egroupware/notifications/inc/class.notifications_push.inc.php

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<?php
/**
* Notifications: push via notification polling
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage ajax
* @author Ralf Becker <rb@stylite.de>
* @version $Id$
*/
use EGroupware\Api;
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use EGroupware\Api\Json;
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/**
* Class to push via notification polling and other json requests from client-side
*/
class notifications_push implements Json\PushBackend
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{
const APP = 'notifications';
/**
* Notification table in SQL database
*/
const TABLE = 'egw_notificationpopup';
/**
* Notification type
*/
const TYPE = 'push';
/**
* Reference to global DB object
*
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* @var Api\Db
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*/
public static $db;
public static function get()
{
$already_send =& Api\Cache::getSession(__CLASS__, 'already_send');
$max_id = Api\Cache::getInstance(__CLASS__, 'max_id');
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if (!isset($already_send))
{
self::cleanup_push_msgs();
if (!isset($max_id))
{
$max_id = (int)self::$db->select(self::TABLE, 'MAX(notify_id)', false, __LINE__, __FILE__, false, '', self::APP)->fetchColumn();
Api\Cache::setInstance(__CLASS__, 'max_id', $max_id);
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}
$already_send = $max_id;
}
elseif (isset($max_id) && $max_id > $already_send)
{
$response = Json\Response::get();
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foreach(self::$db->select(self::TABLE, '*', array(
'account_id' => array(0, $GLOBALS['egw_info']['user']['account_id']),
'notify_type' => self::TYPE,
'notify_id > '.(int)$already_send,
), __LINE__, __FILE__, false, 'ORDER BY notify_id ASC', self::APP) as $row)
{
$message = json_decode($row['notify_message'], true);
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//error_log(__METHOD__."() already_send=$already_send, message=".array2string($message));
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if (is_array($message) && method_exists($response, $message['method']))
{
call_user_func_array(array($response, $message['method']), (array)$message['data']);
}
$already_send = $row['notify_id'];
}
}
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//error_log(__METHOD__."() max_id=$max_id, already_sent=$already_send");
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}
/**
* Adds any type of data to the message
*
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* @param int|null $account_id account_id to push message too, 0 for broadcast
* or null for curent session (we can only send to current user)
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* @param string $key
* @param mixed $data
*
* This function doesn't throw exception regarding if user availability anymore,
* if you need to check if user is online or not please use this function
* Api\Session::notifications_active($account_id) in a clause.
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*/
public function addGeneric($account_id, $key, $data)
{
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if (!isset($account_id)) $account_id = $GLOBALS['egw_info']['user']['account_id'];
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self::$db->insert(self::TABLE, array(
'account_id' => $account_id,
'notify_type' => self::TYPE,
'notify_message' => json_encode(array(
'method' => $key,
'data' => $data,
)),
), false, __LINE__, __FILE__, self::APP);
// cache highest id, to not poll database
Api\Cache::setInstance(__CLASS__, 'max_id', self::$db->get_last_insert_id(self::TABLE, 'notify_id'));
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self::cleanup_push_msgs();
}
/**
* Delete push messges older then our heartbeat-limit (poll frequency of notifications)
*/
protected static function cleanup_push_msgs()
{
if (($ts = self::$db->from_unixtime(Api\Session::heartbeat_limit())))
{
self::$db->delete(self::TABLE, array(
'notify_type' => self::TYPE,
'notify_created < '.$ts,
), __LINE__, __FILE__, self::APP);
}
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}
/**
* Init our static variables eg. database object
*/
public static function init_static()
{
self::$db =& $GLOBALS['egw']->db;
}
}
notifications_push::init_static();