1/*
2 * Copyright (C) 2013 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.cellbroadcastreceiver;
18
19import android.app.AlarmManager;
20import android.app.PendingIntent;
21import android.app.Service;
22import android.content.Context;
23import android.content.Intent;
24import android.content.SharedPreferences;
25import android.media.Ringtone;
26import android.media.RingtoneManager;
27import android.net.Uri;
28import android.os.IBinder;
29import android.os.SystemClock;
30import android.preference.PreferenceManager;
31import android.util.Log;
32
33import static com.android.cellbroadcastreceiver.CellBroadcastReceiver.DBG;
34
35/**
36 * Manages alert reminder notification.
37 */
38public class CellBroadcastAlertReminder extends Service {
39    private static final String TAG = "CellBroadcastAlertReminder";
40
41    /** Action to wake up and play alert reminder sound. */
42    static final String ACTION_PLAY_ALERT_REMINDER = "ACTION_PLAY_ALERT_REMINDER";
43
44    /**
45     * Pending intent for alert reminder. This is static so that we don't have to start the
46     * service in order to cancel any pending reminders when user dismisses the alert dialog.
47     */
48    private static PendingIntent sPlayReminderIntent;
49
50    /**
51     * Alert reminder for current ringtone being played.
52     */
53    private static Ringtone sPlayReminderRingtone;
54
55    @Override
56    public IBinder onBind(Intent intent) {
57        return null;
58    }
59
60    @Override
61    public int onStartCommand(Intent intent, int flags, int startId) {
62        // No intent or unrecognized action; tell the system not to restart us.
63        if (intent == null || !ACTION_PLAY_ALERT_REMINDER.equals(intent.getAction())) {
64            stopSelf();
65            return START_NOT_STICKY;
66        }
67
68        log("playing alert reminder");
69        playAlertReminderSound();
70
71        if (queueAlertReminder(this, false)) {
72            return START_STICKY;
73        } else {
74            log("no reminders queued");
75            stopSelf();
76            return START_NOT_STICKY;
77        }
78    }
79
80    /**
81     * Use the RingtoneManager to play the alert reminder sound.
82     */
83    private void playAlertReminderSound() {
84        Uri notificationUri = RingtoneManager.getDefaultUri(
85                RingtoneManager.TYPE_NOTIFICATION | RingtoneManager.TYPE_ALARM);
86        if (notificationUri == null) {
87            loge("Can't get URI for alert reminder sound");
88            return;
89        }
90        Ringtone r = RingtoneManager.getRingtone(this, notificationUri);
91        if (r != null) {
92            log("playing alert reminder sound");
93            r.play();
94        } else {
95            loge("can't get Ringtone for alert reminder sound");
96        }
97    }
98
99    /**
100     * Helper method to start the alert reminder service to queue the alert reminder.
101     * @return true if a pending reminder was set; false if there are no more reminders
102     */
103    static boolean queueAlertReminder(Context context, boolean firstTime) {
104        // Stop any alert reminder sound and cancel any previously queued reminders.
105        cancelAlertReminder();
106
107        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
108        String prefStr = prefs.getString(CellBroadcastSettings.KEY_ALERT_REMINDER_INTERVAL, null);
109
110        if (prefStr == null) {
111            if (DBG) log("no preference value for alert reminder");
112            return false;
113        }
114
115        int interval;
116        try {
117            interval = Integer.valueOf(prefStr);
118        } catch (NumberFormatException ignored) {
119            loge("invalid alert reminder interval preference: " + prefStr);
120            return false;
121        }
122
123        if (interval == 0 || (interval == 1 && !firstTime)) {
124            return false;
125        }
126        if (interval == 1) {
127            interval = 2;   // "1" = one reminder after 2 minutes
128        }
129
130        if (DBG) log("queueAlertReminder() in " + interval + " minutes");
131
132        Intent playIntent = new Intent(context, CellBroadcastAlertReminder.class);
133        playIntent.setAction(ACTION_PLAY_ALERT_REMINDER);
134        sPlayReminderIntent = PendingIntent.getService(context, 0, playIntent,
135                PendingIntent.FLAG_UPDATE_CURRENT);
136
137        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
138        if (alarmManager == null) {
139            loge("can't get Alarm Service");
140            return false;
141        }
142
143        // remind user after 2 minutes or 15 minutes
144        long triggerTime = SystemClock.elapsedRealtime() + (interval * 60000);
145        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerTime, sPlayReminderIntent);
146        return true;
147    }
148
149    /**
150     * Stops alert reminder and cancels any queued reminders.
151     */
152    static void cancelAlertReminder() {
153        if (DBG) log("cancelAlertReminder()");
154        if (sPlayReminderRingtone != null) {
155            if (DBG) log("stopping play reminder ringtone");
156            sPlayReminderRingtone.stop();
157            sPlayReminderRingtone = null;
158        }
159        if (sPlayReminderIntent != null) {
160            if (DBG) log("canceling pending play reminder intent");
161            sPlayReminderIntent.cancel();
162            sPlayReminderIntent = null;
163        }
164    }
165
166    private static void log(String msg) {
167        Log.d(TAG, msg);
168    }
169
170    private static void loge(String msg) {
171        Log.e(TAG, msg);
172    }
173}
174