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/*
* Copyright (C) 2016 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.incallui.legacyblocking;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.provider.CallLog;
import android.support.annotation.NonNull;
import com.android.dialer.common.AsyncTaskExecutor;
import com.android.dialer.common.AsyncTaskExecutors;
import com.android.dialer.common.LogUtil;
import java.util.Objects;
/**
* Observes the {@link CallLog} to delete the CallLog entry for a blocked call after it is added.
* Automatically de-registers itself {@link #TIMEOUT_MS} ms after registration or if the entry is
* found and deleted.
*/
public class BlockedNumberContentObserver extends ContentObserver
implements DeleteBlockedCallTask.Listener {
/**
* The time after which a {@link BlockedNumberContentObserver} will be automatically unregistered.
*/
public static final int TIMEOUT_MS = 5000;
@NonNull private final Context context;
@NonNull private final Handler handler;
private final String number;
private final long timeAddedMillis;
private final Runnable timeoutRunnable =
new Runnable() {
@Override
public void run() {
unregister();
}
};
private final AsyncTaskExecutor asyncTaskExecutor = AsyncTaskExecutors.createThreadPoolExecutor();
/**
* Creates the BlockedNumberContentObserver to delete the new {@link CallLog} entry from the given
* blocked number.
*
* @param number The blocked number.
* @param timeAddedMillis The time at which the call from the blocked number was placed.
*/
public BlockedNumberContentObserver(
@NonNull Context context, @NonNull Handler handler, String number, long timeAddedMillis) {
super(handler);
this.context = Objects.requireNonNull(context, "context").getApplicationContext();
this.handler = Objects.requireNonNull(handler);
this.number = number;
this.timeAddedMillis = timeAddedMillis;
}
@Override
public void onChange(boolean selfChange) {
LogUtil.i(
"BlockedNumberContentObserver.onChange",
"attempting to remove call log entry from blocked number");
asyncTaskExecutor.submit(
DeleteBlockedCallTask.IDENTIFIER,
new DeleteBlockedCallTask(context, this, number, timeAddedMillis));
}
@Override
public void onDeleteBlockedCallTaskComplete(boolean didFindEntry) {
if (didFindEntry) {
unregister();
}
}
/**
* Registers this {@link ContentObserver} to listen for changes to the {@link CallLog}. If the
* CallLog entry is not found before {@link #TIMEOUT_MS}, this ContentObserver automatically
* un-registers itself.
*/
public void register() {
LogUtil.i("BlockedNumberContentObserver.register", null);
context.getContentResolver().registerContentObserver(CallLog.CONTENT_URI, true, this);
handler.postDelayed(timeoutRunnable, TIMEOUT_MS);
}
private void unregister() {
LogUtil.i("BlockedNumberContentObserver.unregister", null);
handler.removeCallbacks(timeoutRunnable);
context.getContentResolver().unregisterContentObserver(this);
}
}
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