picloud ping and fix big bugs

utils/cloud_dispatcher/cloudserver.cpp

@@ -7,6 +7,8 @@ CloudServer::CloudServer(DispatcherClient * c, const PIByteArray & sname) : serv
 		DispatcherClient * cl = index_clients.value(id, nullptr);
 		if (cl) cl->sendData(ba);
 	}));
+	CONNECTL(c, pingReceived, [this]() {last_ping.reset();});
+	last_ping.reset();
 }
 
 
@@ -23,6 +25,7 @@ PIByteArray CloudServer::serverUUID() const {
 
 
 void CloudServer::addClient(DispatcherClient * c) {
+	last_ping.reset();
 	clients << c;
 	index_clients.insert(c->clientId(), c);
 	c->sendConnected(1);
@@ -37,6 +40,7 @@ void CloudServer::addClient(DispatcherClient * c) {
 
 
 void CloudServer::removeClient(DispatcherClient * c) {
+	last_ping.reset();
 	clients.removeOne(c);
 	index_clients.removeOne(c->clientId());
 	server->sendDisconnected(c->clientId());
@@ -48,6 +52,11 @@ PIVector<DispatcherClient *> CloudServer::getClients() {
 }
 
 
+double CloudServer::lastPing() {
+	return last_ping.elapsed_s();
+}
+
+
 void CloudServer::printStatus() {
 	piCout << "    " << "Clients for" << server->address() << server_uuid.toHex() << ":";
 	for (auto c: clients) {