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package com.openexchange.data.conversion.ical.ical4j.internal.appointment;

import java.util.List;
import java.util.TimeZone;
import net.fortuna.ical4j.model.DateList;
import net.fortuna.ical4j.model.PropertyList;
import net.fortuna.ical4j.model.component.VEvent;
import net.fortuna.ical4j.model.property.ExDate;
import com.openexchange.data.conversion.ical.ConversionError;
import com.openexchange.data.conversion.ical.ConversionWarning;
import com.openexchange.data.conversion.ical.ical4j.internal.AbstractVerifyingAttributeConverter;
import com.openexchange.data.conversion.ical.ical4j.internal.EmitterTools;
import com.openexchange.data.conversion.ical.ical4j.internal.ParserTools;
import com.openexchange.groupware.calendar.CalendarDataObject;
import com.openexchange.groupware.container.Appointment;
import com.openexchange.groupware.contexts.Context;

/**
 * @author Francisco Laguna <francisco.laguna@open-xchange.com>
 */
public class DeleteExceptions extends AbstractVerifyingAttributeConverter<VEvent, Appointment> {

    /**
     * Default constructor.
     */
    public DeleteExceptions() {
        super();
    }
    
    public boolean isSet(final Appointment appointment) {
        return appointment.isMaster() && appointment.containsDeleteExceptions();
    }

    public void emit(final int index, final Appointment appointment, final VEvent vEvent, final List<ConversionWarning> warnings, final Context ctx, final Object... args) throws ConversionError {
        final java.util.Date[] dates = appointment.getDeleteException();
        if (null == dates) {
            return;
        }
        // Only when the DateList is created this way the correct dates are written to iCal file.
        final DateList deleteExceptions = new DateList(dates.length);
        deleteExceptions.setUtc(true);
        for (final java.util.Date deleteException : dates) {
            final net.fortuna.ical4j.model.Date date;
            if (CalendarDataObject.class.isAssignableFrom(appointment.getClass())) {
                final CalendarDataObject cloned = (CalendarDataObject) appointment.clone();
                date = EmitterTools.toDateTime(EmitterTools.calculateExactTime(cloned, deleteException));
            } else {
                date = EmitterTools.toDateTime(deleteException);
            }
            deleteExceptions.add(date);
        }
        final ExDate exDates = new ExDate(deleteExceptions);
        vEvent.getProperties().add(exDates);
    }

    public boolean hasProperty(final VEvent vEvent) {
        return null != vEvent.getProperty("EXDATE");
    }

    public void parse(final int index, final VEvent vEvent, final Appointment appointment, final TimeZone timeZone, final Context ctx, final List<ConversionWarning> warnings) throws ConversionError {
        final PropertyList exdates = vEvent.getProperties("EXDATE");
        final int size = exdates.size();
        for (int i = 0; i < size; i++) {
            final ExDate exdate = (ExDate) exdates.get(0);

            final DateList dates = exdate.getDates();
            final int size2 = dates.size();
            for (int j = 0; j < size2; j++) {
                final net.fortuna.ical4j.model.Date icaldate = (net.fortuna.ical4j.model.Date) dates.get(j);
                final java.util.Date date = ParserTools.recalculateAsNeeded(icaldate, exdate, timeZone);
                appointment.addDeleteException(date);
            }
        }
    }
}
