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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 $sse_enabled;
function init() {
// This is important!
session_write_close();
ignore_user_abort(true);
if((observer_prohibited(true))) {
killme();
}
self::$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'])
);
}
}
$result = [];
XConfig::Load(self::$ob_hash);
$lock = XConfig::Get(self::$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($result);
echo "\n\n";
}
else {
// if no result we will send a heartbeat to keep connected
echo "event: heartbeat\n";
echo 'data: {}';
echo "\n\n";
}
if (connection_status() != CONNECTION_NORMAL || connection_aborted()) {
// In case session_write_close() failed for some reason and
// the channel was changed we might need to reset the
// session to it's current stored state here.
// Otherwise the uid might switch back to the previous value
// in the background.
session_reset();
XConfig::Set(self::$ob_hash, 'sse', 'timestamp', NULL_DATE);
XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
if (ob_get_length() > 0) {
ob_end_flush();
}
flush();
exit;
}
if (ob_get_length() > 0) {
ob_flush();
}
flush();
usleep($sleep);
if ($result) {
XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
}
$i++;
}
}
else {
// Fallback to traditional polling
if(!self::$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'])
);
}
}
$result = [];
XConfig::Load(self::$ob_hash);
$lock = XConfig::Get(self::$ob_hash, 'sse', 'lock');
if (!$lock) {
$result = XConfig::Get(self::$ob_hash, 'sse', 'notifications', []);
}
if ($result) {
XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
json_return_and_die($result);
}
killme();
}
}
}
|
