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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 ASH_QUICK_PAIR_MESSAGE_STREAM_MESSAGE_STREAM_LOOKUP_H_
#define ASH_QUICK_PAIR_MESSAGE_STREAM_MESSAGE_STREAM_LOOKUP_H_
#include <string>
#include "base/observer_list_types.h"
namespace ash {
namespace quick_pair {
class MessageStream;
// Exposes a MessageStream instance to consumers for a specific device, if
// available. Observes the BluetoothAdapter for devices connected and
// disconnect and opens and closes RFCOMM channels to the device as
// appropriate, and creates and maintains MessageStream instances for each
// device.
class MessageStreamLookup {
public:
// For immediate consumption of MessageStream upon creation, use the
// observer model to retrieve the MessageStream when the socket connects.
class Observer : public base::CheckedObserver {
public:
virtual void OnMessageStreamConnected(const std::string& device_address,
MessageStream* message_stream) = 0;
};
virtual ~MessageStreamLookup() = default;
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// To retrieve an existing instance of a MessageStream, retrieve an instance
// this way.
virtual MessageStream* GetMessageStream(
const std::string& device_address) = 0;
};
} // namespace quick_pair
} // namespace ash
#endif // ASH_QUICK_PAIR_MESSAGE_STREAM_MESSAGE_STREAM_LOOKUP_H_
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