HostScanner: Add scanned hosts to NetworkStateHandler and NotificationPresenter.

chromeos/components/tether/host_scanner.cc

Index: chromeos/components/tether/host_scanner.cc
diff --git a/chromeos/components/tether/host_scanner.cc b/chromeos/components/tether/host_scanner.cc
index 7296d8471e40a6c5c646736b973cf6ff3a5c5d20..e74407454e4f667e68e155838ecd6926e7b86104 100644
--- a/chromeos/components/tether/host_scanner.cc
+++ b/chromeos/components/tether/host_scanner.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "chromeos/components/tether/tether_host_fetcher.h"
+#include "chromeos/network/network_state.h"
 #include "components/cryptauth/remote_device_loader.h"
 
 namespace chromeos {
@@ -15,10 +16,14 @@ namespace tether {
 HostScanner::HostScanner(
     TetherHostFetcher* tether_host_fetcher,
     BleConnectionManager* connection_manager,
-    HostScanDevicePrioritizer* host_scan_device_prioritizer)
+    HostScanDevicePrioritizer* host_scan_device_prioritizer,
+    NetworkStateHandler* network_state_handler,
+    NotificationPresenter* notification_presenter)
     : tether_host_fetcher_(tether_host_fetcher),
       connection_manager_(connection_manager),
       host_scan_device_prioritizer_(host_scan_device_prioritizer),
+      network_state_handler_(network_state_handler),
+      notification_presenter_(notification_presenter),
       is_fetching_hosts_(false),
       weak_ptr_factory_(this) {}
 
@@ -60,7 +65,23 @@ void HostScanner::OnTetherAvailabilityResponse(
     bool is_final_scan_result) {
   most_recent_scan_results_ = scanned_device_list_so_far;
 
-  // TODO(hansberry): Hook up to networking code.
+  if (!scanned_device_list_so_far.empty()) {
+    // TODO (hansberry): Clear out old scanned hosts from NetworkStateHandler.
+    // TODO (hansberry): Add battery and cell strength properties once
+    // available.
+    for (auto& scanned_device_info : scanned_device_list_so_far) {
+      cryptauth::RemoteDevice remote_device = scanned_device_info.remote_device;
+      network_state_handler_->AddTetherNetworkState(remote_device.GetDeviceId(),
+                                                    remote_device.name);
+    }
+
+    if (scanned_device_list_so_far.size() == 1) {
+      notification_presenter_->NotifyPotentialHotspotNearby(
+          scanned_device_list_so_far.at(0).remote_device);
+    } else {
+      notification_presenter_->NotifyMultiplePotentialHotspotsNearby();
+    }
+  }
 
   if (is_final_scan_result) {
     // If the final scan result has been received, the operation is finished.