egroupware/notifications/inc/class.notifications_winpopup.inc.php

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<?php
/**
* eGroupWare - Notifications
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package notifications
* @subpackage backends
* @link http://www.egroupware.org
* @author Christian Binder <christian@jaytraxx.de>
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* @version $Id$
*/
/**
* User notification via winpopup.
*/
class notifications_winpopup implements notifications_iface {
/**
* Appname
*/
const _appname = 'notifications';
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/**
* Login table in SQL database
*/
const _login_table = 'egw_access_log';
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/**
* holds account object for user who sends the message
*
* @var object
*/
private $sender;
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/**
* holds account object for user to notify
*
* @var object
*/
private $recipient;
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/**
* holds config object (sitewide application config)
*
* @var object
*/
private $config;
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/**
* holds preferences object of user to notify
*
* @var object
*/
private $preferences;
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/**
* holds the netbios command to be executed on notification
*
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* @abstract
* Example: $netbios_command = "/bin/echo [MESSAGE] | /usr/bin/smbclient -M computer-[4] -I [IP] -U [SENDER]";
*
* Placeholders are:
* [MESSAGE] is the notification message itself
* [1] - [4] are the IP-Octets of the windows machine to notify
* [IP] is the IP-Adress of the windows machine to notify
* [SENDER] is the sender of the message
* Note: the webserver-user needs execute rights for this command
*
* @var string
*/
private $netbios_command = false;
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/**
* constructor of notifications_winpopup
*
* @param object $_sender
* @param object $_recipient
* @param object $_config
* @param object $_preferences
*/
public function __construct($_sender, $_recipient, $_config = null, $_preferences = null) {
if(!is_object($_sender)) { throw new Exception("no sender given."); }
if(!is_object($_recipient)) { throw new Exception("no recipient given."); }
if(!$this->netbios_command) {
throw new Exception( 'Winpopup plugin not configured yet. Skipped sending notification message. '.
'Please check var "netbios_command" in winpopup backend '.
'('.EGW_INCLUDE_ROOT. SEP. self::_appname. SEP. 'inc'. SEP. 'class.notifications_winpopup.inc.php).');
}
$this->sender = $_sender;
$this->recipient = $_recipient;
$this->config = $_config;
$this->preferences = $_preferences;
}
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/**
* sends notification
*
* @param array $_messages
* @param string $_subject
* @param array $_links
* @param array $_attachments
*/
public function send(array $_messages, $_subject = false, $_links = false, $_attachments = false) {
$user_sessions = array();
foreach (egw_session::session_list(0, 'asc', 'session_dla', true) as $session) {
if ($session['session_lid'] == $this->recipient->account_lid. '@'. $GLOBALS['egw_info']['user']['domain']) {
if($this->valid_ip($session['session_ip'])) {
$user_sessions[] = $session['session_ip'];
}
}
}
if ( empty($user_sessions) ) throw new Exception("User #{$this->recipient->account_id} isn't online. Can't send notification via winpopup");
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$this->send_winpopup( $this->render_infos($_subject).$_messages['plain'], $user_sessions );
return true;
}
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/**
* sends the winpopup message via command line string netbios_command specified above
*
* @param string $_message
* @param array $_user_sessions
*/
private function send_winpopup( $_message, array $_user_sessions ) {
foreach($_user_sessions as $user_session) {
$ip_octets=explode(".",$user_session);
// format the ip_octets to 3 digits each
foreach($ip_octets as $id=>$ip_octet) {
if(strlen($ip_octet)==1) { $ip_octets[$id] = '00'.$ip_octet; }
if(strlen($ip_octet)==2) { $ip_octets[$id] = '0'.$ip_octet; }
}
$placeholders = array( '/\[MESSAGE\]/' => escapeshellarg($_message), // prevent code injection
'/\[1\]/' => $ip_octets[0],
'/\[2\]/' => $ip_octets[1],
'/\[3\]/' => $ip_octets[2],
'/\[4\]/' => $ip_octets[3],
'/\[IP\]/' => $user_session,
'/\[SENDER\]/' => $this->sender->account_fullname ? escapeshellarg($this->sender->account_fullname) : escapeshellarg($this->sender->account_email),
);
$command = preg_replace(array_keys($placeholders), $placeholders, $this->netbios_command);
exec($command,$output,$returncode);
if($returncode != 0) {
throw new Exception("Failed sending notification message via winpopup. Error while executing the specified command.");
}
}
}
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/**
* checks for a valid IPv4-address without CIDR notation
*
* @param string $_ip
* @return true or false
*/
private function valid_ip($_ip) {
return eregi('^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$',$_ip);
}
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/**
* renders additional info from subject
*
* @param string $_subject
* @return plain rendered info as complete string
*/
private function render_infos($_subject = false) {
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$newline = "\n";
if(!empty($_subject)) { return $_subject.$newline; }
return false;
}
}