two direction connections with blockers working

src/connection-manager.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include "connection.h"
+#include <map>
+
+class ConnectionManager{
+
+	public:
+
+		ConnectionManager() {}
+
+		std::vector<Connection> connections;
+
+		std::map<Node*, int> counter;
+
+		Node* next(Node* current){
+			std::vector<Connection*> paths;
+
+			for(auto& p : connections){
+				if((p.v1 == current && p.v1_v2) || (p.v2 == current && p.v2_v1)) {
+					p.active = false;
+					paths.push_back(&p);
+				}
+			}
+
+			if(paths.empty()) return nullptr;
+			
+			int return_path = 0;
+			if(counter.find(current) == counter.end()) {
+				counter[current] = 0;
+			} else {
+				counter[current] = (counter[current] + 1) % paths.size();
+				return_path = counter[current];
+			}
+			paths[return_path]->active = true;	
+			return paths[return_path]->v1 == current ? paths[return_path]->v2 : paths[return_path]->v1;
+		}
+
+		void draw(){
+			for(auto& c : connections){
+				c.draw();
+			}
+		}
+};