sessionmanager.lib.php 22 KB

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