server.h

#ifndef SERVER_H
#define SERVER_H

#include "connection.h"

#include <memory>
#include <vector>

/* A server listens to a port and handles multiple connections */
class Server {
      public:
        /* Creates a server that listens to a port */
        explicit Server(int port);

        /* Removes all registered connections */
        virtual ~Server();

        /* Returns true if the server has been initialized correctly */
        bool isReady() const;

        /* Waits for activity on the port. Returns a previously registered
           connection object if an existing client wishes to communicate,
           nullptr if a new client wishes to communicate */
        std::shared_ptr<Connection> waitForActivity() const;

        /* Registers a new connection */
        void registerConnection(const std::shared_ptr<Connection>& conn);

        /* Deregisters a connection */
        void deregisterConnection(const std::shared_ptr<Connection>& conn);

        /* Servers cannot be copied or assigned*/
        Server(const Server&) = delete;
        Server& operator=(const Server&) = delete;
        Server& operator=(Server&&) = delete;

        /* Servers can be move constructed */
        Server(Server&& o) :my_socket{o.my_socket},
                            connections(std::move(o.connections)),
                            pending_socket{o.pending_socket} {}

      protected:
        /* The number of the communication socket */
        int my_socket {Connection::no_socket};

        /* List of registered connections */
        std::vector<std::shared_ptr<Connection>> connections;

        /* Socket for a connection waiting to be registered */
        mutable int pending_socket {Connection::no_socket};

        /* Prints error message and exita */
        void error(const char* msg) const;
};

#endif