source: trunk/hiptop/pester/net/sabi/pester/Alarms.java@ 259

package net.sabi.pester;

import java.util.Comparator;
import danger.app.Application;
import danger.app.DataStore;
import danger.app.Event;
import danger.app.SettingsDB;
import danger.app.SettingsDBException;
import danger.internal.Date;
import danger.util.StdActiveList;

public class Alarms extends StdActiveList {
    // max # records in a datastore
    private static final int MAX_ALARM_COUNT = 50;

    private static Alarms sAlarmList = null;
    private static Listener sListener;
    private static SettingsDB sSettingsDB;

    private DataStore mDataStore;

    private Alarms() {
        mDataStore = DataStore.createDataStore("alarms", true /* auto sync */);
    }

    public static Alarms getList() {
        if (sAlarmList == null) {
            sAlarmList = new Alarms();
            sListener = new Listener();
            sSettingsDB = new SettingsDB("settings", true /* auto sync */);
            Application.registerForEvent(sListener, Event.EVENT_TIME_CHANGED);
        }
        return sAlarmList;
    }

    public static void addAlarm(Alarm alarm) {
        sAlarmList.insertItemSorted(alarm, alarm);
    }
    public static void removeAlarm(Alarm alarm) {
        sAlarmList.removeItem(alarm);
    }

    private static String KEY_DEFAULT_ALARM = "default alarm";

    public static Alarm getDefaultAlarm() {
        Alarm defaultAlarm = new Alarm();
        try {
            defaultAlarm.fromByteArray(sSettingsDB.getBytes(KEY_DEFAULT_ALARM));
        } catch (SettingsDBException e) {
            defaultAlarm = new Alarm();
            defaultAlarm.setDate(new Date());
            defaultAlarm.setPeriod(600, false);
        }
        return defaultAlarm;
    }
    public static void setDefaultAlarm(Alarm alarm) {
        sSettingsDB.setBytes(KEY_DEFAULT_ALARM, alarm.toByteArray());
    }

    static class Listener extends danger.app.Listener
        implements danger.util.ActiveList.ForEach {
        
        public void receive(Object item) {
            ((Alarm)item).timeChanged();
        }

        public boolean receiveEvent(Event e) {
            if (e.type == Event.EVENT_TIME_CHANGED) {
                // XXX do we get this when the time zone changes?
                Alarms.getList().forEach(this);
                return true;
            }
            return super.receiveEvent(e);
        }
    }
}