1/*
2 * Copyright (C) 2008 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
17package com.android.settings.bluetooth;
18
19import android.app.QueuedWork;
20import android.content.Context;
21import android.content.SharedPreferences;
22import android.content.res.Configuration;
23
24/**
25 * LocalBluetoothPreferences provides an interface to the preferences
26 * related to Bluetooth.
27 */
28final class LocalBluetoothPreferences {
29//    private static final String TAG = "LocalBluetoothPreferences";
30
31    private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
32
33    // If a device was picked from the device picker or was in discoverable mode
34    // in the last 60 seconds, show the pairing dialogs in foreground instead
35    // of raising notifications
36    private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
37
38    private static final String KEY_DISCOVERING_TIMESTAMP = "last_discovering_time";
39
40    private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
41
42    private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
43
44    private static final String KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";
45
46    private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
47
48    private LocalBluetoothPreferences() {
49    }
50
51    private static SharedPreferences getSharedPreferences(Context context) {
52        return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
53    }
54
55    static long getDiscoverableEndTimestamp(Context context) {
56        return getSharedPreferences(context).getLong(
57                KEY_DISCOVERABLE_END_TIMESTAMP, 0);
58    }
59
60    static boolean shouldShowDialogInForeground(Context context,
61            String deviceAddress) {
62        LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
63        if (manager == null) {
64            return false;
65        }
66
67        // If Bluetooth Settings is visible
68        if (manager.isForegroundActivity()) {
69            return true;
70        }
71
72        // If in appliance mode, do not show dialog in foreground.
73        if ((context.getResources().getConfiguration().uiMode &
74                Configuration.UI_MODE_TYPE_APPLIANCE) == Configuration.UI_MODE_TYPE_APPLIANCE) {
75            return false;
76        }
77
78        long currentTimeMillis = System.currentTimeMillis();
79        SharedPreferences sharedPreferences = getSharedPreferences(context);
80
81        // If the device was in discoverABLE mode recently
82        long lastDiscoverableEndTime = sharedPreferences.getLong(
83                KEY_DISCOVERABLE_END_TIMESTAMP, 0);
84        if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
85                > currentTimeMillis) {
86            return true;
87        }
88
89        // If the device was discoverING recently
90        LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
91        if (adapter != null && adapter.isDiscovering()) {
92            return true;
93        } else if ((sharedPreferences.getLong(KEY_DISCOVERING_TIMESTAMP, 0) +
94                GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
95            return true;
96        }
97
98        // If the device was picked in the device picker recently
99        if (deviceAddress != null) {
100            String lastSelectedDevice = sharedPreferences.getString(
101                    KEY_LAST_SELECTED_DEVICE, null);
102
103            if (deviceAddress.equals(lastSelectedDevice)) {
104                long lastDeviceSelectedTime = sharedPreferences.getLong(
105                        KEY_LAST_SELECTED_DEVICE_TIME, 0);
106                if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
107                        > currentTimeMillis) {
108                    return true;
109                }
110            }
111        }
112        return false;
113    }
114
115    static void persistSelectedDeviceInPicker(Context context, String deviceAddress) {
116        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
117        editor.putString(KEY_LAST_SELECTED_DEVICE,
118                deviceAddress);
119        editor.putLong(KEY_LAST_SELECTED_DEVICE_TIME,
120                System.currentTimeMillis());
121        editor.apply();
122    }
123
124    static void persistDiscoverableEndTimestamp(Context context, long endTimestamp) {
125        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
126        editor.putLong(KEY_DISCOVERABLE_END_TIMESTAMP, endTimestamp);
127        editor.apply();
128    }
129
130    static void persistDiscoveringTimestamp(final Context context) {
131        // Load the shared preferences and edit it on a background
132        // thread (but serialized!).
133        QueuedWork.singleThreadExecutor().submit(new Runnable() {
134                public void run() {
135                    SharedPreferences.Editor editor = getSharedPreferences(context).edit();
136                    editor.putLong(
137                            KEY_DISCOVERING_TIMESTAMP,
138                        System.currentTimeMillis());
139                    editor.apply();
140                }
141            });
142    }
143
144    static boolean hasDockAutoConnectSetting(Context context, String addr) {
145        return getSharedPreferences(context).contains(KEY_DOCK_AUTO_CONNECT + addr);
146    }
147
148    static boolean getDockAutoConnectSetting(Context context, String addr) {
149        return getSharedPreferences(context).getBoolean(KEY_DOCK_AUTO_CONNECT + addr,
150                false);
151    }
152
153    static void saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect) {
154        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
155        editor.putBoolean(KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
156        editor.apply();
157    }
158
159    static void removeDockAutoConnectSetting(Context context, String addr) {
160        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
161        editor.remove(KEY_DOCK_AUTO_CONNECT + addr);
162        editor.apply();
163    }
164}
165