Home | History | Annotate | Download | only in systemcalllog
      1 /*
      2  * Copyright (C) 2017 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.dialer.calllog.datasources.systemcalllog;
     18 
     19 import android.content.Context;
     20 import android.database.ContentObserver;
     21 import android.database.sqlite.SQLiteDatabase;
     22 import android.net.Uri;
     23 import android.os.Handler;
     24 import android.provider.CallLog;
     25 import android.support.annotation.MainThread;
     26 import android.support.annotation.WorkerThread;
     27 import com.android.dialer.calllog.database.CallLogMutations;
     28 import com.android.dialer.calllog.datasources.CallLogDataSource;
     29 import com.android.dialer.common.Assert;
     30 import com.android.dialer.common.LogUtil;
     31 import com.android.dialer.common.concurrent.ThreadUtil;
     32 import com.android.dialer.util.PermissionsUtil;
     33 import javax.inject.Inject;
     34 
     35 /**
     36  * Responsible for defining the rows in the annotated call log and maintaining the columns in it
     37  * which are derived from the system call log.
     38  */
     39 public class SystemCallLogDataSource implements CallLogDataSource {
     40 
     41   @Inject
     42   public SystemCallLogDataSource() {}
     43 
     44   @MainThread
     45   @Override
     46   public void registerContentObservers(
     47       Context appContext, ContentObserverCallbacks contentObserverCallbacks) {
     48     Assert.isMainThread();
     49 
     50     if (!PermissionsUtil.hasCallLogReadPermissions(appContext)) {
     51       LogUtil.i("SystemCallLogDataSource.registerContentObservers", "no call log permissions");
     52       return;
     53     }
     54 
     55     appContext
     56         .getContentResolver()
     57         .registerContentObserver(
     58             CallLog.Calls.CONTENT_URI,
     59             true,
     60             new CallLogObserver(
     61                 ThreadUtil.getUiThreadHandler(), appContext, contentObserverCallbacks));
     62   }
     63 
     64   @WorkerThread
     65   @Override
     66   public boolean isDirty(Context appContext) {
     67     Assert.isWorkerThread();
     68 
     69     /*
     70      * The system call log has a last updated timestamp, but deletes are physical (the "deleted"
     71      * column is unused). This means that we can't detect deletes without scanning the entire table,
     72      * which would be too slow. So, we just rely on content observers to trigger rebuilds when any
     73      * change is made to the system call log.
     74      */
     75     return false;
     76   }
     77 
     78   @WorkerThread
     79   @Override
     80   public void fill(
     81       Context appContext,
     82       SQLiteDatabase readableDatabase,
     83       long lastRebuildTimeMillis,
     84       CallLogMutations mutations) {
     85     Assert.isWorkerThread();
     86 
     87     // This data source should always run first so the mutations should always be empty.
     88     Assert.checkState(mutations.isEmpty());
     89 
     90     // TODO: Implementation.
     91   }
     92 
     93   private static class CallLogObserver extends ContentObserver {
     94     private final Context appContext;
     95     private final ContentObserverCallbacks contentObserverCallbacks;
     96 
     97     CallLogObserver(
     98         Handler handler, Context appContext, ContentObserverCallbacks contentObserverCallbacks) {
     99       super(handler);
    100       this.appContext = appContext;
    101       this.contentObserverCallbacks = contentObserverCallbacks;
    102     }
    103 
    104     @MainThread
    105     @Override
    106     public void onChange(boolean selfChange, Uri uri) {
    107       Assert.isMainThread();
    108       LogUtil.enterBlock("SystemCallLogDataSource.CallLogObserver.onChange");
    109       super.onChange(selfChange, uri);
    110 
    111       /*
    112        * The system call log has a last updated timestamp, but deletes are physical (the "deleted"
    113        * column is unused). This means that we can't detect deletes without scanning the entire
    114        * table, which would be too slow. So, we just rely on content observers to trigger rebuilds
    115        * when any change is made to the system call log.
    116        */
    117       contentObserverCallbacks.markDirtyAndNotify(appContext);
    118     }
    119   }
    120 }
    121