InternetConnectionMonitor.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_UTILS_INCLUDE_AVSCOMMON_UTILS_NETWORK_INTERNETCONNECTIONMONITOR_H_
#define ALEXA_CLIENT_SDK_AVSCOMMON_UTILS_INCLUDE_AVSCOMMON_UTILS_NETWORK_INTERNETCONNECTIONMONITOR_H_

#include <chrono>
#include <memory>
#include <mutex>
#include <unordered_set>

#include <AVSCommon/AVS/Attachment/InProcessAttachment.h>
#include <AVSCommon/AVS/Attachment/InProcessAttachmentReader.h>
#include <AVSCommon/SDKInterfaces/HTTPContentFetcherInterfaceFactoryInterface.h>
#include <AVSCommon/SDKInterfaces/InternetConnectionMonitorInterface.h>
#include <AVSCommon/SDKInterfaces/InternetConnectionObserverInterface.h>
#include <AVSCommon/Utils/Timing/Timer.h>

namespace alexaClientSDK {
namespace avsCommon {
namespace utils {
namespace network {

class InternetConnectionMonitor : public sdkInterfaces::InternetConnectionMonitorInterface {
public:
    static std::shared_ptr<sdkInterfaces::InternetConnectionMonitorInterface> createInternetConnectionMonitorInterface(
        const std::shared_ptr<sdkInterfaces::HTTPContentFetcherInterfaceFactoryInterface>& contentFetcherFactory);

    static std::unique_ptr<InternetConnectionMonitor> create(
        std::shared_ptr<sdkInterfaces::HTTPContentFetcherInterfaceFactoryInterface> contentFetcherFactory);

    virtual ~InternetConnectionMonitor();

    void addInternetConnectionObserver(
        std::shared_ptr<avsCommon::sdkInterfaces::InternetConnectionObserverInterface> observer) override;
    void removeInternetConnectionObserver(
        std::shared_ptr<avsCommon::sdkInterfaces::InternetConnectionObserverInterface> observer) override;

private:
    InternetConnectionMonitor(
        std::shared_ptr<sdkInterfaces::HTTPContentFetcherInterfaceFactoryInterface> contentFetcherFactory);

    void startMonitoring();

    void stopMonitoring();

    void testConnection();

    void updateConnectionStatus(bool connected);

    std::unordered_set<std::shared_ptr<sdkInterfaces::InternetConnectionObserverInterface>> m_observers;

    bool m_connected;

    std::chrono::seconds m_period;

    avsCommon::utils::timing::Timer m_connectionTestTimer;

    std::atomic<bool> m_isShuttingDown;

    std::shared_ptr<avsCommon::sdkInterfaces::HTTPContentFetcherInterfaceFactoryInterface> m_contentFetcherFactory;

    std::mutex m_mutex;
};

}  // namespace network
}  // namespace utils
}  // namespace avsCommon
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_AVSCOMMON_UTILS_INCLUDE_AVSCOMMON_UTILS_NETWORK_INTERNETCONNECTIONMONITOR_H_