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/*
* 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.spam;
import android.content.SharedPreferences;
import android.support.annotation.Nullable;
import android.support.annotation.VisibleForTesting;
import com.android.dialer.DialerPhoneNumber;
import com.android.dialer.common.Assert;
import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor;
import com.android.dialer.common.concurrent.Annotations.LightweightExecutor;
import com.android.dialer.phonelookup.PhoneLookup;
import com.android.dialer.phonelookup.PhoneLookupInfo;
import com.android.dialer.phonelookup.PhoneLookupInfo.SpamInfo;
import com.android.dialer.spam.Spam;
import com.android.dialer.spam.SpamStatus;
import com.android.dialer.storage.Unencrypted;
import com.google.common.base.Optional;
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 java.util.Map.Entry;
import javax.inject.Inject;
/** PhoneLookup implementation for Spam info. */
public final class SpamPhoneLookup implements PhoneLookup<SpamInfo> {
@VisibleForTesting
static final String PREF_LAST_TIMESTAMP_PROCESSED = "spamPhoneLookupLastTimestampProcessed";
private final ListeningExecutorService lightweightExecutorService;
private final ListeningExecutorService backgroundExecutorService;
private final SharedPreferences sharedPreferences;
private final Spam spam;
@Nullable private Long currentLastTimestampProcessed;
@Inject
SpamPhoneLookup(
@BackgroundExecutor ListeningExecutorService backgroundExecutorService,
@LightweightExecutor ListeningExecutorService lightweightExecutorService,
@Unencrypted SharedPreferences sharedPreferences,
Spam spam) {
this.backgroundExecutorService = backgroundExecutorService;
this.lightweightExecutorService = lightweightExecutorService;
this.sharedPreferences = sharedPreferences;
this.spam = spam;
}
@Override
public ListenableFuture<SpamInfo> lookup(DialerPhoneNumber dialerPhoneNumber) {
return Futures.transform(
spam.batchCheckSpamStatus(ImmutableSet.of(dialerPhoneNumber)),
spamStatusMap ->
SpamInfo.newBuilder()
.setIsSpam(Assert.isNotNull(spamStatusMap.get(dialerPhoneNumber)).isSpam())
.build(),
lightweightExecutorService);
}
@Override
public ListenableFuture<Boolean> isDirty(ImmutableSet<DialerPhoneNumber> phoneNumbers) {
ListenableFuture<Long> lastTimestampProcessedFuture =
backgroundExecutorService.submit(
() -> sharedPreferences.getLong(PREF_LAST_TIMESTAMP_PROCESSED, 0L));
return Futures.transformAsync(
lastTimestampProcessedFuture, spam::dataUpdatedSince, lightweightExecutorService);
}
@Override
public ListenableFuture<ImmutableMap<DialerPhoneNumber, SpamInfo>> getMostRecentInfo(
ImmutableMap<DialerPhoneNumber, SpamInfo> existingInfoMap) {
currentLastTimestampProcessed = null;
ListenableFuture<ImmutableMap<DialerPhoneNumber, SpamStatus>> spamStatusMapFuture =
spam.batchCheckSpamStatus(existingInfoMap.keySet());
return Futures.transform(
spamStatusMapFuture,
spamStatusMap -> {
ImmutableMap.Builder<DialerPhoneNumber, SpamInfo> mostRecentSpamInfo =
new ImmutableMap.Builder<>();
for (Entry<DialerPhoneNumber, SpamStatus> dialerPhoneNumberAndSpamStatus :
spamStatusMap.entrySet()) {
DialerPhoneNumber dialerPhoneNumber = dialerPhoneNumberAndSpamStatus.getKey();
SpamStatus spamStatus = dialerPhoneNumberAndSpamStatus.getValue();
mostRecentSpamInfo.put(
dialerPhoneNumber, SpamInfo.newBuilder().setIsSpam(spamStatus.isSpam()).build());
Optional<Long> timestampMillis = spamStatus.getTimestampMillis();
if (timestampMillis.isPresent()) {
currentLastTimestampProcessed =
currentLastTimestampProcessed == null
? timestampMillis.get()
: Math.max(timestampMillis.get(), currentLastTimestampProcessed);
}
}
// If currentLastTimestampProcessed is null, it means none of the numbers in
// existingInfoMap has spam status in the underlying data source.
// We should set currentLastTimestampProcessed to the current timestamp to avoid
// triggering the bulk update flow repeatedly.
if (currentLastTimestampProcessed == null) {
currentLastTimestampProcessed = System.currentTimeMillis();
}
return mostRecentSpamInfo.build();
},
lightweightExecutorService);
}
@Override
public SpamInfo getSubMessage(PhoneLookupInfo phoneLookupInfo) {
return phoneLookupInfo.getSpamInfo();
}
@Override
public void setSubMessage(PhoneLookupInfo.Builder destination, SpamInfo subMessage) {
destination.setSpamInfo(subMessage);
}
@Override
public ListenableFuture<Void> onSuccessfulBulkUpdate() {
return backgroundExecutorService.submit(
() -> {
sharedPreferences
.edit()
.putLong(
PREF_LAST_TIMESTAMP_PROCESSED, Assert.isNotNull(currentLastTimestampProcessed))
.apply();
return null;
});
}
@Override
public void registerContentObservers() {
// No content observer can be registered as Spam is not based on a content provider.
// Each Spam implementation should be responsible for notifying any data changes.
}
@Override
public void unregisterContentObservers() {}
@Override
public ListenableFuture<Void> clearData() {
return backgroundExecutorService.submit(
() -> {
sharedPreferences.edit().remove(PREF_LAST_TIMESTAMP_PROCESSED).apply();
return null;
});
}
}
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