Gadgetbridge/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/AlarmUtils.java

package nodomain.freeyourgadget.gadgetbridge.util;

import android.support.annotation.NonNull;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import nodomain.freeyourgadget.gadgetbridge.GBApplication;
import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst;
import nodomain.freeyourgadget.gadgetbridge.entities.Alarm;
import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
import nodomain.freeyourgadget.gadgetbridge.entities.Device;
import nodomain.freeyourgadget.gadgetbridge.entities.User;
import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;

/**
 * Some utility methods for dealing with Alarms.
 */
public class AlarmUtils {
    /**
     * Creates an auto-generated (not user-configurable), non-recurring alarm. This alarm
     * may not be stored in the database. Some features are not available (e.g. device id, user id).
     * @param index
     * @param smartWakeup
     * @param calendar
     * @return
     */
    public static nodomain.freeyourgadget.gadgetbridge.model.Alarm createSingleShot(int index, boolean smartWakeup, Calendar calendar) {
        return new Alarm(-1, -1, index, true, smartWakeup, Alarm.ALARM_ONCE, calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE));
    }

    /**
     * Creates  a Calendar object representing the time of the given alarm (not taking the
     * day/date into account.
     * @param alarm
     * @return
     */
    public static Calendar toCalendar(nodomain.freeyourgadget.gadgetbridge.model.Alarm alarm) {
        Calendar result = Calendar.getInstance();
        Calendar now = Calendar.getInstance();
        result.set(Calendar.HOUR_OF_DAY, alarm.getHour());
        result.set(Calendar.MINUTE, alarm.getMinute());
        if (now.after(result) && alarm.getRepetition() == Alarm.ALARM_ONCE) {
            //if the alarm is in the past set it to tomorrow
            result.add(Calendar.DATE, 1);
        }
        return result;
    }

    /**
     * Returns a repetition mask suitable for {@link Alarm#repetition}
     * @param mon whether the alarm shall repeat every Monday
     * @param tue whether the alarm shall repeat every Tuesday
     * @param wed whether the alarm shall repeat every Wednesday
     * @param thu whether the alarm shall repeat every Thursday
     * @param fri whether the alarm shall repeat every Friday
     * @param sat whether the alarm shall repeat every Saturday
     * @param sun whether the alarm shall repeat every Sunday
     * @return the created repetition mask
     */
    public static int createRepetitionMassk(boolean mon, boolean tue, boolean wed, boolean thu, boolean fri, boolean sat, boolean sun) {
        int repetitionMask = (mon ? Alarm.ALARM_MON : 0) |
                (tue ? Alarm.ALARM_TUE : 0) |
                (wed ? Alarm.ALARM_WED : 0) |
                (thu ? Alarm.ALARM_THU : 0) |
                (fri ? Alarm.ALARM_FRI : 0) |
                (sat ? Alarm.ALARM_SAT : 0) |
                (sun ? Alarm.ALARM_SUN : 0);
        return repetitionMask;
    }

    /**
     * Just for backward compatibility, do not call in new code.
     * @param gbDevice
     * @return
     * @deprecated use {@link DBHelper#getAlarms(GBDevice)} instead
     */
    @NonNull
    public static List<Alarm> readAlarmsFromPrefs(GBDevice gbDevice) {
        Prefs prefs = GBApplication.getPrefs();
        Set<String> stringAlarms = prefs.getStringSet(MiBandConst.PREF_MIBAND_ALARMS, new HashSet<String>());
        List<Alarm> alarms = new ArrayList<>(stringAlarms.size());

        try {
            DBHandler db = GBApplication.acquireDB();
            DaoSession daoSession = db.getDaoSession();
            User user = DBHelper.getUser(daoSession);
            Device device = DBHelper.getDevice(gbDevice, daoSession);
            for (String stringAlarm : stringAlarms) {
                alarms.add(createAlarmFromPreference(stringAlarm, device, user));
            }
            Collections.sort(alarms, AlarmUtils.createComparator());
            return alarms;
        } catch (Exception e) {
            GB.log("Error accessing database", GB.ERROR, e);
            return Collections.emptyList();
        }
    }

    private static Alarm createAlarmFromPreference(String fromPreferences, Device device, User user) {
        String[] tokens = fromPreferences.split(",");
        int index = Integer.parseInt(tokens[0]);
        boolean enabled = Boolean.parseBoolean(tokens[1]);
        boolean smartWakeup = Boolean.parseBoolean(tokens[2]);
        int repetition = Integer.parseInt(tokens[3]);
        int hour = Integer.parseInt(tokens[4]);
        int minute = Integer.parseInt(tokens[5]);

        return new Alarm(device.getId(), user.getId(), index, enabled, smartWakeup, repetition, hour, minute);
    }

    private static Comparator<Alarm> createComparator() {
        return new Comparator<Alarm>() {

            @Override
            public int compare(Alarm o1, Alarm o2) {
                int p1 = o1.getPosition();
                int p2 = o2.getPosition();

                return Integer.compare(p1, p2);
            }
        };
    }
}