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      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.net.Uri;
     21 import android.os.AsyncTask;
     22 import android.os.Bundle;
     23 import android.provider.BlockedNumberContract;
     24 import android.telecom.Log;
     25 import android.telecom.Logging.Session;
     26 import android.telecom.TelecomManager;
     27 
     28 import com.android.internal.telephony.CallerInfo;
     29 import com.android.server.telecom.Call;
     30 import com.android.server.telecom.CallerInfoLookupHelper;
     31 import com.android.server.telecom.LogUtils;
     32 import com.android.server.telecom.settings.BlockedNumbersUtil;
     33 
     34 /**
     35  * An {@link AsyncTask} that checks if a call needs to be blocked.
     36  * <p> An {@link AsyncTask} is used to perform the block check to avoid blocking the main thread.
     37  * The block check itself is performed in the {@link AsyncTask#doInBackground(Object[])}.
     38  */
     39 public class AsyncBlockCheckFilter extends AsyncTask<String, Void, Boolean>
     40         implements IncomingCallFilter.CallFilter {
     41     private final Context mContext;
     42     private final BlockCheckerAdapter mBlockCheckerAdapter;
     43     private Call mIncomingCall;
     44     private Session mBackgroundTaskSubsession;
     45     private Session mPostExecuteSubsession;
     46     private CallFilterResultCallback mCallback;
     47     private CallerInfoLookupHelper mCallerInfoLookupHelper;
     48 
     49     public AsyncBlockCheckFilter(Context context, BlockCheckerAdapter blockCheckerAdapter,
     50             CallerInfoLookupHelper callerInfoLookupHelper) {
     51         mContext = context;
     52         mBlockCheckerAdapter = blockCheckerAdapter;
     53         mCallerInfoLookupHelper = callerInfoLookupHelper;
     54     }
     55 
     56     @Override
     57     public void startFilterLookup(Call call, CallFilterResultCallback callback) {
     58         mCallback = callback;
     59         mIncomingCall = call;
     60         String number = call.getHandle() == null ?
     61                 null : call.getHandle().getSchemeSpecificPart();
     62         if (BlockedNumbersUtil.isEnhancedCallBlockingEnabledByPlatform(mContext)) {
     63             int presentation = mIncomingCall.getHandlePresentation();
     64             if (presentation == TelecomManager.PRESENTATION_ALLOWED) {
     65                 mCallerInfoLookupHelper.startLookup(call.getHandle(),
     66                         new CallerInfoLookupHelper.OnQueryCompleteListener() {
     67                             @Override
     68                             public void onCallerInfoQueryComplete(Uri handle, CallerInfo info) {
     69                                 boolean contactExists = info == null ? false : info.contactExists;
     70                                 execute(number, String.valueOf(presentation),
     71                                         String.valueOf(contactExists));
     72                             }
     73 
     74                             @Override
     75                             public void onContactPhotoQueryComplete(Uri handle, CallerInfo info) {
     76                                 // ignore
     77                             }
     78                         });
     79             } else {
     80                 this.execute(number, String.valueOf(presentation));
     81             }
     82         } else {
     83             this.execute(number);
     84         }
     85     }
     86 
     87     @Override
     88     protected void onPreExecute() {
     89         mBackgroundTaskSubsession = Log.createSubsession();
     90         mPostExecuteSubsession = Log.createSubsession();
     91     }
     92 
     93     @Override
     94     protected Boolean doInBackground(String... params) {
     95         try {
     96             Log.continueSession(mBackgroundTaskSubsession, "ABCF.dIB");
     97             Log.addEvent(mIncomingCall, LogUtils.Events.BLOCK_CHECK_INITIATED);
     98             Bundle extras = new Bundle();
     99             if (params.length > 1) {
    100                 extras.putInt(BlockedNumberContract.EXTRA_CALL_PRESENTATION,
    101                         Integer.valueOf(params[1]));
    102             }
    103             if (params.length > 2) {
    104                 extras.putBoolean(BlockedNumberContract.EXTRA_CONTACT_EXIST,
    105                         Boolean.valueOf(params[2]));
    106             }
    107             return mBlockCheckerAdapter.isBlocked(mContext, params[0], extras);
    108         } finally {
    109             Log.endSession();
    110         }
    111     }
    112 
    113     @Override
    114     protected void onPostExecute(Boolean isBlocked) {
    115         Log.continueSession(mPostExecuteSubsession, "ABCF.oPE");
    116         try {
    117             CallFilteringResult result;
    118             if (isBlocked) {
    119                 result = new CallFilteringResult(
    120                         false, // shouldAllowCall
    121                         true, //shouldReject
    122                         false, //shouldAddToCallLog
    123                         false // shouldShowNotification
    124                 );
    125             } else {
    126                 result = new CallFilteringResult(
    127                         true, // shouldAllowCall
    128                         false, // shouldReject
    129                         true, // shouldAddToCallLog
    130                         true // shouldShowNotification
    131                 );
    132             }
    133             Log.addEvent(mIncomingCall, LogUtils.Events.BLOCK_CHECK_FINISHED, result);
    134             mCallback.onCallFilteringComplete(mIncomingCall, result);
    135         } finally {
    136             Log.endSession();
    137         }
    138     }
    139 }
    140