Request.h

/*
 * MIT License
 *
 * Copyright (c) 2026 Adriano dos Santos Fernandes
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
#ifndef FBCPP_REQUEST_H
#define FBCPP_REQUEST_H
 
#include "fb-cpp-export.h"
#include "../fb-api.h"
#include "../Exception.h"
#include "RequestMessage.h"
#include "RequestMessageFormat.h"
#include "../SmartPtrs.h"
#include <cstddef>
#include <cstdint>
#include <utility>
#include <vector>
 
 
namespace fbcpp
{
    class Attachment;
    class Transaction;
}  // namespace fbcpp
 
 
namespace fbcpp::request
{
    class FB_CPP_EXPORT Request final
    {
    public:
        struct MessageEntry final
        {
            unsigned messageNumber;
 
            RequestMessageFormat format;
        };
 
    public:
        explicit Request(
            Attachment& attachment, std::span<const std::byte> blr, const std::vector<MessageEntry>& messages = {});
 
        Request(Request&& o) noexcept;
 
        Request& operator=(Request&& o) noexcept;
 
        Request(const Request&) = delete;
        Request& operator=(const Request&) = delete;
 
        ~Request() noexcept
        {
            if (isValid())
            {
                try
                {
                    free();
                }
                catch (...)
                {
                    // swallow
                }
            }
        }
 
    public:
        bool isValid() noexcept
        {
            return handle != nullptr;
        }
 
        Attachment& getAttachment() noexcept
        {
            return *attachment;
        }
 
        FbRef<fb::IRequest> getHandle() noexcept
        {
            return handle;
        }
 
        RequestMessage& getMessage(unsigned messageNumber);
 
        void free();
 
        void start(Transaction& transaction, unsigned level = 0);
 
        void startAndSend(Transaction& transaction, unsigned messageNumber, unsigned level = 0);
 
        void send(unsigned messageNumber, unsigned level = 0);
 
        bool receive(unsigned messageNumber, unsigned level = 0);
 
        void unwind(unsigned level = 0);
 
    private:
        RequestMessage* findMessage(unsigned messageNumber) const noexcept;
 
    private:
        Attachment* attachment;
        std::vector<std::pair<unsigned, RequestMessage>> messages;
        impl::StatusWrapper statusWrapper;
        FbRef<fb::IRequest> handle;
    };
}  // namespace fbcpp::request
 
 
#endif  // FBCPP_REQUEST_H