GroupsManager.h

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef WEB_WEBSOCKET_SERVER_CHANNELMANAGER_H
#define WEB_WEBSOCKET_SERVER_CHANNELMANAGER_H
 
namespace web::websocket::server {
    class SubProtocol;
} // namespace web::websocket::server
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstddef>
#include <functional>
#include <map>
#include <set>
#include <string>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace web::websocket::server {
 
    class GroupsManager {
    public:
        GroupsManager() = default;
        GroupsManager(const GroupsManager&) = delete;
 
        GroupsManager& operator=(const GroupsManager&) = delete;
 
    private:
        ~GroupsManager();
 
    public:
        static GroupsManager* instance();
 
        void subscribe(SubProtocol* subProtocol, std::string group = "");
        void unsubscribe(SubProtocol* subProtocol);
 
        void sendBroadcast(const std::string& group, const char* message, std::size_t messageLength, const SubProtocol* excludedClient);
        void sendBroadcast(const std::string& group, const std::string& message, const SubProtocol* excludedClient);
 
        void
        sendBroadcastStart(const std::string& group, const char* message, std::size_t messageLength, const SubProtocol* excludedClient);
        void sendBroadcastStart(const std::string& group, const std::string& message, const SubProtocol* excludedClient);
 
        void
        sendBroadcastFrame(const std::string& group, const char* message, std::size_t messageLength, const SubProtocol* excludedClient);
        void sendBroadcastFrame(const std::string& group, const std::string& message, const SubProtocol* excludedClient);
 
        void sendBroadcastEnd(const std::string& group, const char* message, std::size_t messageLength, const SubProtocol* excludedClient);
        void sendBroadcastEnd(const std::string& group, const std::string& message, const SubProtocol* excludedClient);
 
        void forEachClient(const std::string& group,
                           const std::function<void(const SubProtocol*)>& sendToClient,
                           const SubProtocol* excludedClient);
 
        static GroupsManager* groupsManager;
 
    private:
        std::map<std::string, std::set<SubProtocol*>> groups;
    };
 
} // namespace web::websocket::server
 
#endif // WEB_WEBSOCKET_SERVER_CHANNELMANAGER_H