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      1 /*
      2  * Copyright (C) 2015 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 
     17 package com.android.deskclock.data;
     18 
     19 import android.content.ContentResolver;
     20 import android.content.Context;
     21 import android.database.ContentObserver;
     22 import android.net.Uri;
     23 import android.os.Handler;
     24 import android.provider.Settings;
     25 
     26 import com.android.deskclock.data.DataModel.AlarmVolumeButtonBehavior;
     27 import com.android.deskclock.provider.Alarm;
     28 
     29 /**
     30  * All alarm data will eventually be accessed via this model.
     31  */
     32 final class AlarmModel {
     33 
     34     /** The model from which settings are fetched. */
     35     private final SettingsModel mSettingsModel;
     36 
     37     /** The uri of the default ringtone to play for new alarms; mirrors last selection. */
     38     private Uri mDefaultAlarmRingtoneUri;
     39 
     40     AlarmModel(Context context, SettingsModel settingsModel) {
     41         mSettingsModel = settingsModel;
     42 
     43         // Clear caches affected by system settings when system settings change.
     44         final ContentResolver cr = context.getContentResolver();
     45         final ContentObserver observer = new SystemAlarmAlertChangeObserver();
     46         cr.registerContentObserver(Settings.System.DEFAULT_ALARM_ALERT_URI, false, observer);
     47     }
     48 
     49     Uri getDefaultAlarmRingtoneUri() {
     50         if (mDefaultAlarmRingtoneUri == null) {
     51             mDefaultAlarmRingtoneUri = mSettingsModel.getDefaultAlarmRingtoneUri();
     52         }
     53 
     54         return mDefaultAlarmRingtoneUri;
     55     }
     56 
     57     void setDefaultAlarmRingtoneUri(Uri uri) {
     58         // Never set the silent ringtone as default; new alarms should always make sound by default.
     59         if (!Alarm.NO_RINGTONE_URI.equals(uri)) {
     60             mSettingsModel.setDefaultAlarmRingtoneUri(uri);
     61             mDefaultAlarmRingtoneUri = uri;
     62         }
     63     }
     64 
     65     long getAlarmCrescendoDuration() {
     66         return mSettingsModel.getAlarmCrescendoDuration();
     67     }
     68 
     69     AlarmVolumeButtonBehavior getAlarmVolumeButtonBehavior() {
     70         return mSettingsModel.getAlarmVolumeButtonBehavior();
     71     }
     72 
     73     int getAlarmTimeout() {
     74         return mSettingsModel.getAlarmTimeout();
     75     }
     76 
     77     int getSnoozeLength() {
     78         return mSettingsModel.getSnoozeLength();
     79     }
     80 
     81     /**
     82      * This receiver is notified when system settings change. Cached information built on
     83      * those system settings must be cleared.
     84      */
     85     private final class SystemAlarmAlertChangeObserver extends ContentObserver {
     86 
     87         private SystemAlarmAlertChangeObserver() {
     88             super(new Handler());
     89         }
     90 
     91         @Override
     92         public void onChange(boolean selfChange) {
     93             super.onChange(selfChange);
     94             mDefaultAlarmRingtoneUri = null;
     95         }
     96     }
     97 }