229. /**
  230. * This function handles the logout and is called whenever there is a $_GET['logout']
  231. *
  232. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  233. */
  234. function logout()
  235. {
  236. global $_configuration, $extAuthSource;
  237. // variable initialisation
  238. $query_string='';
  239. if (!empty($_SESSION['user_language_choice'])) {
  240. $query_string='?language='.$_SESSION['user_language_choice'];
  241. }
  242. // Database table definition
  243. $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
  244. // selecting the last login of the user
  245. $uid = intval($_GET['uid']);
  246. $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";
  247. $q_last_connection=api_sql_query($sql_last_connection);
  248. if (Database::num_rows($q_last_connection)>0) {
  249. $i_id_last_connection=Database::result($q_last_connection,0,"login_id");
  250. }
  251. if (!isset($_SESSION['login_as'])) {
  252. $current_date=date('Y-m-d H:i:s',time());
  253. $s_sql_update_logout_date="UPDATE $tbl_track_login SET logout_date='".$current_date."' WHERE login_id='$i_id_last_connection'";
  254. api_sql_query($s_sql_update_logout_date);
  255. }
  256. LoginDelete($uid, $_configuration['statistics_database']); //from inc/lib/online.inc.php - removes the "online" status
  257. //the following code enables the use of an external logout function.
  258. //example: define a $extAuthSource['ldap']['logout']="file.php" in configuration.php
  259. // then a function called ldap_logout() inside that file
  260. // (using *authent_name*_logout as the function name) and the following code
  261. // will find and execute it
  262. $uinfo = api_get_user_info($uid);
  263. if (($uinfo['auth_source'] != PLATFORM_AUTH_SOURCE) && is_array($extAuthSource)) {
  264. if (is_array($extAuthSource[$uinfo['auth_source']])) {
  265. $subarray = $extAuthSource[$uinfo['auth_source']];
  266. if (!empty($subarray['logout']) && file_exists($subarray['logout'])) {
  267. include_once($subarray['logout']);
  268. $logout_function = $uinfo['auth_source'].'_logout';
  269. if (function_exists($logout_function)) {
  270. $logout_function($uinfo);
  271. }
  272. }
  273. }
  274. }
  275. exit_of_chat($uid);
  276. api_session_destroy();
  277. header("Location: index.php$query_string");
  278. exit();
  279. }
  280. /**
  281. * This function checks if there are courses that are open to the world in the platform course categories (=faculties)
  282. *
  283. * @param unknown_type $category
  284. * @return boolean
  285. */
  286. function category_has_open_courses($category) {
  287. global $setting_show_also_closed_courses;
  288. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  289. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  290. $sql_query = "SELECT * FROM $main_course_table WHERE category_code='$category'";
  291. $sql_result = api_sql_query($sql_query, __FILE__, __LINE__);
  292. while ($course = Database::fetch_array($sql_result)) {
  293. if ($setting_show_also_closed_courses == false) {
  294. if ((api_get_user_id()>0
  295. and $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  296. or ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  297. return true; //at least one open course
  298. }
  299. } else {
  300. if(isset($course['visibility'])){
  301. return true; //at least one course (does not matter weither it's open or not because $setting_show_also_closed_courses = true
  302. }
  303. }
  304. }
  305. return false;
  306. }
  307. function display_create_course_link() {
  308. echo "<li><a href=\"main/create_course/add_course.php\">".get_lang("CourseCreate")."</a></li>";
  309. }
  310. function display_edit_course_list_links() {
  311. echo "<li><a href=\"main/auth/courses.php\">".get_lang("CourseManagement")."</a></li>";
  312. }
  313. /**
  314. * Displays the right-hand menu for anonymous users:
  315. * login form, useful links, help section
  316. * Warning: function defines globals
  317. * @version 1.0.1
  318. * @todo does $_plugins need to be global?
  319. */
  320. function display_anonymous_right_menu() {
  321. global $loginFailed, $_plugins, $_user, $menu_navigation;
  322. $platformLanguage = api_get_setting('platformLanguage');
  323. if ( !($_user['user_id']) or api_is_anonymous($_user['user_id']) ) { // only display if the user isn't logged in
  324. api_display_language_form(true);
  325. echo '<br />';
  326. display_login_form();
  327. if ($loginFailed) {
  328. echo '<br />';
  329. handle_login_failed();
  330. }
  331. if (api_get_setting('allow_lostpassword') == 'true' OR api_get_setting('allow_registration') == 'true') {
  332. echo '<div class="menusection"><span class="menusectioncaption">'.get_lang('MenuUser').'</span><ul class="menulist">';
  333. if (get_setting('allow_registration') <> 'false') {
  334. echo '<li><a href="main/auth/inscription.php">'.get_lang('Reg').'</a></li>';
  335. }
  336. if (get_setting('allow_lostpassword') == 'true') {
  337. display_lost_password_info();
  338. }
  339. echo '</ul></div>';
  340. }
  341. if (api_number_of_plugins('loginpage_menu') > 0) {
  342. echo '<div class="note" style="background: none">';
  343. api_plugin('loginpage_menu');
  344. echo '</div>';
  345. }
  346. }
  347. // My Account section
  348. if (isset($_SESSION['_user']['user_id']) && $_SESSION['_user']['user_id']!=0) {
  349. // tabs that are deactivated are added here
  350. $show_menu=false;
  351. $show_create_link=false;
  352. $show_course_link=false;
  353. $display_add_course_link = api_is_allowed_to_create_course() && ($_SESSION["studentview"] != "studentenview");
  354. if ($display_add_course_link) {
  355. //display_create_course_link();
  356. $show_menu=true;
  357. $show_create_link=true;
  358. }
  359. if (api_is_platform_admin() || api_is_course_admin() || api_is_allowed_to_create_course()) {
  360. $show_menu=true;
  361. $show_course_link=true;
  362. } else {
  363. if (api_get_setting('allow_students_to_browse_courses')=='true') {
  364. $show_menu=true;
  365. $show_course_link=true;
  366. }
  367. }
  368. if ($show_menu){
  369. echo "<div class=\"menusection\">";
  370. echo "<span class=\"menusectioncaption\">".get_lang("MenuUser")."</span>";
  371. echo "<ul class=\"menulist\">";
  372. if ($show_create_link)
  373. display_create_course_link();
  374. if ($show_course_link)
  375. display_edit_course_list_links();
  376. echo "</ul>";
  377. echo "</div>";
  378. }
  379. if (!empty($menu_navigation)) {
  380. echo "<div class=\"menusection\">";
  381. echo "<span class=\"menusectioncaption\">".get_lang("MainNavigation")."</span>";
  382. echo "<ul class=\"menulist\">";
  383. foreach($menu_navigation as $section => $navigation_info) {
  384. $current = ($section == $GLOBALS['this_section'] ? ' id="current"' : '');
  385. echo '<li'.$current.'>';
  386. echo '<a href="'.$navigation_info['url'].'" target="_self">'.$navigation_info['title'].'</a>';
  387. echo '</li>';
  388. echo "\n";
  389. }
  390. echo "</ul>";
  391. echo '</div>';
  392. }
  393. }
  394. // help section
  395. /*** hide right menu "general" and other parts on anonymous right menu *****/
  396. $user_selected_language = api_get_interface_language();
  397. global $home, $home_old;
  398. if (!isset ($user_selected_language))
  399. {
  400. $user_selected_language = $platformLanguage;
  401. }
  402. if (!file_exists($home.'home_menu_'.$user_selected_language.'.html') && file_exists($home.'home_menu.html') && file_get_contents($home.'home_menu.html')!='')
  403. {
  404. echo "<div class=\"menusection\">", "<span class=\"menusectioncaption\">".get_lang("MenuGeneral")."</span>";
  405. echo "<ul class=\"menulist\">";
  406. if (file_exists($home.'home_menu.html'))
  407. include ($home.'home_menu.html');
  408. else {
  409. include ($home_old.'home_menu.html');
  410. }
  411. echo '</ul>';
  412. echo '</div>';
  413. }
  414. elseif(file_exists($home.'home_menu_'.$user_selected_language.'.html') && file_get_contents($home.'home_menu_'.$user_selected_language.'.html')!='')
  415. {
  416. echo "<div class=\"menusection\">", "<span class=\"menusectioncaption\">".get_lang("MenuGeneral")."</span>";
  417. echo "<ul class=\"menulist\">";
  418. include($home.'home_menu_'.$user_selected_language.'.html');
  419. echo '</ul>';
  420. echo '</div>';
  421. }
  422. if ($_user['user_id'] && api_number_of_plugins('campushomepage_menu') > 0) {
  423. echo '<div class="note" style="background: none">';
  424. api_plugin('campushomepage_menu');
  425. echo '</div>';
  426. }
  427. // includes for any files to be displayed below anonymous right menu
  428. if (!file_exists($home.'home_notice_'.$user_selected_language.'.html') && file_exists($home.'home_notice.html') && file_get_contents($home.'home_notice.html')!='') {
  429. echo '<div class="note">';
  430. if (file_exists($home.'home_notice.html'))
  431. include ($home.'home_notice.html');
  432. else {
  433. include ($home_old.'home_notice.html');
  434. }
  435. echo '</div>';
  436. } elseif(file_exists($home.'home_notice_'.$user_selected_language.'.html') && file_get_contents($home.'home_notice_'.$user_selected_language.'.html')!='') {
  437. echo '<div class="note">';
  438. include($home.'home_notice_'.$user_selected_language.'.html');
  439. echo '</div>';
  440. }
  441. }
  442. /**
  443. * Reacts on a failed login:
  444. * displays an explanation with
  445. * a link to the registration form.
  446. *
  447. * @version 1.0.1
  448. */
  449. function handle_login_failed() {
  450. if (!isset($_GET['error'])) {
  451. $message = get_lang("InvalidId");
  452. if (api_is_self_registration_allowed()) {
  453. $message = get_lang("InvalidForSelfRegistration");
  454. }
  455. } else {
  456. switch ($_GET['error']) {
  457. case '':
  458. $message = get_lang('InvalidId');
  459. if (api_is_self_registration_allowed()) {
  460. $message = get_lang('InvalidForSelfRegistration');
  461. }
  462. break;
  463. case 'account_expired':
  464. $message=get_lang('AccountExpired');
  465. break;
  466. case 'account_inactive':
  467. $message=get_lang('AccountInactive');
  468. break;
  469. case 'user_password_incorrect':
  470. $message=get_lang('InvalidId');
  471. break;
  472. case 'access_url_inactive':
  473. $message=get_lang('AccountURLInactive');
  474. break;
  475. }
  476. }
  477. echo "<div id=\"login_fail\">".$message."</div>";
  478. }
  479. /**
  480. * Adds a form to let users login
  481. * @version 1.1
  482. */
  483. function display_login_form()
  484. {
  485. $form = new FormValidator('formLogin');
  486. $form->addElement('text','login',get_lang('UserName'),array('size'=>17));
  487. $form->addElement('password','password',get_lang('Pass'),array('size'=>17));
  488. $form->addElement('style_submit_button','submitAuth',get_lang('langEnter'), array('class'=>'login'));
  489. $renderer =& $form->defaultRenderer();
  490. $renderer->setElementTemplate('<div><label>{label}</label></div><div>{element}</div>');
  491. $form->display();
  492. if (api_get_setting('openid_authentication')=='true') {
  493. include_once('main/auth/openid/login.php');
  494. echo '<div>'.openid_form().'</div>';
  495. }
  496. }
  497. /**
  498. * Displays a link to the lost password section
  499. */
  500. function display_lost_password_info() {
  501. echo "<li><a href=\"main/auth/lostPassword.php\">".get_lang("LostPassword")."</a></li>";
  502. }
  503. /**
  504. * Display list of courses in a category.
  505. * (for anonymous users)
  506. *
  507. * @version 1.1
  508. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University - refactoring and code cleaning
  509. */
  510. function display_anonymous_course_list() {
  511. $ctok = $_SESSION['sec_token'];
  512. $stok = Security::get_token();
  513. //init
  514. $user_identified = (api_get_user_id()>0 && !api_is_anonymous());
  515. $web_course_path = api_get_path(WEB_COURSE_PATH);
  516. $category = Database::escape_string($_GET['category']);
  517. global $setting_show_also_closed_courses;
  518. // Database table definitions
  519. $main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
  520. $main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
  521. $platformLanguage = api_get_setting('platformLanguage');
  522. //get list of courses in category $category
  523. $sql_get_course_list = "SELECT * FROM $main_course_table cours
  524. WHERE category_code = '".Database::escape_string($_GET["category"])."'
  525. ORDER BY title, UPPER(visual_code)";
  526. //showing only the courses of the current access_url_id
  527. global $_configuration;
  528. if ($_configuration['multiple_access_urls']==true) {
  529. $url_access_id = api_get_current_access_url_id();
  530. if ($url_access_id !=-1) {
  531. $tbl_url_rel_course = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  532. $sql_get_course_list="SELECT * FROM $main_course_table as course INNER JOIN $tbl_url_rel_course as url_rel_course
  533. ON (url_rel_course.course_code=course.code)
  534. WHERE access_url_id = $url_access_id AND category_code = '".Database::escape_string($_GET["category"])."' ORDER BY title, UPPER(visual_code)";
  535. }
  536. }
  537. //removed: AND cours.visibility='".COURSE_VISIBILITY_OPEN_WORLD."'
  538. $sql_result_courses = api_sql_query($sql_get_course_list, __FILE__, __LINE__);
  539. while ($course_result = Database::fetch_array($sql_result_courses)) {
  540. $course_list[] = $course_result;
  541. }
  542. $platform_visible_courses = '';
  543. // $setting_show_also_closed_courses
  544. if($user_identified) {
  545. if ($setting_show_also_closed_courses) {
  546. $platform_visible_courses = '';
  547. } else {
  548. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' OR t3.visibility='".COURSE_VISIBILITY_OPEN_PLATFORM."' )";
  549. }
  550. } else {
  551. if ($setting_show_also_closed_courses) {
  552. $platform_visible_courses = '';
  553. } else {
  554. $platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' )";
  555. }
  556. }
  557. $sqlGetSubCatList = "
  558. SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
  559. FROM $main_category_table t1
  560. LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
  561. LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
  562. WHERE t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
  563. GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
  564. //showing only the category of courses of the current access_url_id
  565. global $_configuration;
  566. if ($_configuration['multiple_access_urls']==true) {
  567. $url_access_id = api_get_current_access_url_id();
  568. if ($url_access_id !=-1) {
  569. $tbl_url_rel_course = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  570. $sqlGetSubCatList = "
  571. SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
  572. FROM $main_category_table t1
  573. LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
  574. LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
  575. INNER JOIN $tbl_url_rel_course as url_rel_course
  576. ON (url_rel_course.course_code=t3.code)
  577. WHERE access_url_id = $url_access_id AND t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
  578. GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
  579. }
  580. }
  581. $resCats = api_sql_query($sqlGetSubCatList, __FILE__, __LINE__);
  582. $thereIsSubCat = false;
  583. if (Database::num_rows($resCats) > 0) {
  584. $htmlListCat = "<h4 style=\"margin-top: 0px;\">".get_lang("CatList")."</h4>"."<ul>";
  585. while ($catLine = Database::fetch_array($resCats)) {
  586. if ($catLine['code'] != $category) {
  587. $category_has_open_courses = category_has_open_courses($catLine['code']);
  588. if ($category_has_open_courses) {
  589. //the category contains courses accessible to anonymous visitors
  590. $htmlListCat .= "<li>";
  591. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  592. if (api_get_setting('show_number_of_courses') == 'true') {
  593. $htmlListCat .= " (".$catLine['nbCourse']." ".get_lang("Courses").")";
  594. }
  595. $htmlListCat .= "</li>\n";
  596. $thereIsSubCat = true;
  597. } elseif ($catLine['children_count'] > 0) {
  598. //the category has children, subcategories
  599. $htmlListCat .= "<li>";
  600. $htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
  601. $htmlListCat .= "</li>\n";
  602. $thereIsSubCat = true;
  603. }
  604. /************************************************************************
  605. end changed code to eliminate the (0 courses) after empty categories
  606. ************************************************************************/
  607. elseif (api_get_setting('show_empty_course_categories') == 'true') {
  608. $htmlListCat .= "<li>";
  609. $htmlListCat .= $catLine['name'];
  610. $htmlListCat .= "</li>\n";
  611. $thereIsSubCat = true;
  612. }//else don't set thereIsSubCat to true to avoid printing things if not requested
  613. } else {
  614. $htmlTitre = "<p>";
  615. if (api_get_setting('show_back_link_on_top_of_tree') == 'true') {
  616. $htmlTitre .= "<a href=\"".api_get_self()."\">"."&lt;&lt; ".get_lang("BackToHomePage")."</a>";
  617. }
  618. if (!is_null($catLine['parent_id']) || (api_get_setting('show_back_link_on_top_of_tree') <> 'true' && !is_null($catLine['code']))) {
  619. $htmlTitre .= "<a href=\"".api_get_self()."?category=".$catLine['parent_id']."\">"."&lt;&lt; ".get_lang("Up")."</a>";
  620. }
  621. $htmlTitre .= "</p>\n";
  622. if ($category != "" && !is_null($catLine['code'])) {
  623. $htmlTitre .= "<h3>".$catLine['name']."</h3>\n";
  624. } else {
  625. $htmlTitre .= "<h3>".get_lang("Categories")."</h3>\n";
  626. }
  627. }
  628. }
  629. $htmlListCat .= "</ul>\n";
  630. }
  631. echo $htmlTitre;
  632. if ($thereIsSubCat) {
  633. echo $htmlListCat;
  634. }
  635. while ($categoryName = Database::fetch_array($resCats)) {
  636. echo "<h3>", $categoryName['name'], "</h3>\n";
  637. }
  638. $numrows = Database::num_rows($sql_result_courses);
  639. $courses_list_string = '';
  640. $courses_shown = 0;
  641. if ($numrows > 0) {
  642. if ($thereIsSubCat) {
  643. $courses_list_string .= "<hr size=\"1\" noshade=\"noshade\">\n";
  644. }
  645. $courses_list_string .= "<h4 style=\"margin-top: 0px;\">".get_lang("CourseList")."</h4>\n"."<ul>\n";
  646. if (api_get_user_id()) {
  647. $courses_of_user = get_courses_of_user(api_get_user_id());
  648. }
  649. foreach ($course_list AS $course) {
  650. // $setting_show_also_closed_courses
  651. if ($setting_show_also_closed_courses==false) {
  652. // if we do not show the closed courses
  653. // we only show the courses that are open to the world (to everybody)
  654. // and the courses that are open to the platform (if the current user is a registered user
  655. if( ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM) OR ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)) {
  656. $courses_shown++;
  657. $courses_list_string .= "<li>\n";
  658. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">".$course['title']."</a><br />";
  659. if (get_setting("display_coursecode_in_courselist") == "true") {
  660. $courses_list_string .= $course['visual_code'];
  661. }
  662. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  663. $courses_list_string .= " - ";
  664. }
  665. if (get_setting("display_teacher_in_courselist") == "true") {
  666. $courses_list_string .= $course['tutor_name'];
  667. }
  668. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  669. $courses_list_string .= ' - '.$course['course_language'];
  670. }
  671. $courses_list_string .= "</li>\n";
  672. }
  673. }
  674. // we DO show the closed courses.
  675. // the course is accessible if (link to the course homepage)
  676. // 1. the course is open to the world (doesn't matter if the user is logged in or not): $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)
  677. // 2. the user is logged in and the course is open to the world or open to the platform: ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  678. // 3. the user is logged in and the user is subscribed to the course and the course visibility is not COURSE_VISIBILITY_CLOSED
  679. // 4. the user is logged in and the user is course admin of te course (regardless of the course visibility setting)
  680. // 5. the user is the platform admin api_is_platform_admin()
  681. //
  682. else {
  683. $courses_shown++;
  684. $courses_list_string .= "<li>\n";
  685. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  686. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  687. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  688. OR $courses_of_user[$course['code']]['status'] == '1'
  689. OR api_is_platform_admin()) {
  690. $courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">";
  691. }
  692. $courses_list_string .= $course['title'];
  693. if ( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  694. OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  695. OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
  696. OR $courses_of_user[$course['code']]['status'] == '1'
  697. OR api_is_platform_admin()) {
  698. $courses_list_string .="</a><br />";
  699. }
  700. if (get_setting("display_coursecode_in_courselist") == "true") {
  701. $courses_list_string .= $course['visual_code'];
  702. }
  703. if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true") {
  704. $courses_list_string .= " - ";
  705. }
  706. if (get_setting("display_teacher_in_courselist") == "true")
  707. {
  708. $courses_list_string .= $course['tutor_name'];
  709. }
  710. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  711. $courses_list_string .= ' - '.$course['course_language'];
  712. }
  713. if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage')) {
  714. $courses_list_string .= ' - '.$course['course_language'];
  715. }
  716. // We display a subscription link if
  717. // 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
  718. // 2
  719. if ($user_identified AND !key_exists($course['code'],$courses_of_user)) {
  720. if ($course['subscribe'] == '1') {
  721. $courses_list_string .= "<form action=\"main/auth/courses.php?action=subscribe&category=".$_GET['category']."\" method=\"post\">";
  722. $courses_list_string .= '<input type="hidden" name="sec_token" value="'.$stok.'">';
  723. $courses_list_string .= "<input type=\"hidden\" name=\"subscribe\" value=\"".$course['code']."\" />";
  724. $courses_list_string .= "<input type=\"image\" name=\"unsub\" src=\"main/img/enroll.gif\" alt=\"".get_lang("Subscribe")."\" />".get_lang("Subscribe")."</form>";
  725. } else {
  726. $courses_list_string .= '<br />'.get_lang("SubscribingNotAllowed");
  727. }
  728. }
  729. $courses_list_string .= "</li>\n";
  730. }
  731. }
  732. $courses_list_string .= "</ul>\n";
  733. } else {
  734. // echo "<blockquote>",get_lang('_No_course_publicly_available'),"</blockquote>\n";
  735. }
  736. if ($courses_shown > 0) { //only display the list of courses and categories if there was more than
  737. // 0 courses visible to the world (we're in the anonymous list here)
  738. echo $courses_list_string;
  739. }
  740. if ($category != "") {
  741. echo "<p>", "<a href=\"".api_get_self()."\"><b></b> ", Display :: return_icon('back.png', get_lang('BackToHomePage')),get_lang("BackToHomePage"), "</a>", "</p>\n";
  742. }
  743. }
  744. /**
  745. * retrieves all the courses that the user has already subscribed to
  746. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Belgium
  747. * @param int $user_id: the id of the user
  748. * @return array an array containing all the information of the courses of the given user
  749. */
  750. function get_courses_of_user($user_id) {
  751. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  752. $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  753. // Secondly we select the courses that are in a category (user_course_cat<>0) and sort these according to the sort of the category
  754. $user_id = intval($user_id);
  755. $sql_select_courses="SELECT course.code k, course.visual_code vc, course.subscribe subscr, course.unsubscribe unsubscr,
  756. course.title i, course.tutor_name t, course.db_name db, course.directory dir, course_rel_user.status status,
  757. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat
  758. FROM $table_course course,
  759. $table_course_user course_rel_user
  760. WHERE course.code = course_rel_user.course_code
  761. AND course_rel_user.user_id = '".$user_id."'
  762. ORDER BY course_rel_user.sort ASC";
  763. $result = api_sql_query($sql_select_courses,__FILE__,__LINE__);
  764. while ($row=Database::fetch_array($result)) {
  765. // we only need the database name of the course
  766. $courses[$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']);
  767. }
  768. return $courses;
  769. }