1/*
2 * Copyright (C) 2009 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.phone;
18
19import android.app.Notification;
20import android.app.NotificationManager;
21import android.app.PendingIntent;
22import android.app.Service;
23import android.content.BroadcastReceiver;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.content.res.Resources;
28import android.os.AsyncResult;
29import android.os.Binder;
30import android.os.CountDownTimer;
31import android.os.Handler;
32import android.os.IBinder;
33import android.os.Message;
34import android.os.SystemProperties;
35import android.util.Log;
36
37import com.android.internal.telephony.cdma.CDMAPhone;
38import com.android.internal.telephony.Phone;
39import com.android.internal.telephony.PhoneConstants;
40import com.android.internal.telephony.PhoneFactory;
41import com.android.internal.telephony.TelephonyIntents;
42import com.android.internal.telephony.TelephonyProperties;
43
44/**
45 * Application service that inserts/removes Emergency Callback Mode notification and
46 * updates Emergency Callback Mode countdown clock in the notification
47 *
48 * @see EmergencyCallbackModeExitDialog
49 */
50public class EmergencyCallbackModeService extends Service {
51
52    // Default Emergency Callback Mode timeout value
53    private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
54    private static final String LOG_TAG = "EmergencyCallbackModeService";
55
56    private NotificationManager mNotificationManager = null;
57    private CountDownTimer mTimer = null;
58    private long mTimeLeft = 0;
59    private Phone mPhone = null;
60    private boolean mInEmergencyCall = false;
61
62    private static final int ECM_TIMER_RESET = 1;
63
64    private Handler mHandler = new Handler () {
65        public void handleMessage(Message msg) {
66            switch (msg.what) {
67                case ECM_TIMER_RESET:
68                    resetEcmTimer((AsyncResult) msg.obj);
69                    break;
70            }
71        }
72    };
73
74    @Override
75    public void onCreate() {
76        // Check if it is CDMA phone
77        if (PhoneFactory.getDefaultPhone().getPhoneType() != PhoneConstants.PHONE_TYPE_CDMA) {
78            Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " +
79                    PhoneFactory.getDefaultPhone().getPhoneName() + " phones");
80            stopSelf();
81        }
82
83        // Register receiver for intents
84        IntentFilter filter = new IntentFilter();
85        filter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
86        filter.addAction(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS);
87        registerReceiver(mEcmReceiver, filter);
88
89        mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
90
91        // Register ECM timer reset notfication
92        mPhone = PhoneFactory.getDefaultPhone();
93        mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
94
95        startTimerNotification();
96    }
97
98    @Override
99    public void onDestroy() {
100        // Unregister receiver
101        unregisterReceiver(mEcmReceiver);
102        // Unregister ECM timer reset notification
103        mPhone.unregisterForEcmTimerReset(mHandler);
104
105        // Cancel the notification and timer
106        mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
107        mTimer.cancel();
108    }
109
110    /**
111     * Listens for Emergency Callback Mode intents
112     */
113    private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
114        @Override
115        public void onReceive(Context context, Intent intent) {
116            // Stop the service when phone exits Emergency Callback Mode
117            if (intent.getAction().equals(
118                    TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
119                if (intent.getBooleanExtra("phoneinECMState", false) == false) {
120                    stopSelf();
121                }
122            }
123            // Show dialog box
124            else if (intent.getAction().equals(
125                    TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
126                    context.startActivity(
127                            new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
128                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
129            }
130        }
131    };
132
133    /**
134     * Start timer notification for Emergency Callback Mode
135     */
136    private void startTimerNotification() {
137        // Get Emergency Callback Mode timeout value
138        long ecmTimeout = SystemProperties.getLong(
139                    TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
140
141        // Show the notification
142        showNotification(ecmTimeout);
143
144        // Start countdown timer for the notification updates
145        mTimer = new CountDownTimer(ecmTimeout, 1000) {
146
147            @Override
148            public void onTick(long millisUntilFinished) {
149                mTimeLeft = millisUntilFinished;
150                EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
151            }
152
153            @Override
154            public void onFinish() {
155                //Do nothing
156            }
157
158        }.start();
159    }
160
161    /**
162     * Shows notification for Emergency Callback Mode
163     */
164    private void showNotification(long millisUntilFinished) {
165
166        // Set the icon and text
167        Notification notification = new Notification(
168                R.drawable.picture_emergency25x25,
169                getText(R.string.phone_entered_ecm_text), 0);
170
171        // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
172        // this notification
173        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
174                new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
175
176        // Format notification string
177        String text = null;
178        if(mInEmergencyCall) {
179            text = getText(R.string.phone_in_ecm_call_notification_text).toString();
180        } else {
181            int minutes = (int)(millisUntilFinished / 60000);
182            String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
183            text = String.format(getResources().getQuantityText(
184                     R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
185        }
186        // Set the info in the notification
187        notification.setLatestEventInfo(this, getText(R.string.phone_in_ecm_notification_title),
188                text, contentIntent);
189
190        notification.flags = Notification.FLAG_ONGOING_EVENT;
191
192        // Show notification
193        mNotificationManager.notify(R.string.phone_in_ecm_notification_title, notification);
194    }
195
196    /**
197     * Handle ECM_TIMER_RESET notification
198     */
199    private void resetEcmTimer(AsyncResult r) {
200        boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
201
202        if (isTimerCanceled) {
203            mInEmergencyCall = true;
204            mTimer.cancel();
205            showNotification(0);
206        } else {
207            mInEmergencyCall = false;
208            startTimerNotification();
209        }
210    }
211
212    @Override
213    public IBinder onBind(Intent intent) {
214        return mBinder;
215    }
216
217    // This is the object that receives interactions from clients.
218    private final IBinder mBinder = new LocalBinder();
219
220    /**
221     * Class for clients to access
222     */
223    public class LocalBinder extends Binder {
224        EmergencyCallbackModeService getService() {
225            return EmergencyCallbackModeService.this;
226        }
227    }
228
229    /**
230     * Returns Emergency Callback Mode timeout value
231     */
232    public long getEmergencyCallbackModeTimeout() {
233        return mTimeLeft;
234    }
235
236    /**
237     * Returns Emergency Callback Mode call state
238     */
239    public boolean getEmergencyCallbackModeCallState() {
240        return mInEmergencyCall;
241    }
242}
243