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399 lines
14 KiB
399 lines
14 KiB
<?php
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/* For licensing terms, see /dokeos_license.txt */
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define('VISIBLE_GUEST', 1);
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define('VISIBLE_STUDENT', 2);
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define('VISIBLE_TEACHER', 3);
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/**
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==============================================================================
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* This is the system announcements library for Dokeos.
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*
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* @package dokeos.library
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==============================================================================
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*/
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class SystemAnnouncementManager
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{
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/**
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* Displays all announcements
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* @param int $visible VISIBLE_GUEST, VISIBLE_STUDENT or VISIBLE_TEACHER
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* @param int $id The identifier of the announcement to display
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*/
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function display_announcements($visible, $id = -1)
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{
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$user_selected_language = api_get_interface_language();
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$sql = "SELECT *, DATE_FORMAT(date_start,'%d-%m-%Y') AS display_date FROM ".$db_table." WHERE (lang='$user_selected_language' OR lang IS NULL) AND ((NOW() BETWEEN date_start AND date_end) OR date_end='0000-00-00') ";
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switch ($visible)
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{
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case VISIBLE_GUEST :
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$sql .= " AND visible_guest = 1 ";
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break;
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case VISIBLE_STUDENT :
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$sql .= " AND visible_student = 1 ";
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break;
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case VISIBLE_TEACHER :
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$sql .= " AND visible_teacher = 1 ";
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break;
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}
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$sql .= " ORDER BY date_start DESC LIMIT 0,7";
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$announcements = Database::query($sql,__FILE__,__LINE__);
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if (Database::num_rows($announcements))
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{
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$query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
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$query_string = ereg_replace('&$', '', $query_string);
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$url = api_get_self();
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echo '<div class="system_announcements">';
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echo '<h3>'.get_lang('SystemAnnouncements').'</h3>';
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echo '<table border="0">';
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while ($announcement = Database::fetch_object($announcements))
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{
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if ($id != $announcement->id)
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{
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if (strlen($query_string) > 0)
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{
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$show_url = 'news_list.php#'.$announcement->id;
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//$show_url = $url.'?'.$query_string.'&announcement='.$announcement->id;
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}
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else
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{
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$show_url = 'news_list.php#'.$announcement->id;
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//$show_url = $url.'?announcement='.$announcement->id;
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}
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echo '<tr class="system_announcement">
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<td width="80px" valign="top" class="system_announcement_title">'
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.$announcement->display_date.'
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</td>
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<td valign="top">
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<a name="ann'.$announcement->id.'" href="'.$show_url.'">'.$announcement->title.'</a>
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</td>
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</tr>';
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}
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else
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{
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echo '<div class="system_announcement">
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<div class="system_announcement_title">'
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.$announcement->display_date.'
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<a name="ann'.$announcement->id.'" href="'.$url.'?'.$query_string.'#ann'.$announcement->id.'">'.$announcement->title.'</a>
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</div>
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<div class="system_announcement_content">'
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.$announcement->content.'
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</div>';
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}
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}
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/*echo '<tr><td height="15px"></td></tr>';*/
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echo '<tr><td colspan="2">';
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echo '<a href="news_list.php">'.get_lang("More").'</a>';
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echo '</td></tr>';
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echo '</table>';
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echo '</div>';
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}
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return;
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}
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function display_all_announcements($visible, $id = -1,$start = 0,$user_id='')
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{
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$user_selected_language = api_get_interface_language();
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$sql = "SELECT *, DATE_FORMAT(date_start,'%d-%m-%Y') AS display_date FROM ".$db_table."
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WHERE (lang='$user_selected_language' OR lang IS NULL) AND ((NOW() BETWEEN date_start AND date_end) OR date_end='0000-00-00')";
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switch ($visible)
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{
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case VISIBLE_GUEST :
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$sql .= " AND visible_guest = 1 ";
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break;
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case VISIBLE_STUDENT :
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$sql .= " AND visible_student = 1 ";
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break;
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case VISIBLE_TEACHER :
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$sql .= " AND visible_teacher = 1 ";
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break;
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}
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if(!isset($_GET['start']) || $_GET['start'] == 0) {
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$sql .= " ORDER BY date_start DESC LIMIT ".$start.",20";
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} else {
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$sql .= " ORDER BY date_start DESC LIMIT ".($start+1).",20";
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}
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$announcements = Database::query($sql,__FILE__,__LINE__);
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if (Database::num_rows($announcements)) {
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$query_string = ereg_replace('announcement=[1-9]+', '', $_SERVER['QUERY_STRING']);
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$query_string = ereg_replace('&$', '', $query_string);
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$url = api_get_self();
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echo '<div class="system_announcements">';
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echo '<h3>'.get_lang('SystemAnnouncements').'</h3>';
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echo '<table align="center">';
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echo '<tr>';
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echo '<td>';
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SystemAnnouncementManager :: display_fleche($user_id);
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echo '</td>';
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echo '</tr>';
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echo '</table>';
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echo '<table align="center" border="0" width="900px">';
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while ($announcement = Database::fetch_object($announcements)) {
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echo '<tr><td>';
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echo '<a name="'.$announcement->id.'"></a>
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<div class="system_announcement">
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<div class="system_announcement_title">'
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.$announcement->display_date.' <strong>'.$announcement->title.'</strong>
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</div>
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<br />
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<div class="system_announcement_content">'
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.$announcement->content.'
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</div>
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</div>
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<br />
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<hr noshade size="1">';
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echo '</tr></td>';
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}
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echo '</table>';
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echo '<table align="center">';
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echo '<tr>';
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echo '<td>';
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SystemAnnouncementManager :: display_fleche($user_id);
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echo '</td>';
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echo '</tr>';
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echo '</table>';
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echo '</div>';
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}
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return;
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}
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function display_fleche($user_id)
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{
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$start = (int)$_GET['start'];
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$nb_announcement = SystemAnnouncementManager :: count_nb_announcement($start,$user_id);
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$next = ((int)$_GET['start']+19);
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$prev = ((int)$_GET['start']-19);
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if(!isset($_GET['start']) || $_GET['start'] == 0) {
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if($nb_announcement > 20) {
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echo '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
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}
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} else {
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echo '<a href="news_list.php?start='.$prev.'"> << '.get_lang('Prev').'</a>';
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if($nb_announcement > 20) {
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echo '<a href="news_list.php?start='.$next.'">'.get_lang('NextBis').' >> </a>';
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}
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}
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}
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function count_nb_announcement($start = 0,$user_id = '')
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{
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$start = intval($start);
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$visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
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$user_selected_language = api_get_interface_language();
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$sql = 'SELECT id
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FROM '.$db_table.'
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WHERE (lang="'.$user_selected_language.'" OR lang IS NULL) ';
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if (isset($user_id)) {
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switch ($visibility)
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{
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case VISIBLE_GUEST :
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$sql .= " AND visible_guest = 1 ";
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break;
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case VISIBLE_STUDENT :
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$sql .= " AND visible_student = 1 ";
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break;
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case VISIBLE_TEACHER :
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$sql .= " AND visible_teacher = 1 ";
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break;
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}
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}
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$sql .= 'LIMIT '.$start.',21';
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$announcements = Database::query($sql,__FILE__,__LINE__);
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$i = 0;
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while($rows = Database::fetch_array($announcements))
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{
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$i++;
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}
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return $i;
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}
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/**
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* Get all announcements
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* @return array An array with all available system announcements (as php
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* objects)
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*/
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function get_all_announcements()
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{
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$sql = "SELECT *, IF( NOW() BETWEEN date_start AND date_end, '1', '0') AS visible FROM ".$db_table." ORDER BY date_start ASC";
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$announcements = Database::query($sql,__FILE__,__LINE__);
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$all_announcements = array();
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while ($announcement = Database::fetch_object($announcements))
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{
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$all_announcements[] = $announcement;
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}
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return $all_announcements;
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}
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/**
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* Adds an announcement to the database
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* @param string $title Title of the announcement
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* @param string $content Content of the announcement
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* @param string $date_start Start date (YYYY-MM-DD HH:II: SS)
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* @param string $date_end End date (YYYY-MM-DD HH:II: SS)
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*/
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function add_announcement($title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0, $lang = null, $send_mail=0)
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{
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$a_dateS = explode(' ',$date_start);
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$a_arraySD = explode('-',$a_dateS[0]);
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$a_arraySH = explode(':',$a_dateS[1]);
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$date_start = array_merge($a_arraySD,$a_arraySH);
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$a_dateE = explode(' ',$date_end);
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$a_arrayED = explode('-',$a_dateE[0]);
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$a_arrayEH = explode(':',$a_dateE[1]);
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$date_end = array_merge($a_arrayED,$a_arrayEH);
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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if (!checkdate($date_start[1], $date_start[2], $date_start[0])) {
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Display :: display_normal_message(get_lang('InvalidStartDate'));
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return false;
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}
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if (($date_end[1] || $date_end[2] || $date_end[0]) && !checkdate($date_end[1], $date_end[2], $date_end[0])) {
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Display :: display_normal_message(get_lang('InvalidEndDate'));
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return false;
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}
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if( strlen(trim($title)) == 0) {
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Display::display_normal_message(get_lang('InvalidTitle'));
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return false;
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}
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$start = $date_start[0]."-".$date_start[1]."-".$date_start[2]." ".$date_start[3].":".$date_start[4].":".$date_start[5];
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$end = $date_end[0]."-".$date_end[1]."-".$date_end[2]." ".$date_end[3].":".$date_end[4].":".$date_start[5];
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$title = Database::escape_string($title);
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$content = Database::escape_string($content);
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$lang = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
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$sql = "INSERT INTO ".$db_table." (title,content,date_start,date_end,visible_teacher,visible_student,visible_guest, lang)
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VALUES ('".$title."','".$content."','".$start."','".$end."','".$visible_teacher."','".$visible_student."','".$visible_guest."',".$lang.")";
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if ($send_mail==1) {
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SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student);
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}
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return Database::query($sql,__FILE__,__LINE__);
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}
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/**
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* Updates an announcement to the database
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* @param integer $id : id of the announcement
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* @param string $title : title of the announcement
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* @param string $content : content of the announcement
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* @param array $date_start: start date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
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* @param array $date_end : end date of announcement (0 => day ; 1 => month ; 2 => year ; 3 => hour ; 4 => minute)
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*/
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function update_announcement($id, $title, $content, $date_start, $date_end, $visible_teacher = 0, $visible_student = 0, $visible_guest = 0,$lang=null, $send_mail=0)
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{
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$a_dateS = explode(' ',$date_start);
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$a_arraySD = explode('-',$a_dateS[0]);
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$a_arraySH = explode(':',$a_dateS[1]);
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$date_start = array_merge($a_arraySD,$a_arraySH);
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$a_dateE = explode(' ',$date_end);
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$a_arrayED = explode('-',$a_dateE[0]);
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$a_arrayEH = explode(':',$a_dateE[1]);
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$date_end = array_merge($a_arrayED,$a_arrayEH);
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$lang = is_null($lang) ? 'NULL' : "'".Database::escape_string($lang)."'";
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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if (!checkdate($date_start[1], $date_start[2], $date_start[0])) {
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Display :: display_normal_message(get_lang('InvalidStartDate'));
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return false;
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}
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if (($date_end[1] || $date_end[2] || $date_end[0]) && !checkdate($date_end[1], $date_end[2], $date_end[0])) {
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Display :: display_normal_message(get_lang('InvalidEndDate'));
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return false;
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}
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if( strlen(trim($title)) == 0) {
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Display::display_normal_message(get_lang('InvalidTitle'));
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return false;
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}
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$start = $date_start[0]."-".$date_start[1]."-".$date_start[2]." ".$date_start[3].":".$date_start[4].":".$date_start[5];
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$end = $date_end[0]."-".$date_end[1]."-".$date_end[2]." ".$date_end[3].":".$date_end[4].":".$date_start[5];
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$title = Database::escape_string($title);
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$content = Database::escape_string($content);
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$id = intval($id);
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$sql = "UPDATE ".$db_table." SET lang=$lang,title='".$title."',content='".$content."',date_start='".$start."',date_end='".$end."', ";
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$sql .= " visible_teacher = '".$visible_teacher."', visible_student = '".$visible_student."', visible_guest = '".$visible_guest."' WHERE id='".$id."'";
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if ($send_mail==1) {
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SystemAnnouncementManager::send_system_announcement_by_email($title, $content,$visible_teacher, $visible_student);
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}
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return Database::query($sql,__FILE__,__LINE__);
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}
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/**
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* Deletes an announcement
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* @param integer $id The identifier of the announcement that should be
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* deleted
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*/
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function delete_announcement($id)
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{
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$id = intval($id);
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$sql = "DELETE FROM ".$db_table." WHERE id='".$id."'";
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return Database::query($sql,__FILE__,__LINE__);
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}
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/**
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* Gets an announcement
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* @param integer $id The identifier of the announcement that should be
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* deleted
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*/
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function get_announcement($id)
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{
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$id = intval($id);
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$sql = "SELECT * FROM ".$db_table." WHERE id='".$id."'";
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$announcement = Database::fetch_object(Database::query($sql,__FILE__,__LINE__));
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return $announcement;
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}
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/**
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* Change the visibility of an announcement
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* @param integer $announcement_id
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* @param integer $user For who should the visibility be changed (possible
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* values are VISIBLE_TEACHER, VISIBLE_STUDENT, VISIBLE_GUEST)
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*/
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function set_visibility($announcement_id, $user, $visible)
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{
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$db_table = Database :: get_main_table(TABLE_MAIN_SYSTEM_ANNOUNCEMENTS);
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$announcement_id = intval($announcement_id);
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$field = ($user == VISIBLE_TEACHER ? 'visible_teacher' : ($user == VISIBLE_STUDENT ? 'visible_student' : 'visible_guest'));
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$sql = "UPDATE ".$db_table." SET ".$field." = '".$visible."' WHERE id='".$announcement_id."'";
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return Database::query($sql,__FILE__,__LINE__);
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}
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function send_system_announcement_by_email($title,$content,$teacher, $student)
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{
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global $_user;
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global $_setting;
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global $charset;
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$user_table = Database :: get_main_table(TABLE_MAIN_USER);
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if ($teacher<>0 AND $student == '0') {
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$sql = "SELECT * FROM $user_table WHERE email<>'' AND status = '1'";
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}
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if ($teacher == '0' AND $student <> '0') {
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$sql = "SELECT * FROM $user_table WHERE email<>'' AND status = '5'";
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}
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if ($teacher<>'0' AND $student <> '0') {
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$sql = "SELECT * FROM $user_table WHERE email<>''";
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}
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if ($teacher == '0' AND $student == '0') {
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return true;
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}
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$result = Database::query($sql,__FILE__,__LINE__);
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while($row = Database::fetch_array($result,'ASSOC'))
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{
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api_mail_html(api_get_person_name($row['firstname'], $row['lastname'], null, PERSON_NAME_EMAIL_ADDRESS), $row['email'], api_html_entity_decode(stripslashes($title), ENT_QUOTES, $charset), api_html_entity_decode(stripslashes($content), ENT_QUOTES, $charset), api_get_person_name($_user['firstName'], $_user['lastName'], null, PERSON_NAME_EMAIL_ADDRESS), api_get_setting('emailAdministrator'), api_get_setting('emailAdministrator'));
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}
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}
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}
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?>
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