function __construct()
{
$sa = LG_STANDALONE ? ' (standalone)' : '';
$ip = $_SERVER['REMOTE_ADDR'];
lgDebug("Request started for {$ip}{$sa}: " . join(',', array_keys($_REQUEST)));
// Make singleton available if we need it
self::$instance = $this;
// Check that the local distributed database table exists and has a matching structure
$this->checkTable();
// Delete any objects that have reached their expiry time
$this->expire();
// Instantiate the main global objects
LigminchaGlobalServer::getMaster();
$server = LigminchaGlobalServer::getCurrent();
LigminchaGlobalUser::checkAll();
LigminchaGlobalSSO::makeSessionFromCookie();
// If this is a changes request,
if (array_key_exists(self::$cmd, $_REQUEST)) {
// Commit the data (and re-route if master)
$data = $_REQUEST[self::$cmd];
if ($data) {
print self::recvQueue($data);
} elseif ($server->isMaster) {
print self::encodeData($this->initialTableData());
}
// If we're the master, always send queue incase any re-routing
if ($server->isMaster) {
self::sendQueue();
}
exit;
} elseif ($server->isMaster && array_key_exists('fakeinfo', $_REQUEST)) {
$actions = array('edited', 'created', 'booked', 'posted');
$titles = array('Alguma Coisa', 'Outra Coisa', 'Muitas Coisas', 'Mais ou Menos');
$users = LigminchaGlobalUser::select();
$user = $users[rand(0, count($users) - 1)]->data['realname'];
$action = $actions[rand(0, count($actions) - 1)];
$title = $titles[rand(0, count($titles) - 1)];
new LigminchaGlobalLog("{$user} {$action} {$title}", 'Info', time() + 1000);
self::sendToWebSocket(array(0, $server->id, 0, LigminchaGlobalSync::select()[0]), 0);
self::sendQueue();
exit;
}
}
/**
* Get/create current session instance
*/
public static function getCurrent()
{
$update = false;
if (is_null(self::$current)) {
// If there's a current user, get/make a current session
if (LigminchaGlobalUser::getCurrent()) {
// None found, create new
// - there will already be a current session established if one existed thanks to SSO::makeSessionFromCookie
self::$current = new LigminchaGlobalSession();
// Doesn't exist, make the data structure for our new server object
self::$current->ref1 = LigminchaGlobalServer::getCurrent()->id;
self::$current->tag = self::getBrowser();
// Session only lives for five seconds in this initial form and doesn't route
self::$current->expire = self::timestamp() + 2;
self::$current->flag(LG_LOCAL, true);
self::$current->flag(LG_PRIVATE, true);
// Save our new instance to the DB
$update = true;
// And save the ID in the SSO cookie
LigminchaGlobalSSO::setCookie(self::$current->id);
lgDebug('New session created and SSO cookie set', self::$current);
} else {
self::$current = false;
}
}
// Update the expiry if the session existed (but only if it's increasing by more than a minute to avoid sync traffic)
if (self::$current && !self::$current->flag(LG_NEW)) {
$expiry = self::timestamp() + LG_SESSION_DURATION;
if ($expiry - self::$current->expire > 60) {
self::$current->expire = $expiry;
$update = true;
}
}
// Avoid multiple calls to update above
if ($update) {
self::$current->update();
}
return self::$current;
}
/**
* Make a current session and current user from an SSO session ID cookie (called when running on a master standalone site)
*/
public static function makeSessionFromCookie()
{
if (array_key_exists(self::$cookie, $_COOKIE)) {
if ($session = LigminchaGlobalSession::selectOne(array('id' => $_COOKIE[self::$cookie]))) {
if ($user = LigminchaGlobalUser::newFromId($session->owner)) {
LigminchaGlobalSession::setCurrent($session);
LigminchaGlobalUser::setCurrent($user);
lgDebug('Session established from existing SSO cookie', $session);
} else {
lgDebug('SSO session cookie found, but user is no longer logged in (' . substr($_COOKIE[self::$cookie], 0, 5) . ')');
}
} else {
lgDebug('SSO session cookie found, but not in database (' . substr($_COOKIE[self::$cookie], 0, 5) . ')');
}
if (!$session || !$user) {
if ($session) {
LigminchaGlobalDistributed::del(array('id' => $session->id));
}
self::delCookie();
}
} else {
lgDebug('No SSO session cookie found ' . var_export($_COOKIE, true));
}
}
/**
* This is used from standalone context to set the session from the SSO cookie
*/
public static function setCurrent($user)
{
self::$current = $user;
}
/**
* Update or create an object in the database and queue the changes if necessary
* - $origin is passed if this changed arrived from a remote queue
* - $silent is used to stop any sync objects being generated by the change
*/
public function update($origin = false, $silent = false)
{
$db = JFactory::getDbo();
$table = LigminchaGlobalDistributed::sqlTable();
// Bail if no type
if ($this->type < 1) {
die('Typeless distributed objects not allowed!');
}
// Update an existing object in the database
if ($this->exists) {
// TODO: Validate cond
// Update automatic properties
$this->flag(LG_NEW, false);
$this->modified = self::timestamp();
$sqlVals = $this->sqlValues(false);
lgDebug('Updating database, object: ' . $this->id);
$db->setQuery("UPDATE {$table} SET {$sqlVals} WHERE `id`=0x{$this->id}");
$db->query();
} else {
// Only set the automatic properties for locally created non-existent objects
if (!$origin) {
$this->flag(LG_NEW, true);
$this->modified = null;
$this->creation = self::timestamp();
// The entry is owned by the user unless it's a server/sync/user object
if ($this->type == LG_SERVER || $this->type == LG_USER || $this->type == LG_SYNC) {
$this->owner = null;
} else {
$this->owner = LigminchaGlobalUser::getCurrent() ? LigminchaGlobalUser::getCurrent()->id : null;
}
}
$sqlVals = $this->sqlValues();
$db->setQuery("REPLACE INTO {$table} SET {$sqlVals}");
$db->query();
}
// Add outgoing sync objects depending on the context of this change
// TODO: $private = $this->flag( LG_PRIVATE ) ? $this->owner->server : false
if (!$silent && !$this->flag(LG_LOCAL)) {
LigminchaGlobalSync::create('U', $this->fields(), $origin, $private = false);
}
}
