sessionmanager.lib.php 23 KB

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  1. <?php //$id: $
  2. /* For licensing terms, see /dokeos_license.txt */
  3. /**
  4. ==============================================================================
  5. * This class provides methods for sessions management.
  6. * Include/require it in your code to use its features.
  7. *
  8. * @package dokeos.library
  9. ==============================================================================
  10. */
  11. require_once('display.lib.php');
  12. class SessionManager {
  13. private function __construct() {
  14. }
  15. /**
  16. * Fetches a session from the database
  17. * @param int Session ID
  18. * @return array Session details (id, id_coach, name, nbr_courses, nbr_users, nbr_classes, date_start, date_end, nb_days_access_before_beginning,nb_days_access_after_end, session_admin_id)
  19. */
  20. public static function fetch($id) {
  21. $t = Database::get_main_table(TABLE_MAIN_SESSION);
  22. if ($id != strval(intval($id))) { return array(); }
  23. $s = "SELECT * FROM $t WHERE id = $id";
  24. $r = Database::query($s,__FILE__,__LINE__);
  25. if (Database::num_rows($r) != 1) { return array(); }
  26. return Database::fetch_array($r,'ASSOC');
  27. }
  28. /**
  29. * Create a session
  30. * @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
  31. * @param string name
  32. * @param integer year_start
  33. * @param integer month_start
  34. * @param integer day_start
  35. * @param integer year_end
  36. * @param integer month_end
  37. * @param integer day_end
  38. * @param integer nb_days_acess_before
  39. * @param integer nb_days_acess_after
  40. * @param integer nolimit
  41. * @param string coach_username
  42. * @return $id_session;
  43. **/
  44. public static function create_session ($sname,$syear_start,$smonth_start,$sday_start,$syear_end,$smonth_end,$sday_end,$snb_days_acess_before,$snb_days_acess_after,$nolimit,$coach_username) {
  45. global $_user;
  46. $name= trim($sname);
  47. $year_start= intval($syear_start);
  48. $month_start=intval($smonth_start);
  49. $day_start=intval($sday_start);
  50. $year_end=intval($syear_end);
  51. $month_end=intval($smonth_end);
  52. $day_end=intval($sday_end);
  53. $nb_days_acess_before = intval($snb_days_acess_before);
  54. $nb_days_acess_after = intval($snb_days_acess_after);
  55. $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
  56. $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
  57. $sql = 'SELECT user_id FROM '.$tbl_user.' WHERE username="'.Database::escape_string($coach_username).'"';
  58. $rs = Database::query($sql, __FILE__, __LINE__);
  59. $id_coach = Database::result($rs,0,'user_id');
  60. if (empty($nolimit)) {
  61. $date_start="$year_start-".(($month_start < 10)?"0$month_start":$month_start)."-".(($day_start < 10)?"0$day_start":$day_start);
  62. $date_end="$year_end-".(($month_end < 10)?"0$month_end":$month_end)."-".(($day_end < 10)?"0$day_end":$day_end);
  63. } else {
  64. $date_start="000-00-00";
  65. $date_end="000-00-00";
  66. }
  67. if (empty($name)) {
  68. $msg=get_lang('SessionNameIsRequired');
  69. return $msg;
  70. } elseif (empty($coach_username)) {
  71. $msg=get_lang('CoachIsRequired');
  72. return $msg;
  73. } elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
  74. $msg=get_lang('InvalidStartDate');
  75. return $msg;
  76. } elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
  77. $msg=get_lang('InvalidEndDate');
  78. return $msg;
  79. } elseif(empty($nolimit) && $date_start >= $date_end) {
  80. $msg=get_lang('StartDateShouldBeBeforeEndDate');
  81. return $msg;
  82. } else {
  83. $rs = Database::query("SELECT 1 FROM $tbl_session WHERE name='".addslashes($name)."'");
  84. if(Database::num_rows($rs)) {
  85. $msg=get_lang('SessionNameAlreadyExists');
  86. return $msg;
  87. } else {
  88. Database::query("INSERT INTO $tbl_session(name,date_start,date_end,id_coach,session_admin_id, nb_days_access_before_beginning, nb_days_access_after_end) VALUES('".Database::escape_string($name)."','$date_start','$date_end','$id_coach',".intval($_user['user_id']).",".$nb_days_acess_before.", ".$nb_days_acess_after.")",__FILE__,__LINE__);
  89. $id_session=Database::get_last_insert_id();
  90. // add event to system log
  91. $time = time();
  92. $user_id = api_get_user_id();
  93. event_system(LOG_SESSION_CREATE, LOG_SESSION_ID, $id_session, $time, $user_id);
  94. return $id_session;
  95. }
  96. }
  97. }
  98. /**
  99. * Edit a session
  100. * @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
  101. * @param integer id
  102. * @param string name
  103. * @param integer year_start
  104. * @param integer month_start
  105. * @param integer day_start
  106. * @param integer year_end
  107. * @param integer month_end
  108. * @param integer day_end
  109. * @param integer nb_days_acess_before
  110. * @param integer nb_days_acess_after
  111. * @param integer nolimit
  112. * @param integer id_coach
  113. * @return $id;
  114. * The parameter id is a primary key
  115. **/
  116. public static function edit_session ($id,$name,$year_start,$month_start,$day_start,$year_end,$month_end,$day_end,$nb_days_acess_before,$nb_days_acess_after,$nolimit,$id_coach) {
  117. global $_user;
  118. $name=trim(stripslashes($name));
  119. $year_start=intval($year_start);
  120. $month_start=intval($month_start);
  121. $day_start=intval($day_start);
  122. $year_end=intval($year_end);
  123. $month_end=intval($month_end);
  124. $day_end=intval($day_end);
  125. $id_coach= intval($id_coach);
  126. $nb_days_acess_before= intval($nb_days_acess_before);
  127. $nb_days_acess_after = intval($nb_days_acess_after);
  128. $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
  129. $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
  130. $tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  131. if (empty($nolimit)) {
  132. $date_start="$year_start-".(($month_start < 10)?"0$month_start":$month_start)."-".(($day_start < 10)?"0$day_start":$day_start);
  133. $date_end="$year_end-".(($month_end < 10)?"0$month_end":$month_end)."-".(($day_end < 10)?"0$day_end":$day_end);
  134. } else {
  135. $date_start="000-00-00";
  136. $date_end="000-00-00";
  137. }
  138. if (empty($name)) {
  139. $msg=get_lang('SessionNameIsRequired');
  140. return $msg;
  141. } elseif (empty($id_coach)) {
  142. $msg=get_lang('CoachIsRequired');
  143. return $msg;
  144. } elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start,$day_start,$year_start))) {
  145. $msg=get_lang('InvalidStartDate');
  146. return $msg;
  147. } elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end,$day_end,$year_end))) {
  148. $msg=get_lang('InvalidEndDate');
  149. return $msg;
  150. } elseif (empty($nolimit) && $date_start >= $date_end) {
  151. $msg=get_lang('StartDateShouldBeBeforeEndDate');
  152. return $msg;
  153. } else {
  154. $rs = Database::query("SELECT id FROM $tbl_session WHERE name='".Database::escape_string($name)."'");
  155. $exists = false;
  156. while ($row = Database::fetch_array($rs)) {
  157. if($row['id']!=$id)
  158. $exists = true;
  159. }
  160. if ($exists) {
  161. $msg=get_lang('SessionNameAlreadyExists');
  162. return $msg;
  163. } else {
  164. $sql="UPDATE $tbl_session " .
  165. "SET name='".Database::escape_string($name)."',
  166. date_start='".$date_start."',
  167. date_end='".$date_end."',
  168. id_coach='".$id_coach."',
  169. nb_days_access_before_beginning = ".$nb_days_acess_before.",
  170. nb_days_access_after_end = ".$nb_days_acess_after."
  171. WHERE id='$id'";
  172. Database::query($sql,__FILE__,__LINE__);
  173. /*$sqlu = "UPDATE $tbl_session_rel_course " .
  174. " SET id_coach='$id_coach'" .
  175. " WHERE id_session='$id'";
  176. Database::query($sqlu,__FILE__,__LINE__);*/
  177. return $id;
  178. }
  179. }
  180. }
  181. /**
  182. * Delete session
  183. * @author Carlos Vargas <carlos.vargas@dokeos.com>, from existing code
  184. * @param array id_checked
  185. * @return void Nothing, or false on error
  186. * The parameters is a array to delete sessions
  187. **/
  188. public static function delete_session ($id_checked) {
  189. $tbl_session= Database::get_main_table(TABLE_MAIN_SESSION);
  190. $tbl_session_rel_course= Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  191. $tbl_session_rel_course_rel_user= Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  192. $tbl_session_rel_user= Database::get_main_table(TABLE_MAIN_SESSION_USER);
  193. $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
  194. global $_user;
  195. if(is_array($id_checked)) {
  196. $id_checked=Database::escape_string(implode(',',$id_checked));
  197. } else {
  198. $id_checked=intval($id_checked);
  199. }
  200. if (!api_is_platform_admin()) {
  201. $sql = 'SELECT session_admin_id FROM '.Database :: get_main_table(TABLE_MAIN_SESSION).' WHERE id='.$id_checked;
  202. $rs = Database::query($sql,__FILE__,__LINE__);
  203. if (Database::result($rs,0,0)!=$_user['user_id']) {
  204. api_not_allowed(true);
  205. }
  206. }
  207. Database::query("DELETE FROM $tbl_session WHERE id IN($id_checked)",__FILE__,__LINE__);
  208. Database::query("DELETE FROM $tbl_session_rel_course WHERE id_session IN($id_checked)",__FILE__,__LINE__);
  209. Database::query("DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session IN($id_checked)",__FILE__,__LINE__);
  210. Database::query("DELETE FROM $tbl_session_rel_user WHERE id_session IN($id_checked)",__FILE__,__LINE__);
  211. // delete extra session fields
  212. $t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
  213. $t_sfv = Database::get_main_table(TABLE_MAIN_SESSION_FIELD_VALUES);
  214. $sql = "SELECT distinct field_id FROM $t_sfv WHERE session_id = '$id_checked'";
  215. $res_field_ids = @Database::query($sql,__FILE__,__LINE__);
  216. while($row_field_id = Database::fetch_row($res_field_ids)){
  217. $field_ids[] = $row_field_id[0];
  218. }
  219. //delete from table_session_field_value from a given session id
  220. $sql_session_field_value = "DELETE FROM $t_sfv WHERE session_id = '$id_checked'";
  221. @Database::query($sql_session_field_value,__FILE__,__LINE__);
  222. $sql = "SELECT distinct field_id FROM $t_sfv";
  223. $res_field_all_ids = @Database::query($sql,__FILE__,__LINE__);
  224. while($row_field_all_id = Database::fetch_row($res_field_all_ids)){
  225. $field_all_ids[] = $row_field_all_id[0];
  226. }
  227. if (count($field_ids) > 0 && count($field_all_ids) > 0) {
  228. foreach($field_ids as $field_id) {
  229. // check if field id is used into table field value
  230. if (in_array($field_id,$field_all_ids)) {
  231. continue;
  232. } else {
  233. $sql_session_field = "DELETE FROM $t_sf WHERE id = '$field_id'";
  234. Database::query($sql_session_field,__FILE__,__LINE__);
  235. }
  236. }
  237. }
  238. // add event to system log
  239. $time = time();
  240. $user_id = api_get_user_id();
  241. event_system(LOG_SESSION_DELETE, LOG_SESSION_ID, $id_checked, $time, $user_id);
  242. }
  243. /**
  244. * Subscribes users to the given session and optionally (default) unsubscribes previous users
  245. * @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
  246. * @param integer Session ID
  247. * @param array List of user IDs
  248. * @param bool Whether to unsubscribe existing users (true, default) or not (false)
  249. * @return void Nothing, or false on error
  250. **/
  251. public static function suscribe_users_to_session ($id_session,$user_list,$empty_users=true) {
  252. if ($id_session!= strval(intval($id_session))) return false;
  253. foreach($user_list as $intUser){
  254. if ($intUser!= strval(intval($intUser))) return false;
  255. }
  256. $tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  257. $tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  258. $tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);
  259. $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
  260. $sql = "SELECT id_user FROM $tbl_session_rel_user WHERE id_session='$id_session'";
  261. $result = Database::query($sql,__FILE__,__LINE__);
  262. $existingUsers = array();
  263. while($row = Database::fetch_array($result)){
  264. $existingUsers[] = $row['id_user'];
  265. }
  266. $sql = "SELECT course_code FROM $tbl_session_rel_course WHERE id_session='$id_session'";
  267. $result=Database::query($sql,__FILE__,__LINE__);
  268. $course_list=array();
  269. while($row=Database::fetch_array($result)) {
  270. $course_list[]=$row['course_code'];
  271. }
  272. foreach ($course_list as $enreg_course) {
  273. // for each course in the session
  274. $nbr_users=0;
  275. $enreg_course = Database::escape_string($enreg_course);
  276. // delete existing users
  277. if ($empty_users!==false) {
  278. foreach ($existingUsers as $existing_user) {
  279. if(!in_array($existing_user, $user_list)) {
  280. $sql = "DELETE FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course' AND id_user='$existing_user'";
  281. Database::query($sql,__FILE__,__LINE__);
  282. if(Database::affected_rows()) {
  283. $nbr_users--;
  284. }
  285. }
  286. }
  287. }
  288. // insert new users into session_rel_course_rel_user and ignore if they already exist
  289. foreach ($user_list as $enreg_user) {
  290. if(!in_array($enreg_user, $existingUsers)) {
  291. $enreg_user = Database::escape_string($enreg_user);
  292. $insert_sql = "INSERT IGNORE INTO $tbl_session_rel_course_rel_user(id_session,course_code,id_user) VALUES('$id_session','$enreg_course','$enreg_user')";
  293. Database::query($insert_sql,__FILE__,__LINE__);
  294. if(Database::affected_rows()) {
  295. $nbr_users++;
  296. }
  297. }
  298. }
  299. // count users in this session-course relation
  300. $sql = "SELECT COUNT(id_user) as nbUsers FROM $tbl_session_rel_course_rel_user WHERE id_session='$id_session' AND course_code='$enreg_course'";
  301. $rs = Database::query($sql, __FILE__, __LINE__);
  302. list($nbr_users) = Database::fetch_array($rs);
  303. // update the session-course relation to add the users total
  304. $update_sql = "UPDATE $tbl_session_rel_course SET nbr_users=$nbr_users WHERE id_session='$id_session' AND course_code='$enreg_course'";
  305. Database::query($update_sql,__FILE__,__LINE__);
  306. }
  307. // delete users from the session
  308. if ($empty_users===true){
  309. Database::query("DELETE FROM $tbl_session_rel_user WHERE id_session = $id_session",__FILE__,__LINE__);
  310. }
  311. // insert missing users into session
  312. $nbr_users = 0;
  313. foreach ($user_list as $enreg_user) {
  314. $enreg_user = Database::escape_string($enreg_user);
  315. $nbr_users++;
  316. $insert_sql = "INSERT IGNORE INTO $tbl_session_rel_user(id_session, id_user) VALUES('$id_session','$enreg_user')";
  317. Database::query($insert_sql,__FILE__,__LINE__);
  318. }
  319. // update number of users in the session
  320. $nbr_users = count($user_list);
  321. $update_sql = "UPDATE $tbl_session SET nbr_users= $nbr_users WHERE id='$id_session' ";
  322. Database::query($update_sql,__FILE__,__LINE__);
  323. }
  324. /** Subscribes courses to the given session and optionally (default) unsubscribes previous users
  325. * @author Carlos Vargas <carlos.vargas@dokeos.com>,from existing code
  326. * @param int Session ID
  327. * @param array List of courses IDs
  328. * @param bool Whether to unsubscribe existing users (true, default) or not (false)
  329. * @return void Nothing, or false on error
  330. **/
  331. public static function add_courses_to_session ($id_session, $course_list, $empty_courses=true) {
  332. // security checks
  333. if ($id_session!= strval(intval($id_session))) { return false; }
  334. foreach($course_list as $intCourse){
  335. if ($intCourse!= strval(intval($intCourse))) { return false; }
  336. }
  337. // initialisation
  338. $tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  339. $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
  340. $tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);
  341. $tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  342. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  343. // get general coach ID
  344. $id_coach = Database::query("SELECT id_coach FROM $tbl_session WHERE id=$id_session");
  345. $id_coach = Database::fetch_array($id_coach);
  346. $id_coach = $id_coach[0];
  347. // get list of courses subscribed to this session
  348. $rs = Database::query("SELECT course_code FROM $tbl_session_rel_course WHERE id_session=$id_session");
  349. $existingCourses = Database::store_result($rs);
  350. $nbr_courses=count($existingCourses);
  351. // get list of users subscribed to this session
  352. $sql="SELECT id_user
  353. FROM $tbl_session_rel_user
  354. WHERE id_session = $id_session";
  355. $result=Database::query($sql,__FILE__,__LINE__);
  356. $user_list=Database::store_result($result);
  357. // remove existing courses from the session
  358. if ($empty_courses===true) {
  359. foreach ($existingCourses as $existingCourse) {
  360. if (!in_array($existingCourse['course_code'], $course_list)){
  361. Database::query("DELETE FROM $tbl_session_rel_course WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
  362. Database::query("DELETE FROM $tbl_session_rel_course_rel_user WHERE course_code='".$existingCourse['course_code']."' AND id_session=$id_session");
  363. }
  364. }
  365. $nbr_courses=0;
  366. }
  367. // Pass through the courses list we want to add to the session
  368. foreach ($course_list as $enreg_course) {
  369. $enreg_course = Database::escape_string($enreg_course);
  370. $exists = false;
  371. // check if the course we want to add is already subscribed
  372. foreach ($existingCourses as $existingCourse) {
  373. if ($enreg_course == $existingCourse['course_code']) {
  374. $exists=true;
  375. }
  376. }
  377. if (!$exists) {
  378. //if the course isn't subscribed yet
  379. $sql_insert_rel_course= "INSERT INTO $tbl_session_rel_course (id_session,course_code, id_coach) VALUES ('$id_session','$enreg_course','$id_coach')";
  380. Database::query($sql_insert_rel_course ,__FILE__,__LINE__);
  381. //We add the current course in the existing courses array, to avoid adding another time the current course
  382. $existingCourses[]=array('course_code'=>$enreg_course);
  383. $nbr_courses++;
  384. // subscribe all the users from the session to this course inside the session
  385. $nbr_users=0;
  386. foreach ($user_list as $enreg_user) {
  387. $enreg_user_id = Database::escape_string($enreg_user['id_user']);
  388. $sql_insert = "INSERT IGNORE INTO $tbl_session_rel_course_rel_user (id_session,course_code,id_user) VALUES ('$id_session','$enreg_course','$enreg_user_id')";
  389. Database::query($sql_insert,__FILE__,__LINE__);
  390. if (Database::affected_rows()) {
  391. $nbr_users++;
  392. }
  393. }
  394. Database::query("UPDATE $tbl_session_rel_course SET nbr_users=$nbr_users WHERE id_session='$id_session' AND course_code='$enreg_course'",__FILE__,__LINE__);
  395. }
  396. }
  397. Database::query("UPDATE $tbl_session SET nbr_courses=$nbr_courses WHERE id='$id_session'",__FILE__,__LINE__);
  398. }
  399. /**
  400. * Creates a new extra field for a given session
  401. * @param string Field's internal variable name
  402. * @param int Field's type
  403. * @param string Field's language var name
  404. * @return int new extra field id
  405. */
  406. public static function create_session_extra_field ($fieldvarname, $fieldtype, $fieldtitle) {
  407. // database table definition
  408. $t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
  409. $fieldvarname = Database::escape_string($fieldvarname);
  410. $fieldtitle = Database::escape_string($fieldtitle);
  411. $fieldtype = (int)$fieldtype;
  412. $time = time();
  413. $sql_field = "SELECT id FROM $t_sf WHERE field_variable = '$fieldvarname'";
  414. $res_field = Database::query($sql_field,__FILE__,__LINE__);
  415. $r_field = Database::fetch_row($res_field);
  416. if (Database::num_rows($res_field)>0) {
  417. $field_id = $r_field[0];
  418. } else {
  419. // save new fieldlabel into course_field table
  420. $sql = "SELECT MAX(field_order) FROM $t_sf";
  421. $res = Database::query($sql,__FILE__,__LINE__);
  422. $order = 0;
  423. if (Database::num_rows($res)>0) {
  424. $row = Database::fetch_row($res);
  425. $order = $row[0]+1;
  426. }
  427. $sql = "INSERT INTO $t_sf
  428. SET field_type = '$fieldtype',
  429. field_variable = '$fieldvarname',
  430. field_display_text = '$fieldtitle',
  431. field_order = '$order',
  432. tms = FROM_UNIXTIME($time)";
  433. $result = Database::query($sql,__FILE__,__LINE__);
  434. $field_id=Database::get_last_insert_id();
  435. }
  436. return $field_id;
  437. }
  438. /**
  439. * Update an extra field value for a given session
  440. * @param integer Course ID
  441. * @param string Field variable name
  442. * @param string Field value
  443. * @return boolean true if field updated, false otherwise
  444. */
  445. public static function update_session_extra_field_value ($session_id,$fname,$fvalue='') {
  446. $t_sf = Database::get_main_table(TABLE_MAIN_SESSION_FIELD);
  447. $t_sfv = Database::get_main_table(TABLE_MAIN_SESSION_FIELD_VALUES);
  448. $fname = Database::escape_string($fname);
  449. $session_id = (int)$session_id;
  450. $fvalues = '';
  451. if(is_array($fvalue))
  452. {
  453. foreach($fvalue as $val)
  454. {
  455. $fvalues .= Database::escape_string($val).';';
  456. }
  457. if(!empty($fvalues))
  458. {
  459. $fvalues = substr($fvalues,0,-1);
  460. }
  461. }
  462. else
  463. {
  464. $fvalues = Database::escape_string($fvalue);
  465. }
  466. $sqlsf = "SELECT * FROM $t_sf WHERE field_variable='$fname'";
  467. $ressf = Database::query($sqlsf,__FILE__,__LINE__);
  468. if(Database::num_rows($ressf)==1)
  469. { //ok, the field exists
  470. // Check if enumerated field, if the option is available
  471. $rowsf = Database::fetch_array($ressf);
  472. $tms = time();
  473. $sqlsfv = "SELECT * FROM $t_sfv WHERE session_id = '$session_id' AND field_id = '".$rowsf['id']."' ORDER BY id";
  474. $ressfv = Database::query($sqlsfv,__FILE__,__LINE__);
  475. $n = Database::num_rows($ressfv);
  476. if ($n>1) {
  477. //problem, we already have to values for this field and user combination - keep last one
  478. while($rowsfv = Database::fetch_array($ressfv))
  479. {
  480. if($n > 1)
  481. {
  482. $sqld = "DELETE FROM $t_sfv WHERE id = ".$rowsfv['id'];
  483. $resd = Database::query($sqld,__FILE__,__LINE__);
  484. $n--;
  485. }
  486. $rowsfv = Database::fetch_array($ressfv);
  487. if($rowsfv['field_value'] != $fvalues)
  488. {
  489. $sqlu = "UPDATE $t_sfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowsfv['id'];
  490. $resu = Database::query($sqlu,__FILE__,__LINE__);
  491. return($resu?true:false);
  492. }
  493. return true;
  494. }
  495. } else if ($n==1) {
  496. //we need to update the current record
  497. $rowsfv = Database::fetch_array($ressfv);
  498. if($rowsfv['field_value'] != $fvalues)
  499. {
  500. $sqlu = "UPDATE $t_sfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowsfv['id'];
  501. //error_log('UM::update_extra_field_value: '.$sqlu);
  502. $resu = Database::query($sqlu,__FILE__,__LINE__);
  503. return($resu?true:false);
  504. }
  505. return true;
  506. } else {
  507. $sqli = "INSERT INTO $t_sfv (session_id,field_id,field_value,tms) " .
  508. "VALUES ('$session_id',".$rowsf['id'].",'$fvalues',FROM_UNIXTIME($tms))";
  509. //error_log('UM::update_extra_field_value: '.$sqli);
  510. $resi = Database::query($sqli,__FILE__,__LINE__);
  511. return($resi?true:false);
  512. }
  513. } else {
  514. return false; //field not found
  515. }
  516. }
  517. /**
  518. * Checks the relationship between a session and a course.
  519. * @param int $session_id
  520. * @param int $course_id
  521. * @return bool Returns TRUE if the session and the course are related, FALSE otherwise.
  522. * */
  523. public static function relation_session_course_exist ($session_id, $course_id) {
  524. $tbl_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  525. $return_value = false;
  526. $sql= "SELECT course_code FROM $tbl_session_course WHERE id_session = ".Database::escape_string($session_id)." AND course_code = '".Database::escape_string($course_id)."'";
  527. $result = Database::query($sql, __FILE__, __LINE__);
  528. $num = Database::num_rows($result);
  529. if ($num>0) {
  530. $return_value = true;
  531. }
  532. return $return_value;
  533. }
  534. /**
  535. * Get the session information by name
  536. * @param string session name
  537. * @return mixed false if the session does not exist, array if the session exist
  538. * */
  539. public static function get_session_by_name ($session_name) {
  540. $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
  541. $sql = 'SELECT id, id_coach, date_start, date_end FROM '.$tbl_session.' WHERE name="'.Database::escape_string($session_name).'"';
  542. $result = Database::query($sql, __FILE__, __LINE__);
  543. $num = Database::num_rows($result);
  544. if ($num>0){
  545. return Database::fetch_array($result);
  546. } else {
  547. return false;
  548. }
  549. }
  550. }