Lines having an ID allows removal :D

src/client/client.cpp

@@ -23,8 +23,20 @@ namespace games {
 				break;
 			case LWS_CALLBACK_CLIENT_RECEIVE:
 				try {
-					auto l = from_json<cheap_line_type>(parse_json(std::string((char*)in, len)));
+					std::string instr((char*)in, len);
+					auto object = parse_json(instr).getObject();
+					auto command = object["command"];
+					if(command == "remove lines"){
+						for(auto js : object["data"].getArray()){
+							auto ID = from_json<int>(js);
+							current_client->remove_line(ID);
+						}
+					} else if (command == "add lines"){
+						for(auto js : object["data"].getArray()){
+							auto l = from_json<cheap_line_type>(js);
 							current_client->add_line(l);
+						}
+					}
 				} catch(std::exception& e){
 					throw websockets::runtime_error(e.what());
 				}
@@ -64,6 +76,7 @@ namespace games {
 	}
 
 	void Client::add_line(cheap_line_type const & line_in){
+		std::cout << "adding line: " << line_in.ID << std::endl;
 		auto line = create_instrument(line_in);
 		line->sound.reset(new motor::al::Source(sounds[line->line_kind]));
 		lines.push_back(line);
@@ -76,6 +89,19 @@ namespace games {
 		update_pitches(*this);
 	}
 
+	void Client::remove_line(int ID){
+		for(auto const & l : lines){
+			if(l->ID != ID) continue;
+			auto& v = sim.lines;
+			v.erase(std::remove_if(v.begin(), v.end(), [l](line_type const &l2){ return l.get() == l2.information; }), v.end());
+		}
+
+		auto& v = lines;
+		v.erase(std::remove_if(v.begin(), v.end(), [ID](std::shared_ptr<Instrument> const & l){ return l->ID == ID; }), v.end());
+
+		lines_changed = true;
+	}
+
 	bool Client::has_ended(){
 		return false;
 	}
@@ -170,6 +196,7 @@ namespace games {
 		if(input.keys_went_down[SDLK_l]){
 			lines.clear();
 			sim.lines.clear();
+			lines_changed = true;
 		}
 
 		if(input.keys_went_down[SDLK_r]){

src/client/client.hpp

@@ -50,6 +50,7 @@ namespace games {
 		bool pause{false};
 
 		void add_line(cheap_line_type const & line);
+		void remove_line(int ID);
 
 		// Sound part
 		const std::vector<std::string> scale_files{

src/client/client_common.hpp

@@ -32,14 +32,16 @@ struct Instrument {
 	math::Vec2 starting_point;
 	math::Vec2 end_point;
 
+	int ID;
 	int line_kind;
 	float color_intensity{0.0};
 	
 	Instrument() = default;
 
-	Instrument(math::Vec2 starting_point, math::Vec2 end_point, int line_kind)
+	Instrument(math::Vec2 starting_point, math::Vec2 end_point, int line_kind, int ID)
 	: starting_point(starting_point)
 	, end_point(end_point)
+	, ID(ID)
 	, line_kind(line_kind)
 	{}
 	
@@ -109,12 +111,14 @@ BOOST_FUSION_ADAPT_STRUCT(
 struct cheap_line_type {
 	IntVec2 starting_point;
 	IntVec2 end_point;
+	int ID;
 	int line_kind;
 
 	cheap_line_type() = default;
 	cheap_line_type(Instrument const & l)
 	: starting_point(l.starting_point)
 	, end_point(l.end_point)
+	, ID(l.ID)
 	, line_kind(l.line_kind)
 	{}
 };
@@ -123,12 +127,14 @@ inline std::shared_ptr<Instrument> create_instrument(cheap_line_type l){
 	return std::make_shared<Instrument>(
 		to_FloatVec2(l.starting_point),
 		to_FloatVec2(l.end_point),
-		l.line_kind);
+		l.line_kind,
+		l.ID);
 }
 
 BOOST_FUSION_ADAPT_STRUCT(
 	cheap_line_type,
 	(IntVec2, starting_point)
 	(IntVec2, end_point)
+	(int, ID)
 	(int, line_kind)
 )