Move all the shared data from biometric controllers to separate utility classes

Test: atest SettingsUnitTests

Bug: 215517420
Change-Id: Ic5421cd910ae77d4e7c0a29ae0337edb98a1d3b9

src/com/android/settings/biometrics/face/FaceStatusUtils.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+import android.hardware.biometrics.BiometricAuthenticator;
+import android.hardware.face.FaceManager;
+import android.os.UserHandle;
+
+import com.android.settings.R;
+import com.android.settings.Settings;
+import com.android.settings.Utils;
+import com.android.settings.biometrics.ParentalControlsUtils;
+import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+
+/**
+ * Utilities for face details shared between Security Settings and Safety Center.
+ */
+public class FaceStatusUtils {
+
+    private final int mUserId = UserHandle.myUserId();
+    private final Context mContext;
+    private final FaceManager mFaceManager;
+
+    public FaceStatusUtils(Context context, FaceManager faceManager) {
+        mContext = context;
+        mFaceManager = faceManager;
+    }
+
+    /**
+     * Returns whether the face settings entity should be shown.
+     */
+    public boolean isAvailable() {
+        return !Utils.isMultipleBiometricsSupported(mContext) && Utils.hasFaceHardware(mContext);
+    }
+
+    /**
+     * Returns the {@link EnforcedAdmin} if parental consent is required to change face settings.
+     *
+     * @return null if face settings does not require a parental consent.
+     */
+    public EnforcedAdmin getDisablingAdmin() {
+        return ParentalControlsUtils.parentConsentRequired(
+                mContext, BiometricAuthenticator.TYPE_FACE);
+    }
+
+    /**
+     * Returns the summary of face settings entity.
+     */
+    public String getSummary() {
+        return mContext.getResources().getString(hasEnrolled()
+                ? R.string.security_settings_face_preference_summary
+                : R.string.security_settings_face_preference_summary_none);
+    }
+
+    /**
+     * Returns the class name of the Settings page corresponding to face settings.
+     */
+    public String getSettingsClassName() {
+        return hasEnrolled() ? Settings.FaceSettingsActivity.class.getName()
+                : FaceEnrollIntroduction.class.getName();
+    }
+
+    private boolean hasEnrolled() {
+        return mFaceManager.hasEnrolledTemplates(mUserId);
+    }
+}