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// Copyright 2015 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_MEDIA_ROUTER_BROWSER_MEDIA_ROUTES_OBSERVER_H_
#define COMPONENTS_MEDIA_ROUTER_BROWSER_MEDIA_ROUTES_OBSERVER_H_
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/observer_list_types.h"
#include "components/media_router/common/media_route.h"
namespace media_router {
class MediaRouter;
// Base class for observing when the set of MediaRoutes and their associated
// MediaSinks have been updated. When an object is instantiated with a
// |source_id|, the observer expects that |routes| reported by
// |OnRoutesUpdated| that match the route IDs contained in the
// |joinable_route_ids| can be connected joined by the source. If no
// |source_id| is supplied, then the idea of joinable routes no longer applies.
class MediaRoutesObserver : public base::CheckedObserver {
public:
explicit MediaRoutesObserver(MediaRouter* router);
MediaRoutesObserver(const MediaRoutesObserver&) = delete;
MediaRoutesObserver& operator=(const MediaRoutesObserver&) = delete;
// NOTE: must be destroyed on the Browser UI thread to avoid threading issues
// with access.
~MediaRoutesObserver() override;
// Invoked when the list of routes and their associated sinks have been
// updated.
//
// Implementations may not perform operations that modify the Media Router's
// observer list. In particular, invoking this observer's destructor within
// OnRoutesUpdated will result in undefined behavior.
virtual void OnRoutesUpdated(const std::vector<MediaRoute>& routes) {}
MediaRouter* router() const { return router_; }
private:
const raw_ptr<MediaRouter> router_;
};
} // namespace media_router
#endif // COMPONENTS_MEDIA_ROUTER_BROWSER_MEDIA_ROUTES_OBSERVER_H_
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