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