Migrate weave-related classes from proximity_auth/ble to cryptauth/ble.

components/proximity_auth/connection.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_PROXIMITY_AUTH_CONNECTION_H
-#define COMPONENTS_PROXIMITY_AUTH_CONNECTION_H
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/observer_list.h"
-#include "components/cryptauth/remote_device.h"
-
-namespace proximity_auth {
-
-class ConnectionObserver;
-class WireMessage;
-
-// Base class representing a connection with a remote device, which is a
-// persistent bidirectional channel for sending and receiving wire messages.
-class Connection {
- public:
-  enum Status {
-    DISCONNECTED,
-    IN_PROGRESS,
-    CONNECTED,
-  };
-
-  // Constructs a connection to the given |remote_device|.
-  explicit Connection(const cryptauth::RemoteDevice& remote_device);
-  virtual ~Connection();
-
-  // Returns true iff the connection's status is CONNECTED.
-  bool IsConnected() const;
-
-  // Returns true iff the connection is currently sending a message.
-  bool is_sending_message() const { return is_sending_message_; }
-
-  // Sends a message to the remote device.
-  // |OnSendCompleted()| will be called for all observers upon completion with
-  // either success or failure.
-  void SendMessage(std::unique_ptr<WireMessage> message);
-
-  void AddObserver(ConnectionObserver* observer);
-  void RemoveObserver(ConnectionObserver* observer);
-
-  const cryptauth::RemoteDevice& remote_device() const {
-    return remote_device_;
-  }
-
-  // Abstract methods that subclasses should implement:
-
-  // Attempts to connect to the remote device if not already connected.
-  virtual void Connect() = 0;
-
-  // Disconnects from the remote device.
-  virtual void Disconnect() = 0;
-
-  // The bluetooth address of the connected device.
-  virtual std::string GetDeviceAddress();
-
-  Status status() const { return status_; }
-
- protected:
-  // Sets the connection's status to |status|. If this is different from the
-  // previous status, notifies observers of the change in status.
-  // Virtual for testing.
-  virtual void SetStatus(Status status);
-
-  // Called after attempting to send bytes over the connection, whether the
-  // message was successfully sent or not.
-  // Virtual for testing.
-  virtual void OnDidSendMessage(const WireMessage& message, bool success);
-
-  // Called when bytes are read from the connection. There should not be a send
-  // in progress when this function is called.
-  // Virtual for testing.
-  virtual void OnBytesReceived(const std::string& bytes);
-
-  // Sends bytes over the connection. The implementing class should call
-  // OnDidSendMessage() once the send succeeds or fails. At most one send will
-  // be
-  // in progress.
-  virtual void SendMessageImpl(std::unique_ptr<WireMessage> message) = 0;
-
-  // Deserializes the |recieved_bytes_| and returns the resulting WireMessage,
-  // or NULL if the message is malformed. Sets |is_incomplete_message| to true
-  // if the |serialized_message| does not have enough data to parse the header,
-  // or if the message length encoded in the message header exceeds the size of
-  // the |serialized_message|. Exposed for testing.
-  virtual std::unique_ptr<WireMessage> DeserializeWireMessage(
-      bool* is_incomplete_message);
-
- private:
-  // The remote device corresponding to this connection.
-  const cryptauth::RemoteDevice remote_device_;
-
-  // The current status of the connection.
-  Status status_;
-
-  // The registered observers of the connection.
-  base::ObserverList<ConnectionObserver> observers_;
-
-  // A temporary buffer storing bytes received before a received message can be
-  // fully constructed.
-  std::string received_bytes_;
-
-  // Whether a message is currently in the process of being sent.
-  bool is_sending_message_;
-
-  DISALLOW_COPY_AND_ASSIGN(Connection);
-};
-
-}  // namespace proximity_auth
-
-#endif  // COMPONENTS_PROXIMITY_AUTH_CONNECTION_H