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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_GLOBAL_MEDIA_CONTROLS_PUBLIC_MEDIA_ITEM_MANAGER_H_
#define COMPONENTS_GLOBAL_MEDIA_CONTROLS_PUBLIC_MEDIA_ITEM_MANAGER_H_
#include <list>
#include <memory>
#include <string>
#include "base/component_export.h"
#include "base/memory/weak_ptr.h"
namespace global_media_controls {
class MediaDialogDelegate;
class MediaItemManagerObserver;
class MediaItemProducer;
class COMPONENT_EXPORT(GLOBAL_MEDIA_CONTROLS) MediaItemManager {
public:
static std::unique_ptr<MediaItemManager> Create();
virtual ~MediaItemManager() = default;
virtual void AddObserver(MediaItemManagerObserver* observer) = 0;
virtual void RemoveObserver(MediaItemManagerObserver* observer) = 0;
// Adds a MediaItemProducer to the list of producers used by the
// MediaItemManager to compute the list of active media items.
virtual void AddItemProducer(MediaItemProducer* producer) = 0;
// Removes the MediaItemProducer that was added via |AddItemProducer()|.
virtual void RemoveItemProducer(MediaItemProducer* producer) = 0;
// The notification with the given id should be shown.
virtual void ShowItem(const std::string& id) = 0;
// The notification with the given id should be hidden.
virtual void HideItem(const std::string& id) = 0;
// The notification with the given id should be refreshed with new UI.
virtual void RefreshItem(const std::string& id) = 0;
// Called by item producers when items have changed.
virtual void OnItemsChanged() = 0;
// Populates a newly opened dialog with all active and controllable media
// items.
virtual void SetDialogDelegate(MediaDialogDelegate* delegate) = 0;
// Populates a newly opened dialog with only the given item.
virtual void SetDialogDelegateForId(MediaDialogDelegate* delegate,
const std::string& id) = 0;
// Changes focus to the dialog if it exists.
virtual void FocusDialog() = 0;
// Hides the open dialog if it exists. No-op otherwise.
virtual void HideDialog() = 0;
// True if there are active non-frozen items.
virtual bool HasActiveItems() = 0;
// True if there are active frozen items.
virtual bool HasFrozenItems() = 0;
// True if there is an open MediaDialogDelegate associated with this service.
virtual bool HasOpenDialog() = 0;
// Returns active media item IDs gathered from all the item producers and
// items being actively played will be in the front.
virtual std::list<std::string> GetActiveItemIds() = 0;
virtual base::WeakPtr<MediaItemManager> GetWeakPtr() = 0;
};
} // namespace global_media_controls
#endif // COMPONENTS_GLOBAL_MEDIA_CONTROLS_PUBLIC_MEDIA_ITEM_MANAGER_H_
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