src/platform/qpg/OTAImageProcessorImpl.cpp

/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *    All rights reserved.
 *
 *    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.
 */

#include <app/clusters/ota-requestor/OTADownloader.h>

#include "OTAImageProcessorImpl.h"

namespace chip {

CHIP_ERROR OTAImageProcessorImpl::PrepareDownload()
{

    // Get OTA status - under what circumstances does prepared break?
    // what happens if a prepare is pending and another one is invoked
    // Should we store the state here and wait til we receive notification

    DeviceLayer::PlatformMgr().ScheduleWork(HandlePrepareDownload, reinterpret_cast<intptr_t>(this));
    return CHIP_NO_ERROR;
}

CHIP_ERROR OTAImageProcessorImpl::Finalize()
{
    DeviceLayer::PlatformMgr().ScheduleWork(HandleFinalize, reinterpret_cast<intptr_t>(this));
    return CHIP_NO_ERROR;
}

CHIP_ERROR OTAImageProcessorImpl::Apply()
{
    return CHIP_NO_ERROR;
}

CHIP_ERROR OTAImageProcessorImpl::Abort()
{
    if (mParams.imageFile.empty())
    {
        ChipLogError(SoftwareUpdate, "Invalid output image file supplied");
        return CHIP_ERROR_INTERNAL;
    }

    DeviceLayer::PlatformMgr().ScheduleWork(HandleAbort, reinterpret_cast<intptr_t>(this));
    return CHIP_NO_ERROR;
}

CHIP_ERROR OTAImageProcessorImpl::ProcessBlock(ByteSpan & block)
{
    if (!1 /* What stops us processing a block?*/)
    {
        return CHIP_ERROR_INTERNAL;
    }

    if ((block.data() == nullptr) || block.empty())
    {
        return CHIP_ERROR_INVALID_ARGUMENT;
    }

    // Store block data for HandleProcessBlock to access
    CHIP_ERROR err = SetBlock(block);
    if (err != CHIP_NO_ERROR)
    {
        ChipLogError(SoftwareUpdate, "Cannot set block data: %" CHIP_ERROR_FORMAT, err.Format());
    }

    DeviceLayer::PlatformMgr().ScheduleWork(HandleProcessBlock, reinterpret_cast<intptr_t>(this));
    return CHIP_NO_ERROR;
}

void OTAImageProcessorImpl::HandlePrepareDownload(intptr_t context)
{
    qvCHIP_OtaStatus_t status = qvCHIP_OtaStatusSuccess;
    auto * imageProcessor     = reinterpret_cast<OTAImageProcessorImpl *>(context);
    if (imageProcessor == nullptr)
    {
        ChipLogError(SoftwareUpdate, "ImageProcessor context is null");
        return;
    }
    else if (imageProcessor->mDownloader == nullptr)
    {
        ChipLogError(SoftwareUpdate, "mDownloader is null");
        return;
    }

    // running this in a thread so won't block main event loop
    ChipLogProgress(SoftwareUpdate, "Q: HandlePrepareDownload");

    qvCHIP_OtaEraseArea();
    qvCHIP_OtaStartWrite();

    imageProcessor->mDownloader->OnPreparedForDownload(CHIP_NO_ERROR);
}

void OTAImageProcessorImpl::HandleFinalize(intptr_t context)
{
    qvCHIP_OtaStatus_t status = qvCHIP_OtaStatusSuccess;
    auto * imageProcessor     = reinterpret_cast<OTAImageProcessorImpl *>(context);
    if (imageProcessor == nullptr)
    {
        return;
    }

    ChipLogProgress(SoftwareUpdate, "Q: HandleFinalize");

    // FIXME - Versions need to be filled in
    qvCHIP_OtaSetPendingImage(imageProcessor->mSwVer /*swVer*/, imageProcessor->mHwVer /*hwVer*/, qvCHIP_OtaGetAreaStartAddress(),
                              static_cast<std::uint32_t>(imageProcessor->mParams.downloadedBytes) /*imgSz*/);

    imageProcessor->ReleaseBlock();
}

void OTAImageProcessorImpl::HandleAbort(intptr_t context)
{
    auto * imageProcessor = reinterpret_cast<OTAImageProcessorImpl *>(context);
    if (imageProcessor == nullptr)
    {
        return;
    }

    // TODO: What do we do when we abort?
    ChipLogProgress(SoftwareUpdate, "Q: HandleAbort");

    remove(imageProcessor->mParams.imageFile.data());
    imageProcessor->ReleaseBlock();
}

void OTAImageProcessorImpl::HandleProcessBlock(intptr_t context)
{
    qvCHIP_OtaStatus_t status = qvCHIP_OtaStatusSuccess;
    auto * imageProcessor     = reinterpret_cast<OTAImageProcessorImpl *>(context);
    if (imageProcessor == nullptr)
    {
        ChipLogError(SoftwareUpdate, "ImageProcessor context is null");
        return;
    }
    else if (imageProcessor->mDownloader == nullptr)
    {
        ChipLogError(SoftwareUpdate, "mDownloader is null");
        return;
    }

    ChipLogProgress(SoftwareUpdate, "Q: HandleProcessBlock");
    // TODO: Process block header if any

    status = qvCHIP_OtaWriteChunk(qvCHIP_OtaGetAreaStartAddress() + imageProcessor->mParams.downloadedBytes,
                                  static_cast<std::uint16_t>(imageProcessor->mBlock.size()),
                                  reinterpret_cast<std::uint8_t *>(imageProcessor->mBlock.data()));

    if (status != qvCHIP_OtaStatusSuccess)
    {
        imageProcessor->mDownloader->EndDownload(CHIP_ERROR_WRITE_FAILED);
        return;
    }

    imageProcessor->mParams.downloadedBytes += imageProcessor->mBlock.size();
    imageProcessor->mDownloader->FetchNextData();
}

CHIP_ERROR OTAImageProcessorImpl::SetBlock(ByteSpan & block)
{
    if ((block.data() == nullptr) || block.empty())
    {
        return CHIP_NO_ERROR;
    }

    // Allocate memory for block data if it has not been done yet
    if (mBlock.empty())
    {
        mBlock = MutableByteSpan(static_cast<uint8_t *>(chip::Platform::MemoryAlloc(block.size())), block.size());
        if (mBlock.data() == nullptr)
        {
            return CHIP_ERROR_NO_MEMORY;
        }
    }

    // Store the actual block data
    CHIP_ERROR err = CopySpanToMutableSpan(block, mBlock);
    if (err != CHIP_NO_ERROR)
    {
        ChipLogError(SoftwareUpdate, "Cannot copy block data: %" CHIP_ERROR_FORMAT, err.Format());
        return err;
    }

    return CHIP_NO_ERROR;
}

CHIP_ERROR OTAImageProcessorImpl::ReleaseBlock()
{
    if (mBlock.data() != nullptr)
    {
        chip::Platform::MemoryFree(mBlock.data());
    }

    mBlock = MutableByteSpan();
    return CHIP_NO_ERROR;
}

} // namespace chip