system_announcements.lib.php 24 KB

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  1. <?php
  2. /* For licensing terms, see /license.txt */
  3. require_once api_get_path(LIBRARY_PATH).'group_portal_manager.lib.php';
  4. /**
  5. * @package chamilo.library
  6. */
  7. /**
  8. * Code
  9. */
  10. define('VISIBLE_GUEST', 1);
  11. define('VISIBLE_STUDENT', 2);
  12. define('VISIBLE_TEACHER', 3);
  13. /**
  14. * This is the system announcements library for Dokeos.
  15. *
  16. * @package chamilo.library
  17. */
  18. class SystemAnnouncementManager {
  19. /**
  20. * Displays all announcements
  21. * @param int $visible VISIBLE_GUEST, VISIBLE_STUDENT or VISIBLE_TEACHER
  22. * @param int $id The identifier of the announcement to display
  23. */
  24. public static function display_announcements($visible, $id = -1) {
  25. $user_selected_language = api_get_interface_language();
  26. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  27. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  28. $temp_user_groups = GroupPortalManager::get_groups_by_user(api_get_user_id(),0);
  29. $groups =array();
  30. foreach ($temp_user_groups as $user_group) {
  31. $groups = array_merge($groups, array($user_group['id']));
  32. $groups = array_merge($groups, GroupPortalManager::get_parent_groups($user_group['id']));
  33. }
  34. //checks if tables exists to not break platform not updated
  35. $ann_group_db_ok =false;
  36. if( Database::num_rows(Database::query("SHOW TABLES LIKE 'announcement_rel_group'")) > 0)
  37. $ann_group_db_ok =true;
  38. $groups_string = '('.implode($groups,',').')';
  39. $sql = "SELECT *, DATE_FORMAT(date_start,'%d-%m-%Y %h:%i:%s') AS display_date"
  40. ." FROM $db_table"
  41. ." WHERE (lang='$user_selected_language'"
  42. ." OR lang IS NULL)"
  43. ." AND ((NOW() BETWEEN date_start AND date_end) OR date_end='0000-00-00') ";
  44. switch ($visible) {
  45. case VISIBLE_GUEST :
  46. $sql .= " AND visible_guest = 1 ";
  47. break;
  48. case VISIBLE_STUDENT :
  49. $sql .= " AND visible_student = 1 ";
  50. break;
  51. case VISIBLE_TEACHER :
  52. $sql .= " AND visible_teacher = 1 ";
  53. break;
  54. }
  55. if (count($groups) > 0 and $ann_group_db_ok ) {
  56. $sql .= " OR id IN (SELECT announcement_id FROM $tbl_announcement_group "
  57. ." WHERE group_id in $groups_string) ";
  58. }
  59. global $_configuration;
  60. $current_access_url_id = 1;
  61. if ($_configuration['multiple_access_urls']) {
  62. $current_access_url_id = api_get_current_access_url_id();
  63. }
  64. $sql .= " AND access_url_id = '$current_access_url_id' ";
  65. $sql .= " ORDER BY date_start DESC LIMIT 0,7";
  66. $announcements = Database::query($sql);
  67. if (Database::num_rows($announcements) > 0) {
  68. $query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
  69. $query_string = ereg_replace('&$', '', $query_string);
  70. $url = api_get_self();
  71. echo '<div class="system_announcements">';
  72. echo '<h3>'.get_lang('SystemAnnouncements').'</h3>';
  73. echo '<div style="margin:10px;text-align:right;"><a href="news_list.php">'.get_lang('More').'</a></div>';
  74. while ($announcement = Database::fetch_object($announcements)) {
  75. if ($id != $announcement->id) {
  76. if (strlen($query_string) > 0) {
  77. $show_url = 'news_list.php#'.$announcement->id;
  78. } else {
  79. $show_url = 'news_list.php#'.$announcement->id;
  80. }
  81. $display_date = api_convert_and_format_date($announcement->display_date, DATE_FORMAT_LONG);
  82. echo '<a name="'.$announcement->id.'"></a>
  83. <div class="system_announcement">
  84. <div class="system_announcement_title"><a name="ann'.$announcement->id.'" href="'.$show_url.'">'.$announcement->title.'</a></div><div class="system_announcement_date">'.$display_date.'</div>
  85. </div>';
  86. } else {
  87. echo '<div class="system_announcement">
  88. <div class="system_announcement_title">'
  89. .$announcement->display_date.'
  90. <a name="ann'.$announcement->id.'" href="'.$url.'?'.$query_string.'#ann'.$announcement->id.'">'.$announcement->title.'</a>
  91. </div>';
  92. }
  93. echo '<br />';
  94. }
  95. echo '</div>';
  96. }
  97. return;
  98. }
  99. public static function display_all_announcements($visible, $id = -1, $start = 0,$user_id='') {
  100. $user_selected_language = api_get_interface_language();
  101. $start = intval($start);
  102. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  103. $temp_user_groups = GroupPortalManager::get_groups_by_user(api_get_user_id(),0);
  104. $groups =array();
  105. foreach ($temp_user_groups as $user_group) {
  106. $groups = array_merge($groups, array($user_group['id']));
  107. $groups = array_merge($groups, GroupPortalManager::get_parent_groups($user_group['id']));
  108. }
  109. //checks if tables exists to not break platform not updated
  110. $ann_group_db_ok =false;
  111. if( Database::num_rows(Database::query("SHOW TABLES LIKE 'announcement_rel_group'")) > 0)
  112. $ann_group_db_ok =true;
  113. $groups_string = '('.implode($groups,',').')';
  114. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  115. $now = api_get_utc_datetime();
  116. $sql = "SELECT * FROM ".$db_table."
  117. WHERE ( lang = '$user_selected_language' OR lang IS NULL) AND ( '$now' >= date_start AND '$now' <= date_end) ";
  118. switch ($visible) {
  119. case VISIBLE_GUEST :
  120. $sql .= " AND visible_guest = 1 ";
  121. break;
  122. case VISIBLE_STUDENT :
  123. $sql .= " AND visible_student = 1 ";
  124. break;
  125. case VISIBLE_TEACHER :
  126. $sql .= " AND visible_teacher = 1 ";
  127. break;
  128. }
  129. if (count($groups) > 0 and $ann_group_db_ok ) {
  130. $sql .= " OR id IN (SELECT announcement_id FROM $tbl_announcement_group "
  131. ." WHERE group_id in $groups_string) ";
  132. }
  133. global $_configuration;
  134. $current_access_url_id = 1;
  135. if ($_configuration['multiple_access_urls']) {
  136. $current_access_url_id = api_get_current_access_url_id();
  137. }
  138. $sql .= " AND access_url_id = '$current_access_url_id' ";
  139. if(!isset($_GET['start']) || $_GET['start'] == 0) {
  140. $sql .= " ORDER BY date_start DESC LIMIT ".$start.",20";
  141. } else {
  142. $sql .= " ORDER BY date_start DESC LIMIT ".($start+1).",20";
  143. }
  144. $announcements = Database::query($sql);
  145. $content = '';
  146. if (Database::num_rows($announcements) > 0) {
  147. $query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
  148. $query_string = ereg_replace('&$', '', $query_string);
  149. $url = api_get_self();
  150. $content .= '<div class="system_announcements">';
  151. $content .= '<h3>'.get_lang('SystemAnnouncements').'</h3>';
  152. $content .= '<table align="center">';
  153. $content .= '<tr>';
  154. $content .= '<td>';
  155. $content .= SystemAnnouncementManager :: display_arrow($user_id);
  156. $content .= '</td>';
  157. $content .= '</tr>';
  158. $content .= '</table>';
  159. $content .= '<table align="center" border="0" width="900px">';
  160. while ($announcement = Database::fetch_object($announcements)) {
  161. $display_date = api_convert_and_format_date($announcement->display_date, DATE_FORMAT_LONG);
  162. $content .= '<tr><td>';
  163. $content .= '<a name="'.$announcement->id.'"></a>
  164. <div class="system_announcement">
  165. <h2>'.$announcement->title.'</h2><div class="system_announcement_date">'.$display_date.'</div>
  166. <br />
  167. <div class="system_announcement_content">'
  168. .$announcement->content.'
  169. </div>
  170. </div><br />';
  171. $content .= '</tr></td>';
  172. }
  173. $content .= '</table>';
  174. $content .= '<table align="center">';
  175. $content .= '<tr>';
  176. $content .= '<td>';
  177. $content .= SystemAnnouncementManager :: display_arrow($user_id);
  178. $content .= '</td>';
  179. $content .= '</tr>';
  180. $content .= '</table>';
  181. $content .= '</div>';
  182. }
  183. return $content;
  184. }
  185. public static function display_arrow($user_id) {
  186. $start = (int)$_GET['start'];
  187. $nb_announcement = SystemAnnouncementManager :: count_nb_announcement($start,$user_id);
  188. $next = ((int)$_GET['start']+19);
  189. $prev = ((int)$_GET['start']-19);
  190. $content = '';
  191. if(!isset($_GET['start']) || $_GET['start'] == 0) {
  192. if($nb_announcement > 20) {
  193. $content .= '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
  194. }
  195. } else {
  196. echo '<a href="news_list.php?start='.$prev.'"> << '.get_lang('Prev').'</a>';
  197. if ($nb_announcement > 20) {
  198. $content .= '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
  199. }
  200. }
  201. return $content;
  202. }
  203. public static function count_nb_announcement($start = 0, $user_id = '') {
  204. $start = intval($start);
  205. $visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
  206. $user_selected_language = api_get_interface_language();
  207. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  208. $sql = 'SELECT id FROM '.$db_table.' WHERE (lang="'.$user_selected_language.'" OR lang IS NULL) ';
  209. if (isset($user_id)) {
  210. switch ($visibility) {
  211. case VISIBLE_GUEST :
  212. $sql .= " AND visible_guest = 1 ";
  213. break;
  214. case VISIBLE_STUDENT :
  215. $sql .= " AND visible_student = 1 ";
  216. break;
  217. case VISIBLE_TEACHER :
  218. $sql .= " AND visible_teacher = 1 ";
  219. break;
  220. }
  221. }
  222. global $_configuration;
  223. $current_access_url_id = 1;
  224. if ($_configuration['multiple_access_urls']) {
  225. $current_access_url_id = api_get_current_access_url_id();
  226. }
  227. $sql .= " AND access_url_id = '$current_access_url_id' ";
  228. $sql .= 'LIMIT '.$start.',21';
  229. $announcements = Database::query($sql);
  230. $i = 0;
  231. while($rows = Database::fetch_array($announcements)) {
  232. $i++;
  233. }
  234. return $i;
  235. }
  236. /**
  237. * Get all announcements
  238. * @return array An array with all available system announcements (as php
  239. * objects)
  240. */
  241. public static function get_all_announcements() {
  242. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  243. $now = api_get_utc_datetime();
  244. $sql = "SELECT *, IF( '$now' >= date_start AND '$now' <= date_end, '1', '0') AS visible FROM $db_table";
  245. global $_configuration;
  246. $current_access_url_id = 1;
  247. if ($_configuration['multiple_access_urls']) {
  248. $current_access_url_id = api_get_current_access_url_id();
  249. }
  250. $sql .= " WHERE access_url_id = '$current_access_url_id' ";
  251. $sql .= " ORDER BY date_start ASC";
  252. $announcements = Database::query($sql);
  253. $all_announcements = array();
  254. while ($announcement = Database::fetch_object($announcements)) {
  255. $all_announcements[] = $announcement;
  256. }
  257. return $all_announcements;
  258. }
  259. /**
  260. * Adds an announcement to the database
  261. * @param string Title of the announcement
  262. * @param string Content of the announcement
  263. * @param string Start date (YYYY-MM-DD HH:II: SS)
  264. * @param string End date (YYYY-MM-DD HH:II: SS)
  265. * @param int Whether the announcement should be visible to teachers (1) or not (0)
  266. * @param int Whether the announcement should be visible to students (1) or not (0)
  267. * @param int Whether the announcement should be visible to anonymous users (1) or not (0)
  268. * @param string The language for which the announvement should be shown. Leave null for all langages
  269. * @param int Whether to send an e-mail to all users (1) or not (0)
  270. * @return mixed insert_id on success, false on failure
  271. */
  272. public static function add_announcement($title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0, $lang = null, $send_mail = 0, $add_to_calendar = false ) {
  273. $original_content = $content;
  274. $a_dateS = explode(' ',$date_start);
  275. $a_arraySD = explode('-',$a_dateS[0]);
  276. $a_arraySH = explode(':',$a_dateS[1]);
  277. $date_start_to_compare = array_merge($a_arraySD,$a_arraySH);
  278. $a_dateE = explode(' ',$date_end);
  279. $a_arrayED = explode('-',$a_dateE[0]);
  280. $a_arrayEH = explode(':',$a_dateE[1]);
  281. $date_end_to_compare = array_merge($a_arrayED,$a_arrayEH);
  282. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  283. if (!checkdate($date_start_to_compare[1], $date_start_to_compare[2], $date_start_to_compare[0])) {
  284. Display :: display_normal_message(get_lang('InvalidStartDate'));
  285. return false;
  286. }
  287. if (($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], $date_end_to_compare[0])) {
  288. Display :: display_normal_message(get_lang('InvalidEndDate'));
  289. return false;
  290. }
  291. if( strlen(trim($title)) == 0) {
  292. Display::display_normal_message(get_lang('InvalidTitle'));
  293. return false;
  294. }
  295. $start = api_get_utc_datetime($date_start);
  296. $end = api_get_utc_datetime($date_end);
  297. $title = Database::escape_string($title);
  298. $content = Database::escape_string($content);
  299. //Fixing urls that are sent by email
  300. $content = str_replace('src=\"/home/', 'src=\"'.api_get_path(WEB_PATH).'home/', $content);
  301. $content = str_replace('file=/home/', 'file='.api_get_path(WEB_PATH).'home/', $content);
  302. $langsql = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
  303. global $_configuration;
  304. $current_access_url_id = 1;
  305. if ($_configuration['multiple_access_urls']) {
  306. $current_access_url_id = api_get_current_access_url_id();
  307. }
  308. $sql = "INSERT INTO ".$db_table." (title,content,date_start,date_end,visible_teacher,visible_student,visible_guest, lang, access_url_id)
  309. VALUES ('".$title."','".$content."','".$start."','".$end."','".$visible_teacher."','".$visible_student."','".$visible_guest."',".$langsql.", ".$current_access_url_id.")";
  310. if ($send_mail==1) {
  311. SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student, $lang);
  312. }
  313. $res = Database::query($sql);
  314. if ($res === false) {
  315. Debug::log_s(mysql_error());
  316. return false;
  317. }
  318. if ($add_to_calendar) {
  319. require_once 'calendar.lib.php';
  320. $agenda_id = agenda_add_item($title, $original_content, $date_start, $date_end);
  321. }
  322. return Database::insert_id();
  323. }
  324. /**
  325. * Makes the announcement id visible only for groups in groups_array
  326. * @param int announcement id
  327. * @param array array of group id
  328. **/
  329. public static function announcement_for_groups($announcement_id, $group_array){
  330. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  331. //first delete all group associations for this announcement
  332. $res = Database::query("DELETE FROM $tbl_announcement_group where announcement_id=".intval($announcement_id));
  333. if ($res === false) {
  334. Debug::log_s(mysql_error());
  335. return false;
  336. }
  337. foreach ($group_array as $group_id) {
  338. if (intval($group_id) != 0 ) {
  339. $res = Database::query("INSERT into $tbl_announcement_group set announcement_id=".intval($announcement_id)
  340. .", group_id=".intval($group_id));
  341. if ($res === false) {
  342. Debug::log_s(mysql_error());
  343. return false;
  344. }
  345. }
  346. }
  347. return true;
  348. }
  349. /**
  350. * Gets the groups of this announce
  351. * @param int announcement id
  352. * @return array array of group id
  353. **/
  354. public static function get_announcement_groups($announcement_id){
  355. $tbl_announcement_group = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS_GROUPS);
  356. $tbl_group = Database :: get_main_table(TABLE_MAIN_GROUP);
  357. //first delete all group associations for this announcement
  358. $res = Database::query("SELECT g.id as group_id , g.name as group_name FROM $tbl_group g , $tbl_announcement_group ag"
  359. ." WHERE announcement_id=".intval($announcement_id)
  360. ." AND ag.group_id = g.id");
  361. $groups = Database::fetch_array($res);
  362. return $groups;
  363. }
  364. /**
  365. * Updates an announcement to the database
  366. * @param integer $id : id of the announcement
  367. * @param string $title : title of the announcement
  368. * @param string $content : content of the announcement
  369. * @param array $date_start: start date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
  370. * @param array $date_end : end date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
  371. * @return bool True on success, false on failure
  372. */
  373. public static function update_announcement($id, $title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0,$lang=null, $send_mail=0) {
  374. $a_dateS = explode(' ',$date_start);
  375. $a_arraySD = explode('-',$a_dateS[0]);
  376. $a_arraySH = explode(':',$a_dateS[1]);
  377. $date_start_to_compare = array_merge($a_arraySD,$a_arraySH);
  378. $a_dateE = explode(' ',$date_end);
  379. $a_arrayED = explode('-',$a_dateE[0]);
  380. $a_arrayEH = explode(':',$a_dateE[1]);
  381. $date_end_to_compare = array_merge($a_arrayED,$a_arrayEH);
  382. $langsql = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
  383. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  384. if (!checkdate($date_start_to_compare[1], $date_start_to_compare[2], $date_start_to_compare[0])) {
  385. Display :: display_normal_message(get_lang('InvalidStartDate'));
  386. return false;
  387. }
  388. if (($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], $date_end_to_compare[0])) {
  389. Display :: display_normal_message(get_lang('InvalidEndDate'));
  390. return false;
  391. }
  392. if( strlen(trim($title)) == 0) {
  393. Display::display_normal_message(get_lang('InvalidTitle'));
  394. return false;
  395. }
  396. $start = api_get_utc_datetime($date_start);
  397. $end = api_get_utc_datetime($date_end);
  398. $title = Database::escape_string($title);
  399. $content = Database::escape_string($content);
  400. //Fixing urls that are sent by email
  401. $content = str_replace('src=\"/home/', 'src=\"'.api_get_path(WEB_PATH).'home/', $content);
  402. $content = str_replace('file=/home/', 'file='.api_get_path(WEB_PATH).'home/', $content);
  403. $id = intval($id);
  404. $sql = "UPDATE ".$db_table." SET lang=$langsql,title='".$title."',content='".$content."',date_start='".$start."',date_end='".$end."', ";
  405. $sql .= " visible_teacher = '".$visible_teacher."', visible_student = '".$visible_student."', visible_guest = '".$visible_guest."' , access_url_id = '".api_get_current_access_url_id()."' WHERE id = ".$id;
  406. if ($send_mail==1) {
  407. SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student, $lang);
  408. }
  409. $res = Database::query($sql);
  410. if ($res === false) {
  411. Debug::log_s(mysql_error());
  412. return false;
  413. }
  414. return true;
  415. }
  416. /**
  417. * Deletes an announcement
  418. * @param int $id The identifier of the announcement that should be
  419. * @return bool True on success, false on failure
  420. */
  421. public static function delete_announcement($id) {
  422. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  423. $id = intval($id);
  424. $sql = "DELETE FROM ".$db_table." WHERE id =".$id;
  425. $res = Database::query($sql);
  426. if ($res === false) {
  427. Debug::log_s(mysql_error());
  428. return false;
  429. }
  430. return true;
  431. }
  432. /**
  433. * Gets an announcement
  434. * @param int $id The identifier of the announcement that should be
  435. * @return object Object of class StdClass or the required class, containing the query result row
  436. */
  437. public static function get_announcement($id) {
  438. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  439. $id = intval($id);
  440. $sql = "SELECT * FROM ".$db_table." WHERE id = ".$id;
  441. $announcement = Database::fetch_object(Database::query($sql));
  442. return $announcement;
  443. }
  444. /**
  445. * Change the visibility of an announcement
  446. * @param int $announcement_id
  447. * @param int $user For who should the visibility be changed (possible values are VISIBLE_TEACHER, VISIBLE_STUDENT, VISIBLE_GUEST)
  448. * @return bool True on success, false on failure
  449. */
  450. public static function set_visibility($announcement_id, $user, $visible) {
  451. $db_table = Database::get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  452. $visible = intval($visible);
  453. $announcement_id = intval($announcement_id);
  454. $field = ($user == VISIBLE_TEACHER ? 'visible_teacher' : ($user == 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 $_user;
  474. global $_setting;
  475. global $charset;
  476. global $_configuration;
  477. $current_access_url_id = 1;
  478. if ($_configuration['multiple_access_urls']) {
  479. $current_access_url_id = api_get_current_access_url_id();
  480. $url_rel_user = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
  481. $url_condition = " INNER JOIN $url_rel_user uu ON uu.user_id = u.user_id ";
  482. }
  483. $user_table = Database :: get_main_table(TABLE_MAIN_USER);
  484. if ($teacher <> 0 AND $student == 0) {
  485. $sql = "SELECT firstname, lastname, email, status FROM $user_table u $url_condition WHERE email<>'' AND status = '1' AND active = 1";
  486. }
  487. if ($teacher == 0 AND $student <> 0) {
  488. $sql = "SELECT firstname, lastname, email, status FROM $user_table u $url_condition WHERE email<>'' AND status = '5' AND active = 1 ";
  489. }
  490. if ($teacher<> 0 AND $student <> 0) {
  491. $sql = "SELECT firstname, lastname, email FROM $user_table u $url_condition WHERE email<>'' AND active = 1 ";
  492. }
  493. if (!empty($language)) { //special condition because language was already treated for SQL insert before
  494. $sql .= " AND language = '".Database::escape_string($language)."' ";
  495. }
  496. if ($_configuration['multiple_access_urls']) {
  497. $sql .= " AND access_url_id = '".$current_access_url_id."' ";
  498. }
  499. if ((empty($teacher) or $teacher == '0') AND (empty($student) or $student == '0')) {
  500. return true;
  501. }
  502. $result = Database::query($sql);
  503. if ($result === false) {
  504. return false;
  505. }
  506. while($row = Database::fetch_array($result,'ASSOC')) {
  507. $res = @api_mail_html(api_get_person_name($row['firstname'], $row['lastname'], null, PERSON_NAME_EMAIL_ADDRESS), $row['email'], api_html_entity_decode(stripslashes($title), ENT_QUOTES, $charset), api_html_entity_decode(stripslashes(str_replace(array('\r\n', '\n', '\r'),'',$content)), ENT_QUOTES, $charset), api_get_person_name(api_get_setting('administratorName'), api_get_setting('administratorSurname'), null, PERSON_NAME_EMAIL_ADDRESS), api_get_setting('emailAdministrator')) || $res;
  508. }
  509. return $res; //true if at least one e-mail was sent
  510. }
  511. /**
  512. * Displays announcements as an slideshow
  513. * @param int $visible VISIBLE_GUEST, VISIBLE_STUDENT or VISIBLE_TEACHER
  514. * @param int $id The identifier of the announcement to display
  515. */
  516. public static function display_announcements_slider($visible, $id = -1) {
  517. $user_selected_language = Database::escape_string(api_get_interface_language());
  518. $db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
  519. $now = api_get_utc_datetime();
  520. $sql = "SELECT * FROM ".$db_table."
  521. WHERE ( lang = '$user_selected_language' OR lang IS NULL) AND ( '$now' >= date_start AND '$now' <= date_end) ";
  522. switch ($visible) {
  523. case VISIBLE_GUEST :
  524. $sql .= " AND visible_guest = 1 ";
  525. break;
  526. case VISIBLE_STUDENT :
  527. $sql .= " AND visible_student = 1 ";
  528. break;
  529. case VISIBLE_TEACHER :
  530. $sql .= " AND visible_teacher = 1 ";
  531. break;
  532. }
  533. $sql .= " ORDER BY date_start DESC LIMIT 0,7";
  534. $announcements = Database::query($sql);
  535. $html = '';
  536. if (Database::num_rows($announcements) > 0) {
  537. $query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
  538. $query_string = ereg_replace('&$', '', $query_string);
  539. $url = api_get_self();
  540. $html .= '<div class="system_announcements">';
  541. $html .= '<h3>'.get_lang('SystemAnnouncements').'</h3>';
  542. //echo '<div style="margin:10px;text-align:right;"><a href="news_list.php">'.get_lang('More').'</a></div>';
  543. $html .= '<div id="container-slider">
  544. <ul id="slider">';
  545. while ($announcement = Database::fetch_object($announcements)) {
  546. if ($id != $announcement->id) {
  547. $html .= '<li><h1>'.$announcement->title.'</h1>'.$announcement->content.'</li>';
  548. } else {
  549. $html .= '<li><h1>'.$announcement->title.'</h1>'.$announcement->content.'</li>';
  550. }
  551. }
  552. $html .= '</ul></div></div>';
  553. }
  554. return $html;
  555. }
  556. }