Method UpdateRelayAlive

src/render_panel/gr_statistics.cpp:231–244

    }

    void GrStatistics::UpdateRelayAlive(const std::string& device_id, int64_t timestamp) {
        auto opt_ra = relays_alive_.TryGet(device_id);
        if (opt_ra.has_value()) {
            auto ra = opt_ra.value();
            ra->last_update_ts_ = timestamp;
        }
        else {
            auto ra = std::make_shared<GrStatRelayAlive>();
            ra->device_id_ = device_id;
            ra->created_ts_ = timestamp;
            ra->last_update_ts_ = timestamp;
            relays_alive_.Insert(device_id, ra);
        }
    }

    int64_t GrStatistics::GetRelayLastUpdateTimestamp(const std::string& device_id) {
        if (auto r = relays_alive_.TryGet(device_id); r.has_value()) {