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      1 /*
      2  * Copyright (C) 2015 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.filterednumber;
     18 
     19 import com.google.common.base.Preconditions;
     20 
     21 import android.content.ContentResolver;
     22 import android.content.ContentValues;
     23 import android.database.Cursor;
     24 import android.os.AsyncTask;
     25 
     26 import com.android.dialer.compat.BlockedNumbersSdkCompat;
     27 import com.android.dialer.compat.FilteredNumberCompat;
     28 import com.android.dialer.database.FilteredNumberContract;
     29 import com.android.dialer.database.FilteredNumberContract.FilteredNumber;
     30 import com.android.dialer.database.FilteredNumberContract.FilteredNumberColumns;
     31 import com.android.incallui.Log;
     32 
     33 /**
     34  * Class which should be used to migrate numbers from {@link FilteredNumberContract} blocking to
     35  * {@link android.provider.BlockedNumberContract} blocking.
     36  */
     37 public class BlockedNumbersMigrator {
     38 
     39     private static final String TAG = "BlockedNumbersMigrator";
     40 
     41     /**
     42      * Listener for the operation to migrate from {@link FilteredNumberContract} blocking to
     43      * {@link android.provider.BlockedNumberContract} blocking.
     44      */
     45     public interface Listener {
     46 
     47         /**
     48          * Called when the migration operation is finished.
     49          */
     50         void onComplete();
     51     }
     52 
     53     private final ContentResolver mContentResolver;
     54 
     55     /**
     56      * Creates a new BlockedNumbersMigrate, using the given {@link ContentResolver} to perform
     57      * queries against the blocked numbers tables.
     58      *
     59      * @param contentResolver The ContentResolver
     60      * @throws NullPointerException if contentResolver is null
     61      */
     62     public BlockedNumbersMigrator(ContentResolver contentResolver) {
     63         mContentResolver = Preconditions.checkNotNull(contentResolver);
     64     }
     65 
     66     /**
     67      * Copies all of the numbers in the {@link FilteredNumberContract} block list to the
     68      * {@link android.provider.BlockedNumberContract} block list.
     69      *
     70      * @param listener {@link Listener} called once the migration is complete.
     71      * @return {@code true} if the migrate can be attempted, {@code false} otherwise.
     72      * @throws NullPointerException if listener is null
     73      */
     74     public boolean migrate(final Listener listener) {
     75         Log.i(TAG, "migrate - start");
     76         if (!FilteredNumberCompat.canUseNewFiltering()) {
     77             Log.i(TAG, "migrate - can't use new filtering");
     78             return false;
     79         }
     80         Preconditions.checkNotNull(listener);
     81         new AsyncTask<Void, Void, Boolean>() {
     82             @Override
     83             protected Boolean doInBackground(Void... params) {
     84                 Log.i(TAG, "migrate - start background migration");
     85                 return migrateToNewBlockingInBackground(mContentResolver);
     86             }
     87 
     88             @Override
     89             protected void onPostExecute(Boolean isSuccessful) {
     90                 Log.i(TAG, "migrate - marking migration complete");
     91                 FilteredNumberCompat.setHasMigratedToNewBlocking(isSuccessful);
     92                 Log.i(TAG, "migrate - calling listener");
     93                 listener.onComplete();
     94             }
     95         }.execute();
     96         return true;
     97     }
     98 
     99     private static boolean migrateToNewBlockingInBackground(ContentResolver resolver) {
    100         try (Cursor cursor = resolver.query(FilteredNumber.CONTENT_URI,
    101                 new String[]{FilteredNumberColumns.NUMBER}, null, null, null)) {
    102             if (cursor == null) {
    103                 Log.i(TAG, "migrate - cursor was null");
    104                 return false;
    105             }
    106 
    107             Log.i(TAG, "migrate - attempting to migrate " + cursor.getCount() + "numbers");
    108 
    109             int numMigrated = 0;
    110             while (cursor.moveToNext()) {
    111                 String originalNumber = cursor
    112                         .getString(cursor.getColumnIndex(FilteredNumberColumns.NUMBER));
    113                 if (isNumberInNewBlocking(resolver, originalNumber)) {
    114                     Log.i(TAG, "migrate - number was already blocked in new blocking");
    115                     continue;
    116                 }
    117                 ContentValues values = new ContentValues();
    118                 values.put(BlockedNumbersSdkCompat.COLUMN_ORIGINAL_NUMBER, originalNumber);
    119                 resolver.insert(BlockedNumbersSdkCompat.CONTENT_URI, values);
    120                 ++numMigrated;
    121             }
    122             Log.i(TAG, "migrate - migration complete. " + numMigrated + " numbers migrated.");
    123             return true;
    124         }
    125     }
    126 
    127     private static boolean isNumberInNewBlocking(ContentResolver resolver, String originalNumber) {
    128         try (Cursor cursor = resolver.query(BlockedNumbersSdkCompat.CONTENT_URI,
    129                 new String[]{BlockedNumbersSdkCompat._ID},
    130                 BlockedNumbersSdkCompat.COLUMN_ORIGINAL_NUMBER + " = ?",
    131                 new String[] {originalNumber}, null)) {
    132             return cursor != null && cursor.getCount() != 0;
    133         }
    134     }
    135 }
    136