MonthMondayDaysProvider.java

/**
 * Copyright © 2002 Instituto Superior Técnico
 *
 * This file is part of FenixEdu Academic.
 *
 * FenixEdu Academic is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FenixEdu Academic is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with FenixEdu Academic.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fenixedu.academic.ui.renderers.providers.spaceManager;

import java.util.ArrayList;
import java.util.List;

import org.fenixedu.academic.domain.Lesson;
import org.fenixedu.academic.dto.spaceManager.ViewEventSpaceOccupationsBean;
import org.joda.time.DateTimeFieldType;
import org.joda.time.Partial;
import org.joda.time.YearMonthDay;

import pt.ist.fenixWebFramework.renderers.DataProvider;
import pt.ist.fenixWebFramework.renderers.components.converters.Converter;

public class MonthMondayDaysProvider implements DataProvider {

    private static int MONDAY_IN_JODA_TIME = 1;

    @Override
    public Object provide(Object source, Object currentValue) {

        List<YearMonthDay> result = new ArrayList<YearMonthDay>();
        ViewEventSpaceOccupationsBean bean = (ViewEventSpaceOccupationsBean) source;
        Partial year = bean.getYear();
        Partial month = bean.getMonth();

        if (month != null && year != null) {

            int monthNumber = month.get(DateTimeFieldType.monthOfYear());
            int yearNumber = year.get(DateTimeFieldType.year());

            YearMonthDay firstDayOfMonth = new YearMonthDay(yearNumber, monthNumber, 1);
            YearMonthDay monday = firstDayOfMonth.toDateTimeAtMidnight().withDayOfWeek(MONDAY_IN_JODA_TIME).toYearMonthDay();

            if ((monday.getMonthOfYear() < monthNumber) || (monday.getYear() < yearNumber)) {
                monday = monday.plusDays(Lesson.NUMBER_OF_DAYS_IN_WEEK);
            }

            while (monday.getMonthOfYear() == monthNumber) {
                result.add(monday);
                monday = monday.plusDays(Lesson.NUMBER_OF_DAYS_IN_WEEK);
            }
        }

        return result;
    }

    @Override
    public Converter getConverter() {
        return null;
    }
}