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/**
* Copyright (C) 2015 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.server.fingerprint;
import android.content.Context;
import android.hardware.fingerprint.Fingerprint;
import android.os.Vibrator;
import android.text.TextUtils;
import android.util.SparseArray;
import com.android.internal.annotations.GuardedBy;
import java.util.List;
/**
* Utility class for dealing with fingerprints and fingerprint settings.
*/
public class FingerprintUtils {
private static final long[] FP_ERROR_VIBRATE_PATTERN = new long[] {0, 30, 100, 30};
private static final long[] FP_SUCCESS_VIBRATE_PATTERN = new long[] {0, 30};
private static final Object sInstanceLock = new Object();
private static FingerprintUtils sInstance;
@GuardedBy("this")
private final SparseArray<FingerprintsUserState> mUsers = new SparseArray<>();
public static FingerprintUtils getInstance() {
synchronized (sInstanceLock) {
if (sInstance == null) {
sInstance = new FingerprintUtils();
}
}
return sInstance;
}
private FingerprintUtils() {
}
public List<Fingerprint> getFingerprintsForUser(Context ctx, int userId) {
return getStateForUser(ctx, userId).getFingerprints();
}
public void addFingerprintForUser(Context ctx, int fingerId, int userId) {
getStateForUser(ctx, userId).addFingerprint(fingerId, userId);
}
public void removeFingerprintIdForUser(Context ctx, int fingerId, int userId) {
getStateForUser(ctx, userId).removeFingerprint(fingerId);
}
public void renameFingerprintForUser(Context ctx, int fingerId, int userId, CharSequence name) {
if (TextUtils.isEmpty(name)) {
// Don't do the rename if it's empty
return;
}
getStateForUser(ctx, userId).renameFingerprint(fingerId, name);
}
public static void vibrateFingerprintError(Context context) {
Vibrator vibrator = context.getSystemService(Vibrator.class);
if (vibrator != null) {
vibrator.vibrate(FP_ERROR_VIBRATE_PATTERN, -1);
}
}
public static void vibrateFingerprintSuccess(Context context) {
Vibrator vibrator = context.getSystemService(Vibrator.class);
if (vibrator != null) {
vibrator.vibrate(FP_SUCCESS_VIBRATE_PATTERN, -1);
}
}
private FingerprintsUserState getStateForUser(Context ctx, int userId) {
synchronized (this) {
FingerprintsUserState state = mUsers.get(userId);
if (state == null) {
state = new FingerprintsUserState(ctx, userId);
mUsers.put(userId, state);
}
return state;
}
}
}
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