[CrOS Tether] Sort Tether network lists.

chromeos/components/tether/host_scan_device_prioritizer_impl.h

+// Copyright 2017 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_HOST_SCAN_DEVICE_PRIORITIZER_IMPL_H_
+#define CHROMEOS_COMPONENTS_TETHER_HOST_SCAN_DEVICE_PRIORITIZER_IMPL_H_
+
+#include "base/macros.h"
+#include "chromeos/components/tether/host_scan_device_prioritizer.h"
+#include "chromeos/network/network_state_handler.h"
+#include "components/cryptauth/remote_device.h"
+
+namespace chromeos {
+
+class NetworkStateHandler;
+
+namespace tether {
+
+class TetherHostResponseRecorder;
+class DeviceIdTetherNetworkGuidMap;
+
+// Implementation of HostScanDevicePrioritizer.
+class HostScanDevicePrioritizerImpl
+    : public HostScanDevicePrioritizer,
+      public NetworkStateHandler::TetherSortDelegate {
+ public:
+  HostScanDevicePrioritizerImpl(
+      TetherHostResponseRecorder* tether_host_response_recorder,
+      DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map);
+  ~HostScanDevicePrioritizerImpl() override;
+
+  // HostScanDevicePrioritizer:
+  void SortByHostScanOrder(
+      std::vector<cryptauth::RemoteDevice>* remote_devices) const override;
+
+  // NetworkStateHandler::TetherNetworkListSorter:
+  void SortTetherNetworkList(
+      NetworkStateHandler::ManagedStateList* tether_networks) const override;
+
+ private:
+  // Performs sorting for both SortByHostScanOrder() and
+  // SortTetherNetworkList().
+  template <typename T>
+  void SortNetworks(std::vector<T>* list_to_sort) const;
+
+  std::string GetDeviceId(const cryptauth::RemoteDevice& remote_device) const;
+  std::string GetDeviceId(
+      const std::unique_ptr<ManagedState>& tether_network_state) const;
+
+  TetherHostResponseRecorder* tether_host_response_recorder_;
+  DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(HostScanDevicePrioritizerImpl);
+};
+
+}  // namespace tether
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_TETHER_HOST_SCAN_DEVICE_PRIORITIZER_IMPL_H_