message_handler.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * Copyright (C) 2025 Marco Craveiro <marco.craveiro@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */
#ifndef ORES_COMMS_MESSAGING_MESSAGE_HANDLER_HPP
#define ORES_COMMS_MESSAGING_MESSAGE_HANDLER_HPP
 
#include <span>
#include <vector>
#include <cstdint>
#include <expected>
#include <boost/asio/awaitable.hpp>
#include "ores.comms/messaging/message_types.hpp"
 
namespace ores::comms::messaging {
 
struct message_type_range final {
    std::uint16_t min;
    std::uint16_t max;
 
    bool contains(message_type type) const {
        auto type_value = static_cast<std::uint16_t>(type);
        return type_value >= min && type_value <= max;
    }
 
    bool operator<(const message_type_range& other) const {
        return max < other.min; // Non-overlapping ranges
    }
};
 
class message_handler {
public:
    virtual ~message_handler() = default;
 
    virtual boost::asio::awaitable<std::expected<std::vector<std::byte>, error_code>>
    handle_message(message_type type, std::span<const std::byte> payload,
                   const std::string& remote_address) = 0;
};
 
}
 
#endif