src/app/MessageDef/InvokeRequestMessage.h

/**
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    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.
 */

#pragma once

#include <app/AppConfig.h>
#include <app/util/basic-types.h>
#include <lib/core/CHIPCore.h>
#include <lib/core/TLV.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>

#include "InvokeRequests.h"
#include "MessageBuilder.h"
#include "MessageParser.h"

namespace chip {
namespace app {
namespace InvokeRequestMessage {
enum class Tag : uint8_t
{
    kSuppressResponse = 0,
    kTimedRequest     = 1,
    kInvokeRequests   = 2,
};

class Parser : public MessageParser
{
public:
#if CHIP_CONFIG_IM_PRETTY_PRINT
    CHIP_ERROR PrettyPrint() const;
#endif // CHIP_CONFIG_IM_PRETTY_PRINT

    /**
     *  @brief Get SuppressResponse. Next() must be called before accessing them.
     *
     *  @return #CHIP_NO_ERROR on success
     *          #CHIP_END_OF_TLV if there is no such element
     */
    CHIP_ERROR GetSuppressResponse(bool * const apSuppressResponse) const;

    /**
     *  @brief Get TimedRequest. Next() must be called before accessing them.
     *
     *  @return #CHIP_NO_ERROR on success
     *          #CHIP_END_OF_TLV if there is no such element
     */
    CHIP_ERROR GetTimedRequest(bool * const apTimedRequest) const;

    /**
     *  @brief Get a parser for an InvokeRequests.
     *
     *  @param [in] apInvokeRequests    A pointer to the invoke request list parser.
     *
     *  @return #CHIP_NO_ERROR on success
     *          #CHIP_END_OF_TLV if there is no such element
     */
    CHIP_ERROR GetInvokeRequests(InvokeRequests::Parser * const apInvokeRequests) const;
};

class Builder : public MessageBuilder
{
public:
    /**
     *  @brief Performs underlying StructBuilder::Init, but reserves memory need in
     *  EndOfInvokeRequestMessage() with underlying TLVWriter.
     */
    CHIP_ERROR InitWithEndBufferReserved(TLV::TLVWriter * const apWriter);

    /**
     *  @brief when sets to true, it means do not send a response to this action
     */
    InvokeRequestMessage::Builder & SuppressResponse(const bool aSuppressResponse);

    /**
     *  @brief This is flag to indication if ths action is part of a timed invoke transaction
     */
    InvokeRequestMessage::Builder & TimedRequest(const bool aTimedRequest);

    /**
     *  @brief Initialize a InvokeRequests::Builder for writing into the TLV stream
     *
     *  @return A reference to InvokeRequests::Builder
     */
    InvokeRequests::Builder & CreateInvokeRequests(const bool aReserveEndBuffer = false);

    /**
     *  @brief Get reference to InvokeRequests::Builder
     *
     *  @return A reference to InvokeRequests::Builder
     */
    InvokeRequests::Builder & GetInvokeRequests() { return mInvokeRequests; }

    /**
     *  @brief Mark the end of this InvokeRequestMessage
     *
     *  @return The builder's final status.
     */
    CHIP_ERROR EndOfInvokeRequestMessage();

    /**
     *  @brief Get number of bytes required in the buffer by EndOfInvokeRequestMessage()
     *
     *  @return Expected number of bytes required in the buffer by EndOfInvokeRequestMessage()
     */
    uint32_t GetSizeToEndInvokeRequestMessage();

private:
    InvokeRequests::Builder mInvokeRequests;
    bool mIsEndBufferReserved = false;
};
} // namespace InvokeRequestMessage
} // namespace app
} // namespace chip