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 androidx.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 
Cp2DeviceLocalAccountLocator(ContentResolver contentResolver, DeviceLocalAccountTypeFactory factory, Set<String> knownAccountTypes)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
getDeviceLocalAccounts()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 
addAccountsFromQuery(Uri uri, Set<AccountWithDataSet> accounts)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 
addAccountsFromCursor(Cursor cursor, Set<AccountWithDataSet> accounts)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
getSelection()110     public String getSelection() {
111         return mSelection;
112     }
113 
114     @VisibleForTesting
getSelectionArgs()115     public String[] getSelectionArgs() {
116         return mSelectionArgs;
117     }
118 
getSelection(Set<String> knownAccountTypes)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 
getSelectionArgs(Set<String> knownAccountTypes)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