1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5 * except in compliance with the License. You may obtain a copy of the License at
6 *
7 *      http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the
10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11 * KIND, either express or implied. See the License for the specific language governing
12 * permissions and limitations under the License.
13 */
14
15package com.android.settings.datausage;
16
17import static android.net.ConnectivityManager.TYPE_WIFI;
18
19import android.content.Context;
20import android.net.ConnectivityManager;
21import android.net.NetworkTemplate;
22import android.os.SystemProperties;
23import android.telephony.SubscriptionInfo;
24import android.telephony.SubscriptionManager;
25import android.telephony.TelephonyManager;
26import java.util.List;
27
28/**
29 * Utility methods for data usage classes.
30 */
31public final class DataUsageUtils {
32    static final boolean TEST_RADIOS = false;
33    static final String TEST_RADIOS_PROP = "test.radios";
34
35    private DataUsageUtils() {
36    }
37
38    /**
39     * Returns whether device has mobile data.
40     * TODO: This is the opposite to Utils.isWifiOnly(), it should be refactored into 1 method.
41     */
42    public static boolean hasMobileData(Context context) {
43        ConnectivityManager connectivityManager = ConnectivityManager.from(context);
44        return connectivityManager != null && connectivityManager
45                .isNetworkSupported(ConnectivityManager.TYPE_MOBILE);
46    }
47
48    /**
49     * Whether device has a Wi-Fi data radio.
50     */
51    public static boolean hasWifiRadio(Context context) {
52        if (TEST_RADIOS) {
53            return SystemProperties.get(TEST_RADIOS_PROP).contains("wifi");
54        }
55
56        ConnectivityManager connectivityManager = ConnectivityManager.from(context);
57        return connectivityManager != null && connectivityManager.isNetworkSupported(TYPE_WIFI);
58    }
59
60    /**
61     * Returns the default subscription if available else returns
62     * SubscriptionManager#INVALID_SUBSCRIPTION_ID
63     */
64    public static int getDefaultSubscriptionId(Context context) {
65        SubscriptionManager subManager = SubscriptionManager.from(context);
66        if (subManager == null) {
67            return SubscriptionManager.INVALID_SUBSCRIPTION_ID;
68        }
69        SubscriptionInfo subscriptionInfo = subManager.getDefaultDataSubscriptionInfo();
70        if (subscriptionInfo == null) {
71            List<SubscriptionInfo> list = subManager.getAllSubscriptionInfoList();
72            if (list.size() == 0) {
73                return SubscriptionManager.INVALID_SUBSCRIPTION_ID;
74            }
75            subscriptionInfo = list.get(0);
76        }
77        return subscriptionInfo.getSubscriptionId();
78    }
79
80    /**
81     * Returns the default network template based on the availability of mobile data, Wifi. Returns
82     * ethernet template if both mobile data and Wifi are not available.
83     */
84    static NetworkTemplate getDefaultTemplate(Context context, int defaultSubId) {
85        if (hasMobileData(context) && defaultSubId != SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
86            TelephonyManager telephonyManager = TelephonyManager.from(context);
87            NetworkTemplate mobileAll = NetworkTemplate.buildTemplateMobileAll(
88                    telephonyManager.getSubscriberId(defaultSubId));
89            return NetworkTemplate.normalize(mobileAll,
90                    telephonyManager.getMergedSubscriberIds());
91        } else if (hasWifiRadio(context)) {
92            return NetworkTemplate.buildTemplateWifiWildcard();
93        } else {
94            return NetworkTemplate.buildTemplateEthernet();
95        }
96    }
97}
98