OpenSpace/modules/softwareintegration/network/softwareconnection.h

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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2022                                                               *
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#ifndef __OPENSPACE_MODULE_SOFTWAREINTEGRATION___SOFTWARECONNECTION___H__
#define __OPENSPACE_MODULE_SOFTWAREINTEGRATION___SOFTWARECONNECTION___H__

#include <modules/softwareintegration/utils.h>
#include <openspace/network/messagestructures.h>
#include <ghoul/io/socket/tcpsocket.h>
#include <openspace/properties/property.h>

#include <unordered_set>
#include <unordered_map>

namespace openspace {

class Renderable;
class SoftwareConnection;

namespace softwareintegration::network {

struct NetworkState;
struct IncomingMessage;

namespace connection {
    void eventLoop(
        std::weak_ptr<SoftwareConnection> connectionWeakPtr,
        std::weak_ptr<softwareintegration::network::NetworkState> networkStateWeakPtr
    );

    IncomingMessage receiveMessageFromSoftware(
        std::shared_ptr<SoftwareConnection> connectionPtr
    );
} // namespace connection

} // namespace softwareintegration::network

using namespace softwareintegration::network;

class SoftwareConnection {

public:
    using OnChangeHandle = properties::Property::OnChangeHandle;
    struct PropertySubscription {
        OnChangeHandle onChangeHandle;
        bool shouldSendMessage{true};
    };
    using PropertyName = std::string;
    using PropertySubscriptions = std::unordered_map<PropertyName, OnChangeHandle>;
    using Identifier = std::string;
    using SubscribedProperties = std::unordered_map<Identifier, PropertySubscriptions>;

    explicit SoftwareConnection(std::unique_ptr<ghoul::io::TcpSocket> socket);
    SoftwareConnection(SoftwareConnection&& p);
    ~SoftwareConnection();

    void disconnect();
    bool isConnected() const;
    bool isConnectedOrConnecting() const;
    bool sendMessage(const std::string& message);

    void addPropertySubscription(
        const std::string& propertyName,
        const std::string& identifier,
        std::function<void()> newHandler
    );
    // std::shared_ptr<PropertySubscription> getPropertySubscription(
    //     const std::string& propertyName,
    //     const std::string& identifier
    // );

    void addSceneGraphNode(const std::string& identifier);
    void removeSceneGraphNode(const std::string& identifier);

    size_t id();
    void setThread(std::thread& t);

    friend void connection::eventLoop(
        std::weak_ptr<SoftwareConnection> connectionWeakPtr,
        std::weak_ptr<NetworkState> networkStateWeakPtr
    );

    friend IncomingMessage connection::receiveMessageFromSoftware(
        std::shared_ptr<SoftwareConnection> connectionPtr
    );

    void removePropertySubscription(const std::string& propertyName, const std::string& identifier);

    void removePropertySubscriptions(const std::string& identifier);

    ghoul::io::TcpSocket* socket();

private:

    SubscribedProperties _subscribedProperties;

    std::unordered_set<std::string> _sceneGraphNodes;

    std::unique_ptr<ghoul::io::TcpSocket> _socket;

    size_t _id;
    std::thread _thread;
    std::atomic_bool _shouldStopThread;

    static std::atomic_size_t _nextConnectionId;
};

} // namespace openspace

#endif // __OPENSPACE_MODULE_SOFTWAREINTEGRATION___SOFTWAREINTEGRATIONMODULE___H__