Attachment.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_ATTACHMENT_H_
#define ALEXA_CLIENT_SDK_AVSCOMMON_AVS_INCLUDE_AVSCOMMON_AVS_ATTACHMENT_ATTACHMENT_H_

#include <atomic>
#include <mutex>
#include <string>

#include "AVSCommon/AVS/Attachment/AttachmentReader.h"
#include "AVSCommon/AVS/Attachment/AttachmentWriter.h"
#include "AVSCommon/Utils/SDS/InProcessSDS.h"
#include "AVSCommon/Utils/SDS/ReaderPolicy.h"
#include "AVSCommon/Utils/SDS/WriterPolicy.h"

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

class Attachment {
public:
    Attachment(const std::string& attachmentId);

    virtual ~Attachment() = default;

    virtual std::unique_ptr<AttachmentWriter> createWriter(
        utils::sds::WriterPolicy policy = utils::sds::WriterPolicy::ALL_OR_NOTHING) = 0;

    virtual std::unique_ptr<AttachmentReader> createReader(utils::sds::ReaderPolicy policy) = 0;

    std::string getId() const;

    bool hasCreatedReader();

    bool hasCreatedWriter();

protected:
    const std::string m_id;
    std::mutex m_mutex;
    std::atomic<bool> m_hasCreatedWriter;
    std::atomic<size_t> m_numReaders;
};

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

#endif  // ALEXA_CLIENT_SDK_AVSCOMMON_AVS_INCLUDE_AVSCOMMON_AVS_ATTACHMENT_ATTACHMENT_H_