From 90f18ea651f8ffcfdf9ae5d43bbc537418326b17 Mon Sep 17 00:00:00 2001
From: milek7 <me@milek7.pl>
Date: Sun, 27 Jan 2019 20:38:03 +0100
Subject: [PATCH] work

---
 CMakeLists.txt           |  1 -
 Globals.cpp              |  6 ----
 application.cpp          | 15 ++++-----
 application.h            |  5 ++-
 command.cpp              |  1 +
 command.h                |  1 +
 network/backend/asio.cpp | 54 +++++++++++++++++++-------------
 network/backend/asio.h   |  9 +++---
 network/backend/file.cpp |  0
 network/backend/file.h   | 22 --------------
 network/manager.cpp      | 24 ++++++++++++++-
 network/manager.h        |  4 +++
 network/message.cpp      |  2 ++
 network/message.h        |  1 +
 network/network.cpp      | 66 +++++++++++++++++++++++++++++++++++-----
 network/network.h        | 22 ++++++++++++--
 simulation.cpp           |  7 +++++
 17 files changed, 168 insertions(+), 72 deletions(-)
 delete mode 100644 network/backend/file.cpp
 delete mode 100644 network/backend/file.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76882d8c..15cb97ce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -119,7 +119,6 @@ set(SOURCES
 "network/message.cpp"
 "network/manager.cpp"
 "network/backend/asio.cpp"
-"network/backend/file.cpp"
 
 "widgets/vehiclelist.cpp"
 
diff --git a/Globals.cpp b/Globals.cpp
index ae58e209..7fd722e3 100644
--- a/Globals.cpp
+++ b/Globals.cpp
@@ -813,12 +813,6 @@ global_settings::ConfigParse(cParser &Parser) {
         bEnableTraction = false; // false = pantograf się nie połamie
         bLiveTraction = false; // false = pantografy zawsze zbierają 95% MaxVoltage
     }
-    if (iMultiplayer > 0)
-    {
-        bInactivePause = false; // okno "w tle" nie może pauzować, jeśli włączona komunikacja
-        // pauzowanie jest zablokowane dla (iMultiplayer&2)>0, więc iMultiplayer=1 da się zapauzować
-        // (tryb instruktora)
-    }
 /*
     fFpsMin = fFpsAverage -
               fFpsDeviation; // dolna granica FPS, przy której promień scenerii będzie zmniejszany
diff --git a/application.cpp b/application.cpp
index 1daa0b58..4cbc1fe4 100644
--- a/application.cpp
+++ b/application.cpp
@@ -57,12 +57,7 @@ extern WNDPROC BaseWindowProc;
 // user input callbacks
 
 void focus_callback( GLFWwindow *window, int focus ) {
-    if( Global.bInactivePause ) {// jeśli ma być pauzowanie okna w tle
-        if( focus )
-            Global.iPause &= ~4; // odpauzowanie, gdy jest na pierwszym planie
-        else
-            Global.iPause |= 4; // włączenie pauzy, gdy nieaktywy
-    }
+	Application.on_focus_change(focus != 0);
 }
 
 void window_resize_callback( GLFWwindow *window, int w, int h ) {
@@ -329,7 +324,6 @@ eu07_application::render_ui() {
 
 bool
 eu07_application::pop_mode() {
-
     if( m_modestack.empty() ) { return false; }
 
     m_modes[ m_modestack.top() ]->exit();
@@ -434,6 +428,13 @@ void eu07_application::on_char(unsigned int c) {
         return;
 }
 
+void eu07_application::on_focus_change(bool focus) {
+	if( Global.bInactivePause && !m_network->client) {// jeśli ma być pauzowanie okna w tle
+		command_relay relay;
+		relay.post(user_command::focuspauseset, focus ? 1.0 : 0.0, 0.0, GLFW_PRESS, 0);
+	}
+}
+
 GLFWwindow *
 eu07_application::window( int const Windowindex ) {
 
diff --git a/application.h b/application.h
index 2da6655a..e3f43507 100644
--- a/application.h
+++ b/application.h
@@ -71,7 +71,10 @@ public:
         on_mouse_button( int const Button, int const Action, int const Mods );
     void
         on_scroll( double const Xoffset, double const Yoffset );
-    void on_char(unsigned int c);
+	void
+	    on_char(unsigned int c);
+	void
+	    on_focus_change(bool focus);
     // gives access to specified window, creates a new window if index == -1
     GLFWwindow *
         window( int const Windowindex = 0 );
diff --git a/command.cpp b/command.cpp
index 1d9e9802..a24dcd49 100644
--- a/command.cpp
+++ b/command.cpp
@@ -227,6 +227,7 @@ commanddescription_sequence Commands_descriptions = {
     { "vehiclemovebackwards", command_target::vehicle, command_mode::oneoff },
     { "vehicleboost", command_target::vehicle, command_mode::oneoff },
     { "debugtoggle", command_target::simulation, command_mode::oneoff },
+    { "focuspauseset", command_target::simulation, command_mode::oneoff },
     { "pausetoggle", command_target::simulation, command_mode::oneoff },
     { "entervehicle", command_target::simulation, command_mode::oneoff },
     { "queueevent", command_target::simulation, command_mode::oneoff },
diff --git a/command.h b/command.h
index b20f0d26..37e03f09 100644
--- a/command.h
+++ b/command.h
@@ -221,6 +221,7 @@ enum class user_command {
 	vehiclemovebackwards,
 	vehicleboost,
 	debugtoggle,
+	focuspauseset,
 	pausetoggle,
 	entervehicle,
 	queueevent,
diff --git a/network/backend/asio.cpp b/network/backend/asio.cpp
index 5f46f52c..4a7bb5be 100644
--- a/network/backend/asio.cpp
+++ b/network/backend/asio.cpp
@@ -2,8 +2,8 @@
 #include "sn_utils.h"
 #include "Logs.h"
 
-network::tcp::connection::connection(asio::io_context &io_ctx, bool client)
-    : network::connection(client), m_socket(io_ctx)
+network::tcp::connection::connection(asio::io_context &io_ctx, bool client, size_t counter)
+    : network::connection(client, counter), m_socket(io_ctx)
 {
 	m_header_buffer.resize(8);
 }
@@ -16,9 +16,7 @@ void network::tcp::connection::disconnect()
 
 void network::tcp::connection::send_data(std::shared_ptr<std::string> buffer)
 {
-	asio::async_write(m_socket, asio::buffer(*buffer.get()), std::bind(&connection::handle_send, this, buffer,
-	                                                            std::placeholders::_1,
-	                                                            std::placeholders::_2));
+	asio::async_write(m_socket, asio::buffer(*buffer.get()), std::bind(&connection::send_complete, this, buffer));
 }
 
 void network::tcp::connection::connected()
@@ -34,12 +32,6 @@ void network::tcp::connection::read_header()
 	                              std::placeholders::_1, std::placeholders::_2));
 }
 
-void network::tcp::connection::handle_send(
-        std::shared_ptr<std::string> buf, const asio::error_code &err, size_t bytes_transferred)
-{
-
-}
-
 void network::tcp::connection::handle_header(const asio::error_code &err, size_t bytes_transferred)
 {
 	std::istringstream header(m_header_buffer);
@@ -80,32 +72,52 @@ void network::tcp::connection::handle_data(const asio::error_code &err, size_t b
 	read_header();
 }
 
-void network::tcp::connection::send_message(const message &msg)
+void network::tcp::connection::write_message(const message &msg, std::ostream &stream)
 {
-	std::ostringstream stream;
+	size_t beg = (size_t)stream.tellp();
+
 	sn_utils::ls_uint32(stream, NETWORK_MAGIC);
 	sn_utils::ls_uint32(stream, 0);
 
 	serialize_message(msg, stream);
 
-	size_t size = (size_t)stream.tellp() - 8;
+	size_t size = (size_t)stream.tellp() - beg - 8;
 	if (size > MAX_MSG_SIZE) {
 		ErrorLog("net: message too big", logtype::net);
 		return;
 	}
-	stream.seekp(4, std::ios_base::beg);
+	stream.seekp(beg + 4, std::ios_base::beg);
 	sn_utils::ls_uint32(stream, size);
 
-	stream.flush();
+	stream.seekp(0, std::ios_base::end);
+}
 
-	std::shared_ptr<std::string> buf = std::make_shared<std::string>(stream.str());
-	send_data(buf);
+void network::tcp::connection::send_messages(const std::vector<std::shared_ptr<message> > &messages)
+{
+	if (messages.size() == 0)
+		return;
+
+	std::ostringstream stream;
+	for (auto const &msg : messages)
+		write_message(*msg.get(), stream);
+
+	stream.flush();
+	send_data(std::make_shared<std::string>(stream.str()));
+}
+
+void network::tcp::connection::send_message(const message &msg)
+{
+	std::ostringstream stream;
+	write_message(msg, stream);
+
+	stream.flush();
+	send_data(std::make_shared<std::string>(stream.str()));
 }
 
 // -----------------
 
-network::tcp::server::server(asio::io_context &io_ctx, const std::string &host, uint32_t port)
-    : m_acceptor(io_ctx)
+network::tcp::server::server(std::shared_ptr<std::istream> buf, asio::io_context &io_ctx, const std::string &host, uint32_t port)
+    : network::server(buf), m_acceptor(io_ctx)
 {
 	auto endpoint = asio::ip::tcp::endpoint(asio::ip::address::from_string(host), port);
 	m_acceptor.open(endpoint.protocol());
@@ -144,7 +156,7 @@ void network::tcp::server::handle_accept(std::shared_ptr<connection> conn, const
 
 network::tcp::client::client(asio::io_context &io_ctx, const std::string &host, uint32_t port)
 {
-	std::shared_ptr<connection> conn = std::make_shared<connection>(io_ctx, true);
+	std::shared_ptr<connection> conn = std::make_shared<connection>(io_ctx, true, messages_counter);
 	conn->set_handler(std::bind(&client::handle_message, this, std::ref(*conn.get()), std::placeholders::_1));
 
 	asio::ip::tcp::endpoint endpoint(
diff --git a/network/backend/asio.h b/network/backend/asio.h
index bbe0858e..a505da03 100644
--- a/network/backend/asio.h
+++ b/network/backend/asio.h
@@ -12,11 +12,11 @@ namespace network::tcp
 		friend class client;
 
 	public:
-		connection(asio::io_context &io_ctx, bool client = false);
+		connection(asio::io_context &io_ctx, bool client = false, size_t counter = 0);
 
 		virtual void connected() override;
 		virtual void disconnect() override;
-		virtual void send_data(std::shared_ptr<std::string> buffer) override;
+		virtual void send_messages(const std::vector<std::shared_ptr<message> > &messages) override;
 		virtual void send_message(const message &msg) override;
 
 		asio::ip::tcp::socket m_socket;
@@ -25,8 +25,9 @@ namespace network::tcp
 		std::string m_header_buffer;
 		std::string m_body_buffer;
 
+		void write_message(const message &msg, std::ostream &stream);
+		void send_data(std::shared_ptr<std::string> buffer);
 		void read_header();
-		void handle_send(std::shared_ptr<std::string> buf, const asio::error_code &err, size_t bytes_transferred);
 		void handle_header(const asio::error_code &err, size_t bytes_transferred);
 		void handle_data(const asio::error_code &err, size_t bytes_transferred);
 	};
@@ -40,7 +41,7 @@ namespace network::tcp
 		asio::ip::tcp::acceptor m_acceptor;
 
 	public:
-		server(asio::io_context &io_ctx, const std::string &host, uint32_t port);
+		server(std::shared_ptr<std::istream> buf, asio::io_context &io_ctx, const std::string &host, uint32_t port);
 	};
 
 	class client : public network::client
diff --git a/network/backend/file.cpp b/network/backend/file.cpp
deleted file mode 100644
index e69de29b..00000000
diff --git a/network/backend/file.h b/network/backend/file.h
deleted file mode 100644
index 3737c53f..00000000
--- a/network/backend/file.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#include "network/network.h"
-
-namespace network::file
-{
-    class server : public network::server
-	{
-	private:
-		std::fstream stream;
-
-	public:
-		server();
-	};
-
-	class client : public network::client
-	{
-	private:
-		std::fstream stream;
-
-	public:
-		client();
-	};
-}
diff --git a/network/manager.cpp b/network/manager.cpp
index 9d727374..4b311c4f 100644
--- a/network/manager.cpp
+++ b/network/manager.cpp
@@ -2,6 +2,11 @@
 #include "simulation.h"
 #include "network/backend/asio.h"
 
+network::server_manager::server_manager()
+{
+	backbuffer = std::make_shared<std::fstream>("backbuffer.bin", std::ios::out | std::ios::in | std::ios::trunc | std::ios::binary);
+}
+
 command_queue::commands_map network::server_manager::pop_commands()
 {
 	command_queue::commands_map map;
@@ -14,13 +19,29 @@ command_queue::commands_map network::server_manager::pop_commands()
 
 void network::server_manager::push_delta(double dt, double sync, const command_queue::commands_map &commands)
 {
+	if (dt == 0.0 && commands.empty())
+		return;
+
 	for (auto srv : servers)
 		srv->push_delta(dt, sync, commands);
+
+	frame_info msg;
+	msg.dt = dt;
+	msg.sync = sync;
+	msg.commands = commands;
+
+	serialize_message(msg, *backbuffer.get());
+}
+
+void network::server_manager::update()
+{
+	for (auto srv : servers)
+		srv->update();
 }
 
 void network::server_manager::create_server(asio::io_context &ctx, const std::string &host, uint32_t port)
 {
-	servers.emplace_back(std::make_shared<tcp::server>(ctx, host, port));
+	servers.emplace_back(std::make_shared<tcp::server>(backbuffer, ctx, host, port));
 }
 
 network::manager::manager()
@@ -30,6 +51,7 @@ network::manager::manager()
 void network::manager::poll()
 {
 	io_context.poll();
+	servers->update();
 }
 
 void network::manager::create_server(const std::string &host, uint32_t port)
diff --git a/network/manager.h b/network/manager.h
index da6ed8ab..09feeb24 100644
--- a/network/manager.h
+++ b/network/manager.h
@@ -10,11 +10,15 @@ namespace network
 	{
 	private:
 		std::vector<std::shared_ptr<server>> servers;
+		std::shared_ptr<std::fstream> backbuffer;
 
 	public:
+		server_manager();
+
 		void push_delta(double dt, double sync, const command_queue::commands_map &commands);
 		command_queue::commands_map pop_commands();
 		void create_server(asio::io_context &ctx, const std::string &host, uint32_t port);
+		void update();
 	};
 
     class manager
diff --git a/network/message.cpp b/network/message.cpp
index 972ae603..7e275733 100644
--- a/network/message.cpp
+++ b/network/message.cpp
@@ -4,11 +4,13 @@
 void network::client_hello::serialize(std::ostream &stream) const
 {
 	sn_utils::ls_int32(stream, version);
+	sn_utils::ls_uint32(stream, start_packet);
 }
 
 void network::client_hello::deserialize(std::istream &stream)
 {
 	version = sn_utils::ld_int32(stream);
+	start_packet = sn_utils::ld_uint32(stream);
 }
 
 void network::server_hello::serialize(std::ostream &stream) const
diff --git a/network/message.h b/network/message.h
index 95991166..9b08c8d7 100644
--- a/network/message.h
+++ b/network/message.h
@@ -31,6 +31,7 @@ struct client_hello : public message
 	virtual void deserialize(std::istream &stream) override;
 
 	int32_t version;
+	uint32_t start_packet;
 };
 
 struct server_hello : public message
diff --git a/network/network.cpp b/network/network.cpp
index 7b98f9fd..aedd00f2 100644
--- a/network/network.cpp
+++ b/network/network.cpp
@@ -16,7 +16,8 @@ void network::connection::set_handler(std::function<void (const message &)> hand
 	message_handler = handler;
 }
 
-network::connection::connection(bool client) {
+network::connection::connection(bool client, size_t counter) {
+	packet_counter = counter;
 	is_client = client;
 	state = AWAITING_HELLO;
 }
@@ -28,10 +29,47 @@ void network::connection::connected()
 	if (is_client) {
 		client_hello msg;
 		msg.version = 1;
+		msg.start_packet = packet_counter;
 		send_message(msg);
 	}
 }
 
+void network::connection::catch_up()
+{
+	backbuffer->seekg(backbuffer_pos);
+
+	std::vector<std::shared_ptr<message>> messages;
+
+	for (size_t i = 0; i < CATCHUP_PACKETS; i++) {
+		if (backbuffer->peek() == EOF) {
+			send_messages(messages);
+			backbuffer->seekg(0, std::ios_base::end);
+			state = ACTIVE;
+			return;
+		}
+
+		if (packet_counter) {
+			packet_counter--;
+			continue;
+		}
+
+		messages.push_back(deserialize_message(*backbuffer.get()));
+	}
+
+	send_messages(messages);
+
+	backbuffer_pos = backbuffer->tellg();
+
+	backbuffer->seekg(0, std::ios_base::end);
+}
+
+void network::connection::send_complete(std::shared_ptr<std::string> buf)
+{
+	if (!is_client && state == CATCHING_UP) {
+		catch_up();
+	}
+}
+
     /*
 	if (msg->type == message::TYPE_MAX)
 	{
@@ -113,11 +151,13 @@ command_queue::commands_map network::connection::pop_commands()
 
 // server
 
+network::server::server(std::shared_ptr<std::istream> buf) : backbuffer(buf)
+{
+
+}
+
 void network::server::push_delta(double dt, double sync, const command_queue::commands_map &commands)
 {
-	if (dt == 0.0 && commands.empty())
-		return;
-
 	frame_info msg;
 	msg.dt = dt;
 	msg.sync = sync;
@@ -128,6 +168,11 @@ void network::server::push_delta(double dt, double sync, const command_queue::co
 			c->send_message(msg);
 }
 
+void network::server::update()
+{
+
+}
+
 command_queue::commands_map network::server::pop_commands()
 {
 	command_queue::commands_map map(client_commands_queue);
@@ -144,9 +189,14 @@ void network::server::handle_message(connection &conn, const message &msg)
 	}
 
 	if (msg.type == message::CLIENT_HELLO) {
+		auto cmd = dynamic_cast<const client_hello&>(msg);
+
 		server_hello reply;
 		reply.seed = Global.random_seed;
-		conn.state = connection::ACTIVE;
+		conn.state = connection::CATCHING_UP;
+		conn.backbuffer = backbuffer;
+		conn.backbuffer_pos = 0;
+		conn.packet_counter = cmd.start_packet;
 
 		conn.send_message(reply);
 
@@ -190,16 +240,18 @@ void network::client::send_commands(command_queue::commands_map commands)
 
 void network::client::handle_message(connection &conn, const message &msg)
 {
-	if (msg.type == message::TYPE_MAX)
+	if (msg.type >= message::TYPE_MAX)
 	{
 		conn.disconnect();
 		return;
 	}
 
+	messages_counter++;
+
 	if (msg.type == message::SERVER_HELLO) {
 		auto cmd = dynamic_cast<const server_hello&>(msg);
-
 		conn.state = connection::ACTIVE;
+
 		Global.random_seed = cmd.seed;
 		Global.random_engine.seed(Global.random_seed);
 
diff --git a/network/network.h b/network/network.h
index 9bcdb1f4..0e766b0f 100644
--- a/network/network.h
+++ b/network/network.h
@@ -9,9 +9,15 @@
 
 namespace network
 {
+    //m7todo: separate client/server connection class?
     class connection
 	{
+		friend class server;
+		friend class client;
+
 	private:
+		const size_t CATCHUP_PACKETS = 100;
+
 		/*
 		std::queue<
 		    std::pair<std::chrono::high_resolution_clock::time_point,
@@ -26,18 +32,24 @@ namespace network
 		bool is_client;
 
 	protected:
+		std::shared_ptr<std::istream> backbuffer;
+		size_t backbuffer_pos;
+		size_t packet_counter;
+
+		void send_complete(std::shared_ptr<std::string> buf);
+		void catch_up();
 
 	public:
 		std::function<void(const message &msg)> message_handler;
 
 		virtual void connected() = 0;
 		virtual void send_message(const message &msg) = 0;
+		virtual void send_messages(const std::vector<std::shared_ptr<message>> &messages) = 0;
 
-		connection(bool client = false);
+		connection(bool client = false, size_t counter = 0);
 		void set_handler(std::function<void(const message &msg)> handler);
 
 		virtual void disconnect() = 0;
-		virtual void send_data(std::shared_ptr<std::string> buffer) = 0;
 
 		enum peer_state {
 			AWAITING_HELLO,
@@ -50,6 +62,9 @@ namespace network
 
 	class server
 	{
+	private:
+		std::shared_ptr<std::istream> backbuffer;
+
 	protected:
 		void handle_message(connection &conn, const message &msg);
 
@@ -58,8 +73,10 @@ namespace network
 		command_queue::commands_map client_commands_queue;
 
 	public:
+		server(std::shared_ptr<std::istream> buf);
 		void push_delta(double dt, double sync, const command_queue::commands_map &commands);
 		command_queue::commands_map pop_commands();
+		void update();
 	};
 
 	class client
@@ -67,6 +84,7 @@ namespace network
 	protected:
 		void handle_message(connection &conn, const message &msg);
 		std::shared_ptr<connection> conn;
+		size_t messages_counter = 0;
 
 		std::queue<
 		    std::pair<std::chrono::high_resolution_clock::time_point,
diff --git a/simulation.cpp b/simulation.cpp
index 505be766..c3497e64 100644
--- a/simulation.cpp
+++ b/simulation.cpp
@@ -89,6 +89,13 @@ void state_manager::process_commands() {
 			}
 		}
 
+		if (commanddata.command == user_command::focuspauseset) {
+			if( commanddata.param1 == 1.0 )
+				Global.iPause &= ~4; // odpauzowanie, gdy jest na pierwszym planie
+			else
+				Global.iPause |= 4; // włączenie pauzy, gdy nieaktywy
+		}
+
 		if (commanddata.command == user_command::entervehicle) {
 			// przesiadka do innego pojazdu
 			if (!commanddata.freefly)