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Diffstat (limited to 'java/com/android/dialer/phonelookup/emergency/EmergencyPhoneLookup.java')
-rw-r--r-- | java/com/android/dialer/phonelookup/emergency/EmergencyPhoneLookup.java | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/java/com/android/dialer/phonelookup/emergency/EmergencyPhoneLookup.java b/java/com/android/dialer/phonelookup/emergency/EmergencyPhoneLookup.java new file mode 100644 index 000000000..3f675d35f --- /dev/null +++ b/java/com/android/dialer/phonelookup/emergency/EmergencyPhoneLookup.java @@ -0,0 +1,117 @@ +/* + * Copyright (C) 2018 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.dialer.phonelookup.emergency; + +import android.content.Context; +import com.android.dialer.DialerPhoneNumber; +import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor; +import com.android.dialer.inject.ApplicationContext; +import com.android.dialer.phonelookup.PhoneLookup; +import com.android.dialer.phonelookup.PhoneLookupInfo; +import com.android.dialer.phonelookup.PhoneLookupInfo.EmergencyInfo; +import com.android.dialer.phonenumberutil.PhoneNumberHelper; +import com.google.common.collect.ImmutableMap; +import com.google.common.collect.ImmutableSet; +import com.google.common.util.concurrent.Futures; +import com.google.common.util.concurrent.ListenableFuture; +import com.google.common.util.concurrent.ListeningExecutorService; +import javax.inject.Inject; + +/** + * PhoneLookup implementation for checking if a number is an emergency number. + * + * <p>The check has to be done in a PhoneLookup as it involves detecting the user's location and + * obtaining SIM info, which are expensive operations. Doing it in the main thread will make the UI + * super janky. + */ +public class EmergencyPhoneLookup implements PhoneLookup<EmergencyInfo> { + + private final Context appContext; + private final ListeningExecutorService backgroundExecutorService; + + @Inject + EmergencyPhoneLookup( + @ApplicationContext Context appContext, + @BackgroundExecutor ListeningExecutorService backgroundExecutorService) { + this.appContext = appContext; + this.backgroundExecutorService = backgroundExecutorService; + } + + @Override + public ListenableFuture<EmergencyInfo> lookup(DialerPhoneNumber dialerPhoneNumber) { + return backgroundExecutorService.submit( + () -> + EmergencyInfo.newBuilder() + .setIsEmergencyNumber( + PhoneNumberHelper.isLocalEmergencyNumber( + appContext, dialerPhoneNumber.getNormalizedNumber())) + .build()); + } + + @Override + public ListenableFuture<Boolean> isDirty(ImmutableSet<DialerPhoneNumber> phoneNumbers) { + return Futures.immediateFuture(false); + } + + @Override + public ListenableFuture<ImmutableMap<DialerPhoneNumber, EmergencyInfo>> getMostRecentInfo( + ImmutableMap<DialerPhoneNumber, EmergencyInfo> existingInfoMap) { + // We can update EmergencyInfo for all numbers in the provided map, but the negative impact on + // performance is intolerable as checking a single number involves detecting the user's location + // and obtaining SIM info, which will take more than 100ms (see + // android.telephony.PhoneNumberUtils#isLocalEmergencyNumber(Context, int, String) for details). + // + // As emergency numbers won't change in a country, the only case we will miss is that + // (1) a number is an emergency number in country A but not in country B, + // (2) a user has an emergency call entry when they are in country A, and + // (3) they travel from A to B, + // which is a rare event. + // + // We can update the implementation if telecom supports batch check in the future. + return Futures.immediateFuture(existingInfoMap); + } + + @Override + public void setSubMessage(PhoneLookupInfo.Builder destination, EmergencyInfo subMessage) { + destination.setEmergencyInfo(subMessage); + } + + @Override + public EmergencyInfo getSubMessage(PhoneLookupInfo phoneLookupInfo) { + return phoneLookupInfo.getEmergencyInfo(); + } + + @Override + public ListenableFuture<Void> onSuccessfulBulkUpdate() { + return Futures.immediateFuture(null); + } + + @Override + public void registerContentObservers() { + // No content observer to register. + } + + @Override + public void unregisterContentObservers() { + // Nothing to be done as no content observer is registered. + } + + @Override + public ListenableFuture<Void> clearData() { + return Futures.immediateFuture(null); + } +} |