infinipaint/include/Helpers/NetworkingObjects/NetObjOrderedList.hpp

#pragma once
#include "Helpers/Networking/NetLibrary.hpp"
#include "NetObjPtr.hpp"
#include "NetObjID.hpp"
#include "cereal/archives/portable_binary.hpp"
#include "NetObjManagerTypeList.hpp"

namespace NetworkingObjects {
    enum class ObjPtrOrderedListCommand_StoC : uint8_t {
        INSERT_SINGLE,
        ERASE_SINGLE
    };

    enum class ObjPtrOrderedListCommand_CtoS : uint8_t {
        INSERT_SINGLE,
        ERASE_SINGLE
    };

    template <typename T> class NetObjOrderedListObjectInfo {
        public: 
            NetObjOrderedListObjectInfo(const NetObjPtr<T>& initObj, uint32_t initPos, bool initSyncIgnore):
                obj(initObj),
                pos(initPos),
                syncIgnore(initSyncIgnore)
            {}
            uint32_t get_pos() const { return pos; }
            const NetObjPtr<T>& get_obj() const { return obj; }
        private:
            NetObjPtr<T> obj;
            uint32_t pos;
            bool syncIgnore;
            template <typename S> friend class NetObjOrderedList;
            template <typename S> friend class NetObjOrderedListServer;
            template <typename S> friend class NetObjOrderedListClient;
            template <typename S> friend void set_positions_for_object_info_vector(std::vector<std::shared_ptr<NetObjOrderedListObjectInfo<S>>>& v, uint32_t i);
    };

    template <typename T> using NetObjOrderedListObjectInfoPtr = std::shared_ptr<NetObjOrderedListObjectInfo<T>>;

    template <typename T> void set_positions_for_object_info_vector(std::vector<NetObjOrderedListObjectInfoPtr<T>>& v, uint32_t i = 0) {
        uint32_t vSize = static_cast<uint32_t>(v.size());
        for(; i < vSize; i++)
            v[i]->pos = i;
    }

    template <typename T> class NetObjOrderedList {
        public:
            // Don't use this function unless you're sure that class T isn't a base class
            template <typename ...Args> NetObjPtr<T> emplace_back_direct(const NetObjPtr<NetObjOrderedList<T>>& l, Args&&... items) {
                NetObjPtr<T> newObj = l.get_obj_man()->template make_obj_direct<T>(items...);
                l->push_back(l, newObj);
                return newObj;
            }
            static NetObjPtr<T> push_back_and_send_create(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjPtr<T>& newObj) {
                l->push_back(l, newObj);
                return newObj;
            }
            static NetObjPtr<T> insert_and_send_create(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t posToInsertAt, const NetObjPtr<T>& newObj) {
                l->insert(l, posToInsertAt, newObj);
                return newObj;
            }
            static void erase(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t indexToErase) {
                l->erase_by_index(l, indexToErase);
            }
            static void erase(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjOrderedListObjectInfoPtr<T>& p) {
                l->erase_by_ptr(l, p);
            }
            virtual uint32_t size() const = 0;
            virtual const std::vector<NetObjOrderedListObjectInfoPtr<T>>& get_data() const = 0;
            virtual ~NetObjOrderedList() {}
        protected:
            virtual void push_back(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjPtr<T>& newObj) = 0;
            virtual void insert(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t posToInsertAt, const NetObjPtr<T>& newObj) = 0;
            virtual void erase_by_index(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t indexToErase) = 0;
            virtual void erase_by_ptr(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjOrderedListObjectInfoPtr<T>& p) = 0;
            virtual void write_constructor(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryOutputArchive& a) = 0;
            virtual void read_update(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>&) = 0;
            virtual void read_constructor_post_allocation(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>&) = 0;
        private:
            template <typename S> friend void register_ordered_list_class(NetObjManagerTypeList& t);
            static void write_constructor_func(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryOutputArchive& a) {
                l->write_constructor(l, a);
            }
            static NetObjPtr<void> read_constructor_func(NetObjManager& objMan, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>& c);
            static void read_update_func(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>& c) {
                l->read_update(l, a, c);
            }
    };

    template <typename T> class NetObjOrderedListServer : public NetObjOrderedList<T> {
        public:
            NetObjOrderedListServer() {}
            virtual uint32_t size() const override {
                return data.size();
            }
            virtual const std::vector<NetObjOrderedListObjectInfoPtr<T>>& get_data() const override {
                return data;
            }
        protected:
            virtual void push_back(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjPtr<T>& newObj) override {
                auto& newObjInfoPtr = data.emplace_back(std::make_shared<NetObjOrderedListObjectInfo<T>>(newObj, static_cast<uint32_t>(data.size()), false));
                l.send_server_update_to_all_clients(RELIABLE_COMMAND_CHANNEL, [&newObjInfoPtr](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_StoC::INSERT_SINGLE, newObjInfoPtr->pos);
                    newObjInfoPtr->obj.write_create_message(a);
                });
            }
            virtual void insert(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t posToInsertAt, const NetObjPtr<T>& newObj) override {
                posToInsertAt = std::min<uint32_t>(posToInsertAt, data.size());
                auto& newObjInfoPtr = *data.insert(data.begin() + posToInsertAt, std::make_shared<NetObjOrderedListObjectInfo<T>>(newObj, posToInsertAt, false));
                set_positions_for_object_info_vector<T>(data, posToInsertAt);
                l.send_server_update_to_all_clients(RELIABLE_COMMAND_CHANNEL, [&newObjInfoPtr](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_StoC::INSERT_SINGLE, newObjInfoPtr->pos);
                    newObjInfoPtr->obj.write_create_message(a);
                });
            }
            virtual void erase_by_index(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t indexToErase) override {
                l.send_server_update_to_all_clients(RELIABLE_COMMAND_CHANNEL, [indexToErase](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_StoC::ERASE_SINGLE, indexToErase);
                });
                data.erase(data.begin() + indexToErase);
                set_positions_for_object_info_vector<T>(data, indexToErase);
            }
            virtual void erase_by_ptr(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjOrderedListObjectInfoPtr<T>& p) override {
                l.send_server_update_to_all_clients(RELIABLE_COMMAND_CHANNEL, [indexToErase = p->pos](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_StoC::ERASE_SINGLE, indexToErase);
                });
                uint32_t iToErase = p->pos; // We only have a reference to the pointer, so erasing it might destroy the pointer object. Save the index before erasing
                data.erase(data.begin() + iToErase);
                set_positions_for_object_info_vector<T>(data, iToErase);
            }
            virtual void write_constructor(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryOutputArchive& a) override {
                a(static_cast<uint32_t>(data.size()));
                for(size_t i = 0; i < data.size(); i++)
                    data[i]->obj.write_create_message(a);
            }
            virtual void read_constructor_post_allocation(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>& c) override {
                uint32_t constructedSize;
                a(constructedSize);
                data.clear();
                for(uint32_t i = 0; i < constructedSize; i++)
                    data.emplace_back(std::make_shared<NetObjOrderedListObjectInfo<T>>(l.get_obj_man()->template read_create_message<T>(a, c), static_cast<uint32_t>(data.size()), false));
                // Dont send the object data to all clients in the constructor, as the function that called read_create_message is also the one that will decide where to send the data of the constructed object
                // Example: the INSERT_SINGLE command in read_update, if it was inserting another NetObjOrderedList, would first construct the list using read_create_message, then it will call insert() to send it to clients
            }
            virtual void read_update(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>& c) override {
                ObjPtrOrderedListCommand_CtoS command;
                a(command);
                switch(command) {
                    case ObjPtrOrderedListCommand_CtoS::INSERT_SINGLE:
                        uint32_t newPos;
                        a(newPos);
                        insert(l, newPos, l.get_obj_man()->template read_create_message<T>(a, c));
                        break;
                    case ObjPtrOrderedListCommand_CtoS::ERASE_SINGLE:
                        NetObjID idToErase;
                        a(idToErase);
                        std::erase_if(data, [&](NetObjOrderedListObjectInfoPtr<T>& o) {
                            if(o->obj.get_net_id() == idToErase) {
                                erase_by_ptr(l, o);
                                return true;
                            }
                            return false;
                        });
                        break;
                }
            }
        private:
            std::vector<NetObjOrderedListObjectInfoPtr<T>> data;
    };

    template <typename T> class NetObjOrderedListClient : public NetObjOrderedList<T> {
        public:
            NetObjOrderedListClient() {}
            virtual uint32_t size() const override {
                return clientData.size();
            }
            virtual const std::vector<NetObjOrderedListObjectInfoPtr<T>>& get_data() const override {
                return clientData;
            }
        protected:
            virtual void push_back(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjPtr<T>& newObj) override {
                auto& newObjInfoPtr = clientData.emplace_back(std::make_shared<NetObjOrderedListObjectInfo<T>>(newObj, static_cast<uint32_t>(clientData.size()), true));
                l.send_client_update(RELIABLE_COMMAND_CHANNEL, [&newObjInfoPtr](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_CtoS::INSERT_SINGLE, newObjInfoPtr->pos);
                    newObjInfoPtr->obj.write_create_message(a);
                });
            }
            virtual void insert(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t posToInsertAt, const NetObjPtr<T>& newObj) {
                posToInsertAt = std::min<uint32_t>(posToInsertAt, clientData.size());
                auto& newObjInfoPtr = *clientData.insert(clientData.begin() + posToInsertAt, std::make_shared<NetObjOrderedListObjectInfo<T>>(newObj, posToInsertAt, true));
                l.send_client_update(RELIABLE_COMMAND_CHANNEL, [&newObjInfoPtr](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_CtoS::INSERT_SINGLE, newObjInfoPtr->pos);
                    newObjInfoPtr->obj.write_create_message(a);
                });
            }
            virtual void erase_by_index(const NetObjPtr<NetObjOrderedList<T>>& l, uint32_t indexToErase) override {
                indexToErase = std::min<uint32_t>(indexToErase, clientData.size());
                auto& newObjInfoPtr = clientData[indexToErase];
                l.send_client_update(RELIABLE_COMMAND_CHANNEL, [&newObjInfoPtr](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_CtoS::ERASE_SINGLE, newObjInfoPtr->obj.get_net_id());
                });
                clientData.erase(clientData.begin() + indexToErase);
                set_positions_for_object_info_vector<T>(clientData, indexToErase);
            }
            virtual void erase_by_ptr(const NetObjPtr<NetObjOrderedList<T>>& l, const NetObjOrderedListObjectInfoPtr<T>& p) override {
                l.send_client_update(RELIABLE_COMMAND_CHANNEL, [&p](const NetObjPtr<NetObjOrderedList<T>>&, cereal::PortableBinaryOutputArchive& a) {
                    a(ObjPtrOrderedListCommand_CtoS::ERASE_SINGLE, p->obj.get_net_id());
                });
                uint32_t iToErase = p->pos;
                clientData.erase(clientData.begin() + iToErase);
                set_positions_for_object_info_vector<T>(clientData, iToErase);
            }
            virtual void write_constructor(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryOutputArchive& a) override {
                a(static_cast<uint32_t>(clientData.size()));
                for(size_t i = 0; i < clientData.size(); i++)
                    clientData[i]->obj.write_create_message(a);
            }
            virtual void read_constructor_post_allocation(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>&) override {
                uint32_t constructedSize;
                a(constructedSize);
                clientData.clear();
                serverData.clear();
                for(uint32_t i = 0; i < constructedSize; i++)
                    serverData.emplace_back(std::make_shared<NetObjOrderedListObjectInfo<T>>(l.get_obj_man()->template read_create_message<T>(a, nullptr), static_cast<uint32_t>(serverData.size()), false));
                clientData = serverData;
            }
            virtual void read_update(const NetObjPtr<NetObjOrderedList<T>>& l, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>&) override {
                ObjPtrOrderedListCommand_StoC c;
                a(c);
                switch(c) {
                    case ObjPtrOrderedListCommand_StoC::INSERT_SINGLE:
                        uint32_t newPos;
                        a(newPos);
                        serverData.insert(serverData.begin() + newPos, std::make_shared<NetObjOrderedListObjectInfo<T>>(l.get_obj_man()->template read_create_message<T>(a, nullptr), newPos, false));
                        break;
                    case ObjPtrOrderedListCommand_StoC::ERASE_SINGLE:
                        uint32_t posToErase;
                        a(posToErase);
                        serverData.erase(serverData.begin() + posToErase);
                        break;
                }
            }
        private:
            std::vector<NetObjOrderedListObjectInfoPtr<T>> serverData;
            std::vector<NetObjOrderedListObjectInfoPtr<T>> clientData;
    };

    template <typename T> NetObjPtr<void> NetObjOrderedList<T>::read_constructor_func(NetObjManager& objMan, cereal::PortableBinaryInputArchive& a, const std::shared_ptr<NetServer::ClientData>& c) {
        NetObjPtr<NetObjOrderedList<T>> allocatedPtr = objMan.make_obj<NetObjOrderedList<T>>();
        allocatedPtr->read_constructor_post_allocation(allocatedPtr, a, c);
        return allocatedPtr.template cast<void>();
    }

    template <typename S> void register_ordered_list_class(NetObjManagerTypeList& t) {
        t.register_class<NetObjOrderedList<S>, NetObjOrderedList<S>, NetObjOrderedListClient<S>, NetObjOrderedListServer<S>>({
            .writeConstructorFuncClient = NetObjOrderedList<S>::write_constructor_func,
            .readConstructorFuncClient = NetObjOrderedList<S>::read_constructor_func,
            .readUpdateFuncClient = NetObjOrderedList<S>::read_update_func,
            .writeConstructorFuncServer = NetObjOrderedList<S>::write_constructor_func,
            .readConstructorFuncServer = NetObjOrderedList<S>::read_constructor_func,
            .readUpdateFuncServer = NetObjOrderedList<S>::read_update_func,
        });
    }
}