1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.imsserviceentitlement.fcm; 18 19 import static java.util.concurrent.TimeUnit.SECONDS; 20 21 import android.content.Context; 22 import android.content.SharedPreferences; 23 import android.util.Log; 24 25 import androidx.annotation.WorkerThread; 26 27 import java.util.concurrent.CountDownLatch; 28 29 /** Convenience methods for FCM. */ 30 public final class FcmUtils { 31 public static final String LOG_TAG = "IMSSE-FcmUtils"; 32 33 private static final long TOKEN_UPDATE_WAITING_SECONDS = 25L; 34 FcmUtils()35 private FcmUtils() {} 36 37 /** Fetches FCM token, if it's not available via {@link FcmTokenStore#getToken}. */ 38 @WorkerThread fetchFcmToken(Context context, int subId)39 public static void fetchFcmToken(Context context, int subId) { 40 if (FcmTokenStore.hasToken(context, subId)) { 41 Log.d(LOG_TAG, "FCM token available."); 42 return; 43 } 44 45 Log.d(LOG_TAG, "FCM token unavailable. Try to update..."); 46 final CountDownLatch tokenUpdated = new CountDownLatch(1); 47 final SharedPreferences.OnSharedPreferenceChangeListener listener = 48 (s, k) -> { 49 Log.d(LOG_TAG, "FCM preference changed."); 50 if (FcmTokenStore.hasToken(context, subId)) { 51 tokenUpdated.countDown(); 52 } 53 }; 54 FcmTokenStore.registerTokenUpdateListener(context, listener); 55 56 // Starts a JobIntentService to update FCM token by calling FCM API on a worker thread. 57 FcmRegistrationService.enqueueJob(context); 58 59 try { 60 // Wait for 25s. If FCM token update failed/timeout, we will let user see 61 // the error message returned by server. Then user can manually retry. 62 if (tokenUpdated.await(TOKEN_UPDATE_WAITING_SECONDS, SECONDS)) { 63 Log.d(LOG_TAG, "FCM token updated."); 64 } else { 65 Log.d(LOG_TAG, "FCM token update failed."); 66 } 67 } catch (InterruptedException e) { 68 // Do nothing 69 Log.d(LOG_TAG, "FCM token update interrupted."); 70 } 71 FcmTokenStore.unregisterTokenUpdateListener(context, listener); 72 } 73 } 74