/*
 * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(MEDIA_STREAM)

#include "CaptureDevice.h"
#include "RealtimeMediaSource.h"

namespace WebCore {

class CaptureDeviceManager {
public:
    using CaptureDeviceChangedCallback = WTF::Function<void()>;
    using ObserverToken = uint32_t;
    virtual ObserverToken addCaptureDeviceChangedObserver(CaptureDeviceChangedCallback&&);
    virtual void removeCaptureDeviceChangedObserver(ObserverToken);

    virtual const Vector<CaptureDevice>& captureDevices() = 0;
    virtual std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType, const String&) { return std::nullopt; }

    virtual void refreshCaptureDevices() { }

protected:
    virtual ~CaptureDeviceManager();
    CaptureDevice captureDeviceFromPersistentID(const String& captureDeviceID);
    HashMap<ObserverToken, CaptureDeviceChangedCallback> m_observers;
};

} // namespace WebCore

#endif // ENABLE(MEDIA_STREAM)