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;
23import android.util.Log;
24
25/**
26 * LocalBluetoothPreferences provides an interface to the preferences
27 * related to Bluetooth.
28 */
29final class LocalBluetoothPreferences {
30    private static final String TAG = "LocalBluetoothPreferences";
31    private static final boolean DEBUG = Utils.D;
32    private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
33
34    // If a device was picked from the device picker or was in discoverable mode
35    // in the last 60 seconds, show the pairing dialogs in foreground instead
36    // of raising notifications
37    private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
38
39    private static final String KEY_DISCOVERING_TIMESTAMP = "last_discovering_time";
40
41    private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
42
43    private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
44
45    private static final String KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";
46
47    private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
48
49    private LocalBluetoothPreferences() {
50    }
51
52    private static SharedPreferences getSharedPreferences(Context context) {
53        return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
54    }
55
56    static long getDiscoverableEndTimestamp(Context context) {
57        return getSharedPreferences(context).getLong(
58                KEY_DISCOVERABLE_END_TIMESTAMP, 0);
59    }
60
61    static boolean shouldShowDialogInForeground(Context context,
62            String deviceAddress) {
63        LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
64        if (manager == null) {
65            if(DEBUG) Log.v(TAG, "manager == null - do not show dialog.");
66            return false;
67        }
68
69        // If Bluetooth Settings is visible
70        if (manager.isForegroundActivity()) {
71            return true;
72        }
73
74        // If in appliance mode, do not show dialog in foreground.
75        if ((context.getResources().getConfiguration().uiMode &
76                Configuration.UI_MODE_TYPE_APPLIANCE) == Configuration.UI_MODE_TYPE_APPLIANCE) {
77            if (DEBUG) Log.v(TAG, "in appliance mode - do not show dialog.");
78            return false;
79        }
80
81        long currentTimeMillis = System.currentTimeMillis();
82        SharedPreferences sharedPreferences = getSharedPreferences(context);
83
84        // If the device was in discoverABLE mode recently
85        long lastDiscoverableEndTime = sharedPreferences.getLong(
86                KEY_DISCOVERABLE_END_TIMESTAMP, 0);
87        if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
88                > currentTimeMillis) {
89            return true;
90        }
91
92        // If the device was discoverING recently
93        LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
94        if (adapter != null && adapter.isDiscovering()) {
95            return true;
96        } else if ((sharedPreferences.getLong(KEY_DISCOVERING_TIMESTAMP, 0) +
97                GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
98            return true;
99        }
100
101        // If the device was picked in the device picker recently
102        if (deviceAddress != null) {
103            String lastSelectedDevice = sharedPreferences.getString(
104                    KEY_LAST_SELECTED_DEVICE, null);
105
106            if (deviceAddress.equals(lastSelectedDevice)) {
107                long lastDeviceSelectedTime = sharedPreferences.getLong(
108                        KEY_LAST_SELECTED_DEVICE_TIME, 0);
109                if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
110                        > currentTimeMillis) {
111                    return true;
112                }
113            }
114        }
115        if (DEBUG) Log.v(TAG, "Found no reason to show the dialog - do not show dialog.");
116        return false;
117    }
118
119    static void persistSelectedDeviceInPicker(Context context, String deviceAddress) {
120        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
121        editor.putString(KEY_LAST_SELECTED_DEVICE,
122                deviceAddress);
123        editor.putLong(KEY_LAST_SELECTED_DEVICE_TIME,
124                System.currentTimeMillis());
125        editor.apply();
126    }
127
128    static void persistDiscoverableEndTimestamp(Context context, long endTimestamp) {
129        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
130        editor.putLong(KEY_DISCOVERABLE_END_TIMESTAMP, endTimestamp);
131        editor.apply();
132    }
133
134    static void persistDiscoveringTimestamp(final Context context) {
135        // Load the shared preferences and edit it on a background
136        // thread (but serialized!).
137        QueuedWork.singleThreadExecutor().submit(new Runnable() {
138                public void run() {
139                    SharedPreferences.Editor editor = getSharedPreferences(context).edit();
140                    editor.putLong(
141                            KEY_DISCOVERING_TIMESTAMP,
142                        System.currentTimeMillis());
143                    editor.apply();
144                }
145            });
146    }
147
148    static boolean hasDockAutoConnectSetting(Context context, String addr) {
149        return getSharedPreferences(context).contains(KEY_DOCK_AUTO_CONNECT + addr);
150    }
151
152    static boolean getDockAutoConnectSetting(Context context, String addr) {
153        return getSharedPreferences(context).getBoolean(KEY_DOCK_AUTO_CONNECT + addr,
154                false);
155    }
156
157    static void saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect) {
158        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
159        editor.putBoolean(KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
160        editor.apply();
161    }
162
163    static void removeDockAutoConnectSetting(Context context, String addr) {
164        SharedPreferences.Editor editor = getSharedPreferences(context).edit();
165        editor.remove(KEY_DOCK_AUTO_CONNECT + addr);
166        editor.apply();
167    }
168}
169