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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_SECURE_CHANNEL_NEARBY_CONNECTION_BROKER_H_
#define CHROME_BROWSER_ASH_SECURE_CHANNEL_NEARBY_CONNECTION_BROKER_H_
#include <optional>
#include <string>
#include <vector>
#include "base/functional/callback.h"
#include "base/functional/callback_forward.h"
#include "chromeos/ash/services/secure_channel/public/mojom/nearby_connector.mojom-shared.h"
#include "chromeos/ash/services/secure_channel/public/mojom/nearby_connector.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace ash {
namespace secure_channel {
// Attempts to create a Nearby Connection to a remote device and exchange
// messages on behalf of the SecureChannel service. Implements the
// mojom::NearbyMessageSender interface so that SecureChannel can send messages
// to Nearby Connections, and uses the mojom::NearbyMessageReceiver interface to
// relay messages received from Nearby Connections back to SecureChannel.
//
// Also implements the mojom::NearbyFilePayloadHandler interface to register
// incoming file payloads with Nearby Connections.
//
// An instance of this class is only meant to be used for one connection
// request to a single device. To make a new request, create a new object.
class NearbyConnectionBroker : public mojom::NearbyMessageSender,
public mojom::NearbyFilePayloadHandler {
public:
~NearbyConnectionBroker() override;
protected:
NearbyConnectionBroker(
const std::vector<uint8_t>& bluetooth_public_address,
mojo::PendingReceiver<mojom::NearbyMessageSender> message_sender_receiver,
mojo::PendingReceiver<mojom::NearbyFilePayloadHandler>
file_payload_handler_receiver,
mojo::PendingRemote<mojom::NearbyMessageReceiver> message_receiver_remote,
mojo::PendingRemote<mojom::NearbyConnectionStateListener>
nearby_connection_state_listener_remote,
base::OnceClosure on_connected_callback,
base::OnceClosure on_disconnected_callback);
const std::vector<uint8_t>& bluetooth_public_address() const {
return bluetooth_public_address_;
}
// Can be overridden by derived classes to handle MessageSender,
// FilePayloadHandler, and MessageReceiver Mojo pipes being disconnected.
virtual void OnMojoDisconnection() {}
void InvokeDisconnectedCallback();
void NotifyConnected();
void NotifyMessageReceived(const std::string& received_message);
void NotifyConnectionStateChanged(mojom::NearbyConnectionStep step,
mojom::NearbyConnectionStepResult result);
private:
std::vector<uint8_t> bluetooth_public_address_;
mojo::Receiver<mojom::NearbyMessageSender> message_sender_receiver_;
mojo::Receiver<mojom::NearbyFilePayloadHandler>
file_payload_handler_receiver_;
mojo::Remote<mojom::NearbyMessageReceiver> message_receiver_remote_;
mojo::Remote<mojom::NearbyConnectionStateListener>
nearby_connection_state_listener_remote_;
base::OnceClosure on_connected_callback_;
base::OnceClosure on_disconnected_callback_;
};
} // namespace secure_channel
} // namespace ash
#endif // CHROME_BROWSER_ASH_SECURE_CHANNEL_NEARBY_CONNECTION_BROKER_H_
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