course.lib.php 176 KB

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  1. <?php
  2. /* For licensing terms, see /license.txt*/
  3. /**
  4. * This is the course library for Chamilo.
  5. *
  6. * All main course functions should be placed here.
  7. *
  8. * Many functions of this library deal with providing support for
  9. * virtual/linked/combined courses (this was already used in several universities
  10. * but not available in standard Chamilo).
  11. *
  12. * The implementation changed, initially a course was a real course
  13. * if target_course_code was 0 , this was changed to NULL.
  14. * There are probably some places left with the wrong code.
  15. *
  16. * @package chamilo.library
  17. */
  18. /**
  19. DOCUMENTATION
  20. (list not up to date, you can auto generate documentation with phpDocumentor)
  21. CourseManager::get_real_course_code_select_html($element_name, $has_size=true, $only_current_user_courses=true)
  22. CourseManager::check_parameter($parameter, $error_message)
  23. CourseManager::check_parameter_or_fail($parameter, $error_message)
  24. CourseManager::course_code_exists($wanted_course_code)
  25. CourseManager::get_real_course_list()
  26. CourseManager::get_virtual_course_list()
  27. GENERAL COURSE FUNCTIONS
  28. CourseManager::get_access_settings($course_code)
  29. CourseManager::set_course_tool_visibility($tool_table_id, $visibility)
  30. CourseManager::get_user_in_course_status($user_id, $course_code)
  31. CourseManager::add_user_to_course($user_id, $course_code)
  32. CourseManager::get_virtual_course_info($real_course_code)
  33. CourseManager::is_virtual_course_from_visual_code($visual_code)
  34. CourseManager::is_virtual_course_from_system_code($system_code)
  35. CourseManager::get_virtual_courses_linked_to_real_course($real_course_code)
  36. CourseManager::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)
  37. CourseManager::has_virtual_courses_from_code($real_course_code, $user_id)
  38. CourseManager::get_target_of_linked_course($virtual_course_code)
  39. TITLE AND CODE FUNCTIONS
  40. CourseManager::create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list)
  41. CourseManager::create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list)
  42. USER FUNCTIONS
  43. CourseManager::get_real_course_list_of_user_as_course_admin($user_id)
  44. CourseManager::get_course_list_of_user_as_course_admin($user_id)
  45. CourseManager::is_user_subscribed_in_course($user_id, $course_code)
  46. CourseManager::is_user_subscribed_in_real_or_linked_course($user_id, $course_code)
  47. CourseManager::get_user_list_from_course_code($course_code)
  48. CourseManager::get_real_and_linked_user_list($course_code);
  49. GROUP FUNCTIONS
  50. CourseManager::get_group_list_of_course($course_code)
  51. CREATION FUNCTIONS
  52. CourseManager::attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category)
  53. */
  54. /* INIT SECTION */
  55. require_once api_get_path(CONFIGURATION_PATH).'add_course.conf.php';
  56. require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
  57. /**
  58. * CourseManager Class
  59. * @package chamilo.library
  60. */
  61. class CourseManager {
  62. CONST MAX_COURSE_LENGTH_CODE = 40;
  63. //This constant is used to show separate user names in the course list (userportal), footer, etc
  64. CONST USER_SEPARATOR = ' |';
  65. CONST COURSE_FIELD_TYPE_CHECKBOX = 10;
  66. var $columns = array();
  67. /**
  68. * Creates a course
  69. * @param array with the columns in the main.course table
  70. * @param mixed false if the course was not created, array with the course info
  71. */
  72. static function create_course($params) {
  73. global $_configuration;
  74. // Check portal limits
  75. $access_url_id = 1;
  76. if (api_get_multiple_access_url()) {
  77. $access_url_id = api_get_current_access_url_id();
  78. }
  79. if (is_array($_configuration[$access_url_id]) && isset($_configuration[$access_url_id]['hosting_limit_courses']) && $_configuration[$access_url_id]['hosting_limit_courses'] > 0) {
  80. $num = self::count_courses();
  81. if ($num >= $_configuration[$access_url_id]['hosting_limit_courses']) {
  82. return api_set_failure('PortalCoursesLimitReached');
  83. }
  84. }
  85. if (empty($params['title'])) {
  86. return false;
  87. }
  88. if (empty($params['wanted_code'])) {
  89. $params['wanted_code'] = $params['title'];
  90. // Check whether the requested course code has already been occupied.
  91. $params['wanted_code'] = generate_course_code(api_substr($params['title'], 0, self::MAX_COURSE_LENGTH_CODE));
  92. }
  93. // Create the course keys
  94. $keys = define_course_keys($params['wanted_code']);
  95. $params['exemplary_content'] = isset($params['exemplary_content']) ? $params['exemplary_content'] : false;
  96. if (count($keys)) {
  97. $params['code'] = $keys['currentCourseCode'];
  98. $params['visual_code'] = $keys['currentCourseId'];
  99. $params['directory'] = $keys['currentCourseRepository'];
  100. $course_info = api_get_course_info($params['code']);
  101. if (empty($course_info)) {
  102. $course_id = register_course($params);
  103. $course_info = api_get_course_info_by_id($course_id);
  104. if (!empty($course_info)) {
  105. prepare_course_repository($course_info['directory'], $course_info['code']);
  106. fill_db_course($course_id, $course_info['directory'], $course_info['course_language'], $params['exemplary_content']);
  107. if (api_get_setting('gradebook_enable_grade_model') == 'true') {
  108. //Create gradebook_category for the new course and add a gradebook model for the course
  109. if (isset($params['gradebook_model_id']) && !empty($params['gradebook_model_id']) && $params['gradebook_model_id'] != '-1') {
  110. require_once api_get_path(SYS_CODE_PATH).'gradebook/lib/gradebook_functions.inc.php';
  111. create_default_course_gradebook($course_info['code'], $params['gradebook_model_id']);
  112. }
  113. }
  114. return $course_info;
  115. }
  116. }
  117. }
  118. return false;
  119. }
  120. /**
  121. * Returns all the information of a given coursecode
  122. * @param string $course_code, the course code
  123. * @return an array with all the fields of the course table
  124. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  125. */
  126. public static function get_course_information($course_code) {
  127. return Database::fetch_array(Database::query(
  128. "SELECT *, id as real_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  129. WHERE code='".Database::escape_string($course_code)."'"),'ASSOC'
  130. );
  131. }
  132. /**
  133. * Returns all the information of a given coursecode
  134. * @param int the course id
  135. * @return an array with all the fields of the course table
  136. */
  137. public static function get_course_information_by_id($course_id) {
  138. return Database::select('*, id as real_id', Database::get_main_table(TABLE_MAIN_COURSE), array('where'=>array('id = ?' =>intval($course_id))),'first');
  139. }
  140. /**
  141. * Returns a list of courses. Should work with quickform syntax
  142. * @param integer Offset (from the 7th = '6'). Optional.
  143. * @param integer Number of results we want. Optional.
  144. * @param string The column we want to order it by. Optional, defaults to first column.
  145. * @param string The direction of the order (ASC or DESC). Optional, defaults to ASC.
  146. * @param string The visibility of the course, or all by default.
  147. * @param string If defined, only return results for which the course *title* begins with this string
  148. */
  149. public static function get_courses_list($from = 0, $howmany = 0, $orderby = 1, $orderdirection = 'ASC', $visibility = -1, $startwith = '') {
  150. $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." ";
  151. if (!empty($startwith)) {
  152. $sql .= "WHERE title LIKE '".Database::escape_string($startwith)."%' ";
  153. if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
  154. $sql .= " AND visibility = $visibility ";
  155. }
  156. } else {
  157. $sql .= "WHERE 1 ";
  158. if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
  159. $sql .= " AND visibility = $visibility ";
  160. }
  161. }
  162. if (!empty($orderby)) {
  163. $sql .= " ORDER BY ".Database::escape_string($orderby)." ";
  164. } else {
  165. $sql .= " ORDER BY 1 ";
  166. }
  167. if (!in_array($orderdirection, array('ASC', 'DESC'))) {
  168. $sql .= 'ASC';
  169. } else {
  170. $sql .= Database::escape_string($orderdirection);
  171. }
  172. if (!empty($howmany) && is_int($howmany) and $howmany > 0) {
  173. $sql .= ' LIMIT '.Database::escape_string($howmany);
  174. } else {
  175. $sql .= ' LIMIT 1000000'; //virtually no limit
  176. }
  177. if (!empty($from)) {
  178. $from = intval($from);
  179. $sql .= ' OFFSET '.Database::escape_string($from);
  180. } else {
  181. $sql .= ' OFFSET 0';
  182. }
  183. return Database::store_result(Database::query($sql));
  184. }
  185. /**
  186. * Returns the access settings of the course:
  187. * which visibility;
  188. * wether subscribing is allowed;
  189. * wether unsubscribing is allowed.
  190. *
  191. * @param string $course_code, the course code
  192. * @todo for more consistency: use course_info call from database API
  193. * @return an array with int fields "visibility", "subscribe", "unsubscribe"
  194. */
  195. public static function get_access_settings($course_code) {
  196. return Database::fetch_array(Database::query(
  197. "SELECT visibility, subscribe, unsubscribe from ".Database::get_main_table(TABLE_MAIN_COURSE)."
  198. WHERE code = '".Database::escape_string($course_code)."'")
  199. );
  200. }
  201. /**
  202. * Returns the status of a user in a course, which is COURSEMANAGER or STUDENT.
  203. * @param int User ID
  204. * @param string Course code
  205. * @return int the status of the user in that course
  206. */
  207. public static function get_user_in_course_status($user_id, $course_code) {
  208. $result = Database::fetch_array(Database::query(
  209. "SELECT status FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  210. WHERE course_code = '".Database::escape_string($course_code)."' AND user_id = ".Database::escape_string($user_id))
  211. );
  212. return $result['status'];
  213. }
  214. public static function get_tutor_in_course_status($user_id, $course_code) {
  215. $result = Database::fetch_array(Database::query(
  216. "SELECT tutor_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  217. WHERE course_code = '".Database::escape_string($course_code)."' AND user_id = ".Database::escape_string($user_id))
  218. );
  219. return $result['tutor_id'];
  220. }
  221. /**
  222. * Unsubscribe one or more users from a course
  223. *
  224. * @param mixed user_id or an array with user ids
  225. * @param int session id
  226. * @param string course code
  227. *
  228. */
  229. public static function unsubscribe_user($user_id, $course_code, $session_id = 0) {
  230. if (!is_array($user_id)) {
  231. $user_id = array($user_id);
  232. }
  233. if (count($user_id) == 0) {
  234. return;
  235. }
  236. $table_user = Database :: get_main_table(TABLE_MAIN_USER);
  237. if (!empty($session_id)) {
  238. $session_id = intval($session_id);
  239. } else {
  240. $session_id = intval($_SESSION['id_session']);
  241. }
  242. $user_list = array();
  243. //Cleaning the $user_id variable
  244. if (is_array($user_id)) {
  245. $new_user_id_list = array();
  246. foreach($user_id as $my_user_id) {
  247. $new_user_id_list[]= intval($my_user_id);
  248. }
  249. $new_user_id_list = array_filter($new_user_id_list);
  250. $user_list = $new_user_id_list;
  251. $user_ids = implode(',', $new_user_id_list);
  252. } else {
  253. $user_ids = intval($user_id);
  254. $user_list[] = $user_id;
  255. }
  256. $course_info = api_get_course_info($course_code);
  257. $course_id = $course_info['real_id'];
  258. // Unsubscribe user from all groups in the course.
  259. Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_USER)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
  260. Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_TUTOR)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
  261. // Erase user student publications (works) in the course - by André Boivin
  262. //@todo field student_publication.author should be the user id
  263. $sqlu = "SELECT * FROM $table_user WHERE user_id IN (".$user_ids.")";
  264. $resu = Database::query($sqlu);
  265. $username = Database::fetch_array($resu,'ASSOC');
  266. $userfirstname = $username['firstname'];
  267. $userlastname = $username['lastname'];
  268. $publication_name = $userfirstname.' '.$userlastname ;
  269. $table_course_user_publication = Database :: get_course_table(TABLE_STUDENT_PUBLICATION);
  270. $sql = "DELETE FROM $table_course_user_publication WHERE c_id = $course_id AND author = '".Database::escape_string($publication_name)."'";
  271. Database::query($sql);
  272. // Unsubscribe user from all blogs in the course.
  273. Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_REL_USER)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
  274. Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_TASKS_REL_USER)."WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
  275. //Deleting users in forum_notification and mailqueue course tables
  276. $sql_delete_forum_notification = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_NOTIFICATION)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")";
  277. Database::query($sql_delete_forum_notification);
  278. $sql_delete_mail_queue = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_MAIL_QUEUE)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")";
  279. Database::query($sql_delete_mail_queue);
  280. // Unsubscribe user from the course.
  281. if (!empty($session_id)) {
  282. // Delete in table session_rel_course_rel_user
  283. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  284. WHERE id_session ='".$session_id."' AND course_code = '".Database::escape_string($_SESSION['_course']['id'])."' AND id_user IN ($user_ids)");
  285. foreach ($user_id as $uid) {
  286. // check if a user is register in the session with other course
  287. $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='$session_id' AND id_user='$uid'";
  288. $rs = Database::query($sql);
  289. if (Database::num_rows($rs) == 0) {
  290. // Delete in table session_rel_user
  291. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  292. WHERE id_session ='".$session_id."' AND id_user='$uid' AND relation_type<>".SESSION_RELATION_TYPE_RRHH."");
  293. }
  294. }
  295. // Update the table session
  296. $row = Database::fetch_array(Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  297. WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." "));
  298. $count = $row[0]; // number of users by session
  299. $result = Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count'
  300. WHERE id = '".$session_id."'");
  301. // Update the table session_rel_course
  302. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '$session_id' AND course_code = '$course_code' AND status<>2" ));
  303. $count = $row[0]; // number of users by session and course
  304. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '$session_id' AND course_code = '$course_code' ");
  305. } else {
  306. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  307. WHERE user_id IN (".$user_ids.") AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '".$course_code."'");
  308. // add event to system log
  309. $user_id = api_get_user_id();
  310. event_system(LOG_UNSUBSCRIBE_USER_FROM_COURSE, LOG_COURSE_CODE, $course_code, api_get_utc_datetime(), $user_id);
  311. foreach ($user_list as $user_id_to_delete) {
  312. $user_info = api_get_user_info($user_id_to_delete);
  313. event_system(LOG_UNSUBSCRIBE_USER_FROM_COURSE, LOG_USER_OBJECT, $user_info, api_get_utc_datetime(), $user_id);
  314. }
  315. }
  316. }
  317. /**
  318. * Subscribe a user to a course. No checks are performed here to see if
  319. * course subscription is allowed.
  320. * @param int User ID
  321. * @param string Course code
  322. * @param int Status (STUDENT, COURSEMANAGER, COURSE_ADMIN, NORMAL_COURSE_MEMBER)
  323. * @return bool True on success, false on failure
  324. * @see add_user_to_course
  325. */
  326. public static function subscribe_user($user_id, $course_code, $status = STUDENT, $session_id = 0) {
  327. if ($user_id != strval(intval($user_id))) {
  328. return false; //detected possible SQL injection
  329. }
  330. $course_code = Database::escape_string($course_code);
  331. if (empty ($user_id) || empty ($course_code)) {
  332. return false;
  333. }
  334. if (!empty($session_id)) {
  335. $session_id = intval($session_id);
  336. } else {
  337. $session_id = api_get_session_id();
  338. }
  339. $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
  340. //$role_id = ($status == COURSEMANAGER) ? COURSE_ADMIN : NORMAL_COURSE_MEMBER;
  341. // A preliminary check whether the user has bben already registered on the platform.
  342. if (Database::num_rows(@Database::query("SELECT status FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  343. WHERE user_id = '$user_id' ")) == 0) {
  344. return false; // The user has not been registered to the platform.
  345. }
  346. // Check whether the user has not been already subscribed to the course.
  347. if (empty($session_id)) {
  348. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  349. WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$course_code'")) > 0) {
  350. return false; // The user has been already subscribed to the course.
  351. }
  352. }
  353. if (!empty($session_id)) {
  354. // Check whether the user has not already been stored in the session_rel_course_user table
  355. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  356. WHERE course_code = '".$_SESSION['_course']['id']."'
  357. AND id_session ='".$session_id."'
  358. AND id_user = '".$user_id."'")) > 0) {
  359. return false;
  360. }
  361. // check if the user is registered in the session with other course
  362. $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='".$session_id."' AND id_user='$user_id'";
  363. $rs = Database::query($sql);
  364. if (Database::num_rows($rs) == 0) {
  365. // Check whether the user has not already been stored in the session_rel_user table
  366. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  367. WHERE id_session ='".$session_id."'
  368. AND id_user = '".$user_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." ")) > 0) {
  369. return false;
  370. }
  371. }
  372. // Add him/her in the table session_rel_course_rel_user
  373. @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  374. SET id_session ='".$session_id."',
  375. course_code = '".$_SESSION['_course']['id']."',
  376. id_user = '".$user_id."'");
  377. // Add him/her in the table session_rel_user
  378. @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  379. SET id_session ='".$session_id."',
  380. id_user = '".$user_id."'");
  381. // Update the table session
  382. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)." WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH.""));
  383. $count = $row[0]; // number of users by session
  384. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count' WHERE id = '".$session_id."'");
  385. // Update the table session_rel_course
  386. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '".$session_id."' AND course_code = '$course_code' AND status<>2" ));
  387. $count = $row[0]; // number of users by session
  388. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '".$session_id."' AND course_code = '$course_code' ");
  389. } else {
  390. $course_sort = self::userCourseSort($user_id, $course_code);
  391. $result = @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  392. SET course_code = '$course_code',
  393. user_id = '$user_id',
  394. status = '".$status."',
  395. sort = '". ($course_sort)."'");
  396. // Add event to the system log
  397. event_system(LOG_SUBSCRIBE_USER_TO_COURSE, LOG_COURSE_CODE, $course_code, api_get_utc_datetime(), api_get_user_id());
  398. $user_info = api_get_user_info($user_id);
  399. event_system(LOG_SUBSCRIBE_USER_TO_COURSE, LOG_USER_OBJECT, $user_info, api_get_utc_datetime(), api_get_user_id());
  400. }
  401. return (bool)$result;
  402. }
  403. /**
  404. * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
  405. *
  406. * @param string Original course id
  407. * @param string Original field name
  408. * @return int Course id
  409. */
  410. public static function get_course_code_from_original_id($original_course_id_value, $original_course_id_name) {
  411. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  412. $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  413. $sql_course = "SELECT course_code FROM $table_field cf INNER JOIN $t_cfv cfv ON cfv.field_id=cf.id WHERE field_variable='$original_course_id_name' AND field_value='$original_course_id_value'";
  414. $res = Database::query($sql_course);
  415. $row = Database::fetch_object($res);
  416. if ($row) {
  417. return $row->course_code;
  418. } else {
  419. return 0;
  420. }
  421. }
  422. /**
  423. * Gets the course code from the course id. Returns null if course id was not found
  424. *
  425. * @param int Course id
  426. * @return string Course code
  427. */
  428. public static function get_course_code_from_course_id($id) {
  429. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  430. $id = intval($id);
  431. $sql = "SELECT code FROM $table WHERE id = '$id' ";
  432. $res = Database::query($sql);
  433. $row = Database::fetch_object($res);
  434. if ($row) {
  435. return $row->code;
  436. } else {
  437. return null;
  438. }
  439. }
  440. /**
  441. * Subscribe a user $user_id to a course $course_code.
  442. * @author Hugues Peeters
  443. * @author Roan Embrechts
  444. *
  445. * @param int $user_id the id of the user
  446. * @param string $course_code the course code
  447. * @param string $status (optional) The user's status in the course
  448. *
  449. * @return boolean true if subscription succeeds, boolean false otherwise.
  450. */
  451. public static function add_user_to_course($user_id, $course_code, $status = STUDENT) {
  452. $debug = false;
  453. $user_table = Database::get_main_table(TABLE_MAIN_USER);
  454. $course_table = Database::get_main_table(TABLE_MAIN_COURSE);
  455. $course_user_table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  456. $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
  457. if (empty($user_id) || empty($course_code) || ($user_id != strval(intval($user_id)))) {
  458. return false;
  459. }
  460. $course_code = Database::escape_string($course_code);
  461. // Check in advance whether the user has already been registered on the platform.
  462. if (Database::num_rows(Database::query("SELECT status FROM ".$user_table." WHERE user_id = '$user_id' ")) == 0) {
  463. if ($debug) error_log('The user has not been registered to the platform');
  464. return false; // The user has not been registered to the platform.
  465. }
  466. // Check whether the user has already been subscribed to this course.
  467. if (Database::num_rows(Database::query("SELECT * FROM ".$course_user_table." WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$course_code'")) > 0) {
  468. if ($debug) error_log('The user has been already subscribed to the course');
  469. return false; // The user has been subscribed to the course.
  470. }
  471. // Check in advance whether subscription is allowed or not for this course.
  472. if (Database::num_rows(Database::query("SELECT code, visibility FROM ".$course_table." WHERE code = '$course_code' AND subscribe = '".SUBSCRIBE_NOT_ALLOWED."'")) > 0) {
  473. if ($debug) error_log('Subscription is not allowed for this course');
  474. return false; // Subscription is not allowed for this course.
  475. }
  476. // Ok, subscribe the user.
  477. $max_sort = api_max_sort_value('0', $user_id);
  478. return (bool)Database::query("INSERT INTO ".$course_user_table."
  479. SET course_code = '$course_code',
  480. user_id = '$user_id',
  481. status = '".$status."',
  482. sort = '". ($max_sort + 1)."'");
  483. }
  484. /**
  485. * Checks wether a parameter exists.
  486. * If it doesn't, the function displays an error message.
  487. *
  488. * @return true if parameter is set and not empty, false otherwise
  489. * @todo move function to better place, main_api ?
  490. */
  491. public static function check_parameter($parameter, $error_message) {
  492. if (empty($parameter)) {
  493. Display::display_normal_message($error_message);
  494. return false;
  495. }
  496. return true;
  497. }
  498. /**
  499. * Lets the script die when a parameter check fails.
  500. * @todo move function to better place, main_api ?
  501. */
  502. public static function check_parameter_or_fail($parameter, $error_message) {
  503. if (!self::check_parameter($parameter, $error_message)) {
  504. die();
  505. }
  506. }
  507. /**
  508. * @return true if there already are one or more courses
  509. * with the same code OR visual_code (visualcode), false otherwise
  510. */
  511. public static function course_code_exists($wanted_course_code) {
  512. $wanted_course_code = Database::escape_string($wanted_course_code);
  513. $result = Database::fetch_array(Database::query("SELECT COUNT(*) as number FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE code = '$wanted_course_code' OR visual_code = '$wanted_course_code'"));
  514. return $result['number'] > 0;
  515. }
  516. /**
  517. * @return an array with the course info of all real courses on the platform
  518. */
  519. public static function get_real_course_list() {
  520. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NULL");
  521. $real_course_list = array();
  522. while ($result = Database::fetch_array($sql_result)) {
  523. $real_course_list[$result['code']] = $result;
  524. }
  525. return $real_course_list;
  526. }
  527. /**
  528. * Lists all virtual courses
  529. * @return array Course info (course code => details) of all virtual courses on the platform
  530. */
  531. public static function get_virtual_course_list() {
  532. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NOT NULL");
  533. $virtual_course_list = array();
  534. while ($result = Database::fetch_array($sql_result)) {
  535. $virtual_course_list[$result['code']] = $result;
  536. }
  537. return $virtual_course_list;
  538. }
  539. /**
  540. * Returns an array with the course info of the real courses of which
  541. * the current user is course admin
  542. * @return array A list of courses details for courses to which the user is subscribed as course admin (status = 1)
  543. */
  544. public static function get_real_course_list_of_user_as_course_admin($user_id) {
  545. $result_array = array();
  546. if ($user_id != strval(intval($user_id))) {
  547. return $result_array;
  548. }
  549. $sql_result = Database::query("SELECT *
  550. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  551. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  552. ON course.code = course_user.course_code
  553. WHERE course.target_course_code IS NULL
  554. AND course_user.user_id = '$user_id'
  555. AND course_user.status = '1'");
  556. if ($sql_result === false) { return $result_array; }
  557. while ($result = Database::fetch_array($sql_result)) {
  558. $result_array[] = $result;
  559. }
  560. return $result_array;
  561. }
  562. /**
  563. * Get course list as coach
  564. *
  565. * @param int user id
  566. * @return array course list
  567. *
  568. * */
  569. public static function get_course_list_as_coach($user_id, $include_courses_in_sessions = false) {
  570. //1. Getting courses as teacher (No session)
  571. $courses_temp = CourseManager::get_course_list_of_user_as_course_admin($user_id);
  572. $courses_as_admin = array();
  573. if (!empty($courses_temp)) {
  574. foreach($courses_temp as $course_item) {
  575. $courses_as_admin[0][$course_item['course_code']] = $course_item['course_code'];
  576. }
  577. }
  578. //2. Include courses in sessions
  579. if ($include_courses_in_sessions) {
  580. $sessions = Tracking::get_sessions_coached_by_user($user_id);
  581. if (!empty($sessions)) {
  582. foreach($sessions as $session_item) {
  583. $courses = Tracking :: get_courses_followed_by_coach($user_id, $session_item['id']);
  584. if (is_array($courses)) {
  585. foreach($courses as $course_item) {
  586. $courses_as_admin[$session_item['id']][$course_item] = $course_item;
  587. }
  588. }
  589. }
  590. }
  591. }
  592. return $courses_as_admin;
  593. }
  594. public static function get_user_list_from_courses_as_coach($user_id, $include_sessions = true) {
  595. $courses_as_admin = $students_in_courses = array();
  596. $sessions = CourseManager::get_course_list_as_coach($user_id, true);
  597. if (!empty($sessions)) {
  598. foreach($sessions as $session_id => $courses) {
  599. if (!$include_sessions) {
  600. if (!empty($session_id)) {
  601. continue;
  602. }
  603. }
  604. if (empty($session_id)) {
  605. foreach($courses as $course_code) {
  606. $students_in_course = CourseManager::get_user_list_from_course_code($course_code);
  607. foreach($students_in_course as $user_item) {
  608. //Only students
  609. if ($user_item['status_rel'] == STUDENT)
  610. $students_in_courses[$user_item['user_id']] = $user_item['user_id'];
  611. }
  612. }
  613. } else {
  614. $students_in_course = SessionManager::get_users_by_session($session_id, '0');
  615. foreach($students_in_course as $user_item) {
  616. $students_in_courses[$user_item['user_id']] = $user_item['user_id'];
  617. }
  618. }
  619. }
  620. }
  621. $students = Tracking :: get_student_followed_by_coach($user_id);
  622. if (!empty($students_in_courses)) {
  623. if (!empty($students)) {
  624. $students = array_merge($students, $students_in_courses);
  625. } else {
  626. $students = $students_in_courses;
  627. }
  628. }
  629. if (!empty($students)) {
  630. $students = array_unique($students);
  631. }
  632. return $students;
  633. }
  634. /**
  635. * @return an array with the course info of all the courses (real and virtual) of which
  636. * the current user is course admin
  637. */
  638. public static function get_course_list_of_user_as_course_admin($user_id) {
  639. if ($user_id != strval(intval($user_id))) {
  640. return array();
  641. }
  642. // Definitions database tables and variables
  643. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  644. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  645. $user_id = intval($user_id);
  646. $data = array();
  647. $sql_nb_cours = "SELECT course_rel_user.course_code, course.title, course.id, course.db_name, course.id as real_id
  648. FROM $tbl_course_user as course_rel_user
  649. INNER JOIN $tbl_course as course
  650. ON course.code = course_rel_user.course_code
  651. WHERE course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
  652. ORDER BY course.title";
  653. if (api_get_multiple_access_url()) {
  654. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  655. $access_url_id = api_get_current_access_url_id();
  656. if ($access_url_id != -1) {
  657. $sql_nb_cours = " SELECT course_rel_user.course_code, course.title, course.id, course.db_name, course.id as real_id
  658. FROM $tbl_course_user as course_rel_user
  659. INNER JOIN $tbl_course as course
  660. ON course.code = course_rel_user.course_code
  661. INNER JOIN $tbl_course_rel_access_url course_rel_url
  662. ON (course_rel_url.course_code= course.code)
  663. WHERE access_url_id = $access_url_id AND course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
  664. ORDER BY course.title";
  665. }
  666. }
  667. $result_nb_cours = Database::query($sql_nb_cours);
  668. if (Database::num_rows($result_nb_cours) > 0) {
  669. while ($row = Database::fetch_array($result_nb_cours,'ASSOC')) {
  670. $data[$row['course_code']] = $row;
  671. }
  672. }
  673. return $data;
  674. }
  675. /**
  676. * Find out for which courses the user is registered and determine a visual course code and course title from that.
  677. * Takes virtual courses into account
  678. *
  679. * Default case: the name and code stay what they are.
  680. *
  681. * Scenarios:
  682. * - User is registered in real course and virtual courses; name / code become a mix of all
  683. * - User is registered in real course only: name stays that of real course
  684. * - User is registered in virtual course only: name becomes that of virtual course
  685. * - user is not registered to any of the real/virtual courses: name stays that of real course
  686. * (I'm not sure about the last case, but this seems not too bad)
  687. *
  688. * @author Roan Embrechts
  689. * @param $user_id, the id of the user
  690. * @param $course_info, an array with course info that you get using Database::get_course_info($course_system_code);
  691. * @return an array with indices
  692. * $return_result['title'] - the course title of the combined courses
  693. * $return_result['code'] - the course code of the combined courses
  694. * @deprecated use api_get_course_info()
  695. */
  696. public static function determine_course_title_from_course_info($user_id, $course_info) {
  697. if ($user_id != strval(intval($user_id))) {
  698. return array();
  699. }
  700. $real_course_id = $course_info['system_code'];
  701. $real_course_info = Database::get_course_info($real_course_id);
  702. $real_course_name = $real_course_info['title'];
  703. $real_course_visual_code = $real_course_info['visual_code'];
  704. $real_course_real_code = Database::escape_string($course_info['system_code']);
  705. //is the user registered in the real course?
  706. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  707. WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$real_course_real_code'"));
  708. $user_is_registered_in_real_course = !empty($result);
  709. //get a list of virtual courses linked to the current real course and to which the current user is subscribed
  710. $user_subscribed_virtual_course_list = self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_id);
  711. $virtual_courses_exist = count($user_subscribed_virtual_course_list) > 0;
  712. //now determine course code and name
  713. if ($user_is_registered_in_real_course && $virtual_courses_exist) {
  714. $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
  715. $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
  716. }
  717. elseif ($user_is_registered_in_real_course) {
  718. //course name remains real course name
  719. $course_info['name'] = $real_course_name;
  720. $course_info['official_code'] = $real_course_visual_code;
  721. }
  722. elseif ($virtual_courses_exist) {
  723. $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
  724. $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
  725. } else {
  726. //course name remains real course name
  727. $course_info['name'] = $real_course_name;
  728. $course_info['official_code'] = $real_course_visual_code;
  729. }
  730. $return_result['title'] = $course_info['name'];
  731. $return_result['code'] = $course_info['official_code'];
  732. return $return_result;
  733. }
  734. /**
  735. * Create a course title based on all real and virtual courses the user is registered in.
  736. * @param boolean $user_is_registered_in_real_course
  737. * @param string $real_course_name, the title of the real course
  738. * @param array $virtual_course_list, the list of virtual courses
  739. */
  740. public static function create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list) {
  741. $complete_course_name = array();
  742. if ($user_is_registered_in_real_course) {
  743. // Add the real name to the result.
  744. $complete_course_name[] = $real_course_name;
  745. }
  746. // Add course titles of all virtual courses.
  747. foreach ($virtual_course_list as $current_course) {
  748. $complete_course_name[] = $current_course['title'];
  749. }
  750. // 'CombinedCourse' is from course_home language file.
  751. return (($user_is_registered_in_real_course || count($virtual_course_list) > 1) ? get_lang('CombinedCourse').' ' : '').implode(' &amp; ', $complete_course_name);
  752. }
  753. /**
  754. * Create a course code based on all real and virtual courses the user is registered in.
  755. */
  756. public static function create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list) {
  757. $complete_course_code = array();
  758. if ($user_is_registered_in_real_course) {
  759. // Add the real code to the result
  760. $complete_course_code[] = $real_course_code;
  761. }
  762. // Add codes of all virtual courses.
  763. foreach ($virtual_course_list as $current_course) {
  764. $complete_course_code[] = $current_course['visual_code'];
  765. }
  766. return implode(' &amp; ', $complete_course_code);
  767. }
  768. /**
  769. * Return course info array of virtual course
  770. *
  771. * Note this is different from getting information about a real course!
  772. *
  773. * @param $real_course_code, the id of the real course which the virtual course is linked to
  774. * @deprecated virtual courses doesn't exist anymore
  775. */
  776. public static function get_virtual_course_info($real_course_code) {
  777. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  778. WHERE target_course_code = '".Database::escape_string($real_course_code)."'");
  779. $result = array();
  780. while ($virtual_course = Database::fetch_array($sql_result)) {
  781. $result[] = $virtual_course;
  782. }
  783. return $result;
  784. }
  785. /**
  786. * @param string $system_code, the system code of the course
  787. * @return true if the course is a virtual course, false otherwise
  788. * @deprecated virtual courses doesn't exist anymore
  789. */
  790. public static function is_virtual_course_from_system_code($system_code) {
  791. $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  792. WHERE code = '".Database::escape_string($system_code)."'"));
  793. return !empty($result['target_course_code']);
  794. }
  795. /**
  796. * Returns whether the course code given is a visual code
  797. * @param string Visual course code
  798. * @return true if the course is a virtual course, false otherwise
  799. * @deprecated virtual courses doesn't exist anymore
  800. */
  801. public static function is_virtual_course_from_visual_code($visual_code) {
  802. $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  803. WHERE visual_code = '".Database::escape_string($visual_code)."'"));
  804. return !empty($result['target_course_code']);
  805. }
  806. /**
  807. * @return true if the real course has virtual courses that the user is subscribed to, false otherwise
  808. * @deprecated virtual courses doesn't exist anymore
  809. */
  810. public static function has_virtual_courses_from_code($real_course_code, $user_id) {
  811. return count(self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)) > 0;
  812. }
  813. /**
  814. * Return an array of arrays, listing course info of all virtual course
  815. * linked to the real course ID $real_course_code
  816. *
  817. * @param string The id of the real course which the virtual courses are linked to
  818. * @return array List of courses details
  819. * @deprecated virtual courses doesn't exist anymore
  820. */
  821. public static function get_virtual_courses_linked_to_real_course($real_course_code) {
  822. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  823. WHERE target_course_code = '".Database::get_main_table(TABLE_MAIN_COURSE)."'");
  824. $result_array = array();
  825. while ($result = Database::fetch_array($sql_result)) {
  826. $result_array[] = $result;
  827. }
  828. return $result_array;
  829. }
  830. /**
  831. * This function returns the course code of the real course
  832. * to which a virtual course is linked.
  833. *
  834. * @param the course code of the virtual course
  835. * @return the course code of the real course
  836. */
  837. public static function get_target_of_linked_course($virtual_course_code) {
  838. //get info about the virtual course
  839. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  840. WHERE code = '".Database::escape_string($virtual_course_code)."'"));
  841. return $result['target_course_code'];
  842. }
  843. /*
  844. USER FUNCTIONS
  845. */
  846. /**
  847. * Check if user is subscribed inside a course
  848. * @param int User id
  849. * @param string Course code, if this parameter is null, it'll check for all courses
  850. * @param bool True for checking inside sessions too, by default is not checked
  851. * @return bool true if the user is registered in the course, false otherwise
  852. */
  853. public static function is_user_subscribed_in_course($user_id, $course_code = null, $in_a_session = false, $session_id = null) {
  854. $user_id = intval($user_id);
  855. if (empty($session_id)) {
  856. $session_id = api_get_session_id();
  857. } else {
  858. $session_id = intval($session_id);
  859. }
  860. $condition_course = '';
  861. if (isset($course_code)) {
  862. $course_code = Database::escape_string($course_code);
  863. $condition_course = ' AND course_code = "'.$course_code.'" ';
  864. }
  865. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  866. WHERE user_id = $user_id AND relation_type<>".COURSE_RELATION_TYPE_RRHH." $condition_course "));
  867. if (!empty($result)) {
  868. return true; // The user has been registered in this course.
  869. }
  870. if (!$in_a_session) {
  871. return false; // The user has not been registered in this course.
  872. }
  873. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  874. ' WHERE id_user = '.$user_id.' '.$condition_course.' ')) > 0) {
  875. return true;
  876. }
  877. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  878. ' WHERE id_user = '.$user_id.' AND status=2 '.$condition_course.' ')) > 0) {
  879. return true;
  880. }
  881. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION).
  882. ' WHERE id='.$session_id.' AND id_coach='.$user_id)) > 0) {
  883. return true;
  884. }
  885. return false;
  886. }
  887. /**
  888. * Is the user a teacher in the given course?
  889. *
  890. * @param $user_id, the id (int) of the user
  891. * @param $course_code, the course code
  892. *
  893. * @return true if the user is a teacher in the course, false otherwise
  894. */
  895. public static function is_course_teacher($user_id, $course_code) {
  896. if ($user_id != strval(intval($user_id))) {
  897. return false;
  898. }
  899. $sql_result = Database::query('SELECT status FROM '.Database::get_main_table(TABLE_MAIN_COURSE_USER).
  900. ' WHERE course_code="'.Database::escape_string($course_code).'" and user_id="'.$user_id.'"');
  901. if (Database::num_rows($sql_result) > 0) {
  902. return Database::result($sql_result, 0, 'status') == 1;
  903. }
  904. return false;
  905. }
  906. /**
  907. * Is the user subscribed in the real course or linked courses?
  908. *
  909. * @param int the id of the user
  910. * @param array info about the course (comes from course table, see database lib)
  911. *
  912. * @return true if the user is registered in the real course or linked courses, false otherwise
  913. */
  914. public static function is_user_subscribed_in_real_or_linked_course ($user_id, $course_code, $session_id = '') {
  915. if ($user_id != strval(intval($user_id))) {
  916. return false;
  917. }
  918. $course_code = Database::escape_string($course_code);
  919. if ($session_id == '') {
  920. $result = Database::fetch_array(Database::query("SELECT *
  921. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  922. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  923. ON course.code = course_user.course_code
  924. WHERE course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." AND ( course.code = '$course_code' OR target_course_code = '$course_code')"));
  925. return !empty($result);
  926. }
  927. // From here we trust session id.
  928. // Is he/she subscribed to the session's course?
  929. // A user?
  930. if (Database::num_rows(Database::query("SELECT id_user
  931. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  932. WHERE id_session='".$_SESSION['id_session']."'
  933. AND id_user='$user_id'"))) {
  934. return true;
  935. }
  936. // A course coach?
  937. if (Database::num_rows(Database::query("SELECT id_user
  938. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  939. WHERE id_session='".$_SESSION['id_session']."'
  940. AND id_user = '$user_id' AND status = 2
  941. AND course_code='$course_code'"))) {
  942. return true;
  943. }
  944. // A session coach?
  945. if (Database::num_rows(Database::query("SELECT id_coach
  946. FROM ".Database::get_main_table(TABLE_MAIN_SESSION)." AS session
  947. WHERE session.id='".$_SESSION['id_session']."'
  948. AND id_coach='$user_id'"))) {
  949. return true;
  950. }
  951. return false;
  952. }
  953. /**
  954. * Return user info array of all users registered in the specified real or virtual course
  955. * This only returns the users that are registered in this actual course, not linked courses.
  956. *
  957. * @param string $course_code the code of the course
  958. * @param boolean $with_session determines if the course is used in a session or not
  959. * @param integer $session_id the id of the session
  960. * @param string $limit the LIMIT statement of the sql statement
  961. * @param string $order_by the field to order the users by. Valid values are 'lastname', 'firstname', 'username', 'email', 'official_code' OR a part of a SQL statement that starts with ORDER BY ...
  962. * @param int if using the session_id: 0 or 2 (student, coach), if using session_id = 0 STUDENT or COURSEMANAGER
  963. * @return array
  964. */
  965. public static function get_user_list_from_course_code($course_code, $session_id = 0, $limit = '', $order_by = '', $filter_by_status = null) {
  966. // variable initialisation
  967. $session_id = intval($session_id);
  968. $course_code = Database::escape_string($course_code);
  969. $where = array();
  970. // if the $order_by does not contain 'ORDER BY' we have to check if it is a valid field that can be sorted on
  971. if (!strstr($order_by,'ORDER BY')) {
  972. if (!empty($order_by) AND in_array($order_by, array('lastname', 'firstname', 'username', 'email', 'official_code'))) {
  973. $order_by = 'ORDER BY user.'.$order_by;
  974. } else {
  975. $order_by = '';
  976. }
  977. }
  978. $filter_by_status_condition = null;
  979. if (!empty($session_id)) {
  980. $sql = 'SELECT DISTINCT user.user_id, session_course_user.status as status_session, user.* ';
  981. $sql .= ' FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
  982. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).' as session_course_user
  983. ON user.user_id = session_course_user.id_user
  984. AND session_course_user.course_code="'.$course_code.'"
  985. AND session_course_user.id_session = '.$session_id;
  986. $where[] = ' session_course_user.course_code IS NOT NULL ';
  987. // 2 = coach
  988. // 0 = student
  989. if (isset($filter_by_status)) {
  990. $filter_by_status = intval($filter_by_status);
  991. $filter_by_status_condition = " session_course_user.status = $filter_by_status AND ";
  992. }
  993. } else {
  994. $sql = 'SELECT DISTINCT course_rel_user.status as status_rel, user.user_id, course_rel_user.role, course_rel_user.tutor_id, user.* ';
  995. $sql .= ' FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
  996. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_COURSE_USER).' as course_rel_user
  997. ON user.user_id = course_rel_user.user_id AND course_rel_user.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
  998. AND course_rel_user.course_code="'.$course_code.'"';
  999. $where[] = ' course_rel_user.course_code IS NOT NULL ';
  1000. if (isset($filter_by_status) && $filter_by_status != '') {
  1001. $filter_by_status = intval($filter_by_status);
  1002. $filter_by_status_condition = " course_rel_user.status = $filter_by_status AND ";
  1003. }
  1004. }
  1005. $multiple_access_url = api_get_multiple_access_url();
  1006. if ($multiple_access_url) {
  1007. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER).' au ON (au.user_id = user.user_id) ';
  1008. }
  1009. $sql .= ' WHERE '.$filter_by_status_condition.' '.implode(' OR ', $where);
  1010. if ($multiple_access_url) {
  1011. $current_access_url_id = api_get_current_access_url_id();
  1012. $sql .= " AND (access_url_id = $current_access_url_id ) ";
  1013. }
  1014. $sql .= ' '.$order_by.' '.$limit;
  1015. $rs = Database::query($sql);
  1016. $users = array();
  1017. if (Database::num_rows($rs)) {
  1018. while ($user = Database::fetch_array($rs)) {
  1019. $user_info = $user;
  1020. $user_info['status'] = $user['status'];
  1021. if (isset($user['role'])) {
  1022. $user_info['role'] = $user['role'];
  1023. }
  1024. if (isset($user['tutor_id'])) {
  1025. $user_info['tutor_id'] = $user['tutor_id'];
  1026. }
  1027. if (!empty($session_id)) {
  1028. $user_info['status_session'] = $user['status_session'];
  1029. }
  1030. $users[$user['user_id']] = $user_info;
  1031. }
  1032. }
  1033. return $users;
  1034. }
  1035. /**
  1036. * Gets subscribed users in a course or in a course/session
  1037. *
  1038. * @param string $course_code
  1039. * @param int $session_id
  1040. * @return int
  1041. */
  1042. public static function get_users_count_in_course($course_code, $session_id = 0) {
  1043. // variable initialisation
  1044. $session_id = intval($session_id);
  1045. $course_code = Database::escape_string($course_code);
  1046. $sql .= 'SELECT DISTINCT count(*) as count FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
  1047. $where = array();
  1048. if (!empty($session_id)) {
  1049. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).' as session_course_user
  1050. ON user.user_id = session_course_user.id_user
  1051. AND session_course_user.course_code = "'.$course_code.'"
  1052. AND session_course_user.id_session = '.$session_id;
  1053. $where[] = ' session_course_user.course_code IS NOT NULL ';
  1054. } else {
  1055. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_COURSE_USER).' as course_rel_user
  1056. ON user.user_id = course_rel_user.user_id AND course_rel_user.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
  1057. AND course_rel_user.course_code="'.$course_code.'"';
  1058. $where[] = ' course_rel_user.course_code IS NOT NULL ';
  1059. }
  1060. $multiple_access_url = api_get_multiple_access_url();
  1061. if ($multiple_access_url) {
  1062. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER).' au ON (au.user_id = user.user_id) ';
  1063. }
  1064. $sql .= ' WHERE '.implode(' OR ', $where);
  1065. if ($multiple_access_url) {
  1066. $current_access_url_id = api_get_current_access_url_id();
  1067. $sql .= " AND (access_url_id = $current_access_url_id ) ";
  1068. }
  1069. $rs = Database::query($sql);
  1070. $count = 0;
  1071. if (Database::num_rows($rs)) {
  1072. $user = Database::fetch_array($rs);
  1073. $count = $user['count'];
  1074. }
  1075. return $count;
  1076. }
  1077. /**
  1078. * Get a list of coaches of a course and a session
  1079. * @param string Course code
  1080. * @param int Session ID
  1081. * @return array List of users
  1082. */
  1083. public static function get_coach_list_from_course_code($course_code, $session_id) {
  1084. if ($session_id != strval(intval($session_id))) {
  1085. return array();
  1086. }
  1087. $course_code = Database::escape_string($course_code);
  1088. $users = array();
  1089. // We get the coach for the given course in a given session.
  1090. $rs = Database::query('SELECT id_user FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  1091. ' WHERE id_session="'.$session_id.'" AND course_code="'.$course_code.'" AND status = 2');
  1092. while ($user = Database::fetch_array($rs)) {
  1093. $user_info = Database::get_user_info_from_id($user['id_user']);
  1094. $user_info['status'] = $user['status'];
  1095. $user_info['role'] = $user['role'];
  1096. $user_info['tutor_id'] = $user['tutor_id'];
  1097. $user_info['email'] = $user['email'];
  1098. $users[$user['id_user']] = $user_info;
  1099. }
  1100. // We get the session coach.
  1101. $rs = Database::query('SELECT id_coach FROM '.Database::get_main_table(TABLE_MAIN_SESSION).' WHERE id="'.$session_id.'"');
  1102. $session_id_coach = Database::result($rs, 0, 'id_coach');
  1103. $user_info = Database::get_user_info_from_id($session_id_coach);
  1104. $user_info['status'] = $user['status'];
  1105. $user_info['role'] = $user['role'];
  1106. $user_info['tutor_id'] = $user['tutor_id'];
  1107. $user_info['email'] = $user['email'];
  1108. $users[$session_id_coach] = $user_info;
  1109. return $users;
  1110. }
  1111. /**
  1112. * Return user info array of all users registered in the specified real or virtual course
  1113. * This only returns the users that are registered in this actual course, not linked courses.
  1114. *
  1115. * @param string $course_code
  1116. * @param boolean $full list to true if we want sessions students too
  1117. * @return array with user id
  1118. */
  1119. public static function get_student_list_from_course_code($course_code, $with_session = false, $session_id = 0) {
  1120. $session_id = intval($session_id);
  1121. $course_code = Database::escape_string($course_code);
  1122. $students = array();
  1123. if ($session_id == 0) {
  1124. // students directly subscribed to the course
  1125. $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  1126. WHERE course_code = '$course_code' AND status = ".STUDENT;
  1127. $rs = Database::query($sql);
  1128. while ($student = Database::fetch_array($rs)) {
  1129. $students[$student['user_id']] = $student;
  1130. }
  1131. }
  1132. // students subscribed to the course through a session
  1133. if ($with_session) {
  1134. $sql_query = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  1135. WHERE course_code = '$course_code' AND status <> 2";
  1136. if ($session_id != 0) {
  1137. $sql_query .= ' AND id_session = '.$session_id;
  1138. }
  1139. $rs = Database::query($sql_query);
  1140. while($student = Database::fetch_array($rs)) {
  1141. $students[$student['id_user']] = $student;
  1142. }
  1143. }
  1144. return $students;
  1145. }
  1146. /**
  1147. * Return user info array of all teacher-users registered in the specified real or virtual course
  1148. * This only returns the users that are registered in this actual course, not linked courses.
  1149. *
  1150. * @param string $course_code
  1151. * @return array with user id
  1152. */
  1153. public static function get_teacher_list_from_course_code($course_code) {
  1154. $course_code = Database::escape_string($course_code);
  1155. $teachers = array();
  1156. $sql = "SELECT u.user_id, u.lastname, u.firstname, u.email, u.username, u.status
  1157. FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." cu INNER JOIN ".Database::get_main_table(TABLE_MAIN_USER)." u
  1158. ON (cu.user_id = u.user_id)
  1159. WHERE cu.course_code = '$course_code' AND
  1160. cu.status = 1 ";
  1161. $rs = Database::query($sql);
  1162. while ($teacher = Database::fetch_array($rs)) {
  1163. $teachers[$teacher['user_id']] = $teacher;
  1164. }
  1165. return $teachers;
  1166. }
  1167. public static function get_teacher_list_from_course_code_to_string($course_code, $separator = self::USER_SEPARATOR, $add_link_to_profile = false) {
  1168. $teacher_list = self::get_teacher_list_from_course_code($course_code);
  1169. $teacher_string = '';
  1170. $list = array();
  1171. if (!empty($teacher_list)) {
  1172. foreach($teacher_list as $teacher) {
  1173. $teacher_name = api_get_person_name($teacher['firstname'], $teacher['lastname']);
  1174. if ($add_link_to_profile) {
  1175. $url = api_get_path(WEB_AJAX_PATH).'user_manager.ajax.php?a=get_user_popup&resizable=0&height=350&user_id='.$teacher['user_id'];
  1176. $teacher_name = Display::url($teacher_name, $url, array('class' => 'ajax'));
  1177. }
  1178. $list[]= $teacher_name;
  1179. }
  1180. if (!empty($list)) {
  1181. $teacher_string = array_to_string($list, $separator);
  1182. }
  1183. }
  1184. return $teacher_string;
  1185. }
  1186. /**
  1187. * This function returns information about coachs from a course in session
  1188. * @param int - optional, session id
  1189. * @param string - optional, course code
  1190. * @return array - array containing user_id, lastname, firstname, username
  1191. *
  1192. */
  1193. public static function get_coachs_from_course($session_id=0, $course_code='') {
  1194. if (!empty($session_id)) {
  1195. $session_id = intval($session_id);
  1196. } else {
  1197. $session_id = api_get_session_id();
  1198. }
  1199. if (!empty($course_code)) {
  1200. $course_code = Database::escape_string($course_code);
  1201. } else {
  1202. $course_code = api_get_course_id();
  1203. }
  1204. $tbl_user = Database :: get_main_table(TABLE_MAIN_USER);
  1205. $tbl_session_course_user = Database :: get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  1206. $coaches = array();
  1207. $sql = "SELECT u.user_id,u.lastname,u.firstname,u.username FROM $tbl_user u,$tbl_session_course_user scu
  1208. WHERE u.user_id = scu.id_user AND scu.id_session = '$session_id' AND scu.course_code = '$course_code' AND scu.status = 2";
  1209. $rs = Database::query($sql);
  1210. if (Database::num_rows($rs) > 0) {
  1211. while ($row = Database::fetch_array($rs)) {
  1212. $coaches[] = $row;
  1213. }
  1214. return $coaches;
  1215. } else {
  1216. return false;
  1217. }
  1218. }
  1219. public static function get_coachs_from_course_to_string($session_id = 0, $course_code = null, $separator = self::USER_SEPARATOR, $add_link_to_profile = false) {
  1220. $coachs_course = self::get_coachs_from_course($session_id, $course_code);
  1221. $course_coachs = array();
  1222. if (is_array($coachs_course)) {
  1223. foreach ($coachs_course as $coach_course) {
  1224. $coach_name = api_get_person_name($coach_course['firstname'], $coach_course['lastname']);
  1225. if ($add_link_to_profile) {
  1226. $url = api_get_path(WEB_AJAX_PATH).'user_manager.ajax.php?a=get_user_popup&resizable=0&height=350&user_id='.$coach_course['user_id'];
  1227. $coach_name = Display::url($coach_name, $url, array('class' => 'ajax'));
  1228. }
  1229. $course_coachs[] = $coach_name;
  1230. }
  1231. }
  1232. $coaches_to_string = null;
  1233. if (is_array($course_coachs) && count($course_coachs)> 0 ) {
  1234. $coaches_to_string = array_to_string($course_coachs, $separator);
  1235. }
  1236. return $coaches_to_string;
  1237. }
  1238. public static function get_coach_list_from_course_code_to_string($course_code, $session_id) {
  1239. $tutor_data = '';
  1240. if ($session_id != 0) {
  1241. $coaches = self::get_email_of_tutor_to_session($session_id, $course_code);
  1242. $coach_list = array();
  1243. foreach ($coaches as $coach) {
  1244. $coach_list[] = $coach['complete_name'];
  1245. }
  1246. if (!empty($coach_list)) {
  1247. $tutor_data = implode(self::USER_SEPARATOR, $coach_list);
  1248. }
  1249. }
  1250. return $tutor_data;
  1251. }
  1252. /**
  1253. * Return user info array of all users registered in the specified course
  1254. * this includes the users of the course itsel and the users of all linked courses.
  1255. *
  1256. * @param array $course_info
  1257. * @return array with user info
  1258. */
  1259. public static function get_real_and_linked_user_list($course_code, $with_sessions = true, $session_id = 0) {
  1260. //get list of virtual courses
  1261. $virtual_course_list = self::get_virtual_courses_linked_to_real_course($course_code);
  1262. $complete_user_list = array();
  1263. //get users from real course
  1264. $user_list = self::get_user_list_from_course_code($course_code, $session_id);
  1265. foreach ($user_list as $this_user) {
  1266. $complete_user_list[] = $this_user;
  1267. }
  1268. //get users from linked courses
  1269. foreach ($virtual_course_list as $this_course) {
  1270. $course_code = $this_course['code'];
  1271. $user_list = self::get_user_list_from_course_code($course_code, $session_id);
  1272. foreach ($user_list as $this_user) {
  1273. $complete_user_list[] = $this_user;
  1274. }
  1275. }
  1276. return $complete_user_list;
  1277. }
  1278. /**
  1279. * Return an array of arrays, listing course info of all courses in the list
  1280. * linked to the real course $real_course_code, to which the user $user_id is subscribed.
  1281. *
  1282. * @param $user_id, the id (int) of the user
  1283. * @param $real_course_code, the id (char) of the real course
  1284. *
  1285. * @return array of course info arrays
  1286. */
  1287. public static function get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $course_code) {
  1288. $result_array = array();
  1289. if ($user_id != strval(intval($user_id))) {
  1290. return $result_array;
  1291. }
  1292. $course_code = Database::escape_string($course_code);
  1293. $sql = "SELECT *
  1294. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  1295. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  1296. ON course.code = course_user.course_code
  1297. WHERE course.target_course_code = '$course_code' AND course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." ";
  1298. $sql_result = Database::query($sql);
  1299. while ($result = Database::fetch_array($sql_result)) {
  1300. $result_array[] = $result;
  1301. }
  1302. return $result_array;
  1303. }
  1304. /*
  1305. GROUP FUNCTIONS
  1306. */
  1307. /**
  1308. * Get the list of groups from the course
  1309. * @param string Course code
  1310. * @param int Session ID (optional)
  1311. * @return array List of groups info
  1312. */
  1313. public static function get_group_list_of_course($course_code, $session_id = 0) {
  1314. $course_info = Database::get_course_info($course_code);
  1315. $course_id = $course_info['real_id'];
  1316. $group_list = array();
  1317. $session_id != 0 ? $session_condition = ' WHERE g.session_id IN(1,'.intval($session_id).')' : $session_condition = ' WHERE g.session_id = 0';
  1318. $sql = "SELECT g.id, g.name, COUNT(gu.id) userNb
  1319. FROM ".Database::get_course_table(TABLE_GROUP)." AS g
  1320. LEFT JOIN ".Database::get_course_table(TABLE_GROUP_USER)." gu
  1321. ON g.id = gu.group_id
  1322. $session_condition AND
  1323. g.c_id = $course_id
  1324. GROUP BY g.id
  1325. ORDER BY g.name";
  1326. $result = Database::query($sql);
  1327. while ($group_data = Database::fetch_array($result)) {
  1328. $group_list[$group_data['id']] = $group_data;
  1329. }
  1330. return $group_list;
  1331. }
  1332. /**
  1333. * Checks all parameters needed to create a virtual course.
  1334. * If they are all set, the virtual course creation procedure is called.
  1335. *
  1336. * Call this function instead of create_virtual_course
  1337. * @param string Course code
  1338. * @param string Course title
  1339. * @param string Wanted course code
  1340. * @param string Course language
  1341. * @param string Course category
  1342. * @return bool True on success, false on error
  1343. */
  1344. public static function attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
  1345. //better: create parameter list, check the entire list, when false display errormessage
  1346. self::check_parameter_or_fail($real_course_code, 'Unspecified parameter: real course id.');
  1347. self::check_parameter_or_fail($course_title, 'Unspecified parameter: course title.');
  1348. self::check_parameter_or_fail($wanted_course_code, 'Unspecified parameter: wanted course code.');
  1349. self::check_parameter_or_fail($course_language, 'Unspecified parameter: course language.');
  1350. self::check_parameter_or_fail($course_category, 'Unspecified parameter: course category.');
  1351. return self::create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category);
  1352. }
  1353. /**
  1354. * This function creates a virtual course.
  1355. * It assumes all parameters have been checked and are not empty.
  1356. * It checks wether a course with the $wanted_course_code already exists.
  1357. *
  1358. * Users of this library should consider this function private,
  1359. * please call attempt_create_virtual_course instead of this one.
  1360. *
  1361. * note: The virtual course 'owner' id (the first course admin) is set to the CURRENT user id.
  1362. * @param string Course code
  1363. * @param string Course title
  1364. * @param string Wanted course code
  1365. * @param string Course language
  1366. * @param string Course category
  1367. * @return true if the course creation succeeded, false otherwise
  1368. * @todo research: expiration date of a course
  1369. */
  1370. public static function create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
  1371. global $firstExpirationDelay;
  1372. $user_id = api_get_user_id();
  1373. $real_course_info = Database::get_course_info($real_course_code);
  1374. $real_course_code = $real_course_info['system_code'];
  1375. //check: virtual course creation fails if another course has the same
  1376. //code, real or fake.
  1377. if (self::course_code_exists($wanted_course_code)) {
  1378. Display::display_error_message($wanted_course_code.' - '.get_lang('CourseCodeAlreadyExists'));
  1379. return false;
  1380. }
  1381. //add data to course table, course_rel_user
  1382. $course_sys_code = $wanted_course_code;
  1383. $course_screen_code = $wanted_course_code;
  1384. $course_repository = $real_course_info['directory'];
  1385. $course_db_name = $real_course_info['db_name'];
  1386. $responsible_teacher = $real_course_info['tutor_name'];
  1387. $faculty_shortname = $course_category;
  1388. // $course_title = $course_title;
  1389. // $course_language = $course_language;
  1390. $teacher_id = $user_id;
  1391. //HACK ----------------------------------------------------------------
  1392. $expiration_date = time() + $firstExpirationDelay;
  1393. //END HACK ------------------------------------------------------------
  1394. register_course($course_sys_code, $course_screen_code, $course_repository, $course_db_name, $responsible_teacher, $faculty_shortname, $course_title, $course_language, $teacher_id, $expiration_date);
  1395. //above was the normal course creation table update call,
  1396. //now one more thing: fill in the target_course_code field
  1397. Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_COURSE)." SET target_course_code = '$real_course_code'
  1398. WHERE code = '".Database::escape_string($course_sys_code)."' LIMIT 1 ");
  1399. return true;
  1400. }
  1401. /**
  1402. * Delete a course
  1403. * This function deletes a whole course-area from the platform. When the
  1404. * given course is a virtual course, the database and directory will not be
  1405. * deleted.
  1406. * When the given course is a real course, also all virtual courses refering
  1407. * to the given course will be deleted.
  1408. * Considering the fact that we remove all traces of the course in the main
  1409. * database, it makes sense to remove all tracking as well (if stats databases exist)
  1410. * so that a new course created with this code would not use the remains of an older
  1411. * course.
  1412. *
  1413. * @param string The code of the course to delete
  1414. * @todo When deleting a virtual course: unsubscribe users from that virtual
  1415. * course from the groups in the real course if they are not subscribed in
  1416. * that real course.
  1417. * @todo Remove globals
  1418. */
  1419. public static function delete_course($code) {
  1420. global $_configuration;
  1421. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1422. $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1423. $table_course_class = Database::get_main_table(TABLE_MAIN_COURSE_CLASS);
  1424. $table_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  1425. $table_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  1426. $table_course_survey = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY);
  1427. $table_course_survey_question = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION);
  1428. $table_course_survey_question_option= Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION_OPTION);
  1429. $table_stats_hotpots = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);
  1430. $table_stats_attempt = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
  1431. $table_stats_exercises = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
  1432. $table_stats_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
  1433. $table_stats_lastaccess = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
  1434. $table_stats_course_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
  1435. $table_stats_online = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
  1436. $table_stats_default = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
  1437. $table_stats_downloads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DOWNLOADS);
  1438. $table_stats_links = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LINKS);
  1439. $table_stats_uploads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_UPLOADS);
  1440. $code = Database::escape_string($code);
  1441. $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
  1442. $res = Database::query($sql);
  1443. if (Database::num_rows($res) == 0) {
  1444. return;
  1445. }
  1446. $this_course = Database::fetch_array($res);
  1447. self::create_database_dump($code);
  1448. if (!self::is_virtual_course_from_system_code($code)) {
  1449. // If this is not a virtual course, look for virtual courses that depend on this one, if any
  1450. $virtual_courses = self::get_virtual_courses_linked_to_real_course($code);
  1451. foreach ($virtual_courses as $index => $virtual_course) {
  1452. // Unsubscribe all classes from the virtual course
  1453. $sql = "DELETE FROM $table_course_class WHERE course_code='".$virtual_course['code']."'";
  1454. Database::query($sql);
  1455. // Unsubscribe all users from the virtual course
  1456. $sql = "DELETE FROM $table_course_user WHERE course_code='".$virtual_course['code']."'";
  1457. Database::query($sql);
  1458. // Delete the course from the sessions tables
  1459. $sql = "DELETE FROM $table_session_course WHERE course_code='".$virtual_course['code']."'";
  1460. Database::query($sql);
  1461. $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$virtual_course['code']."'";
  1462. Database::query($sql);
  1463. // Delete the course from the survey tables
  1464. $sql = "DELETE FROM $table_course_survey WHERE course_code='".$virtual_course['code']."'";
  1465. Database::query($sql);
  1466. $sql = "DELETE FROM $table_course_survey_user WHERE db_name='".$virtual_course['db_name']."'";
  1467. Database::query($sql);
  1468. $sql = "DELETE FROM $table_course_survey_reminder WHERE db_name='".$virtual_course['db_name']."'";
  1469. Database::query($sql);
  1470. // Delete the course from the stats tables
  1471. $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$virtual_course['code']."'";
  1472. Database::query($sql);
  1473. $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$virtual_course['code']."'";
  1474. Database::query($sql);
  1475. $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$virtual_course['code']."'";
  1476. Database::query($sql);
  1477. $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$virtual_course['code']."'";
  1478. Database::query($sql);
  1479. $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$virtual_course['code']."'";
  1480. Database::query($sql);
  1481. $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$virtual_course['code']."'";
  1482. Database::query($sql);
  1483. $sql = "DELETE FROM $table_stats_online WHERE course = '".$virtual_course['code']."'";
  1484. Database::query($sql);
  1485. $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$virtual_course['code']."'";
  1486. Database::query($sql);
  1487. $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$virtual_course['code']."'";
  1488. Database::query($sql);
  1489. $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$virtual_course['code']."'";
  1490. Database::query($sql);
  1491. $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$virtual_course['code']."'";
  1492. Database::query($sql);
  1493. // Delete the course from the course table
  1494. $sql = "DELETE FROM $table_course WHERE code='".$virtual_course['code']."'";
  1495. Database::query($sql);
  1496. }
  1497. $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
  1498. $res = Database::query($sql);
  1499. $course = Database::fetch_array($res);
  1500. $course_tables = get_course_tables();
  1501. //Cleaning c_x tables
  1502. if (!empty($course['id'])) {
  1503. foreach($course_tables as $table) {
  1504. $table = Database::get_course_table($table);
  1505. $sql = "DELETE FROM $table WHERE c_id = {$course['id']} ";
  1506. Database::query($sql);
  1507. }
  1508. }
  1509. $course_dir = api_get_path(SYS_COURSE_PATH).$course['directory'];
  1510. $archive_dir = api_get_path(SYS_ARCHIVE_PATH).$course['directory'].'_'.time();
  1511. if (is_dir($course_dir)) {
  1512. rename($course_dir, $archive_dir);
  1513. }
  1514. }
  1515. // Unsubscribe all classes from the course
  1516. $sql = "DELETE FROM $table_course_class WHERE course_code='".$code."'";
  1517. Database::query($sql);
  1518. // Unsubscribe all users from the course
  1519. $sql = "DELETE FROM $table_course_user WHERE course_code='".$code."'";
  1520. Database::query($sql);
  1521. // Delete the course from the sessions tables
  1522. $sql = "DELETE FROM $table_session_course WHERE course_code='".$code."'";
  1523. Database::query($sql);
  1524. $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$code."'";
  1525. Database::query($sql);
  1526. $sql = 'SELECT survey_id FROM '.$table_course_survey.' WHERE course_code="'.$code.'"';
  1527. $result_surveys = Database::query($sql);
  1528. while($surveys = Database::fetch_array($result_surveys)) {
  1529. $survey_id = $surveys[0];
  1530. $sql = 'DELETE FROM '.$table_course_survey_question.' WHERE survey_id="'.$survey_id.'"';
  1531. Database::query($sql);
  1532. $sql = 'DELETE FROM '.$table_course_survey_question_option.' WHERE survey_id="'.$survey_id.'"';
  1533. Database::query($sql);
  1534. $sql = 'DELETE FROM '.$table_course_survey.' WHERE survey_id="'.$survey_id.'"';
  1535. Database::query($sql);
  1536. }
  1537. // Delete the course from the stats tables
  1538. $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$code."'";
  1539. Database::query($sql);
  1540. $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$code."'";
  1541. Database::query($sql);
  1542. $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$code."'";
  1543. Database::query($sql);
  1544. $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$code."'";
  1545. Database::query($sql);
  1546. $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$code."'";
  1547. Database::query($sql);
  1548. $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$code."'";
  1549. Database::query($sql);
  1550. $sql = "DELETE FROM $table_stats_online WHERE course = '".$code."'";
  1551. Database::query($sql);
  1552. $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$code."'";
  1553. Database::query($sql);
  1554. $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$code."'";
  1555. Database::query($sql);
  1556. $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$code."'";
  1557. Database::query($sql);
  1558. $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$code."'";
  1559. Database::query($sql);
  1560. global $_configuration;
  1561. if ($_configuration['multiple_access_urls']) {
  1562. require_once api_get_path(LIBRARY_PATH).'urlmanager.lib.php';
  1563. $url_id = 1;
  1564. if (api_get_current_access_url_id() != -1) {
  1565. $url_id = api_get_current_access_url_id();
  1566. }
  1567. UrlManager::delete_url_rel_course($code, $url_id);
  1568. }
  1569. // Delete the course from the database
  1570. $sql = "DELETE FROM $table_course WHERE code='".$code."'";
  1571. Database::query($sql);
  1572. // delete extra course fields
  1573. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1574. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1575. $sql = "SELECT distinct field_id FROM $t_cfv WHERE course_code = '$code'";
  1576. $res_field_ids = @Database::query($sql);
  1577. while($row_field_id = Database::fetch_row($res_field_ids)){
  1578. $field_ids[] = $row_field_id[0];
  1579. }
  1580. //delete from table_course_field_value from a given course_code
  1581. $sql_course_field_value = "DELETE FROM $t_cfv WHERE course_code = '$code'";
  1582. @Database::query($sql_course_field_value);
  1583. $sql = "SELECT distinct field_id FROM $t_cfv";
  1584. $res_field_all_ids = @Database::query($sql);
  1585. while($row_field_all_id = Database::fetch_row($res_field_all_ids)){
  1586. $field_all_ids[] = $row_field_all_id[0];
  1587. }
  1588. if (is_array($field_ids) && count($field_ids) > 0) {
  1589. foreach ($field_ids as $field_id) {
  1590. // check if field id is used into table field value
  1591. if (is_array($field_all_ids)) {
  1592. if (in_array($field_id, $field_all_ids)) {
  1593. continue;
  1594. } else {
  1595. $sql_course_field = "DELETE FROM $t_cf WHERE id = '$field_id'";
  1596. Database::query($sql_course_field);
  1597. }
  1598. }
  1599. }
  1600. }
  1601. // Add event to system log
  1602. $user_id = api_get_user_id();
  1603. event_system(LOG_COURSE_DELETE, LOG_COURSE_CODE, $code, api_get_utc_datetime(), $user_id, $code);
  1604. }
  1605. /**
  1606. * Creates a file called mysql_dump.sql in the course folder
  1607. * @param $course_code The code of the course
  1608. * @todo Implementation for single database
  1609. */
  1610. public static function create_database_dump($course_code) {
  1611. global $_configuration;
  1612. if ($_configuration['single_database']) {
  1613. return;
  1614. }
  1615. $sql_dump = '';
  1616. $course_code = Database::escape_string($course_code);
  1617. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1618. $sql = "SELECT * FROM $table_course WHERE code = '$course_code'";
  1619. $res = Database::query($sql);
  1620. $course = Database::fetch_array($res);
  1621. $course_tables = get_course_tables();
  1622. if (!empty($course['id'])) {
  1623. //Cleaning c_x tables
  1624. foreach($course_tables as $table) {
  1625. $table = Database::get_course_table($table);
  1626. $sql = "SELECT * FROM $table WHERE c_id = {$course['id']} ";
  1627. $res_table = Database::query($sql);
  1628. while ($row = Database::fetch_array($res_table, 'ASSOC')) {
  1629. $row_to_save = array();
  1630. foreach ($row as $key => $value) {
  1631. $row_to_save[$key] = $key."='".Database::escape_string($row[$key])."'";
  1632. }
  1633. $sql_dump .= "\nINSERT INTO $table SET ".implode(', ', $row_to_save).';';
  1634. }
  1635. }
  1636. }
  1637. if (is_dir(api_get_path(SYS_COURSE_PATH).$course['directory'])) {
  1638. $file_name = api_get_path(SYS_COURSE_PATH).$course['directory'].'/mysql_dump.sql';
  1639. $handle = fopen($file_name, 'a+');
  1640. if ($handle !== false) {
  1641. fwrite($handle, $sql_dump);
  1642. fclose($handle);
  1643. } else {
  1644. //TODO trigger exception in a try-catch
  1645. }
  1646. }
  1647. }
  1648. /**
  1649. * Sort courses for a specific user ??
  1650. * @param int User ID
  1651. * @param string Course code
  1652. * @return int Minimum course order
  1653. * @todo Review documentation
  1654. */
  1655. public static function userCourseSort($user_id, $course_code) {
  1656. if ($user_id != strval(intval($user_id))) {
  1657. return false;
  1658. }
  1659. $course_code = Database::escape_string($course_code);
  1660. $TABLECOURSE = Database::get_main_table(TABLE_MAIN_COURSE);
  1661. $TABLECOURSUSER = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1662. $course_title = Database::result(Database::query('SELECT title FROM '.$TABLECOURSE.
  1663. ' WHERE code="'.$course_code.'"'), 0, 0);
  1664. $result = Database::query('SELECT course.code as code, course.title as title, cu.sort as sort FROM '.$TABLECOURSUSER.' as cu, '.$TABLECOURSE.' as course
  1665. WHERE course.code = cu.course_code
  1666. AND user_id = "'.$user_id.'"
  1667. AND cu.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
  1668. AND user_course_cat=0 ORDER BY cu.sort');
  1669. $course_title_precedent = '';
  1670. $counter = 0;
  1671. $course_found = false;
  1672. $course_sort = 1;
  1673. while ($courses = Database::fetch_array($result)){
  1674. if ($course_title_precedent == '') {
  1675. $course_title_precedent = $courses['title'];
  1676. }
  1677. if (api_strcasecmp($course_title_precedent, $course_title) < 0) {
  1678. $course_found = true;
  1679. $course_sort = $courses['sort'];
  1680. if ($counter == 0) {
  1681. $sql = 'UPDATE '.$TABLECOURSUSER.' SET sort = sort+1 WHERE user_id= "'.$user_id.'" AND relation_type<>'.COURSE_RELATION_TYPE_RRHH.' AND user_course_cat="0" AND sort > "'.$course_sort.'"';
  1682. $course_sort++;
  1683. } else {
  1684. $sql = 'UPDATE '.$TABLECOURSUSER.' SET sort = sort+1 WHERE user_id= "'.$user_id.'" AND relation_type<>'.COURSE_RELATION_TYPE_RRHH.' AND user_course_cat="0" AND sort >= "'.$course_sort.'"';
  1685. }
  1686. Database::query($sql);
  1687. break;
  1688. } else {
  1689. $course_title_precedent = $courses['title'];
  1690. }
  1691. $counter++;
  1692. }
  1693. // We must register the course in the beginning of the list
  1694. if (Database::num_rows($result) > 0 && !$course_found) {
  1695. $course_sort = Database::result(Database::query('SELECT min(sort) as min_sort FROM '.$TABLECOURSUSER.
  1696. ' WHERE user_id="'.$user_id.'" AND user_course_cat="0"'), 0, 0);
  1697. Database::query('UPDATE '.$TABLECOURSUSER.' SET sort = sort+1
  1698. WHERE user_id= "'.$user_id.'" AND user_course_cat="0"');
  1699. }
  1700. return $course_sort;
  1701. }
  1702. /**
  1703. * create recursively all categories as option of the select passed in paramater.
  1704. *
  1705. * @param object $select_element the quickform select where the options will be added
  1706. * @param string $category_selected_code the option value to select by default (used mainly for edition of courses)
  1707. * @param string $parent_code the parent category of the categories added (default=null for root category)
  1708. * @param string $padding the indent param (you shouldn't indicate something here)
  1709. */
  1710. public static function select_and_sort_categories($select_element, $category_selected_code = '', $parent_code = null , $padding = '') {
  1711. $sql = "SELECT code, name, auth_course_child, auth_cat_child
  1712. FROM ".Database::get_main_table(TABLE_MAIN_CATEGORY)."
  1713. WHERE parent_id ".(is_null($parent_code) ? "IS NULL" : "='".Database::escape_string($parent_code)."'")."
  1714. ORDER BY code";
  1715. $res = Database::query($sql);
  1716. while ($cat = Database::fetch_array($res)) {
  1717. $params = $cat['auth_course_child'] == 'TRUE' ? '' : 'disabled';
  1718. $params .= ($cat['code'] == $category_selected_code) ? ' selected' : '';
  1719. $select_element->addOption($padding.'('.$cat['code'].') '.$cat['name'], $cat['code'], $params);
  1720. if ($cat['auth_cat_child']) {
  1721. self::select_and_sort_categories($select_element, $category_selected_code, $cat['code'], $padding.' - ');
  1722. }
  1723. }
  1724. }
  1725. /**
  1726. * check if course exists
  1727. * @param string course_code
  1728. * @param string whether to accept virtual course codes or not
  1729. * @return true if exists, false else
  1730. */
  1731. public static function course_exists($course_code, $accept_virtual = false) {
  1732. if ($accept_virtual === true) {
  1733. $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'" OR visual_code="'.Database::escape_string($course_code).'"';
  1734. } else {
  1735. $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'"';
  1736. }
  1737. return Database::num_rows(Database::query($sql));
  1738. }
  1739. /**
  1740. * Send an email to tutor after the auth-suscription of a student in your course
  1741. * @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
  1742. * @param int $user_id the id of the user
  1743. * @param string $course_code the course code
  1744. * @param string $send_to_tutor_also
  1745. * @return string we return the message that is displayed when the action is succesfull
  1746. */
  1747. public static function email_to_tutor($user_id, $course_code, $send_to_tutor_also = false) {
  1748. if ($user_id != strval(intval($user_id))) {
  1749. return false;
  1750. }
  1751. $course_code = Database::escape_string($course_code);
  1752. $student = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1753. WHERE user_id='".$user_id."'"));
  1754. $information = self::get_course_information($course_code);
  1755. $name_course = $information['title'];
  1756. $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." WHERE course_code='".$course_code."'";
  1757. // TODO: Ivan: This is a mistake, please, have a look at it. Intention here is diffcult to be guessed.
  1758. //if ($send_to_tutor_also = true)
  1759. // Proposed change:
  1760. if ($send_to_tutor_also) {
  1761. //
  1762. $sql .= " AND tutor_id=1";
  1763. } else {
  1764. $sql .= " AND status=1";
  1765. }
  1766. $result = Database::query($sql);
  1767. while ($row = Database::fetch_array($result)) {
  1768. $tutor = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1769. WHERE user_id='".$row['user_id']."'"));
  1770. $emailto = $tutor['email'];
  1771. $emailsubject = get_lang('NewUserInTheCourse').': '.$name_course;
  1772. $emailbody = get_lang('Dear').': '. api_get_person_name($tutor['firstname'], $tutor['lastname'])."\n";
  1773. $emailbody .= get_lang('MessageNewUserInTheCourse').': '.$name_course."\n";
  1774. $emailbody .= get_lang('UserName').': '.$student['username']."\n";
  1775. if (api_is_western_name_order()) {
  1776. $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
  1777. $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
  1778. } else {
  1779. $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
  1780. $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
  1781. }
  1782. $emailbody .= get_lang('Email').': '.$student['email']."\n\n";
  1783. $recipient_name = api_get_person_name($tutor['firstname'], $tutor['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
  1784. $sender_name = api_get_person_name(api_get_setting('administratorName'), api_get_setting('administratorSurname'), null, PERSON_NAME_EMAIL_ADDRESS);
  1785. $email_admin = api_get_setting('emailAdministrator');
  1786. @api_mail($recipient_name, $emailto, $emailsubject, $emailbody, $sender_name,$email_admin);
  1787. }
  1788. }
  1789. public static function get_special_course_list() {
  1790. $tbl_course_field = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD);
  1791. $tbl_course_field_value = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1792. //we filter the courses from the URL
  1793. $join_access_url = $where_access_url='';
  1794. if (api_get_multiple_access_url()) {
  1795. $access_url_id = api_get_current_access_url_id();
  1796. if ($access_url_id != -1) {
  1797. $tbl_url_course = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  1798. $join_access_url= "LEFT JOIN $tbl_url_course url_rel_course ON url_rel_course.course_code= tcfv.course_code ";
  1799. $where_access_url =" AND access_url_id = $access_url_id ";
  1800. }
  1801. }
  1802. // get course list auto-register
  1803. $sql = "SELECT DISTINCT(tcfv.course_code) FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf
  1804. ON tcfv.field_id = tcf.id $join_access_url
  1805. WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 $where_access_url";
  1806. $special_course_result = Database::query($sql);
  1807. $special_course_list = array();
  1808. if (Database::num_rows($special_course_result)>0) {
  1809. $special_course_list = array();
  1810. while ($result_row = Database::fetch_array($special_course_result)) {
  1811. $special_course_list[] = $result_row['course_code'];
  1812. }
  1813. }
  1814. return $special_course_list;
  1815. }
  1816. /**
  1817. * Get list of courses for a given user
  1818. * @param int user ID
  1819. * @param boolean Whether to include courses from session or not
  1820. * @return array List of codes and db names
  1821. * @author isaac flores paz
  1822. */
  1823. public static function get_courses_list_by_user_id($user_id, $include_sessions = false) {
  1824. $user_id = intval($user_id);
  1825. $course_list = array();
  1826. $codes = array();
  1827. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1828. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1829. $tbl_user_course_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  1830. $special_course_list = self::get_special_course_list();
  1831. $with_special_courses = $without_special_courses = '';
  1832. if (!empty($special_course_list)) {
  1833. $sc_string = '"'.implode('","',$special_course_list).'"';
  1834. $with_special_courses = ' course.code IN ('.$sc_string.')';
  1835. $without_special_courses = ' AND course.code NOT IN ('.$sc_string.')';
  1836. }
  1837. if (!empty($with_special_courses)) {
  1838. $sql = "SELECT DISTINCT(course.code), course.id as real_id
  1839. FROM ".$tbl_course_user." course_rel_user
  1840. LEFT JOIN ".$tbl_course." course
  1841. ON course.code = course_rel_user.course_code
  1842. LEFT JOIN ".$tbl_user_course_category." user_course_category
  1843. ON course_rel_user.user_course_cat = user_course_category.id
  1844. WHERE $with_special_courses
  1845. GROUP BY course.code
  1846. ORDER BY user_course_category.sort,course.title,course_rel_user.sort ASC";
  1847. $rs_special_course = Database::query($sql);
  1848. if (Database::num_rows($rs_special_course) > 0) {
  1849. while ($result_row = Database::fetch_array($rs_special_course)) {
  1850. $result_row['special_course'] = 1;
  1851. $course_list[] = $result_row;
  1852. $codes[] = $result_row['real_id'];
  1853. }
  1854. }
  1855. }
  1856. // get course list not auto-register. Use Distinct to avoid multiple
  1857. // entries when a course is assigned to a HRD (DRH) as watcher
  1858. $sql = "SELECT DISTINCT(course.code), course.id as real_id
  1859. FROM $tbl_course course
  1860. INNER JOIN $tbl_course_user cru ON course.code=cru.course_code
  1861. WHERE cru.user_id='$user_id' $without_special_courses";
  1862. $result = Database::query($sql);
  1863. if (Database::num_rows($result)) {
  1864. while ($row = Database::fetch_array($result, 'ASSOC')) {
  1865. $course_list[] = $row;
  1866. $codes[] = $row['code'];
  1867. }
  1868. }
  1869. if ($include_sessions === true) {
  1870. $r = Database::query("SELECT DISTINCT(c.code), c.id as real_id
  1871. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." s, ".Database::get_main_table(TABLE_MAIN_COURSE)." c
  1872. WHERE id_user = $user_id AND s.course_code=c.code");
  1873. while ($row = Database::fetch_array($r, 'ASSOC')) {
  1874. if (!in_array($row['real_id'], $codes)) {
  1875. $course_list[] = $row;
  1876. }
  1877. }
  1878. }
  1879. return $course_list;
  1880. }
  1881. /**
  1882. * Get course ID from a given course directory name
  1883. * @param string Course directory (without any slash)
  1884. * @return string Course code, or false if not found
  1885. */
  1886. public static function get_course_id_from_path($path) {
  1887. $path = Database::escape_string(str_replace('.', '', str_replace('/', '', $path)));
  1888. $res = Database::query("SELECT code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  1889. WHERE directory LIKE BINARY '$path'");
  1890. if ($res === false) {
  1891. return false;
  1892. }
  1893. if (Database::num_rows($res) != 1) {
  1894. return false;
  1895. }
  1896. $row = Database::fetch_array($res);
  1897. return $row['code'];
  1898. }
  1899. /**
  1900. * Get course code(s) from visual code
  1901. * @param string Visual code
  1902. * @return array List of codes for the given visual code
  1903. */
  1904. public static function get_courses_info_from_visual_code($code) {
  1905. $result = array();
  1906. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  1907. WHERE visual_code = '".Database::escape_string($code)."'");
  1908. while ($virtual_course = Database::fetch_array($sql_result)) {
  1909. $result[] = $virtual_course;
  1910. }
  1911. return $result;
  1912. }
  1913. /**
  1914. * Get emails of tutors to course
  1915. * @param string Visual code
  1916. * @return array List of emails of tutors to course
  1917. * @author @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
  1918. * */
  1919. public static function get_emails_of_tutors_to_course($code) {
  1920. $list = array();
  1921. $res = Database::query("SELECT user_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  1922. WHERE course_code='".Database::escape_string($code)."' AND status=1");
  1923. while ($list_users = Database::fetch_array($res)) {
  1924. $result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1925. WHERE user_id=".$list_users['user_id']);
  1926. while ($row_user = Database::fetch_array($result)){
  1927. $name_teacher = api_get_person_name($row_user['firstname'], $row_user['lastname']);
  1928. $list[] = array($row_user['email'] => $name_teacher);
  1929. }
  1930. }
  1931. return $list;
  1932. }
  1933. /**
  1934. * Get coachs' emails by session
  1935. * @param int session id
  1936. * @param string course code
  1937. * @return array array(email => name_tutor) by coach
  1938. * @author Carlos Vargas <carlos.vargas@dokeos.com>
  1939. */
  1940. public static function get_email_of_tutor_to_session($session_id, $course_code) {
  1941. $tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  1942. $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
  1943. $coachs_emails = array();
  1944. $course_code = Database::escape_string($course_code);
  1945. $session_id = intval($session_id);
  1946. $sql = "SELECT id_user FROM $tbl_session_course_user WHERE id_session='$session_id' AND course_code='$course_code' AND status =2";
  1947. $rs = Database::query($sql);
  1948. if (Database::num_rows($rs) > 0) {
  1949. $user_ids = array();
  1950. while ($row = Database::fetch_array($rs)) {
  1951. $user_ids[] = $row['id_user'];
  1952. }
  1953. $sql = "SELECT firstname, lastname, email FROM $tbl_user WHERE user_id IN (".implode(",",$user_ids).")";
  1954. $rs_user = Database::query($sql);
  1955. while ($row_emails = Database::fetch_array($rs_user)) {
  1956. //$name_tutor = api_get_person_name($row_emails['firstname'], $row_emails['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
  1957. $mail_tutor = array('email' => $row_emails['email'], 'complete_name' => api_get_person_name($row_emails['firstname'], $row_emails['lastname']));
  1958. $coachs_emails[] = $mail_tutor;
  1959. }
  1960. }
  1961. return $coachs_emails;
  1962. }
  1963. /**
  1964. * Creates a new extra field for a given course
  1965. * @param string Field's internal variable name
  1966. * @param int Field's type
  1967. * @param string Field's language var name
  1968. * @return int new extra field id
  1969. */
  1970. public static function create_course_extra_field($fieldvarname, $fieldtype, $fieldtitle) {
  1971. // database table definition
  1972. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1973. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1974. $fieldvarname = Database::escape_string($fieldvarname);
  1975. $fieldtitle = Database::escape_string($fieldtitle);
  1976. $fieldtype = (int)$fieldtype;
  1977. $time = time();
  1978. $sql_field = "SELECT id FROM $t_cf WHERE field_variable = '$fieldvarname'";
  1979. $res_field = Database::query($sql_field);
  1980. $r_field = Database::fetch_row($res_field);
  1981. if (Database::num_rows($res_field) > 0) {
  1982. return $r_field[0];
  1983. }
  1984. // save new fieldlabel into course_field table
  1985. $sql = "SELECT MAX(field_order) FROM $t_cf";
  1986. $res = Database::query($sql);
  1987. $order = 0;
  1988. if (Database::num_rows($res) > 0) {
  1989. $row = Database::fetch_row($res);
  1990. $order = $row[0] + 1;
  1991. }
  1992. $sql = "INSERT INTO $t_cf
  1993. SET field_type = '$fieldtype',
  1994. field_variable = '$fieldvarname',
  1995. field_display_text = '$fieldtitle',
  1996. field_order = '$order',
  1997. tms = FROM_UNIXTIME($time)";
  1998. Database::query($sql);
  1999. return Database::insert_id();
  2000. }
  2001. /**
  2002. * Updates course attribute. Note that you need to check that your attribute is valid before you use this function
  2003. *
  2004. * @param int Course id
  2005. * @param string Attribute name
  2006. * @param string Attribute value
  2007. * @return bool True if attribute was successfully updated, false if course was not found or attribute name is invalid
  2008. */
  2009. public static function update_attribute($id, $name, $value) {
  2010. $id = (int)$id;
  2011. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  2012. $sql = "UPDATE $table SET $name = '".Database::escape_string($value)."' WHERE id = '$id';";
  2013. return Database::query($sql);
  2014. }
  2015. /**
  2016. * Update course attributes. Will only update attributes with a non-empty value. Note that you NEED to check that your attributes are valid before using this function
  2017. *
  2018. * @param int Course id
  2019. * @param array Associative array with field names as keys and field values as values
  2020. * @return bool True if update was successful, false otherwise
  2021. */
  2022. public static function update_attributes($id, $attributes) {
  2023. $id = (int)$id;
  2024. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  2025. $sql = "UPDATE $table SET ";
  2026. $i = 0;
  2027. foreach($attributes as $name => $value) {
  2028. if($value != '') {
  2029. if($i > 0) {
  2030. $sql .= ", ";
  2031. }
  2032. $sql .= " $name = '".Database::escape_string($value)."'";
  2033. $i++;
  2034. }
  2035. }
  2036. $sql .= " WHERE id = '$id';";
  2037. return Database::query($sql);
  2038. }
  2039. /**
  2040. * Update an extra field value for a given course
  2041. * @param integer Course ID
  2042. * @param string Field variable name
  2043. * @param string Field value
  2044. * @return boolean true if field updated, false otherwise
  2045. */
  2046. public static function update_course_extra_field_value($course_code, $fname, $fvalue = '') {
  2047. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2048. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2049. $fname = Database::escape_string($fname);
  2050. $course_code = Database::escape_string($course_code);
  2051. $fvalues = '';
  2052. if (is_array($fvalue)) {
  2053. foreach ($fvalue as $val) {
  2054. $fvalues .= Database::escape_string($val).';';
  2055. }
  2056. if (!empty($fvalues)) {
  2057. $fvalues = substr($fvalues, 0, -1);
  2058. }
  2059. } else {
  2060. $fvalues = Database::escape_string($fvalue);
  2061. }
  2062. $sqlcf = "SELECT * FROM $t_cf WHERE field_variable='$fname'";
  2063. $rescf = Database::query($sqlcf);
  2064. if (Database::num_rows($rescf) == 1) {
  2065. // Ok, the field exists
  2066. // Check if enumerated field, if the option is available
  2067. $rowcf = Database::fetch_array($rescf);
  2068. $tms = time();
  2069. $sqlcfv = "SELECT * FROM $t_cfv WHERE course_code = '$course_code' AND field_id = '".$rowcf['id']."' ORDER BY id";
  2070. $rescfv = Database::query($sqlcfv);
  2071. $n = Database::num_rows($rescfv);
  2072. if ($n > 1) {
  2073. //problem, we already have to values for this field and user combination - keep last one
  2074. while ($rowcfv = Database::fetch_array($rescfv)) { // See the TODO note below.
  2075. if ($n > 1) {
  2076. $sqld = "DELETE FROM $t_cfv WHERE id = ".$rowcfv['id'];
  2077. $resd = Database::query($sqld);
  2078. $n--;
  2079. }
  2080. $rowcfv = Database::fetch_array($rescfv);
  2081. if ($rowcfv['field_value'] != $fvalues) {
  2082. $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
  2083. $resu = Database::query($sqlu);
  2084. return ($resu ? true : false);
  2085. }
  2086. return true; // TODO: Sure exit from the function occures in this "while" cycle. Logic should checked. Maybe "if" instead of "while"? It is not clear...
  2087. }
  2088. } elseif ($n == 1) {
  2089. //we need to update the current record
  2090. $rowcfv = Database::fetch_array($rescfv);
  2091. if ($rowcfv['field_value'] != $fvalues) {
  2092. $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
  2093. //error_log('UM::update_extra_field_value: '.$sqlu);
  2094. $resu = Database::query($sqlu);
  2095. return ($resu ? true : false);
  2096. }
  2097. return true;
  2098. } else {
  2099. $sqli = "INSERT INTO $t_cfv (course_code,field_id,field_value,tms) " .
  2100. "VALUES ('$course_code',".$rowcf['id'].",'$fvalues',FROM_UNIXTIME($tms))";
  2101. //error_log('UM::update_extra_field_value: '.$sqli);
  2102. $resi = Database::query($sqli);
  2103. return ($resi ? true : false);
  2104. }
  2105. } else {
  2106. return false; //field not found
  2107. }
  2108. }
  2109. /**
  2110. * Get the course id of an course by the database name
  2111. * @param string The database name
  2112. * @return string The course id
  2113. */
  2114. public static function get_course_id_by_database_name($db_name) {
  2115. return Database::result(Database::query('SELECT code FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
  2116. ' WHERE db_name="'.Database::escape_string($db_name).'"'), 0, 'code');
  2117. }
  2118. public static function get_session_category_id_by_session_id($session_id) {
  2119. return Database::result(Database::query('SELECT sc.id session_category
  2120. FROM '.Database::get_main_table(TABLE_MAIN_SESSION_CATEGORY).' sc
  2121. INNER JOIN '.Database::get_main_table(TABLE_MAIN_SESSION).' s
  2122. ON sc.id=s.session_category_id WHERE s.id="'.Database::escape_string($session_id).'"'),
  2123. 0, 'session_category');
  2124. }
  2125. /**
  2126. * Get the course id of an course by the database name
  2127. * @param string The database name
  2128. * @return string The course id
  2129. */
  2130. public static function get_course_extra_field_list($code) {
  2131. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2132. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2133. $sql_field = "SELECT id, field_type, field_variable, field_display_text, field_default_value
  2134. FROM $tbl_course_field WHERE field_visible = '1' ";
  2135. $res_field = Database::query($sql_field);
  2136. $extra_fields = array();
  2137. while($rowcf = Database::fetch_array($res_field)) {
  2138. $extra_field_id = $rowcf['id'];
  2139. $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '$extra_field_id' ";
  2140. $res_field_value = Database::query($sql_field_value);
  2141. if(Database::num_rows($res_field_value) > 0 ) {
  2142. $r_field_value = Database::fetch_row($res_field_value);
  2143. $rowcf['extra_field_value'] = $r_field_value[0];
  2144. }
  2145. $extra_fields[] = $rowcf;
  2146. }
  2147. return $extra_fields;
  2148. }
  2149. /**
  2150. * Gets the value of a course extra field. Returns null if it was not found
  2151. *
  2152. * @param string Name of the extra field
  2153. * @param string Course code
  2154. * @return string Value
  2155. */
  2156. public static function get_course_extra_field_value($field_name, $code) {
  2157. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2158. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2159. $sql = "SELECT id FROM $tbl_course_field WHERE field_visible = '1' AND field_variable = '$field_name';";
  2160. $res = Database::query($sql);
  2161. $row = Database::fetch_object($res);
  2162. if(!$row) {
  2163. return null;
  2164. } else {
  2165. $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '{$row->id}';";
  2166. $res_field_value = Database::query($sql_field_value);
  2167. $row_field_value = Database::fetch_object($res_field_value);
  2168. if(!$row_field_value) {
  2169. return null;
  2170. } else {
  2171. return $row_field_value['field_value'];
  2172. }
  2173. }
  2174. }
  2175. /**
  2176. * Get the database name of a course by the code
  2177. * @param string The course code
  2178. * @return string The database name
  2179. */
  2180. public static function get_name_database_course($course_code) {
  2181. return Database::result(Database::query('SELECT db_name FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
  2182. ' WHERE code="'.Database::escape_string($course_code).'"'), 0, 'db_name');
  2183. }
  2184. /**
  2185. * Lists details of the course description
  2186. * @param array The course description
  2187. * @param string The encoding
  2188. * @param bool If true is displayed if false is hidden
  2189. * @return string The course description in html
  2190. */
  2191. public static function get_details_course_description_html($descriptions, $charset, $action_show = true) {
  2192. if (isset($descriptions) && count($descriptions) > 0) {
  2193. $data = '';
  2194. foreach ($descriptions as $id => $description) {
  2195. $data .= '<div class="sectiontitle">';
  2196. if (api_is_allowed_to_edit() && $action_show) {
  2197. //delete
  2198. $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;action=delete&amp;description_id='.$description->id.'" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'), ENT_QUOTES, $charset)).'\')) return false;">';
  2199. $data .= Display::return_icon('delete.gif', get_lang('Delete'), array('style' => 'vertical-align:middle;float:right;'));
  2200. $data .= '</a> ';
  2201. //edit
  2202. $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;description_id='.$description->id.'">';
  2203. $data .= Display::return_icon('edit.png', get_lang('Edit'), array('style' => 'vertical-align:middle;float:right; padding-right:4px;'), ICON_SIZE_SMALL);
  2204. $data .= '</a> ';
  2205. }
  2206. $data .= $description->title;
  2207. $data .= '</div>';
  2208. $data .= '<div class="sectioncomment">';
  2209. $data .= text_filter($description->content);
  2210. $data .= '</div>';
  2211. }
  2212. } else {
  2213. $data .= '<em>'.get_lang('ThisCourseDescriptionIsEmpty').'</em>';
  2214. }
  2215. return $data;
  2216. }
  2217. /**
  2218. * Returns the details of a course category
  2219. *
  2220. * @param string Category code
  2221. * @return array Course category
  2222. */
  2223. public static function get_course_category($code) {
  2224. $table_categories = Database::get_main_table(TABLE_MAIN_CATEGORY);
  2225. $sql = "SELECT * FROM $table_categories WHERE code = '$code';";
  2226. return Database::fetch_array(Database::query($sql));
  2227. }
  2228. /*
  2229. ==============================================================================
  2230. DEPRECATED METHODS
  2231. ==============================================================================
  2232. */
  2233. /**
  2234. * This code creates a select form element to let the user
  2235. * choose a real course to link to.
  2236. *
  2237. * A good non-display library should not use echo statements, but just return text/html
  2238. * so users of the library can choose when to display.
  2239. *
  2240. * We display the course code, but internally store the course id.
  2241. *
  2242. * @param boolean $has_size, true the select tag gets a size element, false it stays a dropdownmenu
  2243. * @param boolean $only_current_user_courses, true only the real courses of which the
  2244. * current user is course admin are displayed, false all real courses are shown.
  2245. * @param string $element_name the name of the select element
  2246. * @return a string containing html code for a form select element.
  2247. * @deprecated Function not in use
  2248. */
  2249. public static function get_real_course_code_select_html($element_name, $has_size = true, $only_current_user_courses = true, $user_id) {
  2250. if ($only_current_user_courses) {
  2251. $real_course_list = self::get_real_course_list_of_user_as_course_admin($user_id);
  2252. } else {
  2253. $real_course_list = self::get_real_course_list();
  2254. }
  2255. if ($has_size) {
  2256. $size_element = "size=\"".SELECT_BOX_SIZE."\"";
  2257. } else {
  2258. $size_element = "";
  2259. }
  2260. $html_code = "<select name=\"$element_name\" $size_element >\n";
  2261. foreach ($real_course_list as $real_course) {
  2262. $course_code = $real_course["code"];
  2263. $html_code .= "<option value=\"".$course_code."\">";
  2264. $html_code .= $course_code;
  2265. $html_code .= "</option>\n";
  2266. }
  2267. $html_code .= "</select>\n";
  2268. return $html_code;
  2269. }
  2270. /**
  2271. * Get count rows of a table inside a course database
  2272. * @param string The table of which the rows should be counted
  2273. * @param int optionally count rows by session id
  2274. * @return int The number of rows in the given table.
  2275. */
  2276. public static function count_rows_course_table($table, $session_id = '', $course_id = null) {
  2277. $condition_session = '';
  2278. if ($session_id !== '') {
  2279. $session_id = intval($session_id);
  2280. $condition_session = " AND session_id = '$session_id' ";
  2281. }
  2282. if (!empty($course_id)) {
  2283. $course_id = intval($course_id);
  2284. } else {
  2285. $course_id = api_get_course_int_id();
  2286. }
  2287. $condition_session .= " AND c_id = '$course_id' ";
  2288. $sql = "SELECT COUNT(*) AS n FROM $table WHERE 1=1 $condition_session ";
  2289. $rs = Database::query($sql);
  2290. $row = Database::fetch_row($rs);
  2291. return $row[0];
  2292. }
  2293. /**
  2294. * Subscribes courses to human resource manager (Dashboard feature)
  2295. * @param int Human Resource Manager id
  2296. * @param array Courses code
  2297. * @param int Relation type
  2298. **/
  2299. public static function suscribe_courses_to_hr_manager($hr_manager_id,$courses_list) {
  2300. global $_configuration;
  2301. // Database Table Definitions
  2302. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2303. $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2304. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2305. $hr_manager_id = intval($hr_manager_id);
  2306. $affected_rows = 0;
  2307. //Deleting assigned courses to hrm_id
  2308. if ($_configuration['multiple_access_urls']) {
  2309. $sql = "SELECT s.course_code FROM $tbl_course_rel_user s INNER JOIN $tbl_course_rel_access_url a ON (a.course_code = s.course_code) WHERE user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." AND access_url_id = ".api_get_current_access_url_id()."";
  2310. } else {
  2311. $sql = "SELECT course_code FROM $tbl_course_rel_user WHERE user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
  2312. }
  2313. $result = Database::query($sql);
  2314. if (Database::num_rows($result) > 0) {
  2315. while ($row = Database::fetch_array($result)) {
  2316. $sql = "DELETE FROM $tbl_course_rel_user WHERE course_code = '{$row['course_code']}' AND user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
  2317. Database::query($sql);
  2318. }
  2319. }
  2320. // inserting new courses list
  2321. if (is_array($courses_list)) {
  2322. foreach ($courses_list as $course_code) {
  2323. $course_code = Database::escape_string($course_code);
  2324. $insert_sql = "INSERT IGNORE INTO $tbl_course_rel_user(course_code, user_id, status, relation_type) VALUES('$course_code', $hr_manager_id, '".DRH."', '".COURSE_RELATION_TYPE_RRHH."')";
  2325. Database::query($insert_sql);
  2326. if (Database::affected_rows()) {
  2327. $affected_rows++;
  2328. }
  2329. }
  2330. }
  2331. return $affected_rows;
  2332. }
  2333. /**
  2334. * get courses followed by human resources manager
  2335. * @param int human resources manager id
  2336. * @return array courses
  2337. */
  2338. public static function get_courses_followed_by_drh($user_id) {
  2339. // Database Table Definitions
  2340. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2341. $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2342. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2343. $user_id = intval($user_id);
  2344. $assigned_courses_to_hrm = array();
  2345. if (api_get_multiple_access_url()) {
  2346. $sql = "SELECT *, id as real_id FROM $tbl_course c
  2347. INNER JOIN $tbl_course_rel_user cru ON (cru.course_code = c.code) LEFT JOIN $tbl_course_rel_access_url a ON (a.course_code = c.code) WHERE cru.user_id = '$user_id' AND status = ".DRH." AND relation_type = '".COURSE_RELATION_TYPE_RRHH."' AND access_url_id = ".api_get_current_access_url_id()."";
  2348. } else {
  2349. $sql = "SELECT *, id as real_id FROM $tbl_course c
  2350. INNER JOIN $tbl_course_rel_user cru ON cru.course_code = c.code AND cru.user_id = '$user_id' AND status = ".DRH." AND relation_type = '".COURSE_RELATION_TYPE_RRHH."' ";
  2351. }
  2352. $rs_assigned_courses = Database::query($sql);
  2353. if (Database::num_rows($rs_assigned_courses) > 0) {
  2354. while ($row_assigned_courses = Database::fetch_array($rs_assigned_courses)) {
  2355. $assigned_courses_to_hrm[$row_assigned_courses['code']] = $row_assigned_courses;
  2356. }
  2357. }
  2358. return $assigned_courses_to_hrm;
  2359. }
  2360. /**
  2361. * check if a course is special (autoregister)
  2362. * @param string course code
  2363. */
  2364. public static function is_special_course($course_code){
  2365. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2366. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2367. $is_special = false;
  2368. $sql = "SELECT course_code FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf ON " .
  2369. " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 AND course_code='$course_code'";
  2370. $result = Database::query($sql);
  2371. $num_rows = Database::num_rows($result);
  2372. if ($num_rows > 0){
  2373. $is_special = true;
  2374. }
  2375. return $is_special;
  2376. }
  2377. /**
  2378. * Update course picture
  2379. * @param string Course code
  2380. * @param string File name
  2381. * @param string The full system name of the image from which course picture will be created.
  2382. * @return bool Returns the resulting. In case of internal error or negative validation returns FALSE.
  2383. */
  2384. public static function update_course_picture($course_code, $filename, $source_file = null) {
  2385. $course_info = api_get_course_info($course_code);
  2386. $store_path = api_get_path(SYS_COURSE_PATH).$course_info['path']; // course path
  2387. $course_image = $store_path.'/course-pic.png'; // image name for courses
  2388. $course_medium_image = $store_path.'/course-pic85x85.png';
  2389. //$extension = strtolower(substr(strrchr($filename, '.'), 1));
  2390. if (file_exists($course_image)) {
  2391. @unlink($course_image);
  2392. }
  2393. if (file_exists($course_medium_image)) {
  2394. @unlink($course_medium_image);
  2395. }
  2396. $my_course_image = new Image($source_file);
  2397. $result = $my_course_image->send_image($course_image, -1, 'png');
  2398. //Redimension image to 100x85
  2399. if ($result) {
  2400. $medium = new Image($course_image);
  2401. //$picture_infos = $medium->get_image_size();
  2402. $medium->resize(100, 85, 0, false);
  2403. $medium->send_image($store_path.'/course-pic85x85.png', -1, 'png');
  2404. }
  2405. return $result;
  2406. }
  2407. /**
  2408. * @deprecated See CourseManager::course_code_exists()
  2409. */
  2410. public static function is_existing_course_code($wanted_course_code) {
  2411. return self::course_code_exists($wanted_course_code);
  2412. }
  2413. /**
  2414. * Builds the course block in user_portal.php
  2415. * @todo use Twig
  2416. */
  2417. public static function course_item_html($params, $is_sub_content = false) {
  2418. $html = '';
  2419. $class = "well";
  2420. if ($is_sub_content) {
  2421. $class = "course_item";
  2422. }
  2423. $html .= '<div class="'.$class.'">';
  2424. $html .= '<div class="row">';
  2425. $html .= '<div class="span7">';
  2426. $html .= ' <div class="row">';
  2427. $html .= '<div class="span1">';
  2428. if (!empty($params['link'])) {
  2429. $html .= '<a class="thumbnail" href="'.$params['link'].'">';
  2430. $html .= $params['icon'];
  2431. $html .= '</a>';
  2432. } else {
  2433. $html .= '<div class="thumbnail">';
  2434. $html .= $params['icon'];
  2435. $html .= '</div>';
  2436. }
  2437. $html .= '</div>';
  2438. $html .= '<div class="span6">';
  2439. $html .='<h3>'.$params['title'].$params['notifications'].'</h3> ';
  2440. if (!empty($params['subtitle'])) {
  2441. $html .= '<small>'.$params['subtitle'].'</small>';
  2442. }
  2443. if (!empty($params['teachers'])) {
  2444. $html .= '<h5>'.Display::return_icon('teacher.png', get_lang('Teacher'), array(), ICON_SIZE_TINY).$params['teachers'].'</h5>';
  2445. }
  2446. if (!empty($params['coaches'])) {
  2447. $html .= '<h5>'.Display::return_icon('teacher.png', get_lang('Coach'), array(), ICON_SIZE_TINY).$params['coaches'].'</h5>';
  2448. }
  2449. $html .= '</div>';
  2450. $html .= '</div>';
  2451. $html .= '</div>';
  2452. $html .= '<div class="span1 pull-right">'.$params['right_actions'].'</div>';
  2453. $html .= '</div>';
  2454. $html .= '</div>';
  2455. return $html;
  2456. }
  2457. public static function course_item_parent($main_content, $sub_content, $sub_sub_content = null) {
  2458. return '<div class="well">'.$main_content.$sub_content.$sub_sub_content.'</div>';
  2459. }
  2460. /**
  2461. * Display special courses (and only these) as several HTML divs of class userportal-course-item
  2462. *
  2463. * Special courses are courses that stick on top of the list and are "auto-registerable"
  2464. * in the sense that any user clicking them is registered as a student
  2465. * @param int User id
  2466. * @param bool Whether to show the document quick-loader or not
  2467. * @return void
  2468. */
  2469. public static function display_special_courses($user_id, $load_dirs = false) {
  2470. $user_id = intval($user_id);
  2471. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2472. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2473. $special_course_list = self::get_special_course_list();
  2474. $with_special_courses = $without_special_courses = '';
  2475. if (!empty($special_course_list)) {
  2476. $with_special_courses = ' course.code IN ("'.implode('","',$special_course_list).'")';
  2477. }
  2478. if (!empty($with_special_courses)) {
  2479. $sql = "SELECT course.id, course.code, course.subscribe subscr, course.unsubscribe unsubscr, course_rel_user.status status,
  2480. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat, course_rel_user.user_id
  2481. FROM $tbl_course course
  2482. LEFT JOIN $tbl_course_user course_rel_user ON course.code = course_rel_user.course_code AND course_rel_user.user_id = '$user_id'
  2483. WHERE $with_special_courses group by course.code";
  2484. $rs_special_course = Database::query($sql);
  2485. $number_of_courses = Database::num_rows($rs_special_course);
  2486. $key = 0;
  2487. $html = '';
  2488. if ($number_of_courses > 0) {
  2489. while ($course = Database::fetch_array($rs_special_course)) {
  2490. $course_info = api_get_course_info($course['code']);
  2491. $params = array();
  2492. // Get notifications.
  2493. //$course['id_session'] = null;
  2494. //$course['status'] = $course['status'];
  2495. $course_info['id_session'] = null;
  2496. $course_info['status'] = $course['status'];
  2497. $show_notification = Display::show_notification($course_info);
  2498. if (empty($course['user_id'])) {
  2499. $course['status'] = STUDENT;
  2500. }
  2501. $params['icon'] = Display::return_icon('blackboard.png', $course_info['title'], array(), ICON_SIZE_LARGE);
  2502. $params['right_actions'] = '';
  2503. if (api_is_platform_admin()) {
  2504. if ($load_dirs) {
  2505. $params['right_actions'] .= '<a id="document_preview_'.$course['real_id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2506. $params['right_actions'] .= '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2507. $params['right_actions'] .= Display::div('', array('id' => 'document_result_'.$course['real_id'].'_0', 'class'=>'document_preview_container'));
  2508. } else {
  2509. $params['right_actions'] .= '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2510. }
  2511. if ($course['status'] == COURSEMANAGER) {
  2512. //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style'=>'width: 11px; height: 11px;'));
  2513. }
  2514. } else {
  2515. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED) {
  2516. if ($load_dirs) {
  2517. $params['right_actions'] .= '<a id="document_preview_'.$course['real_id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2518. $params['right_actions'] .= Display::div('', array('id' => 'document_result_'.$course['real_id'].'_0', 'class'=>'document_preview_container'));
  2519. }
  2520. }
  2521. }
  2522. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
  2523. $course_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course_info['path'].'/?id_session=0&amp;autoreg=1">'.$course_info['title'].'</a>';
  2524. } else {
  2525. $course_title = $course_info['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2526. }
  2527. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2528. $course_title .= $course_info['visual_code'];
  2529. }
  2530. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2531. $params['teachers'] = CourseManager::get_teacher_list_from_course_code_to_string($course['code'], self::USER_SEPARATOR, true);
  2532. }
  2533. $course_title .= '&nbsp;';
  2534. $course_title .= Display::return_icon('klipper.png', get_lang('CourseAutoRegister'));
  2535. $params['title'] = $course_title;
  2536. $params['link'] = api_get_path(WEB_COURSE_PATH).$course_info['path'].'/?id_session=0&amp;autoreg=1';
  2537. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED) {
  2538. $params['notifications'] = $show_notification;
  2539. }
  2540. $html .= self::course_item_html($params, false);
  2541. $key++;
  2542. }
  2543. }
  2544. }
  2545. return $html;
  2546. }
  2547. /**
  2548. * Display courses (without special courses) as several HTML divs
  2549. * of course categories, as class userportal-catalog-item.
  2550. * @uses display_courses_in_category() to display the courses themselves
  2551. * @param int user id
  2552. * @param bool Whether to show the document quick-loader or not
  2553. * @return void
  2554. */
  2555. public static function display_courses($user_id, $load_dirs = false) {
  2556. $user_id = intval($user_id);
  2557. if (empty($user_id)) {
  2558. $user_id = api_get_user_id();
  2559. }
  2560. // Step 1: We get all the categories of the user
  2561. $tucc = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2562. $sql = "SELECT id, title FROM $tucc WHERE user_id='".$user_id."' ORDER BY sort ASC";
  2563. $result = Database::query($sql);
  2564. while ($row = Database::fetch_array($result)) {
  2565. $params = array();
  2566. // We simply display the title of the category.
  2567. $params['icon'] = Display::return_icon('folder_yellow.png', $row['title'], array(), ICON_SIZE_LARGE);
  2568. $params['title'] = $row['title'];
  2569. $html .= self::course_item_parent(self::course_item_html($params, true), self :: display_courses_in_category($row['id'], $load_dirs));
  2570. }
  2571. // Step 2: We display the course without a user category.
  2572. $html .= self :: display_courses_in_category(0, $load_dirs);
  2573. return $html;
  2574. }
  2575. /**
  2576. * Display courses inside a category (without special courses) as HTML dics of
  2577. * class userportal-course-item.
  2578. * @param int User category id
  2579. * @param bool Whether to show the document quick-loader or not
  2580. * @return void
  2581. */
  2582. public static function display_courses_in_category($user_category_id, $load_dirs = false) {
  2583. $user_id = api_get_user_id();
  2584. // Table definitions
  2585. $TABLECOURS = Database :: get_main_table(TABLE_MAIN_COURSE);
  2586. $TABLECOURSUSER = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
  2587. $TABLE_ACCESS_URL_REL_COURSE = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2588. $current_url_id = api_get_current_access_url_id();
  2589. // Get course list auto-register
  2590. $special_course_list = self::get_special_course_list();
  2591. $without_special_courses = '';
  2592. if (!empty($special_course_list)) {
  2593. $without_special_courses = ' AND course.code NOT IN ("'.implode('","',$special_course_list).'")';
  2594. }
  2595. //AND course_rel_user.relation_type<>".COURSE_RELATION_TYPE_RRHH."
  2596. $sql = "SELECT course.id, course.title, course.code, course.subscribe subscr, course.unsubscribe unsubscr, course_rel_user.status status,
  2597. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat
  2598. FROM $TABLECOURS course,
  2599. $TABLECOURSUSER course_rel_user, ".$TABLE_ACCESS_URL_REL_COURSE." url
  2600. WHERE course.code = course_rel_user.course_code AND url.course_code = course.code AND
  2601. course_rel_user.user_id = '".$user_id."' AND
  2602. course_rel_user.user_course_cat='".$user_category_id."' $without_special_courses ";
  2603. // If multiple URL access mode is enabled, only fetch courses
  2604. // corresponding to the current URL.
  2605. if (api_get_multiple_access_url() && $current_url_id != -1) {
  2606. $sql .= " AND url.course_code=course.code AND access_url_id='".$current_url_id."'";
  2607. }
  2608. // Use user's classification for courses (if any).
  2609. $sql .= " ORDER BY course_rel_user.user_course_cat, course_rel_user.sort ASC";
  2610. $result = Database::query($sql);
  2611. $status_icon = '';
  2612. $html = '';
  2613. $course_list = array();
  2614. // Browse through all courses.
  2615. while ($course = Database::fetch_array($result)) {
  2616. $course_info = api_get_course_info($course['code']);
  2617. //$course['id_session'] = null;
  2618. $course_info['id_session'] = null;
  2619. $course_info['status'] = $course['status'];
  2620. //In order to avoid doubles
  2621. if (in_array($course_info['real_id'], $course_list)) {
  2622. continue;
  2623. } else {
  2624. $course_list[] = $course_info['real_id'];
  2625. }
  2626. // For each course, get if there is any notification icon to show
  2627. // (something that would have changed since the user's last visit).
  2628. $show_notification = Display :: show_notification($course_info);
  2629. // New code displaying the user's status in respect to this course.
  2630. $status_icon = Display::return_icon('blackboard.png', $course_info['title'], array(), ICON_SIZE_LARGE);
  2631. $params = array();
  2632. $params['right_actions'] = '';
  2633. if (api_is_platform_admin()) {
  2634. if ($load_dirs) {
  2635. $params['right_actions'] .= '<a id="document_preview_'.$course_info['real_id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2636. $params['right_actions'] .= '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2637. $params['right_actions'] .= Display::div('', array('id' => 'document_result_'.$course_info['real_id'].'_0', 'class'=>'document_preview_container'));
  2638. } else {
  2639. $params['right_actions'].= '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2640. }
  2641. if ($course_info['status'] == COURSEMANAGER) {
  2642. //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style'=>'width: 11px; height: 11px;'));
  2643. }
  2644. } else {
  2645. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED) {
  2646. if ($load_dirs) {
  2647. $params['right_actions'] .= '<a id="document_preview_'.$course_info['real_id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2648. $params['right_actions'] .= Display::div('', array('id' => 'document_result_'.$course_info['real_id'].'_0', 'class'=>'document_preview_container'));
  2649. } else {
  2650. if ($course_info['status'] == COURSEMANAGER) {
  2651. $params['right_actions'].= '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2652. }
  2653. }
  2654. }
  2655. }
  2656. $course_title = $course_info['title'];
  2657. $course_title_url = '';
  2658. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
  2659. $course_title_url = api_get_path(WEB_COURSE_PATH).$course_info['path'].'/?id_session=0';
  2660. $course_title = Display::url($course_info['title'], $course_title_url);
  2661. } else {
  2662. $course_title = $course_info['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2663. }
  2664. // Start displaying the course block itself
  2665. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2666. $course_title .= $course_info['visual_code'];
  2667. }
  2668. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2669. $teachers = CourseManager::get_teacher_list_from_course_code_to_string($course['code'], self::USER_SEPARATOR, true);
  2670. }
  2671. $params['link'] = $course_title_url;
  2672. $params['icon'] = $status_icon;
  2673. $params['title'] = $course_title;
  2674. $params['teachers'] = $teachers;
  2675. if ($course_info['visibility'] != COURSE_VISIBILITY_CLOSED) {
  2676. $params['notifications'] = $show_notification;
  2677. }
  2678. $is_subcontent = true;
  2679. if (empty($user_category_id)) {
  2680. $is_subcontent = false;
  2681. }
  2682. $html .= self::course_item_html($params, $is_subcontent);
  2683. }
  2684. return $html;
  2685. }
  2686. /**
  2687. * Retrieves the user defined course categories
  2688. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  2689. * @return array containing all the titles of the user defined courses with the id as key of the array
  2690. */
  2691. function get_user_course_categories() {
  2692. global $_user;
  2693. $output = array();
  2694. $table_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2695. $sql = "SELECT * FROM ".$table_category." WHERE user_id='".Database::escape_string($_user['user_id'])."'";
  2696. $result = Database::query($sql);
  2697. while ($row = Database::fetch_array($result)) {
  2698. $output[$row['id']] = $row['title'];
  2699. }
  2700. return $output;
  2701. }
  2702. /**
  2703. * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
  2704. *
  2705. * @param string Original course id
  2706. * @param string Original field name
  2707. * @return int Course id
  2708. */
  2709. public static function get_course_id_from_original_id($original_course_id_value, $original_course_id_name) {
  2710. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2711. $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2712. $sql_course = "SELECT id FROM $table_field cf INNER JOIN $t_cfv cfv ON cfv.field_id=cf.id WHERE field_variable='$original_course_id_name' AND field_value='$original_course_id_value'";
  2713. $res = Database::query($sql_course);
  2714. $row = Database::fetch_object($res);
  2715. if($row != false) {
  2716. return $row->id;
  2717. } else {
  2718. return 0;
  2719. }
  2720. }
  2721. /**
  2722. * Display code for one specific course a logged in user is subscribed to.
  2723. * Shows a link to the course, what's new icons...
  2724. *
  2725. * $my_course['d'] - course directory
  2726. * $my_course['i'] - course title
  2727. * $my_course['c'] - visual course code
  2728. * $my_course['k'] - system course code
  2729. *
  2730. * @param array Course details
  2731. * @param integer Session ID
  2732. * @param string CSS class to apply to course entry
  2733. * @param boolean Whether the session is supposedly accessible now (not in the case it has passed and is in invisible/unaccessible mode)
  2734. * @param bool Whether to show the document quick-loader or not
  2735. * @return string The HTML to be printed for the course entry
  2736. *
  2737. * @version 1.0.3
  2738. * @todo refactor into different functions for database calls | logic | display
  2739. * @todo replace single-character $my_course['d'] indices
  2740. * @todo move code for what's new icons to a separate function to clear things up
  2741. * @todo add a parameter user_id so that it is possible to show the courselist of other users (=generalisation). This will prevent having to write a new function for this.
  2742. */
  2743. public static function get_logged_user_course_html($course, $session_id = 0, $class = 'courses', $session_accessible = true, $load_dirs = false) {
  2744. global $nosession, $nbDigestEntries, $digest, $thisCourseSysCode, $orderKey;
  2745. $user_id = api_get_user_id();
  2746. $course_info = api_get_course_info($course['code']);
  2747. $status_course = CourseManager::get_user_in_course_status($user_id, $course_info['code']);
  2748. $course_info['status'] = empty($session_id) ? $status_course : STUDENT;
  2749. $course_info['id_session'] = $session_id;
  2750. if (!$nosession) {
  2751. global $now, $date_start, $date_end;
  2752. }
  2753. // Table definitions
  2754. $main_user_table = Database :: get_main_table(TABLE_MAIN_USER);
  2755. $tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION);
  2756. $tbl_session_category = Database :: get_main_table(TABLE_MAIN_SESSION_CATEGORY);
  2757. $course_access_settings = CourseManager :: get_access_settings($course_info['code']);
  2758. $course_visibility = $course_access_settings['visibility'];
  2759. $user_in_course_status = CourseManager :: get_user_in_course_status(api_get_user_id(), $course_info['code']);
  2760. $is_coach = api_is_coach($course_info['id_session'], $course['code']);
  2761. // Display course entry.
  2762. // Show a hyperlink to the course, unless the course is closed and user is not course admin.
  2763. $session_url = '';
  2764. $session_title = '';
  2765. if ($session_accessible) {
  2766. if ($course_visibility != COURSE_VISIBILITY_CLOSED || $user_in_course_status == COURSEMANAGER) {
  2767. if (!$nosession) {
  2768. if (empty($course_info['id_session'])) {
  2769. $course_info['id_session'] = 0;
  2770. }
  2771. if ($user_in_course_status == COURSEMANAGER || ($date_start <= $now && $date_end >= $now) || $date_start == '0000-00-00') {
  2772. $session_url = api_get_path(WEB_COURSE_PATH).$course_info['path'].'/?id_session='.$course_info['id_session'];
  2773. $session_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course_info['path'].'/?id_session='.$course_info['id_session'].'">'.$course_info['name'].'</a>';
  2774. }
  2775. } else {
  2776. $session_url = api_get_path(WEB_COURSE_PATH).$course_info['path'].'/';
  2777. $session_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course_info['path'].'/">'.$course_info['name'].'</a>';
  2778. }
  2779. } else {
  2780. $session_title = $course_info['name'].' '.Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2781. }
  2782. } else {
  2783. $session_title = $course_info['name'];
  2784. }
  2785. $params = array();
  2786. $params['icon'] = Display::return_icon('blackboard_blue.png', $course_info['name'], array(), ICON_SIZE_LARGE);
  2787. $params['link'] = $session_url;
  2788. $params['title'] = $session_title;
  2789. $params['right_actions'] = '';
  2790. if ($course_visibility != COURSE_VISIBILITY_CLOSED) {
  2791. if ($load_dirs) {
  2792. $params['right_actions'] .= '<a id="document_preview_'.$course_info['real_id'].'_'.$course_info['id_session'].'" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),ICON_SIZE_SMALL).'</a>';
  2793. $params['right_actions'] .= Display::div('', array('id' => 'document_result_'.$course_info['real_id'].'_'.$course_info['id_session'], 'class'=>'document_preview_container'));
  2794. }
  2795. }
  2796. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2797. $session_title .= $course_info['official_code'];
  2798. }
  2799. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2800. if (!$nosession) {
  2801. $teacher_list = CourseManager::get_teacher_list_from_course_code_to_string($course_info['code'], self::USER_SEPARATOR, true);
  2802. $course_coachs = CourseManager::get_coachs_from_course_to_string($course_info['id_session'], $course['code'], self::USER_SEPARATOR, true);
  2803. if ($course_info['status'] == COURSEMANAGER || ($course_info['status'] == STUDENT && empty($course_info['id_session'])) || empty($course_info['status'])) {
  2804. $params['teachers'] = $teacher_list;
  2805. }
  2806. if (($course_info['status'] == STUDENT && !empty($course_info['id_session'])) || ($is_coach && $course_info['status'] != COURSEMANAGER)) {
  2807. $params['coaches'] = $course_coachs;
  2808. }
  2809. } else {
  2810. $params['teachers'] = $teacher_list;
  2811. }
  2812. }
  2813. $session_title .= isset($course['special_course']) ? ' '.Display::return_icon('klipper.png', get_lang('CourseAutoRegister')) : '';
  2814. // Display the "what's new" icons
  2815. if ($course_visibility != COURSE_VISIBILITY_CLOSED) {
  2816. $session_title .= Display :: show_notification($course_info);
  2817. }
  2818. $params['title'] = $session_title;
  2819. $params['extra'] = '';
  2820. $html = self::course_item_html($params, true);
  2821. $session_category_id = null;
  2822. if (!$nosession) {
  2823. $session = '';
  2824. $active = false;
  2825. if (!empty($course_info['session_name'])) {
  2826. // Request for the name of the general coach
  2827. $sql = 'SELECT lastname, firstname,sc.name
  2828. FROM '.$tbl_session.' ts
  2829. LEFT JOIN '.$main_user_table .' tu
  2830. ON ts.id_coach = tu.user_id
  2831. INNER JOIN '.$tbl_session_category.' sc ON ts.session_category_id = sc.id
  2832. WHERE ts.id='.(int) $course_info['id_session']. ' LIMIT 1';
  2833. $rs = Database::query($sql);
  2834. $sessioncoach = Database::store_result($rs);
  2835. $sessioncoach = $sessioncoach[0];
  2836. $session = array();
  2837. $session['title'] = $course_info['session_name'];
  2838. $session_category_id = CourseManager::get_session_category_id_by_session_id($course_info['id_session']);
  2839. $session['category'] = $sessioncoach['name'];
  2840. if ($course_info['date_start'] == '0000-00-00') {
  2841. //$session['dates'] = get_lang('WithoutTimeLimits');
  2842. $session['dates'] = '';
  2843. if (api_get_setting('show_session_coach') === 'true') {
  2844. $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
  2845. }
  2846. $active = true;
  2847. } else {
  2848. $session ['dates'] = ' - '.get_lang('From').' '.$course_info['date_start'].' '.get_lang('To').' '.$course_info['date_end'];
  2849. if (api_get_setting('show_session_coach') === 'true') {
  2850. $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
  2851. }
  2852. $active = ($date_start <= $now && $date_end >= $now);
  2853. }
  2854. }
  2855. $user_course_category = '';
  2856. if (isset($course_info['user_course_cat'])) {
  2857. $user_course_category = $course_info['user_course_cat'];
  2858. }
  2859. $output = array ($user_course_category, $html, $course_info['id_session'], $session, 'active' => $active, 'session_category_id' => $session_category_id);
  2860. } else {
  2861. $output = array ($course_info['user_course_cat'], $html);
  2862. }
  2863. return $output;
  2864. }
  2865. /**
  2866. *
  2867. * @param string source course code
  2868. * @param int source session id
  2869. * @param string destination course code
  2870. * @param int destination session id
  2871. * @return bool
  2872. */
  2873. public static function copy_course($source_course_code, $source_session_id, $destination_course_code, $destination_session_id, $params = array()) {
  2874. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseBuilder.class.php';
  2875. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseRestorer.class.php';
  2876. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseSelectForm.class.php';
  2877. $course_info = api_get_course_info($source_course_code);
  2878. if (!empty($course_info)) {
  2879. $cb = new CourseBuilder('', $course_info);
  2880. $course = $cb->build($source_session_id, $source_course_code, true);
  2881. $course_restorer = new CourseRestorer($course);
  2882. $course_restorer->skip_content = $params;
  2883. $course_restorer->restore($destination_course_code, $destination_session_id, true, true);
  2884. return true;
  2885. }
  2886. return false;
  2887. }
  2888. /**
  2889. * A simpler version of the copy_course, the function creates an empty course with an autogenerated course code
  2890. *
  2891. * @param string new course title
  2892. * @param string source course code
  2893. * @param int source session id
  2894. * @param int destination session id
  2895. * @param bool new copied tools (Exercises and LPs)will be set to invisible by default?
  2896. *
  2897. * @return array
  2898. */
  2899. public static function copy_course_simple($new_title, $source_course_code, $source_session_id = 0, $destination_session_id = 0, $params = array()) {
  2900. $source_course_info = api_get_course_info($source_course_code);
  2901. if (!empty($source_course_info)) {
  2902. $new_course_code = self::generate_nice_next_course_code($source_course_code);
  2903. if ($new_course_code) {
  2904. $new_course_info = self::create_course($new_title, $new_course_code, false);
  2905. if (!empty($new_course_info['code'])) {
  2906. $result = self::copy_course($source_course_code, $source_session_id, $new_course_info['code'], $destination_session_id, $params);
  2907. if ($result) {
  2908. return $new_course_info;
  2909. }
  2910. }
  2911. }
  2912. }
  2913. return false;
  2914. }
  2915. /**
  2916. * Creates a new course code based in a given code
  2917. *
  2918. * @param string wanted code
  2919. * <code> $wanted_code = 'curse' if there are in the DB codes like curse1 curse2 the function will return: course3</code>
  2920. * if the course code doest not exist in the DB the same course code will be returned
  2921. * @return string wanted unused code
  2922. */
  2923. public static function generate_nice_next_course_code($wanted_code) {
  2924. require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
  2925. $course_code_ok = !self::course_code_exists($wanted_code);
  2926. if (!$course_code_ok) {
  2927. $wanted_code = generate_course_code($wanted_code);
  2928. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  2929. $wanted_code = Database::escape_string($wanted_code);
  2930. $sql = "SELECT count(*) as count FROM $table WHERE code LIKE '$wanted_code%'";
  2931. $result = Database::query($sql);
  2932. if (Database::num_rows($result) > 0 ) {
  2933. $row = Database::fetch_array($result);
  2934. $count = $row['count'] + 1;
  2935. $wanted_code = $wanted_code.'_'.$count;
  2936. $result = api_get_course_info($wanted_code);
  2937. if (empty($result)) {
  2938. return $wanted_code;
  2939. }
  2940. }
  2941. return false;
  2942. }
  2943. return $wanted_code;
  2944. }
  2945. /**
  2946. * Gets the status of the users agreement in a course course-session
  2947. *
  2948. * @param int user id
  2949. * @param string course code
  2950. * @param int session id
  2951. * @return boolean
  2952. */
  2953. public static function is_user_accepted_legal($user_id, $course_code, $session_id = null) {
  2954. $user_id = intval($user_id);
  2955. $course_code = Database::escape_string($course_code);
  2956. $session_id = intval($session_id);
  2957. if (empty($session_id)) {
  2958. $table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2959. $sql = "SELECT legal_agreement FROM $table
  2960. WHERE user_id = $user_id AND course_code ='$course_code' ";
  2961. $result = Database::query($sql);
  2962. if (Database::num_rows($result) > 0 ) {
  2963. $result = Database::fetch_array($result);
  2964. if ($result['legal_agreement'] == 1 ) {
  2965. return true;
  2966. }
  2967. }
  2968. return false;
  2969. } else {
  2970. $table = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  2971. $sql = "SELECT legal_agreement FROM $table
  2972. WHERE id_user = $user_id AND course_code ='$course_code' AND id_session = $session_id";
  2973. $result = Database::query($sql);
  2974. if (Database::num_rows($result) > 0 ) {
  2975. $result = Database::fetch_array($result);
  2976. if ($result['legal_agreement'] == 1 ) {
  2977. return true;
  2978. }
  2979. }
  2980. return false;
  2981. }
  2982. return false;
  2983. }
  2984. /**
  2985. * Saves the user-course legal agreement
  2986. * @param int user id
  2987. * @param string course code
  2988. * @param int session id
  2989. */
  2990. function save_user_legal($user_id, $course_code, $session_id = null) {
  2991. $user_id = intval($user_id);
  2992. $course_code = Database::escape_string($course_code);
  2993. $session_id = intval($session_id);
  2994. if (empty($session_id)) {
  2995. $table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2996. $sql = "UPDATE $table SET legal_agreement = '1'
  2997. WHERE user_id = $user_id AND course_code ='$course_code' ";
  2998. $result = Database::query($sql);
  2999. } else {
  3000. $table = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  3001. $sql = "UPDATE $table SET legal_agreement = '1'
  3002. WHERE id_user = $user_id AND course_code = '$course_code' AND id_session = $session_id";
  3003. $result = Database::query($sql);
  3004. }
  3005. }
  3006. public static function get_user_course_vote($user_id, $course_id, $session_id = null, $url_id = null) {
  3007. $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
  3008. $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
  3009. $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
  3010. $user_id = intval($user_id);
  3011. if (empty($user_id)) {
  3012. return false;
  3013. }
  3014. $params = array(
  3015. 'user_id' => $user_id,
  3016. 'c_id' => $course_id,
  3017. 'session_id' => $session_id,
  3018. 'url_id' => $url_id
  3019. );
  3020. $result = Database::select('vote', $table_user_course_vote, array('where' => array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
  3021. if (!empty($result)) {
  3022. return $result['vote'];
  3023. }
  3024. return false;
  3025. }
  3026. public static function get_course_ranking($course_id, $session_id = null, $url_id = null) {
  3027. $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
  3028. $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
  3029. $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
  3030. $params = array(
  3031. 'c_id' => $course_id,
  3032. 'session_id' => $session_id,
  3033. 'url_id' => $url_id,
  3034. 'creation_date' => $now,
  3035. );
  3036. $result = Database::select('c_id, accesses, total_score, users', $table_course_ranking, array('where' => array('c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
  3037. $point_average_in_percentage = 0;
  3038. $point_average_in_star = 0;
  3039. $users_who_voted = 0;
  3040. if (!empty($result['users'])) {
  3041. $users_who_voted = $result['users'];
  3042. $point_average_in_percentage = round($result['total_score']/$result['users'] * 100 / 5, 2);
  3043. $point_average_in_star = round($result['total_score']/$result['users'], 1);
  3044. }
  3045. $result['user_vote'] = false;
  3046. if (!api_is_anonymous()) {
  3047. $result['user_vote'] = self::get_user_course_vote(api_get_user_id(), $course_id, $session_id,$url_id);
  3048. }
  3049. $result['point_average'] = $point_average_in_percentage;
  3050. $result['point_average_star'] = $point_average_in_star;
  3051. $result['users_who_voted'] = $users_who_voted;
  3052. return $result;
  3053. }
  3054. /**
  3055. *
  3056. * Updates the course ranking
  3057. * @param int course id
  3058. * @param int session id
  3059. * @param id url id
  3060. *
  3061. **/
  3062. public static function update_course_ranking($course_id = null, $session_id = null, $url_id = null, $points_to_add = null, $add_access = true, $add_user = true) {
  3063. //Course catalog stats modifications see #4191
  3064. $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
  3065. $now = api_get_utc_datetime();
  3066. $course_id = empty($course_id) ? api_get_course_int_id() : intval($course_id);
  3067. $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
  3068. $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
  3069. $params = array(
  3070. 'c_id' => $course_id,
  3071. 'session_id' => $session_id,
  3072. 'url_id' => $url_id,
  3073. 'creation_date' => $now,
  3074. );
  3075. $result = Database::select('id, accesses, total_score, users', $table_course_ranking, array('where' => array('c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
  3076. // Problem here every thime we load the courses/XXXX/index.php course home page we update the access
  3077. if (empty($result)) {
  3078. if ($add_access) {
  3079. $params['accesses'] = 1;
  3080. }
  3081. //The votes and users are empty
  3082. if (isset($points_to_add) && !empty($points_to_add)) {
  3083. $params['total_score'] = intval($points_to_add);
  3084. }
  3085. if ($add_user) {
  3086. $params['users'] = 1;
  3087. }
  3088. $result = Database::insert($table_course_ranking, $params);
  3089. } else {
  3090. $my_params = array();
  3091. if ($add_access) {
  3092. $my_params['accesses'] = intval($result['accesses']) + 1;
  3093. }
  3094. if (isset($points_to_add) && !empty($points_to_add)) {
  3095. $my_params['total_score'] = $result['total_score'] + $points_to_add;
  3096. }
  3097. if ($add_user) {
  3098. $my_params['users'] = $result['users'] + 1;
  3099. }
  3100. if (!empty($my_params)) {
  3101. $result = Database::update($table_course_ranking, $my_params, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
  3102. }
  3103. }
  3104. return $result;
  3105. }
  3106. /**
  3107. * Add user vote to a course
  3108. *
  3109. * @param int user id
  3110. * @param int vote [1..5]
  3111. * @param int course id
  3112. * @param int session id
  3113. * @param int url id (access_url_id)
  3114. * @return mixed 'added', 'updated' or 'nothing'
  3115. *
  3116. */
  3117. public function add_course_vote($user_id, $vote, $course_id, $session_id = null, $url_id = null) {
  3118. $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
  3119. $course_id = empty($course_id) ? api_get_course_int_id() : intval($course_id);
  3120. if (empty($course_id) || empty($user_id)) {
  3121. return false;
  3122. }
  3123. if (!in_array($vote, array(1,2,3,4,5))) {
  3124. return false;
  3125. }
  3126. $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
  3127. $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
  3128. $vote = intval($vote);
  3129. $params = array(
  3130. 'user_id' => intval($user_id),
  3131. 'c_id' => $course_id,
  3132. 'session_id' => $session_id,
  3133. 'url_id' => $url_id,
  3134. 'vote' => $vote
  3135. );
  3136. $action_done = 'nothing';
  3137. $result = Database::select('id, vote', $table_user_course_vote, array('where' => array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
  3138. if (empty($result)) {
  3139. $result = Database::insert($table_user_course_vote, $params);
  3140. $points_to_add = $vote;
  3141. $add_user = true;
  3142. $action_done = 'added';
  3143. } else {
  3144. $my_params = array('vote' => $vote);
  3145. $points_to_add = $vote - $result['vote'];
  3146. $add_user = false;
  3147. $result = Database::update($table_user_course_vote, $my_params, array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params));
  3148. $action_done = 'updated';
  3149. }
  3150. //Current points
  3151. if (!empty($points_to_add)) {
  3152. self::update_course_ranking($course_id, $session_id, $url_id, $points_to_add, false, $add_user);
  3153. }
  3154. return $action_done;
  3155. }
  3156. /**
  3157. * Remove course ranking + user votes
  3158. *
  3159. * @param int course id
  3160. * @param int session id
  3161. * @param int url id
  3162. *
  3163. */
  3164. public function remove_course_ranking($course_id, $session_id, $url_id = null) {
  3165. $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
  3166. $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
  3167. if (!empty($course_id) && isset($session_id)) {
  3168. $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
  3169. $params = array(
  3170. 'c_id' => $course_id,
  3171. 'session_id' => $session_id,
  3172. 'url_id' => $url_id,
  3173. );
  3174. Database::delete($table_course_ranking, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
  3175. Database::delete($table_user_course_vote, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
  3176. }
  3177. }
  3178. /**
  3179. * Returns an array with the hottest courses
  3180. * @param int number of days
  3181. * @param int number of hottest courses
  3182. */
  3183. public static function return_hot_courses($days = 30, $limit = 5) {
  3184. global $_configuration;
  3185. $limit = intval($limit);
  3186. //Getting my courses
  3187. $my_course_list = CourseManager::get_courses_list_by_user_id(api_get_user_id());
  3188. $my_course_code_list = array();
  3189. foreach ($my_course_list as $course) {
  3190. $my_course_code_list[$course['real_id']] = $course['real_id'];
  3191. }
  3192. if (api_is_drh()) {
  3193. $courses = CourseManager::get_courses_followed_by_drh(api_get_user_id());
  3194. foreach ($courses as $course) {
  3195. $my_course_code_list[$course['real_id']] = $course['real_id'];
  3196. }
  3197. }
  3198. $table_course_access = Database::get_main_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
  3199. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  3200. $table_course_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  3201. //@todo all dates in the tracking_course_access, last_access are in the DB time (NOW) not UTC
  3202. /*
  3203. $today = api_get_utc_datetime();
  3204. $today_diff = time() -intval($days)*24*60*60;
  3205. $today_diff = api_get_utc_datetime($today_diff);
  3206. * */
  3207. //WHERE login_course_date <= '$today' AND login_course_date >= '$today_diff'
  3208. //$table_course_access table uses the now() and interval ...
  3209. $sql = "SELECT COUNT(course_access_id) course_count, a.course_code, visibility ".
  3210. "FROM $table_course c INNER JOIN $table_course_access a ".
  3211. " ON (c.code = a.course_code) INNER JOIN $table_course_url u ON u.course_code = a.course_code ".
  3212. " WHERE u.access_url_id = ".$_configuration['access_url']." AND".
  3213. " login_course_date <= now() AND ".
  3214. " login_course_date > DATE_SUB(now(), INTERVAL $days DAY) AND".
  3215. " visibility <> '".COURSE_VISIBILITY_CLOSED."'".
  3216. " GROUP BY course_code".
  3217. " ORDER BY course_count DESC".
  3218. " LIMIT $limit";
  3219. $result = Database::query($sql);
  3220. $courses = array();
  3221. if (Database::num_rows($result)) {
  3222. $courses = Database::store_result($result, 'ASSOC');
  3223. $ajax_url = api_get_path(WEB_AJAX_PATH).'course.ajax.php?a=add_course_vote';
  3224. foreach ($courses as &$my_course) {
  3225. $course_info = api_get_course_info($my_course['course_code']);
  3226. $my_course['extra_info'] = $course_info;
  3227. $my_course['extra_info']['go_to_course_button'] = '';
  3228. $access_link = self::get_access_link_by_user(api_get_user_id(), $course_info, $my_course_code_list);
  3229. //Course visibility
  3230. if (0 === strcmp($access_link,'register')) {
  3231. $stok = Security::get_token();
  3232. $my_course['extra_info']['go_to_course_button'] = Display::url(get_lang('Subscribe'), api_get_path(WEB_COURSE_PATH).$course_info['path'].'/index.php?action=subscribe&amp;sec_token='.$stok, array('class' => 'btn btn-primary'));
  3233. } elseif (0 === strcmp($access_link,'enter')) {
  3234. $my_course['extra_info']['go_to_course_button'] = Display::url(get_lang('GoToCourse'), api_get_path(WEB_COURSE_PATH).$course_info['path'].'/index.php', array('class' => 'btn btn-primary'));
  3235. }
  3236. //Description
  3237. $my_course['extra_info']['description_button'] = '';
  3238. if ($course_info['visibility'] == COURSE_VISIBILITY_OPEN_WORLD || in_array($course_info['real_id'], $my_course_code_list) ) {
  3239. $my_course['extra_info']['description_button'] = Display::url(get_lang('Description'), api_get_path(WEB_AJAX_PATH).'course_home.ajax.php?a=show_course_information&code='.$course_info['code'], array('class' => 'ajax btn'));
  3240. }
  3241. $my_course['extra_info']['teachers'] = CourseManager::get_teacher_list_from_course_code_to_string($course_info['code']);
  3242. $point_info = self::get_course_ranking($course_info['real_id'], 0);
  3243. $my_course['extra_info']['rating_html'] = Display::return_rating_system('star_'.$course_info['real_id'], $ajax_url.'&amp;course_id='.$course_info['real_id'], $point_info);
  3244. }
  3245. }
  3246. return $courses;
  3247. }
  3248. public function return_most_accessed_courses($limit = 5) {
  3249. $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
  3250. $params['url_id'] = api_get_current_access_url_id();
  3251. $result = Database::select('c_id, accesses, total_score, users', $table_course_ranking, array('where' => array('url_id = ?' => $params), 'order' => 'accesses DESC', 'limit' => $limit), 'all', true);
  3252. return $result;
  3253. }
  3254. /**
  3255. *
  3256. *
  3257. * @return ResultSet
  3258. */
  3259. static function list_inactive_courses($ceiling, $visibility_level = COURSE_VISIBILITY_REGISTERED) {
  3260. $ceiling = is_numeric($ceiling) ? (int) $ceiling : strtotime($ceiling);
  3261. $ceiling = date('Y-m-d H:i:s', $ceiling);
  3262. $visibility_level = $visibility_level ? $visibility_level : '0';
  3263. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  3264. $table_category = Database::get_main_table(TABLE_MAIN_CATEGORY);
  3265. $sql = "SELECT
  3266. c.*,
  3267. cat.name AS category
  3268. FROM
  3269. $table_course AS c
  3270. LEFT JOIN
  3271. $table_category AS cat
  3272. ON
  3273. c.category_code = cat.code
  3274. WHERE
  3275. c.visibility >= $visibility_level AND
  3276. c.last_visit<='$ceiling'
  3277. ";
  3278. return ResultSet::create($sql);
  3279. }
  3280. /**
  3281. * Get courses count
  3282. * @param int Access URL ID (optional)
  3283. * @return int Number of courses
  3284. */
  3285. public static function count_courses($access_url_id=null) {
  3286. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  3287. $table_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  3288. $sql = "SELECT count(id) FROM $table_course c";
  3289. if (!empty($access_url_id) && $access_url_id == intval($access_url_id)) {
  3290. $sql .= ", $table_course_rel_access_url u WHERE c.code = u.course_code AND u.access_url_id = $access_url_id";
  3291. }
  3292. $res = Database::query($sql);
  3293. $row = Database::fetch_row($res);
  3294. return $row[0];
  3295. }
  3296. /**
  3297. * Return a link to go to the course, validating the visibility of the
  3298. * course and the user status
  3299. * @param int User ID
  3300. * @param array Course details array
  3301. * @param array List of courses to which the user is subscribed (if not provided, will be generated)
  3302. * @return mixed 'enter' for a link to go to the course or 'register' for a link to subscribe, or false if no access
  3303. */
  3304. static function get_access_link_by_user($uid, $course, $user_courses = array()) {
  3305. if (empty($uid) or empty($course)) { return false; }
  3306. if (empty($user_courses)) {
  3307. // get the array of courses to which the user is subscribed
  3308. $user_courses = CourseManager::get_courses_list_by_user_id($uid);
  3309. foreach ($user_courses as $k => $v) {
  3310. $user_courses[$k] = $v['real_id'];
  3311. }
  3312. }
  3313. $is_admin = api_is_platform_admin_by_id($uid);
  3314. // Register button
  3315. if (!api_is_anonymous($uid) && !$is_admin
  3316. && ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD || $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  3317. && $course['subscribe_allowed'] == SUBSCRIBE_ALLOWED
  3318. && (!in_array($course['real_id'], $user_courses) || empty($user_courses))
  3319. ) {
  3320. return 'register';
  3321. }
  3322. // Go To Course button (only if admin, if course public or if student already subscribed)
  3323. if ($is_admin
  3324. || $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
  3325. || (api_user_is_login($uid) && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
  3326. || (in_array($course['real_id'], $user_courses) && $course['visibility'] != COURSE_VISIBILITY_CLOSED)
  3327. ) {
  3328. return 'enter';
  3329. }
  3330. // Print register button (if any)
  3331. return false;
  3332. }
  3333. } //end class CourseManager