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<?php
namespace Zotlabs\Module;
use App;
use Zotlabs\Lib\Apps;
use Zotlabs\Lib\Config;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\Enotify;
use Zotlabs\Lib\XConfig;
class Sse extends Controller {
public static $uid;
public static $ob_hash;
public static $sse_id;
public static $vnotify;
public static $sse_enabled;
function init() {
if((observer_prohibited(true))) {
killme();
}
if(! intval(Config::Get('system','open_pubstream',1))) {
if(! get_observer_hash()) {
killme();
}
}
// this is important!
session_write_close();
self::$uid = local_channel();
self::$ob_hash = get_observer_hash();
self::$sse_id = false;
self::$vnotify = -1;
if(! self::$ob_hash) {
if(session_id()) {
self::$sse_id = true;
self::$ob_hash = 'sse_id.' . session_id();
}
else {
return;
}
}
if (self::$uid) {
self::$vnotify = get_pconfig(self::$uid, 'system', 'vnotify');
}
$sleep = 1000000; // microseconds
self::$sse_enabled = Config::Get('system', 'sse_enabled', 0);
if(self::$sse_enabled) {
// Server Sent Events
header("Content-Type: text/event-stream");
header("Cache-Control: no-cache");
header("Connection: keep-alive");
header("X-Accel-Buffering: no");
$i = 0;
while(true) {
// reset counter for updating chatpresence about every minute
if (($i * $sleep)/60 > 1000000) {
$i = 0;
}
if(!self::$sse_id && $i === 0) {
// Update chat presence indication about once per minute
$r = q("select cp_id, cp_room from chatpresence where cp_xchan = '%s' and cp_client = '%s' and cp_room = 0 limit 1",
dbesc(self::$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($_SERVER['REMOTE_ADDR'])
);
}
}
XConfig::Load(self::$ob_hash);
$result = [];
$lock = XConfig::Get(self::$ob_hash, 'sse', 'lock');
if (!$lock) {
$result = XConfig::Get(self::$ob_hash, 'sse', 'notifications', []);
}
// We do not have the local_channel in the addon.
// Reset pubs here if the app is not installed.
if (self::$uid && (!(self::$vnotify & VNOTIFY_PUBS) || !Apps::system_app_installed(self::$uid, 'Public Stream'))) {
if (isset($result['pubs'])) {
unset($result['pubs']);
}
}
if($result) {
echo "event: notifications\n";
echo 'data: ' . json_encode($result);
echo "\n\n";
XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
unset($result);
}
// always send heartbeat to detect disconnected clients
echo "event: heartbeat\n";
echo 'data: {}';
echo "\n\n";
if(ob_get_length() > 0)
ob_end_flush();
flush();
if(connection_status() != CONNECTION_NORMAL || connection_aborted()) {
//TODO: this does not seem to be triggered
XConfig::Set(self::$ob_hash, 'sse', 'timestamp', NULL_DATE);
break;
}
$i++;
usleep($sleep);
}
}
else {
// Fallback to traditional polling
if(! self::$sse_id) {
// Update chat presence indication
$r = q("select cp_id, cp_room from chatpresence where cp_xchan = '%s' and cp_client = '%s' and cp_room = 0 limit 1",
dbesc(self::$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($_SERVER['REMOTE_ADDR'])
);
}
}
XConfig::Load(self::$ob_hash);
$result = XConfig::Get(self::$ob_hash, 'sse', 'notifications', []);
$lock = XConfig::Get(self::$ob_hash, 'sse', 'lock');
if($result && !$lock) {
XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
json_return_and_die($result);
}
killme();
}
}
}
|
