Actor.h

/*
 * qb - C++ Actor Framework
 * Copyright (C) 2011-2019 isndev (www.qbaf.io). All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 *         limitations under the License.
 */

#ifndef QB_ACTOR_H
# define QB_ACTOR_H
# include <vector>
# include <map>
# include <unordered_map>
// include from qb
# include <qb/utility/nocopy.h>
# include "ICallback.h"
# include "ProxyPipe.h"
# include "Event.h"

namespace qb {

    class VirtualCore;

    class Actor
            : nocopy
            , ActorId
    {
        friend class VirtualCore;

        mutable bool _alive = true;
        VirtualCore * _handler = nullptr;
        void __set_id(ActorId const &id);
    protected:
        void __set_id(uint16_t const sid, uint16_t const cid);
        template <typename Tag>
        static uint16_t registerIndex();

        Actor() = default;

        virtual ~Actor() = default;

        virtual bool onInit() = 0;

    public:
        void kill() const;

    protected:
        void on(KillEvent const &event);

    public:

        class EventBuilder {
            friend class Actor;
            ProxyPipe dest_pipe;

            EventBuilder() = delete;
            EventBuilder(ProxyPipe const &pipe);
        public:
            EventBuilder(EventBuilder const &rhs) = default;

            template<typename _Event, typename ..._Args>
            EventBuilder &push(_Args &&...args);
        };

        ActorId id() const { return *this; }

        uint16_t getIndex() const;

        template <typename T>
        static ActorId getServiceId(uint16_t const index);

        uint64_t time() const;

        bool isAlive() const;

        template <typename _Actor>
        void registerCallback(_Actor &actor) const;

        template <typename _Actor>
        void unregisterCallback(_Actor &actor) const;

        void unregisterCallback() const;


        template<typename _Event, typename _Actor>
        void registerEvent(_Actor &actor);

        template<typename _Event, typename _Actor>
        void unregisterEvent(_Actor &actor);

        template<typename _Event>
        void unregisterEvent();

        EventBuilder to(ActorId const dest) const;

        template<typename _Event, typename ..._Args>
        _Event &push(ActorId const &dest, _Args &&...args) const;

        template<typename _Event, typename ..._Args>
        void send(ActorId const &dest, _Args &&...args) const;

        void reply(Event &event) const;

        void forward(ActorId const dest, Event &event) const;

        // OpenApi : internal future use
        // void send(Event const &event) const;
        // void push(Event const &event) const;
        // bool try_send(Event const &event) const;

        ProxyPipe getPipe(ActorId const dest) const;

        template<typename _Actor, typename ..._Args>
        _Actor *addRefActor(_Args &&...args) const;

    };

    class Service {};

    template <typename Tag>
    class ServiceActor : public Service, public Actor {
        static const uint16_t ServiceIndex;
    public:
        ServiceActor() {
            __set_id(ServiceIndex, 0);
        }
    };

}

qb::io::stream &operator<<(qb::io::stream &os, qb::Actor const &actor);

#endif //QB_ACTOR_H