PostConnectSequencer.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_ACL_INCLUDE_ACL_TRANSPORT_POSTCONNECTSEQUENCER_H_
#define ALEXA_CLIENT_SDK_ACL_INCLUDE_ACL_TRANSPORT_POSTCONNECTSEQUENCER_H_

#include <memory>
#include <mutex>
#include <set>
#include <thread>

#include <AVSCommon/SDKInterfaces/PostConnectOperationInterface.h>
#include <AVSCommon/SDKInterfaces/MessageRequestObserverInterface.h>
#include <AVSCommon/Utils/Power/PowerResource.h>
#include <AVSCommon/Utils/RequiresShutdown.h>

#include "ACL/Transport/PostConnectInterface.h"
#include "ACL/Transport/TransportObserverInterface.h"

namespace alexaClientSDK {
namespace acl {

struct PostConnectOperationPriorityCompare {
    bool operator()(
        const std::shared_ptr<avsCommon::sdkInterfaces::PostConnectOperationInterface>& first,
        const std::shared_ptr<avsCommon::sdkInterfaces::PostConnectOperationInterface>& second) const {
        return first->getOperationPriority() < second->getOperationPriority();
    }
};

class PostConnectSequencer : public PostConnectInterface {
public:
    using PostConnectOperationsSet = std::set<
        std::shared_ptr<avsCommon::sdkInterfaces::PostConnectOperationInterface>,
        PostConnectOperationPriorityCompare>;
    static std::shared_ptr<PostConnectSequencer> create(const PostConnectOperationsSet& postConnectOperations);

    ~PostConnectSequencer() override;

    bool doPostConnect(
        std::shared_ptr<avsCommon::sdkInterfaces::MessageSenderInterface> postConnectSender,
        std::shared_ptr<PostConnectObserverInterface> postConnectObserver) override;
    void onDisconnect() override;
private:
    PostConnectSequencer(const PostConnectOperationsSet& postConnectOperations);

    void mainLoop(
        std::shared_ptr<avsCommon::sdkInterfaces::MessageSenderInterface> postConnectSender,
        std::shared_ptr<PostConnectObserverInterface> postConnectObserver);

    void stop();

    void resetCurrentOperation();

    bool isStopping();

    std::mutex m_mutex;

    std::shared_ptr<avsCommon::sdkInterfaces::PostConnectOperationInterface> m_currentPostConnectOperation;

    bool m_isStopping;

    PostConnectOperationsSet m_postConnectOperations;

    std::mutex m_mainLoopThreadMutex;

    std::thread m_mainLoopThread;

    std::shared_ptr<avsCommon::utils::power::PowerResource> m_mainLoopPowerResource;
};

}  // namespace acl
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_ACL_INCLUDE_ACL_TRANSPORT_POSTCONNECTSEQUENCER_H_