1/*
2 * Copyright (C) 2017 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.carrierdefaultapp;
18
19import android.app.job.JobInfo;
20import android.app.job.JobParameters;
21import android.app.job.JobScheduler;
22import android.app.job.JobService;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.net.ConnectivityManager;
27import android.net.Network;
28import android.net.NetworkCapabilities;
29import android.provider.Settings;
30import android.util.Log;
31
32import com.android.internal.telephony.TelephonyIntents;
33
34/**
35 * Service to run {@link android.app.job.JobScheduler} job.
36 * Service to monitor when there is a change to conent URI
37 * {@link android.provider.Settings.Global#DEVICE_PROVISIONED DEVICE_PROVISIONED}
38 */
39public class ProvisionObserver extends JobService {
40
41    private static final String TAG = ProvisionObserver.class.getSimpleName();
42    public static final int PROVISION_OBSERVER_REEVALUATION_JOB_ID = 1;
43    // minimum & maximum update delay TBD
44    private static final int CONTENT_UPDATE_DELAY_MS = 100;
45    private static final int CONTENT_MAX_DELAY_MS = 200;
46
47    @Override
48    public boolean onStartJob(JobParameters jobParameters) {
49        switch (jobParameters.getJobId()) {
50            case PROVISION_OBSERVER_REEVALUATION_JOB_ID:
51                if (isProvisioned(this)) {
52                    Log.d(TAG, "device provisioned, force network re-evaluation");
53                    final ConnectivityManager connMgr = ConnectivityManager.from(this);
54                    Network[] info = connMgr.getAllNetworks();
55                    for (Network nw : info) {
56                        final NetworkCapabilities nc = connMgr.getNetworkCapabilities(nw);
57                        if (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
58                                && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
59                            // force connectivity re-evaluation to assume skipped carrier actions.
60                            // one of the following calls will match the last evaluation.
61                            connMgr.reportNetworkConnectivity(nw, true);
62                            connMgr.reportNetworkConnectivity(nw, false);
63                            break;
64                        }
65                    }
66                }
67            default:
68                break;
69        }
70        return false;
71    }
72
73    @Override
74    public boolean onStopJob(JobParameters jobParameters) {
75        return false;
76    }
77
78    // Returns true if the device is not provisioned yet (in setup wizard), false otherwise
79    private static boolean isProvisioned(Context context) {
80        return Settings.Global.getInt(context.getContentResolver(),
81                Settings.Global.DEVICE_PROVISIONED, 0) == 1;
82    }
83
84    /**
85     * Static utility function to schedule a job to execute upon the change of content URI
86     * {@link android.provider.Settings.Global#DEVICE_PROVISIONED DEVICE_PROVISIONED}.
87     * @param context The context used to retrieve the {@link ComponentName} and system services
88     * @return true carrier actions are deferred due to phone provisioning process, false otherwise
89     */
90    public static boolean isDeferredForProvision(Context context, Intent intent) {
91        if (isProvisioned(context)) {
92            return false;
93        }
94        int jobId;
95        switch(intent.getAction()) {
96            case TelephonyIntents.ACTION_CARRIER_SIGNAL_REDIRECTED:
97                jobId = PROVISION_OBSERVER_REEVALUATION_JOB_ID;
98                break;
99            default:
100                return false;
101        }
102        final JobScheduler jobScheduler =  (JobScheduler) context.getSystemService(
103                Context.JOB_SCHEDULER_SERVICE);
104        final JobInfo job = new JobInfo.Builder(jobId,
105                new ComponentName(context, ProvisionObserver.class))
106                .addTriggerContentUri(new JobInfo.TriggerContentUri(
107                        Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED), 0))
108                .setTriggerContentUpdateDelay(CONTENT_UPDATE_DELAY_MS)
109                .setTriggerContentMaxDelay(CONTENT_MAX_DELAY_MS)
110                .build();
111        jobScheduler.schedule(job);
112        return true;
113    }
114}
115