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