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<?php
namespace Zotlabs\Module;
use App;
use Zotlabs\Lib\Apps;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\Enotify;
class Sse extends Controller {
public static $uid;
public static $ob_hash;
public static $vnotify;
function init() {
// this is important!
session_write_close();
$sys = get_sys_channel();
self::$uid = local_channel();
self::$ob_hash = get_observer_hash();
self::$vnotify = get_pconfig(self::$uid, 'system', 'vnotify');
$sleep_seconds = 3;
header("Content-Type: text/event-stream");
header("Cache-Control: no-cache");
header("Connection: keep-alive");
header("X-Accel-Buffering: no");
while(true) {
/**
* Update chat presence indication (if applicable)
*/
if(self::$ob_hash) {
$r = q("select cp_id, cp_room from chatpresence where cp_xchan = '%s' and cp_client = '%s' and cp_room = 0 limit 1",
dbesc(self::$ob_hash),
dbesc($_SERVER['REMOTE_ADDR'])
);
$basic_presence = false;
if($r) {
$basic_presence = true;
q("update chatpresence set cp_last = '%s' where cp_id = %d",
dbesc(datetime_convert()),
intval($r[0]['cp_id'])
);
}
if(! $basic_presence) {
q("insert into chatpresence ( cp_xchan, cp_last, cp_status, cp_client)
values( '%s', '%s', '%s', '%s' ) ",
dbesc(self::$ob_hash),
dbesc(datetime_convert()),
dbesc('online'),
dbesc($_SERVER['REMOTE_ADDR'])
);
}
}
/**
* Chatpresence continued... if somebody hasn't pinged recently, they've most likely left the page
* and shouldn't count as online anymore. We allow an expection for bots.
*/
q("delete from chatpresence where cp_last < %s - INTERVAL %s and cp_client != 'auto' ",
db_utcnow(),
db_quoteinterval('3 MINUTE')
);
$x = q("SELECT v FROM xconfig WHERE xchan = '%s' AND cat = 'sse' AND k = 'notifications'",
dbesc(self::$ob_hash)
);
if($x) {
$result = unserialize($x[0]['v']);
}
if($result) {
echo "event: notifications\n";
echo 'data: ' . json_encode($result);
echo "\n\n";
set_xconfig(self::$ob_hash, 'sse', 'notifications', '');
set_xconfig(self::$ob_hash, 'sse', 'timestamp', datetime_convert());
unset($result);
}
// always send heartbeat to detect disconnected clients
echo "event: heartbeat\n";
echo 'data: {}';
echo "\n\n";
ob_end_flush();
flush();
if(connection_status() != CONNECTION_NORMAL || connection_aborted()) {
//TODO: this does not seem to be triggered
set_xconfig(self::$ob_hash, 'sse', 'timestamp', NULL_DATE);
break;
}
sleep($sleep_seconds);
}
}
}
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