KSG-Netzwerk/Network/WebSocket.h

#pragma once

#include <Critical.h>
#include <functional>
#include <Random.h>
#include <Thread.h>

#include "Client.h"

namespace Network
{
    namespace WebSocket
    {
        struct Frame
        {
            bool fin, rsv1, rsv2, rsv3; // bit 0 to 3
            char opcode;                // bit 4 to 7
            bool mask;                  // bit 8
            __int64 dataLength;         // bit 9 to 15 or to 31 or to 79
            unsigned char key[4]; // if mask = 1 then the next 32 bits
            char* data;           // the data
            // combines frames that belong to a message
            __declspec(dllexport) Frame& operator+=(const Frame& b);
        };

        enum DataType
        {
            TEXT,
            BINARY
        };

        class WebSocketClient : public Framework::Thread
        {
        private:
            std::function<void(
                WebSocketClient*, __int64 size, const char* data, DataType typ)>
                callback;
            Client* client;
            Framework::Text path;
            Framework::Text host;
            Frame* lastPingFrame;
            Array<Frame>* queue;
            unsigned short port;
            Critical c;
            Critical c2;
            RandomGenerator gen;
            bool nextClose;

        public:
            // Creates a new WebSocket
            //  path: The path to the resource
            //  host: The address of the server
            //  port: The port of the server
            __declspec(dllexport) WebSocketClient(
                const char* path, const char* host, unsigned short port);
            __declspec(dllexport) virtual ~WebSocketClient();
            // Sets the function to be called for processing server messages
            __declspec(dllexport) void setMessageCallback(
                std::function<void(WebSocketClient*,
                    __int64 size,
                    const char* data,
                    DataType typ)> callback);
            // Performs the WebSocket handshake if not yet connected
            __declspec(dllexport) bool connect();
            // Sends a message to the server
            //  size: The length of the message
            //  data: The data
            //  typ: The type of the message
            __declspec(dllexport) bool send(
                __int64 size, const char* data, DataType typ = TEXT);
            // This function processes server messages. It should not be called manually as it is started automatically
            __declspec(dllexport) void thread() override;
            // aborts the connection
            __declspec(dllexport) void disconnect();
            // Returns 1 if a connection to the server exists, 0 otherwise
            __declspec(dllexport) bool isConnected() const;
        };
    } // namespace WebSocket
} // namespace Network