/**
* Create outgoing sync objects(s) from local changes or for re-routing
*
* Make one or more sync objects depending on the context of this change
* - The sync re-routing logic is in here
* - $origin is the server the change came from if set
* - $private is the owner's server if set
*/
public static function create($crud, $fields, $origin, $private = false)
{
$server = LigminchaGlobalServer::getCurrent();
// Origin is set if this change is the result of a received foreign sync object
if ($origin) {
// This is the only condition for which re-routing ever occurs
if ($server->isMaster && $private === false) {
// Create targetted sync objects for all except self and origin
foreach (LigminchaGlobalServer::select() as $s) {
if ($s->id != $server->id && $s->id != $origin) {
new LigminchaGlobalSync($crud, $fields, $s);
}
}
}
} else {
// If this is the master, then targets depend whether its private or not
if ($server->isMaster) {
// If private then we just have a single targetted sync object to the owner
if ($private) {
new LigminchaGlobalSync($crud, $fields, $private);
} else {
foreach (LigminchaGlobalServer::select() as $s) {
if ($s->id != $server->id) {
new LigminchaGlobalSync($crud, $fields, $s);
}
}
}
} else {
new LigminchaGlobalSync($crud, $fields, LigminchaGlobalServer::getMaster());
}
}
}
function __construct($message = false, $tag = '', $expire = false)
{
// This goes first so that parent constructor will raise an error if the current uuid type doesn't match
$this->type = LG_LOG;
// Give the new object an ID
parent::__construct();
if ($message) {
// Set the cmd and data
$this->ref1 = LigminchaGlobalServer::getCurrent()->id;
$this->tag = $tag;
$this->data = $message;
$this->expire = $expire;
// Store the new log entry in the database
$this->update();
}
}
/**
* Check if the passed Joomla user exists as a global user, create if not
*/
public static function checkUser($jUser)
{
// Make a new uuid from the server ID and the user's Joomla ID
$server = LigminchaGlobalServer::getCurrent();
$id = self::hash($server->id . ':' . $jUser->id);
$user = self::newFromId($id);
// Try and load the object data now that we know its uuid
if (!$user->load()) {
// Doesn't exist, make the data structure for our new user object from $jUser
$user->ref1 = $server->id;
$user->tag = $jUser->id;
$user->data = array('realname' => $jUser->name, 'username' => $jUser->username, 'email' => $jUser->email);
// Save our new instance to the DB
$user->update();
}
return $user;
}
/**
* 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;
}
/**
* Render an iFrame that requests the global toolbar
*/
public static function toolbar()
{
// Get the url of the global app
$config = JFactory::getConfig();
$lgGlobalAppDomain = $config->get('lgGlobalApp', 'global.ligmincha.org');
// Include the code to render the toolbar
require __DIR__ . '/toolbar.php';
// Add the toolbar to the body if we have a user
$app = JFactory::getApplication('site');
$page = $app->getBody();
// Add the toolbar head code into the page head area
$page = str_replace('</head>', "{$lgToolbarHead}\n</head>", $page);
// Add the toolbar body code into start of the page body
$page = preg_replace('#<body.*?>#', "\$0\n{$lgToolbarBody}", $page);
// Set the image to the currently selected header (tempprary: fake template updating demo)
$data = LigminchaGlobalServer::getCurrent()->data;
$template = array_key_exists('template', $data) ? $data['template'] : 'maple';
$page = preg_replace('#(?<=src="images/headers/)(.+?)(?=\\.jpg")#', $template, $page);
lgDebug("Template set to \"{$template}\"");
// Update the page content
$app->setBody($page);
lgDebug("Global toolbar added to Joomla page");
}
/**
* Receive sync-object queue from a remote server
*/
private static function recvQueue($data)
{
// Decode the data
$queue = $orig = self::decodeData($data);
if (!is_array($queue)) {
die(lgDebug("Problem with received sync data: {$data}"));
}
$ip = array_shift($queue);
$origin = array_shift($queue);
$session = array_shift($queue);
// If we're the master, forward this queue to the WebSocket if it's active
if (LigminchaGlobalServer::getCurrent()->isMaster) {
self::sendToWebSocket($orig, $session);
}
// Process each of the sync objects (this may lead to further re-routing sync objects being made)
foreach ($queue as $sync) {
LigminchaGlobalSync::process($sync['tag'], $sync['data'], $origin);
}
// Let client know that we've processed their sync data
lgDebug('Sync data processed, returning "ok"');
return 'ok';
}
