[CrOS Tether] Create TetherConnector, which attempts to connect to a nearby tether host.

chromeos/components/tether/tether_connector.h

Index: chromeos/components/tether/tether_connector.h
diff --git a/chromeos/components/tether/tether_connector.h b/chromeos/components/tether/tether_connector.h
new file mode 100644
index 0000000000000000000000000000000000000000..1282f16b66b170671b92ddb86037d29dbba2dd93
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+++ b/chromeos/components/tether/tether_connector.h
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+// Copyright 2016 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 CHROMEOS_COMPONENTS_TETHER_TETHER_CONNECTOR_H_
+#define CHROMEOS_COMPONENTS_TETHER_TETHER_CONNECTOR_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "chromeos/components/tether/connect_tethering_operation.h"
+#include "chromeos/network/network_connect.h"
+
+namespace chromeos {
+
+class NetworkStateHandler;
+
+namespace tether {
+
+class ActiveHost;
+class BleConnectionManager;
+class DeviceIdTetherNetworkGuidMap;
+class HostScanDevicePrioritizer;
+class TetherHostFetcher;
+class WifiHotspotConnector;
+
+// Connects to a tether network. When the user initiates a connection via the
+// UI, TetherConnector receives a callback from NetworkConnect and initiates a
+// connection by starting a ConnectTetheringOperation. When a response has been
+// received from the tether host, TetherConnector connects to the associated
+// Wi-Fi network.
+class TetherConnector : public NetworkConnect::TetherDelegate,
+                        public ConnectTetheringOperation::Observer {
+ public:
+  TetherConnector(
+      WifiHotspotConnector* wifi_hotspot_connector,
+      ActiveHost* active_host,
+      TetherHostFetcher* tether_host_fetcher,
+      BleConnectionManager* connection_manager,
+      HostScanDevicePrioritizer* host_scan_device_prioritizer,
+      DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map);
+  ~TetherConnector() override;
+
+  // NetworkConnect::TetherDelegate:
+  void ConnectToNetwork(const std::string& guid) override;
+
+  // ConnectTetheringOperation::Observer:
+  void OnSuccessfulConnectTetheringResponse(
+      const cryptauth::RemoteDevice& remote_device,
+      const std::string& ssid,
+      const std::string& password) override;
+  void OnConnectTetheringFailure(
+      const cryptauth::RemoteDevice& remote_device,
+      ConnectTetheringResponse_ResponseCode error_code) override;
+
+ private:
+  friend class TetherConnectorTest;
+
+  TetherConnector(
+      NetworkConnect* network_connect,
+      NetworkStateHandler* network_state_handler,
+      WifiHotspotConnector* wifi_hotspot_connector,
+      ActiveHost* active_host,
+      TetherHostFetcher* tether_host_fetcher,
+      BleConnectionManager* connection_manager,
+      HostScanDevicePrioritizer* host_scan_device_prioritizer,
+      DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map);
+
+  void SetDisconnected();
+  void SetConnected(const std::string& device_id,
+                    const std::string& wifi_network_guid);
+
+  void OnTetherHostToConnectFetched(
+      const std::string& device_id,
+      std::unique_ptr<cryptauth::RemoteDevice> tether_host_to_connect);
+  void OnWifiConnection(const std::string& device_id,
+                        const std::string& wifi_network_guid);
+
+  NetworkConnect* network_connect_;
+  NetworkStateHandler* network_state_handler_;
+  WifiHotspotConnector* wifi_hotspot_connector_;
+  ActiveHost* active_host_;
+  TetherHostFetcher* tether_host_fetcher_;
+  BleConnectionManager* connection_manager_;
+  HostScanDevicePrioritizer* host_scan_device_prioritizer_;
+  DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map_;
+
+  std::string device_id_pending_connection_;
+  std::unique_ptr<ConnectTetheringOperation> connect_tethering_operation_;
+  base::WeakPtrFactory<TetherConnector> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(TetherConnector);
+};
+
+}  // namespace tether
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_TETHER_TETHER_CONNECTOR_H_