Split main into more headers

src/app.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <chrono>
+#include <cmath>
+#include <vector>
+#include <algorithm>
+
+#include "basics.h"
+
+struct App{
+	std::vector<User*> people_online;
+	int uid{0};
+
+	void update_positions(){
+		const float speed = 0.4;
+
+		typedef std::chrono::duration<double, std::ratio<1,1>> fseconds;
+		static auto start = std::chrono::steady_clock::now();
+		auto end = std::chrono::steady_clock::now();
+		double time = std::chrono::duration_cast<fseconds>(end-start).count();
+
+		//std::cout << time << std::endl;
+		auto n = people_online.size();
+		for(int i = 0; i < n; ++i){
+			User& user = *people_online[i];
+			double x = cos(speed * time + 2*M_PI*i/double(n));
+			double y = sin(speed * time + 2*M_PI*i/double(n));
+
+			user.position.x = 200 + 200*x;
+			user.position.y = 200 + 200*y;
+		}
+	}
+
+	void login(User& user){
+		user.index = uid++;
+		people_online.push_back(&user);
+	}
+
+	void logout(User& user){
+		people_online.erase(std::remove(people_online.begin(), people_online.end(), &user), people_online.end());
+	}
+};

src/basics.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <string>
+#include <boost/fusion/include/define_struct.hpp>
+#include <boost/fusion/include/adapt_struct.hpp>
+
+struct Empty{};
+
+BOOST_FUSION_DEFINE_STRUCT(
+	, Size,
+	(int, width)
+	(int, height)
+)
+
+BOOST_FUSION_DEFINE_STRUCT(
+	, Position,
+	(int, x)
+	(int, y)
+)
+
+BOOST_FUSION_DEFINE_STRUCT(
+	, IncomingPacket,
+	(std::string, name)
+	(Size, size)
+)
+
+struct User {
+	unsigned int index{0};
+	std::string name{"Unknown guest"};
+
+	Size size{0,0};
+	Position position{0,0};
+
+	User& operator=(IncomingPacket const & p){
+		name = p.name;
+		size = p.size;
+		return *this;
+	}
+};
+
+BOOST_FUSION_ADAPT_STRUCT(
+	User,
+	(unsigned int, index)
+	(std::string, name)
+	(Size, size)
+	(Position, position)
+)

src/json_ext.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "json.h"
+
+template <typename C>
+inline js::Value ptrvector_to_json(C const & container){
+	js::Array array;
+	for(auto x : container){
+		array.push_back(to_json(*x));
+	}
+	return array;
+}

src/main.cpp

@@ -1,105 +1,32 @@
-
+#include <memory>
 #include <string>
-#include <vector>
-#include <algorithm>
-#include <chrono>
-#include <cmath>
+#include <stdexcept>
 
 #include <lib/libwebsockets.h>
-#include "json.h"
 #include "websockets.h"
 
-template <typename C>
-inline js::Value ptrvector_to_json(C const & container){
-	js::Array array;
-	for(auto x : container){
-		array.push_back(to_json(*x));
-	}
-	return array;
-}
+#include "json.h"
+#include "json_ext.h"
 
-BOOST_FUSION_DEFINE_STRUCT(
-	, Size,
-	(int, width)
-	(int, height)
-)
+#include "basics.h"
+#include "app.h"
 
-BOOST_FUSION_DEFINE_STRUCT(
-	, Position,
-	(int, x)
-	(int, y)
-)
-
-BOOST_FUSION_DEFINE_STRUCT(
-	, IncomingPacket,
-	(std::string, name)
-	(Size, size)
-)
-
-int uid = 0;
-struct User {
-	unsigned int index{0};
-	std::string name{"Unknown guest"};
-
-	Size size{0,0};
-	Position position{0,0};
-
-	User()
-	: index(uid++)
-	{}
-
-	User& operator=(IncomingPacket const & p){
-		name = p.name;
-		size = p.size;
-		return *this;
-	}
-};
-
-BOOST_FUSION_ADAPT_STRUCT(
-	User,
-	(unsigned int, index)
-	(std::string, name)
-	(Size, size)
-	(Position, position)
-)
-
-// unfortunately libwebsockets owns the user thingy
-std::vector<User*> people_online;
-
-inline void update_positions(){
-	const float speed = 0.4;
-
-	typedef std::chrono::duration<double, std::ratio<1,1>> fseconds;
-	static auto start = std::chrono::steady_clock::now();
-	auto end = std::chrono::steady_clock::now();
-	double time = std::chrono::duration_cast<fseconds>(end-start).count();
-
-	//std::cout << time << std::endl;
-	auto n = people_online.size();
-	for(int i = 0; i < n; ++i){
-		User& user = *people_online[i];
-		double x = cos(speed * time + 2*M_PI*i/double(n));
-		double y = sin(speed * time + 2*M_PI*i/double(n));
-
-		user.position.x = 200 + 200*x;
-		user.position.y = 200 + 200*y;
-	}
-}
 
+std::unique_ptr<App> app;
 
 websockets::TestProtocol<User> default_protocol{
 	// connection established
 	[](User& user){
-		people_online.push_back(&user);
+		app->login(user);
 	},
 	// connection closed
 	[](User& user){
-		people_online.erase(std::remove(people_online.begin(), people_online.end(), &user), people_online.end());
+		app->logout(user);
 	},
 	// write (will always come after receive)
 	[](User& user) -> std::string{
-		update_positions();
-		return write_json(ptrvector_to_json(people_online));
+		app->update_positions();
+		return write_json(ptrvector_to_json(app->people_online));
 	},
 	// receive
 	[](User& user, std::string in){
@@ -111,8 +38,6 @@ websockets::TestProtocol<User> default_protocol{
 	}
 };
 
-struct Empty{};
-
 websockets::TestProtocol<Empty> observer_protocol{
 	// connection established
 	[](Empty& user){},
@@ -120,14 +45,16 @@ websockets::TestProtocol<Empty> observer_protocol{
 	[](Empty& user){},
 	// write (will always come after receive)
 	[](Empty& user) -> std::string{
-		update_positions();
-		return write_json(ptrvector_to_json(people_online));
+		app->update_positions();
+		return write_json(ptrvector_to_json(app->people_online));
 	},
 	// receive
 	[](Empty& user, std::string in){}
 };
 
 int main(int argc, char **argv){
+	app.reset(new App);
+
 	libwebsocket_protocols protocols[] = {
 		WSstandard_protocol("default", default_protocol),
 		WSstandard_protocol("observer", observer_protocol),