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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 package com.android.contacts.model;
     17 
     18 import android.accounts.AccountManager;
     19 import android.content.ContentResolver;
     20 import android.database.Cursor;
     21 import android.net.Uri;
     22 import android.provider.ContactsContract;
     23 import android.support.annotation.VisibleForTesting;
     24 
     25 import com.android.contacts.model.account.AccountWithDataSet;
     26 import com.android.contacts.util.DeviceLocalAccountTypeFactory;
     27 
     28 import java.util.ArrayList;
     29 import java.util.HashSet;
     30 import java.util.List;
     31 import java.util.Set;
     32 
     33 /**
     34  * Attempts to create accounts for "Device" contacts by querying
     35  * CP2 for records with {@link android.provider.ContactsContract.RawContacts#ACCOUNT_TYPE} columns
     36  * that do not exist for any account returned by {@link AccountManager#getAccounts()}
     37  *
     38  * This class should be used from a background thread since it does DB queries
     39  */
     40 public class Cp2DeviceLocalAccountLocator extends DeviceLocalAccountLocator {
     41 
     42     // Note this class is assuming ACCOUNT_NAME and ACCOUNT_TYPE have same values in
     43     // RawContacts, Groups, and Settings. This assumption simplifies the code somewhat and it
     44     // is true right now and unlikely to ever change.
     45     @VisibleForTesting
     46     static String[] PROJECTION = new String[] {
     47             ContactsContract.RawContacts.ACCOUNT_NAME, ContactsContract.RawContacts.ACCOUNT_TYPE,
     48             ContactsContract.RawContacts.DATA_SET
     49     };
     50 
     51     private static final int COL_NAME = 0;
     52     private static final int COL_TYPE = 1;
     53     private static final int COL_DATA_SET = 2;
     54 
     55     private final ContentResolver mResolver;
     56     private final DeviceLocalAccountTypeFactory mAccountTypeFactory;
     57 
     58     private final String mSelection;
     59     private final String[] mSelectionArgs;
     60 
     61     public Cp2DeviceLocalAccountLocator(ContentResolver contentResolver,
     62             DeviceLocalAccountTypeFactory factory,
     63             Set<String> knownAccountTypes) {
     64         mResolver = contentResolver;
     65         mAccountTypeFactory = factory;
     66 
     67         mSelection = getSelection(knownAccountTypes);
     68         mSelectionArgs = getSelectionArgs(knownAccountTypes);
     69     }
     70 
     71     @Override
     72     public List<AccountWithDataSet> getDeviceLocalAccounts() {
     73 
     74         final Set<AccountWithDataSet> localAccounts = new HashSet<>();
     75 
     76         // Many device accounts have default groups associated with them.
     77         addAccountsFromQuery(ContactsContract.Groups.CONTENT_URI, localAccounts);
     78         addAccountsFromQuery(ContactsContract.Settings.CONTENT_URI, localAccounts);
     79         addAccountsFromQuery(ContactsContract.RawContacts.CONTENT_URI, localAccounts);
     80 
     81         return new ArrayList<>(localAccounts);
     82     }
     83 
     84     private void addAccountsFromQuery(Uri uri, Set<AccountWithDataSet> accounts) {
     85         final Cursor cursor = mResolver.query(uri, PROJECTION, mSelection, mSelectionArgs, null);
     86 
     87         if (cursor == null) return;
     88 
     89         try {
     90             addAccountsFromCursor(cursor, accounts);
     91         } finally {
     92             cursor.close();
     93         }
     94     }
     95 
     96     private void addAccountsFromCursor(Cursor cursor, Set<AccountWithDataSet> accounts) {
     97         while (cursor.moveToNext()) {
     98             final String name = cursor.getString(COL_NAME);
     99             final String type = cursor.getString(COL_TYPE);
    100             final String dataSet = cursor.getString(COL_DATA_SET);
    101 
    102             if (DeviceLocalAccountTypeFactory.Util.isLocalAccountType(
    103                     mAccountTypeFactory, type)) {
    104                 accounts.add(new AccountWithDataSet(name, type, dataSet));
    105             }
    106         }
    107     }
    108 
    109     @VisibleForTesting
    110     public String getSelection() {
    111         return mSelection;
    112     }
    113 
    114     @VisibleForTesting
    115     public String[] getSelectionArgs() {
    116         return mSelectionArgs;
    117     }
    118 
    119     private static String getSelection(Set<String> knownAccountTypes) {
    120         final StringBuilder sb = new StringBuilder()
    121                 .append(ContactsContract.RawContacts.ACCOUNT_TYPE).append(" IS NULL");
    122         if (knownAccountTypes.isEmpty()) {
    123             return sb.toString();
    124         }
    125         sb.append(" OR ").append(ContactsContract.RawContacts.ACCOUNT_TYPE).append(" NOT IN (");
    126         for (String ignored : knownAccountTypes) {
    127             sb.append("?,");
    128         }
    129         // Remove trailing ','
    130         sb.deleteCharAt(sb.length() - 1).append(')');
    131         return sb.toString();
    132     }
    133 
    134     private static String[] getSelectionArgs(Set<String> knownAccountTypes) {
    135         if (knownAccountTypes.isEmpty()) return null;
    136 
    137         return knownAccountTypes.toArray(new String[knownAccountTypes.size()]);
    138     }
    139 }
    140