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/combination/CombinedBiometricStatusUtils.java

@@ -0,0 +1,122 @@
+/*
+ * 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.combination;
+
+import android.content.Context;
+import android.hardware.biometrics.BiometricAuthenticator;
+import android.hardware.face.FaceManager;
+import android.hardware.fingerprint.FingerprintManager;
+import android.os.UserHandle;
+
+import androidx.annotation.Nullable;
+
+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 combined biometric details shared between Security Settings and Safety Center.
+ */
+public class CombinedBiometricStatusUtils {
+
+    private final int mUserId = UserHandle.myUserId();
+    private final Context mContext;
+    @Nullable
+    FingerprintManager mFingerprintManager;
+    @Nullable
+    FaceManager mFaceManager;
+
+    public CombinedBiometricStatusUtils(Context context) {
+        mContext = context;
+        mFingerprintManager = Utils.getFingerprintManagerOrNull(context);
+        mFaceManager = Utils.getFaceManagerOrNull(context);
+    }
+
+    /**
+     * Returns whether the combined biometric settings entity should be shown.
+     */
+    public boolean isAvailable() {
+        return Utils.hasFingerprintHardware(mContext) && Utils.hasFaceHardware(mContext);
+    }
+
+    /**
+     * Returns the {@link EnforcedAdmin} in case parental consent is required to change both
+     * face and fingerprint settings.
+     *
+     * @return null if either face or fingerprint settings do not require a parental consent.
+     */
+    public EnforcedAdmin getDisablingAdmin() {
+        // This controller currently is shown if fingerprint&face exist on the device. If this
+        // changes in the future, the modalities passed into the below will need to be updated.
+
+        final EnforcedAdmin faceAdmin = ParentalControlsUtils
+                .parentConsentRequired(mContext, BiometricAuthenticator.TYPE_FACE);
+        final EnforcedAdmin fpAdmin = ParentalControlsUtils
+                .parentConsentRequired(mContext, BiometricAuthenticator.TYPE_FINGERPRINT);
+
+        final boolean faceConsentRequired = faceAdmin != null;
+        final boolean fpConsentRequired = fpAdmin != null;
+
+        // Result is only required if all modalities require consent.
+        // If the admins are non-null, they are actually always the same.
+        return faceConsentRequired && fpConsentRequired ? faceAdmin : null;
+    }
+
+    /**
+     * Returns the summary of combined biometric settings entity.
+     */
+    public String getSummary() {
+        final int numFingerprintsEnrolled = mFingerprintManager != null
+                ? mFingerprintManager.getEnrolledFingerprints(mUserId).size() : 0;
+        final boolean faceEnrolled = mFaceManager != null
+                && mFaceManager.hasEnrolledTemplates(mUserId);
+
+        if (faceEnrolled && numFingerprintsEnrolled > 1) {
+            return mContext.getString(
+                    R.string.security_settings_biometric_preference_summary_both_fp_multiple);
+        } else if (faceEnrolled && numFingerprintsEnrolled == 1) {
+            return mContext.getString(
+                    R.string.security_settings_biometric_preference_summary_both_fp_single);
+        } else if (faceEnrolled) {
+            return mContext.getString(R.string.security_settings_face_preference_summary);
+        } else if (numFingerprintsEnrolled > 0) {
+            return mContext.getResources().getQuantityString(
+                    R.plurals.security_settings_fingerprint_preference_summary,
+                    numFingerprintsEnrolled, numFingerprintsEnrolled);
+        } else {
+            return mContext.getString(
+                    R.string.security_settings_biometric_preference_summary_none_enrolled);
+        }
+    }
+
+    /**
+     * Returns the class name of the Settings page corresponding to combined biometric settings.
+     */
+    public String getSettingsClassName() {
+        return Settings.CombinedBiometricSettingsActivity.class.getName();
+    }
+
+    /**
+     * Returns the class name of the Settings page corresponding to combined biometric settings
+     * for work profile.
+     */
+    public String getProfileSettingsClassName() {
+        return Settings.CombinedBiometricProfileSettingsActivity.class.getName();
+    }
+}