system_announcements.lib.php 25 KB

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  1. <?php
  2. /* For licensing terms, see /license.txt */
  3. /**
  4. * @package chamilo.library
  5. */
  6. /**
  7. * Code
  8. */
  9. /**
  10. * This is the system announcements library for Dokeos.
  11. *
  12. * @package chamilo.library
  13. */
  14. class SystemAnnouncementManager {
  15. CONST VISIBLE_GUEST = 1;
  16. CONST VISIBLE_STUDENT = 2;
  17. CONST VISIBLE_TEACHER = 3;
  18. /**
  19. * Displays all announcements
  20. * @param int $visible VISIBLE_GUEST, VISIBLE_STUDENT or VISIBLE_TEACHER
  21. * @param int $id The identifier of the announcement to display
  22. */
  23. public static function display_announcements($visible, $id = -1) {
  24. $user_selected_language = api_get_interface_language();
  25. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  26. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  27. $temp_user_groups = GroupPortalManager::get_groups_by_user(api_get_user_id(),0);
  28. $groups =array();
  29. foreach ($temp_user_groups as $user_group) {
  30. $groups = array_merge($groups, array($user_group['id']));
  31. $groups = array_merge($groups, GroupPortalManager::get_parent_groups($user_group['id']));
  32. }
  33. //checks if tables exists to not break platform not updated
  34. $ann_group_db_ok =false;
  35. if( Database::num_rows(Database::query("SHOW TABLES LIKE 'announcement_rel_group'")) > 0)
  36. $ann_group_db_ok =true;
  37. $groups_string = '('.implode($groups,',').')';
  38. $sql = "SELECT *, DATE_FORMAT(date_start,'%d-%m-%Y %h:%i:%s') AS display_date"
  39. ." FROM $db_table"
  40. ." WHERE (lang='$user_selected_language'"
  41. ." OR lang IS NULL)"
  42. ." AND ((NOW() BETWEEN date_start AND date_end) OR date_end='0000-00-00') ";
  43. switch ($visible) {
  44. case self::VISIBLE_GUEST :
  45. $sql .= " AND visible_guest = 1 ";
  46. break;
  47. case self::VISIBLE_STUDENT :
  48. $sql .= " AND visible_student = 1 ";
  49. break;
  50. case self::VISIBLE_TEACHER :
  51. $sql .= " AND visible_teacher = 1 ";
  52. break;
  53. }
  54. if (count($groups) > 0 and $ann_group_db_ok ) {
  55. $sql .= " OR id IN (SELECT announcement_id FROM $tbl_announcement_group "
  56. ." WHERE group_id in $groups_string) ";
  57. }
  58. global $_configuration;
  59. $current_access_url_id = 1;
  60. if ($_configuration['multiple_access_urls']) {
  61. $current_access_url_id = api_get_current_access_url_id();
  62. }
  63. $sql .= " AND access_url_id = '$current_access_url_id' ";
  64. $sql .= " ORDER BY date_start DESC LIMIT 0,7";
  65. $announcements = Database::query($sql);
  66. if (Database::num_rows($announcements) > 0) {
  67. $query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
  68. $query_string = ereg_replace('&$', '', $query_string);
  69. $url = api_get_self();
  70. echo '<div class="system_announcements">';
  71. echo '<h3>'.get_lang('SystemAnnouncements').'</h3>';
  72. echo '<div style="margin:10px;text-align:right;"><a href="news_list.php">'.get_lang('More').'</a></div>';
  73. while ($announcement = Database::fetch_object($announcements)) {
  74. if ($id != $announcement->id) {
  75. if (strlen($query_string) > 0) {
  76. $show_url = 'news_list.php#'.$announcement->id;
  77. } else {
  78. $show_url = 'news_list.php#'.$announcement->id;
  79. }
  80. $display_date = api_convert_and_format_date($announcement->display_date, DATE_FORMAT_LONG);
  81. echo '<a name="'.$announcement->id.'"></a>
  82. <div class="system_announcement">
  83. <div class="system_announcement_title"><a name="ann'.$announcement->id.'" href="'.$show_url.'">'.$announcement->title.'</a></div><div class="system_announcement_date">'.$display_date.'</div>
  84. </div>';
  85. } else {
  86. echo '<div class="system_announcement">
  87. <div class="system_announcement_title">'
  88. .$announcement->display_date.'
  89. <a name="ann'.$announcement->id.'" href="'.$url.'?'.$query_string.'#ann'.$announcement->id.'">'.$announcement->title.'</a>
  90. </div>';
  91. }
  92. echo '<br />';
  93. }
  94. echo '</div>';
  95. }
  96. return;
  97. }
  98. public static function display_all_announcements($visible, $id = -1, $start = 0,$user_id='') {
  99. $user_selected_language = api_get_interface_language();
  100. $start = intval($start);
  101. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  102. $temp_user_groups = GroupPortalManager::get_groups_by_user(api_get_user_id(),0);
  103. $groups =array();
  104. foreach ($temp_user_groups as $user_group) {
  105. $groups = array_merge($groups, array($user_group['id']));
  106. $groups = array_merge($groups, GroupPortalManager::get_parent_groups($user_group['id']));
  107. }
  108. //checks if tables exists to not break platform not updated
  109. $ann_group_db_ok =false;
  110. if( Database::num_rows(Database::query("SHOW TABLES LIKE 'announcement_rel_group'")) > 0)
  111. $ann_group_db_ok =true;
  112. $groups_string = '('.implode($groups,',').')';
  113. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  114. $now = api_get_utc_datetime();
  115. $sql = "SELECT * FROM ".$db_table."
  116. WHERE ( lang = '$user_selected_language' OR lang IS NULL) AND ( '$now' >= date_start AND '$now' <= date_end) ";
  117. switch ($visible) {
  118. case self::VISIBLE_GUEST :
  119. $sql .= " AND visible_guest = 1 ";
  120. break;
  121. case self::VISIBLE_STUDENT :
  122. $sql .= " AND visible_student = 1 ";
  123. break;
  124. case self::VISIBLE_TEACHER :
  125. $sql .= " AND visible_teacher = 1 ";
  126. break;
  127. }
  128. if (count($groups) > 0 and $ann_group_db_ok ) {
  129. $sql .= " OR id IN (SELECT announcement_id FROM $tbl_announcement_group
  130. WHERE group_id in $groups_string) ";
  131. }
  132. if (api_is_multiple_url_enabled()) {
  133. $current_access_url_id = api_get_current_access_url_id();
  134. $sql .= " AND access_url_id IN ('1', '$current_access_url_id')";
  135. }
  136. if(!isset($_GET['start']) || $_GET['start'] == 0) {
  137. $sql .= " ORDER BY date_start DESC LIMIT ".$start.",20";
  138. } else {
  139. $sql .= " ORDER BY date_start DESC LIMIT ".($start+1).",20";
  140. }
  141. $announcements = Database::query($sql);
  142. $content = '';
  143. if (Database::num_rows($announcements) > 0) {
  144. $query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
  145. $query_string = ereg_replace('&$', '', $query_string);
  146. $url = api_get_self();
  147. $content .= '<div class="system_announcements">';
  148. $content .= '<h3>'.get_lang('SystemAnnouncements').'</h3>';
  149. $content .= '<table align="center">';
  150. $content .= '<tr>';
  151. $content .= '<td>';
  152. $content .= SystemAnnouncementManager :: display_arrow($user_id);
  153. $content .= '</td>';
  154. $content .= '</tr>';
  155. $content .= '</table>';
  156. $content .= '<table align="center" border="0" width="900px">';
  157. while ($announcement = Database::fetch_object($announcements)) {
  158. $display_date = api_convert_and_format_date($announcement->display_date, DATE_FORMAT_LONG);
  159. $content .= '<tr><td>';
  160. $content .= '<a name="'.$announcement->id.'"></a>
  161. <div class="system_announcement">
  162. <h2>'.$announcement->title.'</h2><div class="system_announcement_date">'.$display_date.'</div>
  163. <br />
  164. <div class="system_announcement_content">'
  165. .$announcement->content.'
  166. </div>
  167. </div><br />';
  168. $content .= '</tr></td>';
  169. }
  170. $content .= '</table>';
  171. $content .= '<table align="center">';
  172. $content .= '<tr>';
  173. $content .= '<td>';
  174. $content .= SystemAnnouncementManager :: display_arrow($user_id);
  175. $content .= '</td>';
  176. $content .= '</tr>';
  177. $content .= '</table>';
  178. $content .= '</div>';
  179. }
  180. return $content;
  181. }
  182. public static function display_arrow($user_id) {
  183. $start = (int)$_GET['start'];
  184. $nb_announcement = SystemAnnouncementManager :: count_nb_announcement($start,$user_id);
  185. $next = ((int)$_GET['start']+19);
  186. $prev = ((int)$_GET['start']-19);
  187. $content = '';
  188. if(!isset($_GET['start']) || $_GET['start'] == 0) {
  189. if($nb_announcement > 20) {
  190. $content .= '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
  191. }
  192. } else {
  193. echo '<a href="news_list.php?start='.$prev.'"> << '.get_lang('Prev').'</a>';
  194. if ($nb_announcement > 20) {
  195. $content .= '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
  196. }
  197. }
  198. return $content;
  199. }
  200. public static function count_nb_announcement($start = 0, $user_id = '') {
  201. $start = intval($start);
  202. $visibility = api_is_allowed_to_create_course() ? self::VISIBLE_TEACHER : self::VISIBLE_STUDENT;
  203. $user_selected_language = api_get_interface_language();
  204. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  205. $sql = 'SELECT id FROM '.$db_table.' WHERE (lang="'.$user_selected_language.'" OR lang IS NULL) ';
  206. if (isset($user_id)) {
  207. switch ($visibility) {
  208. case self::VISIBLE_GUEST :
  209. $sql .= " AND visible_guest = 1 ";
  210. break;
  211. case self::VISIBLE_STUDENT :
  212. $sql .= " AND visible_student = 1 ";
  213. break;
  214. case self::VISIBLE_TEACHER :
  215. $sql .= " AND visible_teacher = 1 ";
  216. break;
  217. }
  218. }
  219. global $_configuration;
  220. $current_access_url_id = 1;
  221. if ($_configuration['multiple_access_urls']) {
  222. $current_access_url_id = api_get_current_access_url_id();
  223. }
  224. $sql .= " AND access_url_id = '$current_access_url_id' ";
  225. $sql .= 'LIMIT '.$start.',21';
  226. $announcements = Database::query($sql);
  227. $i = 0;
  228. while($rows = Database::fetch_array($announcements)) {
  229. $i++;
  230. }
  231. return $i;
  232. }
  233. /**
  234. * Get all announcements
  235. * @return array An array with all available system announcements (as php
  236. * objects)
  237. */
  238. public static function get_all_announcements() {
  239. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  240. $now = api_get_utc_datetime();
  241. $sql = "SELECT *, IF( '$now' >= date_start AND '$now' <= date_end, '1', '0') AS visible FROM $db_table";
  242. global $_configuration;
  243. $current_access_url_id = 1;
  244. if ($_configuration['multiple_access_urls']) {
  245. $current_access_url_id = api_get_current_access_url_id();
  246. }
  247. $sql .= " WHERE access_url_id = '$current_access_url_id' ";
  248. $sql .= " ORDER BY date_start ASC";
  249. $announcements = Database::query($sql);
  250. $all_announcements = array();
  251. while ($announcement = Database::fetch_object($announcements)) {
  252. $all_announcements[] = $announcement;
  253. }
  254. return $all_announcements;
  255. }
  256. /**
  257. * Adds an announcement to the database
  258. * @param string Title of the announcement
  259. * @param string Content of the announcement
  260. * @param string Start date (YYYY-MM-DD HH:II: SS)
  261. * @param string End date (YYYY-MM-DD HH:II: SS)
  262. * @param int Whether the announcement should be visible to teachers (1) or not (0)
  263. * @param int Whether the announcement should be visible to students (1) or not (0)
  264. * @param int Whether the announcement should be visible to anonymous users (1) or not (0)
  265. * @param string The language for which the announvement should be shown. Leave null for all langages
  266. * @param int Whether to send an e-mail to all users (1) or not (0)
  267. * @return mixed insert_id on success, false on failure
  268. */
  269. public static function add_announcement($title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0, $lang = null, $send_mail = 0, $add_to_calendar = false ) {
  270. $original_content = $content;
  271. $a_dateS = explode(' ',$date_start);
  272. $a_arraySD = explode('-',$a_dateS[0]);
  273. $a_arraySH = explode(':',$a_dateS[1]);
  274. $date_start_to_compare = array_merge($a_arraySD,$a_arraySH);
  275. $a_dateE = explode(' ',$date_end);
  276. $a_arrayED = explode('-',$a_dateE[0]);
  277. $a_arrayEH = explode(':',$a_dateE[1]);
  278. $date_end_to_compare = array_merge($a_arrayED,$a_arrayEH);
  279. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  280. if (!checkdate($date_start_to_compare[1], $date_start_to_compare[2], $date_start_to_compare[0])) {
  281. Display :: display_normal_message(get_lang('InvalidStartDate'));
  282. return false;
  283. }
  284. if (($date_end_to_compare[1] || $date_end_to_compare[2] || $date_end_to_compare[0]) && !checkdate($date_end_to_compare[1], $date_end_to_compare[2], $date_end_to_compare[0])) {
  285. Display :: display_normal_message(get_lang('InvalidEndDate'));
  286. return false;
  287. }
  288. if( strlen(trim($title)) == 0) {
  289. Display::display_normal_message(get_lang('InvalidTitle'));
  290. return false;
  291. }
  292. $start = api_get_utc_datetime($date_start);
  293. $end = api_get_utc_datetime($date_end);
  294. $title = Database::escape_string($title);
  295. $content = Database::escape_string($content);
  296. //Fixing urls that are sent by email
  297. $content = str_replace('src=\"/home/', 'src=\"'.api_get_path(WEB_PATH).'home/', $content);
  298. $content = str_replace('file=/home/', 'file='.api_get_path(WEB_PATH).'home/', $content);
  299. $langsql = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
  300. global $_configuration;
  301. $current_access_url_id = 1;
  302. if ($_configuration['multiple_access_urls']) {
  303. $current_access_url_id = api_get_current_access_url_id();
  304. }
  305. $sql = "INSERT INTO ".$db_table." (title,content,date_start,date_end,visible_teacher,visible_student,visible_guest, lang, access_url_id)
  306. VALUES ('".$title."','".$content."','".$start."','".$end."','".$visible_teacher."','".$visible_student."','".$visible_guest."',".$langsql.", ".$current_access_url_id.")";
  307. if ($send_mail==1) {
  308. SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student, $lang);
  309. }
  310. $res = Database::query($sql);
  311. if ($res === false) {
  312. Debug::log_s(mysql_error());
  313. return false;
  314. }
  315. if ($add_to_calendar) {
  316. require_once 'calendar.lib.php';
  317. $agenda_id = agenda_add_item($title, $original_content, $date_start, $date_end);
  318. }
  319. return Database::insert_id();
  320. }
  321. /**
  322. * Makes the announcement id visible only for groups in groups_array
  323. * @param int announcement id
  324. * @param array array of group id
  325. **/
  326. public static function announcement_for_groups($announcement_id, $group_array){
  327. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  328. //first delete all group associations for this announcement
  329. $res = Database::query("DELETE FROM $tbl_announcement_group where announcement_id=".intval($announcement_id));
  330. if ($res === false) {
  331. Debug::log_s(mysql_error());
  332. return false;
  333. }
  334. foreach ($group_array as $group_id) {
  335. if (intval($group_id) != 0 ) {
  336. $res = Database::query("INSERT into $tbl_announcement_group set announcement_id=".intval($announcement_id)
  337. .", group_id=".intval($group_id));
  338. if ($res === false) {
  339. Debug::log_s(mysql_error());
  340. return false;
  341. }
  342. }
  343. }
  344. return true;
  345. }
  346. /**
  347. * Gets the groups of this announce
  348. * @param int announcement id
  349. * @return array array of group id
  350. **/
  351. public static function get_announcement_groups($announcement_id){
  352. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  353. $tbl_group = Database :: get_main_table(TABLE_MAIN_GROUP);
  354. //first delete all group associations for this announcement
  355. $res = Database::query("SELECT g.id as group_id , g.name as group_name FROM $tbl_group g , $tbl_announcement_group ag"
  356. ." WHERE announcement_id=".intval($announcement_id)
  357. ." AND ag.group_id = g.id");
  358. $groups = Database::fetch_array($res);
  359. return $groups;
  360. }
  361. /**
  362. * Updates an announcement to the database
  363. * @param integer $id : id of the announcement
  364. * @param string $title : title of the announcement
  365. * @param string $content : content of the announcement
  366. * @param array $date_start: start date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
  367. * @param array $date_end : end date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
  368. * @return bool True on success, false on failure
  369. */
  370. public static function update_announcement($id, $title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0,$lang=null, $send_mail=0) {
  371. $a_dateS = explode(' ',$date_start);
  372. $a_arraySD = explode('-',$a_dateS[0]);
  373. $a_arraySH = explode(':',$a_dateS[1]);
  374. $date_start_to_compare = array_merge($a_arraySD,$a_arraySH);
  375. $a_dateE = explode(' ',$date_end);
  376. $a_arrayED = explode('-',$a_dateE[0]);
  377. $a_arrayEH = explode(':',$a_dateE[1]);
  378. $date_end_to_compare = array_merge($a_arrayED,$a_arrayEH);
  379. $langsql = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
  380. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  381. if (!checkdate($date_start_to_compare[1], $date_start_to_compare[2], $date_start_to_compare[0])) {
  382. Display :: display_normal_message(get_lang('InvalidStartDate'));
  383. return false;
  384. }
  385. if (($date_end_to_compare[1] || $date_end_to_compare[2] || $date_end_to_compare[0]) && !checkdate($date_end_to_compare[1], $date_end_to_compare[2], $date_end_to_compare[0])) {
  386. Display :: display_normal_message(get_lang('InvalidEndDate'));
  387. return false;
  388. }
  389. if( strlen(trim($title)) == 0) {
  390. Display::display_normal_message(get_lang('InvalidTitle'));
  391. return false;
  392. }
  393. $start = api_get_utc_datetime($date_start);
  394. $end = api_get_utc_datetime($date_end);
  395. $title = Database::escape_string($title);
  396. $content = Database::escape_string($content);
  397. //Fixing urls that are sent by email
  398. $content = str_replace('src=\"/home/', 'src=\"'.api_get_path(WEB_PATH).'home/', $content);
  399. $content = str_replace('file=/home/', 'file='.api_get_path(WEB_PATH).'home/', $content);
  400. $id = intval($id);
  401. $sql = "UPDATE ".$db_table." SET lang=$langsql,title='".$title."',content='".$content."',date_start='".$start."',date_end='".$end."', ";
  402. $sql .= " visible_teacher = '".$visible_teacher."', visible_student = '".$visible_student."', visible_guest = '".$visible_guest."' , access_url_id = '".api_get_current_access_url_id()."' WHERE id = ".$id;
  403. if ($send_mail==1) {
  404. SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student, $lang);
  405. }
  406. $res = Database::query($sql);
  407. if ($res === false) {
  408. Debug::log_s(mysql_error());
  409. return false;
  410. }
  411. return true;
  412. }
  413. /**
  414. * Deletes an announcement
  415. * @param int $id The identifier of the announcement that should be
  416. * @return bool True on success, false on failure
  417. */
  418. public static function delete_announcement($id) {
  419. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  420. $id = intval($id);
  421. $sql = "DELETE FROM ".$db_table." WHERE id =".$id;
  422. $res = Database::query($sql);
  423. if ($res === false) {
  424. Debug::log_s(mysql_error());
  425. return false;
  426. }
  427. return true;
  428. }
  429. /**
  430. * Gets an announcement
  431. * @param int $id The identifier of the announcement that should be
  432. * @return object Object of class StdClass or the required class, containing the query result row
  433. */
  434. public static function get_announcement($id) {
  435. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  436. $id = intval($id);
  437. $sql = "SELECT * FROM ".$db_table." WHERE id = ".$id;
  438. $announcement = Database::fetch_object(Database::query($sql));
  439. return $announcement;
  440. }
  441. /**
  442. * Change the visibility of an announcement
  443. * @param int $announcement_id
  444. * @param int $user For who should the visibility be changed (possible values are VISIBLE_TEACHER, VISIBLE_STUDENT, VISIBLE_GUEST)
  445. * @return bool True on success, false on failure
  446. */
  447. public static function set_visibility($announcement_id, $user, $visible) {
  448. $db_table = Database::get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  449. $visible = intval($visible);
  450. $announcement_id = intval($announcement_id);
  451. if (!in_array($user, array(self::VISIBLE_GUEST, self::VISIBLE_STUDENT, self::VISIBLE_TEACHER))) {
  452. return false;
  453. }
  454. $field = ($user == self::VISIBLE_TEACHER ? 'visible_teacher' : ($user == self::VISIBLE_STUDENT ? 'visible_student' : 'visible_guest'));
  455. $sql = "UPDATE ".$db_table." SET ".$field." = '".$visible."' WHERE id='".$announcement_id."'";
  456. $res = Database::query($sql);
  457. if ($res === false) {
  458. Debug::log_s(mysql_error());
  459. return false;
  460. }
  461. return true;
  462. }
  463. /**
  464. * Send a system announcement by e-mail to all teachers/students depending on parameters
  465. * @param string Title
  466. * @param string Content
  467. * @param int Whether to send to all teachers (1) or not (0)
  468. * @param int Whether to send to all students (1) or not (0)
  469. * @param string Language (optional, considered for all languages if left empty)
  470. * @return bool True if the message was sent or there was no destination matching. False on database or e-mail sending error.
  471. */
  472. public static function send_system_announcement_by_email($title, $content, $teacher, $student, $language = null) {
  473. global $charset;
  474. global $_configuration;
  475. $current_access_url_id = api_get_current_access_url_id();
  476. if ($_configuration['multiple_access_urls']) {
  477. $url_rel_user = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
  478. $url_condition = " INNER JOIN $url_rel_user uu ON uu.user_id = u.user_id ";
  479. }
  480. $user_table = Database :: get_main_table(TABLE_MAIN_USER);
  481. if ($teacher <> 0 AND $student == 0) {
  482. $sql = "SELECT DISTINCT u.user_id FROM $user_table u $url_condition WHERE status = '1' ";
  483. }
  484. if ($teacher == 0 AND $student <> 0) {
  485. $sql = "SELECT DISTINCT u.user_id FROM $user_table u $url_condition WHERE status = '5' ";
  486. }
  487. if ($teacher<> 0 AND $student <> 0) {
  488. $sql = "SELECT DISTINCT u.user_id FROM $user_table u $url_condition WHERE 1 = 1 ";
  489. }
  490. if (!empty($language)) { //special condition because language was already treated for SQL insert before
  491. $sql .= " AND language = '".Database::escape_string($language)."' ";
  492. }
  493. if ($_configuration['multiple_access_urls']) {
  494. $sql .= " AND access_url_id = '".$current_access_url_id."' ";
  495. }
  496. //Sent to active users
  497. $sql .= " AND email <>'' AND active = 1 ";
  498. if ((empty($teacher) or $teacher == '0') AND (empty($student) or $student == '0')) {
  499. return true;
  500. }
  501. $result = Database::query($sql);
  502. if ($result === false) {
  503. return false;
  504. }
  505. $title = api_html_entity_decode(stripslashes($title), ENT_QUOTES, $charset);
  506. $content = api_html_entity_decode(stripslashes(str_replace(array('\r\n', '\n', '\r'),'', $content)), ENT_QUOTES, $charset);
  507. $message_sent = false;
  508. while ($row = Database::fetch_array($result,'ASSOC')) {
  509. MessageManager::send_message_simple($row['user_id'], $title, $content);
  510. $message_sent = true;
  511. }
  512. return $message_sent; //true if at least one e-mail was sent
  513. }
  514. /**
  515. * Displays announcements as an slideshow
  516. * @param int $visible VISIBLE_GUEST, VISIBLE_STUDENT or VISIBLE_TEACHER
  517. * @param int $id The identifier of the announcement to display
  518. */
  519. public static function display_announcements_slider($visible, $id = null) {
  520. $user_selected_language = Database::escape_string(api_get_interface_language());
  521. $table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  522. $cut_size = 500;
  523. $now = api_get_utc_datetime();
  524. $sql = "SELECT * FROM ".$table."
  525. WHERE ( lang = '$user_selected_language' OR lang IS NULL) AND ( '$now' >= date_start AND '$now' <= date_end) ";
  526. switch ($visible) {
  527. case self::VISIBLE_GUEST :
  528. $sql .= " AND visible_guest = 1 ";
  529. break;
  530. case self::VISIBLE_STUDENT :
  531. $sql .= " AND visible_student = 1 ";
  532. break;
  533. case self::VISIBLE_TEACHER :
  534. $sql .= " AND visible_teacher = 1 ";
  535. break;
  536. }
  537. if (isset($id) && !empty($id)) {
  538. $id = intval($id);
  539. $sql .= " AND id = $id ";
  540. }
  541. if (api_is_multiple_url_enabled()) {
  542. $current_url_id = api_get_current_access_url_id();
  543. $sql .= " AND access_url_id IN ('1', '$current_url_id') ";
  544. }
  545. $sql .= " ORDER BY date_start DESC";
  546. $announcements = Database::query($sql);
  547. $html = '';
  548. if (Database::num_rows($announcements) > 0) {
  549. $html .= Display::page_header(get_lang('SystemAnnouncements'));
  550. $html .= '<div id="container-slider" class="span6"><ul id="slider">';
  551. while ($announcement = Database::fetch_object($announcements)) {
  552. $content = $announcement->content;
  553. $url = api_get_path(WEB_PATH).'news_list.php?id='.$announcement->id;
  554. if (empty($id)) {
  555. if (api_strlen(strip_tags($content)) > $cut_size) {
  556. $content = cut($announcement->content, $cut_size).' '.Display::url(get_lang('More'), $url);
  557. }
  558. }
  559. $html .= '<li><h2>'.$announcement->title.'</h2>'.$content.'</li>';
  560. }
  561. $html .= '</ul></div>';
  562. }
  563. return $html;
  564. }
  565. }