From 56e4c3da2566c37f13737c950e2c5234507dc6db Mon Sep 17 00:00:00 2001
From: Kevin Chyn <kchyn@google.com>
Date: Tue, 23 Apr 2019 11:28:43 -0700
Subject: [PATCH] Post a notification when ACQUIRED_RECALIBRATE is received

Fixes: 130898604

Test: Builds

Change-Id: Ic157f124d8c92a2a79294dffaacdb0c2e40f03e5
---
 core/res/res/values/strings.xml               |  7 +++
 core/res/res/values/symbols.xml               |  3 ++
 .../server/biometrics/face/FaceService.java   | 50 ++++++++++++++++++-
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index 4bd2cc758cbb5..ef834aa01a360 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -1507,6 +1507,13 @@
     <!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. [CHAR LIMIT=90] -->
     <string name="permdesc_useFaceAuthentication">Allows the app to use face authentication hardware for authentication</string>
 
+    <!-- Notification name shown when the system requires the user to re-enroll their face. [CHAR LIMIT=NONE] -->
+    <string name="face_recalibrate_notification_name">Face Authentication</string>
+    <!-- Notification title shown when the system requires the user to re-enroll their face. [CHAR LIMIT=NONE] -->
+    <string name="face_recalibrate_notification_title">Re-enroll your face</string>
+    <!-- Notification content shown when the system requires the user to re-enroll their face. [CHAR LIMIT=NONE] -->
+    <string name="face_recalibrate_notification_content">To improve recognition, please re-enroll your face</string>
+
     <!-- Message shown during face acquisition when the face cannot be recognized [CHAR LIMIT=50] -->
     <string name="face_acquired_insufficient">Couldn\u2019t capture accurate face data. Try again.</string>
     <!-- Message shown during face acquisition when the image is too bright [CHAR LIMIT=50] -->
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 2f34c943bdfa7..e19e08c4b5a96 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2530,6 +2530,9 @@
   <java-symbol type="bool" name="config_fingerprintSupportsGestures"/>
 
   <!-- Face authentication messages -->
+  <java-symbol type="string" name="face_recalibrate_notification_name" />
+  <java-symbol type="string" name="face_recalibrate_notification_title" />
+  <java-symbol type="string" name="face_recalibrate_notification_content" />
   <java-symbol type="string" name="face_error_unable_to_process" />
   <java-symbol type="string" name="face_error_hw_not_available" />
   <java-symbol type="string" name="face_error_no_space" />
diff --git a/services/core/java/com/android/server/biometrics/face/FaceService.java b/services/core/java/com/android/server/biometrics/face/FaceService.java
index e218c6b399a21..44fd84602ebe1 100644
--- a/services/core/java/com/android/server/biometrics/face/FaceService.java
+++ b/services/core/java/com/android/server/biometrics/face/FaceService.java
@@ -23,7 +23,12 @@ import static android.Manifest.permission.USE_BIOMETRIC_INTERNAL;
 
 import android.app.ActivityManager;
 import android.app.AppOpsManager;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.UserInfo;
 import android.hardware.biometrics.BiometricAuthenticator;
 import android.hardware.biometrics.BiometricConstants;
@@ -48,10 +53,10 @@ import android.os.SELinux;
 import android.os.SystemProperties;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.provider.Settings;
 import android.util.Slog;
 import android.util.proto.ProtoOutputStream;
 
+import com.android.internal.R;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.logging.MetricsLogger;
 import com.android.internal.util.DumpUtils;
@@ -124,6 +129,49 @@ public class FaceService extends BiometricServiceBase {
             // but let's leave it as-is for now.
             return result || !authenticated;
         }
+
+        @Override
+        public boolean onAcquired(int acquireInfo, int vendorCode) {
+
+            if (acquireInfo == FaceManager.FACE_ACQUIRED_RECALIBRATE) {
+                final String name =
+                        getContext().getString(R.string.face_recalibrate_notification_name);
+                final String title =
+                        getContext().getString(R.string.face_recalibrate_notification_title);
+                final String content =
+                        getContext().getString(R.string.face_recalibrate_notification_content);
+
+                final Intent intent = new Intent("android.settings.FACE_SETTINGS");
+                intent.setPackage("com.android.settings");
+
+                final PendingIntent pendingIntent = PendingIntent.getActivityAsUser(getContext(),
+                        0 /* requestCode */, intent, 0 /* flags */, null /* options */,
+                        UserHandle.CURRENT);
+
+                final String id = "FaceService";
+
+                NotificationManager nm =
+                        getContext().getSystemService(NotificationManager.class);
+                NotificationChannel channel = new NotificationChannel(id, name,
+                        NotificationManager.IMPORTANCE_HIGH);
+                Notification notification = new Notification.Builder(getContext(), id)
+                        .setSmallIcon(R.drawable.ic_lock)
+                        .setContentTitle(title)
+                        .setContentText(content)
+                        .setSubText(name)
+                        .setOnlyAlertOnce(true)
+                        .setLocalOnly(true)
+                        .setAutoCancel(true)
+                        .setCategory(Notification.CATEGORY_SYSTEM)
+                        .setContentIntent(pendingIntent)
+                        .build();
+
+                nm.createNotificationChannel(channel);
+                nm.notifyAsUser(null /* tag */, 0 /* id */, notification, UserHandle.CURRENT);
+            }
+
+            return super.onAcquired(acquireInfo, vendorCode);
+        }
     }
 
     /**