InProcessAttachmentReader.h

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/*
 * Copyright Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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.
 */

#ifndef ALEXA_CLIENT_SDK_AVSCOMMON_AVS_INCLUDE_AVSCOMMON_AVS_ATTACHMENT_INPROCESSATTACHMENTREADER_H_
#define ALEXA_CLIENT_SDK_AVSCOMMON_AVS_INCLUDE_AVSCOMMON_AVS_ATTACHMENT_INPROCESSATTACHMENTREADER_H_

#include "AVSCommon/Utils/SDS/InProcessSDS.h"
#include "AVSCommon/Utils/SDS/Reader.h"

#include "AttachmentReader.h"

namespace alexaClientSDK {
namespace avsCommon {
namespace avs {
namespace attachment {

class InProcessAttachmentReader : public AttachmentReader {
public:
    using SDSType = avsCommon::utils::sds::InProcessSDS;
    using SDSTypeIndex = avsCommon::utils::sds::InProcessSDS::Index;
    using SDSTypeReader = SDSType::Reader;

    static std::unique_ptr<InProcessAttachmentReader> create(
        SDSTypeReader::Policy policy,
        std::shared_ptr<SDSType> sds,
        SDSTypeIndex offset = 0,
        SDSTypeReader::Reference reference = SDSTypeReader::Reference::ABSOLUTE,
        bool resetOnOverrun = false);

    ~InProcessAttachmentReader() = default;

    std::size_t read(
        void* buf,
        std::size_t numBytes,
        ReadStatus* readStatus,
        std::chrono::milliseconds timeoutMs = std::chrono::milliseconds(0)) override;

    void close(ClosePoint closePoint = ClosePoint::AFTER_DRAINING_CURRENT_BUFFER) override;

    bool seek(uint64_t offset) override;

    uint64_t getNumUnreadBytes() override;

private:
    explicit InProcessAttachmentReader(std::unique_ptr<AttachmentReader> delegate);

    // Delegate reader
    std::unique_ptr<AttachmentReader> m_delegate;
};

}  // namespace attachment
}  // namespace avs
}  // namespace avsCommon
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_AVSCOMMON_AVS_INCLUDE_AVSCOMMON_AVS_ATTACHMENT_INPROCESSATTACHMENTREADER_H_