1/*
2 * Copyright (C) 2014 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.systemui.statusbar.policy;
18
19import android.app.AlarmManager;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.os.UserHandle;
25
26import java.io.FileDescriptor;
27import java.io.PrintWriter;
28import java.util.ArrayList;
29
30public class NextAlarmController extends BroadcastReceiver {
31
32    private final ArrayList<NextAlarmChangeCallback> mChangeCallbacks = new ArrayList<>();
33
34    private AlarmManager mAlarmManager;
35    private AlarmManager.AlarmClockInfo mNextAlarm;
36
37    public NextAlarmController(Context context) {
38        mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
39        IntentFilter filter = new IntentFilter();
40        filter.addAction(Intent.ACTION_USER_SWITCHED);
41        filter.addAction(AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED);
42        context.registerReceiverAsUser(this, UserHandle.ALL, filter, null, null);
43        updateNextAlarm();
44    }
45
46    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
47        pw.println("NextAlarmController state:");
48        pw.print("  mNextAlarm="); pw.println(mNextAlarm);
49    }
50
51    public void addStateChangedCallback(NextAlarmChangeCallback cb) {
52        mChangeCallbacks.add(cb);
53        cb.onNextAlarmChanged(mNextAlarm);
54    }
55
56    public void removeStateChangedCallback(NextAlarmChangeCallback cb) {
57        mChangeCallbacks.remove(cb);
58    }
59
60    public void onReceive(Context context, Intent intent) {
61        final String action = intent.getAction();
62        if (action.equals(Intent.ACTION_USER_SWITCHED)
63                || action.equals(AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED)) {
64            updateNextAlarm();
65        }
66    }
67
68    private void updateNextAlarm() {
69        mNextAlarm = mAlarmManager.getNextAlarmClock(UserHandle.USER_CURRENT);
70        fireNextAlarmChanged();
71    }
72
73    private void fireNextAlarmChanged() {
74        int n = mChangeCallbacks.size();
75        for (int i = 0; i < n; i++) {
76            mChangeCallbacks.get(i).onNextAlarmChanged(mNextAlarm);
77        }
78    }
79
80    public interface NextAlarmChangeCallback {
81        void onNextAlarmChanged(AlarmManager.AlarmClockInfo nextAlarm);
82    }
83}
84