1 /* 2 * Copyright (C) 2016 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.server.telecom.callfiltering; 18 19 import android.content.Context; 20 import android.os.Handler; 21 import android.os.Looper; 22 import android.telecom.Log; 23 import android.telecom.Logging.Runnable; 24 25 import com.android.internal.annotations.VisibleForTesting; 26 import com.android.server.telecom.Call; 27 import com.android.server.telecom.LogUtils; 28 import com.android.server.telecom.TelecomSystem; 29 import com.android.server.telecom.Timeouts; 30 31 import java.util.List; 32 33 public class IncomingCallFilter implements CallFilterResultCallback { 34 35 public interface CallFilter { startFilterLookup(Call call, CallFilterResultCallback listener)36 void startFilterLookup(Call call, CallFilterResultCallback listener); 37 } 38 39 private final TelecomSystem.SyncRoot mTelecomLock; 40 private final Context mContext; 41 private final Handler mHandler = new Handler(Looper.getMainLooper()); 42 private final List<CallFilter> mFilters; 43 private final Call mCall; 44 private final CallFilterResultCallback mListener; 45 private final Timeouts.Adapter mTimeoutsAdapter; 46 47 private CallFilteringResult mResult = new CallFilteringResult( 48 true, // shouldAllowCall 49 false, // shouldReject 50 true, // shouldAddToCallLog 51 true // shouldShowNotification 52 ); 53 54 private boolean mIsPending = true; 55 private int mNumPendingFilters; 56 IncomingCallFilter(Context context, CallFilterResultCallback listener, Call call, TelecomSystem.SyncRoot lock, Timeouts.Adapter timeoutsAdapter, List<CallFilter> filters)57 public IncomingCallFilter(Context context, CallFilterResultCallback listener, Call call, 58 TelecomSystem.SyncRoot lock, Timeouts.Adapter timeoutsAdapter, 59 List<CallFilter> filters) { 60 mContext = context; 61 mListener = listener; 62 mCall = call; 63 mTelecomLock = lock; 64 mFilters = filters; 65 mNumPendingFilters = filters.size(); 66 mTimeoutsAdapter = timeoutsAdapter; 67 } 68 performFiltering()69 public void performFiltering() { 70 Log.addEvent(mCall, LogUtils.Events.FILTERING_INITIATED); 71 for (CallFilter filter : mFilters) { 72 filter.startFilterLookup(mCall, this); 73 } 74 // synchronized to prevent a race on mResult and to enter into Telecom. 75 mHandler.postDelayed(new Runnable("ICF.pFTO", mTelecomLock) { // performFiltering time-out 76 @Override 77 public void loggedRun() { 78 if (mIsPending) { 79 Log.i(IncomingCallFilter.this, "Call filtering has timed out."); 80 Log.addEvent(mCall, LogUtils.Events.FILTERING_TIMED_OUT); 81 mListener.onCallFilteringComplete(mCall, mResult); 82 mIsPending = false; 83 } 84 } 85 }.prepare(), mTimeoutsAdapter.getCallScreeningTimeoutMillis(mContext.getContentResolver())); 86 } 87 onCallFilteringComplete(Call call, CallFilteringResult result)88 public void onCallFilteringComplete(Call call, CallFilteringResult result) { 89 synchronized (mTelecomLock) { // synchronizing to prevent race on mResult 90 mNumPendingFilters--; 91 mResult = result.combine(mResult); 92 if (mNumPendingFilters == 0) { 93 // synchronized on mTelecomLock to enter into Telecom. 94 mHandler.post(new Runnable("ICF.oCFC", mTelecomLock) { 95 @Override 96 public void loggedRun() { 97 if (mIsPending) { 98 Log.addEvent(mCall, LogUtils.Events.FILTERING_COMPLETED, mResult); 99 mListener.onCallFilteringComplete(mCall, mResult); 100 mIsPending = false; 101 } 102 } 103 }.prepare()); 104 } 105 } 106 } 107 108 /** 109 * Returns the handler, for testing purposes. 110 */ 111 @VisibleForTesting getHandler()112 public Handler getHandler() { 113 return mHandler; 114 } 115 } 116