ReportingPeriodValidation.java

package org.sigmah.server.handler.util;

/*
 * #%L
 * Sigmah
 * %%
 * Copyright (C) 2010 - 2016 URD
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.util.Calendar;

import org.sigmah.server.domain.ReportingPeriod;

/**
 * Validate a {@link ReportingPeriod}
 * 
 * @author Aurélien Ponçon
 * @author Maxime Lombard (mlombard@ideia.fr)
 */
public class ReportingPeriodValidation {

	/**
	 * This function is used to validate a {@link ReportingPeriod}. It verify if the period of the element is not too near
	 * of the limit of the month (in order to avoid timezone issues). If true, it modify the element.
	 * 
	 * @param period
	 *          the period to validate
	 * @return a boolean that indicates if the period was valid
	 */
	public static boolean validate(ReportingPeriod period) {
		Calendar cal1 = Calendar.getInstance();
		cal1.setTime(period.getDate1());

		Calendar cal2 = Calendar.getInstance();
		cal2.setTime(period.getDate2());

		if (cal1.get(Calendar.DATE) == 1 && cal2.get(Calendar.DATE) == cal2.getActualMaximum(Calendar.DATE)) {
			// Update old periods
			cal1.set(Calendar.DATE, 5);
			period.setDate1(cal1.getTime());

			cal2.set(Calendar.DATE, cal2.getActualMaximum(Calendar.DATE) - 5);
			period.setDate2(cal2.getTime());

			return false;
		} else if (cal1.get(Calendar.DATE) > 15) {
			// Update periods with a left shift on the month of the first date
			cal1.add(Calendar.MONTH, 1);
			cal1.set(Calendar.DATE, 5);
			period.setDate1(cal1.getTime());

			cal2.set(Calendar.DATE, cal2.getActualMaximum(Calendar.DATE) - 5);
			period.setDate2(cal2.getTime());

			return false;
		} else if (cal2.get(Calendar.DATE) < 15) {
			// Update periods with a right shift on the month of the second date
			cal2.add(Calendar.MONTH, -1);
			cal2.set(Calendar.DATE, cal2.getActualMaximum(Calendar.DATE) - 5);
			period.setDate2(cal2.getTime());

			cal1.set(Calendar.DATE, 5);
			period.setDate1(cal1.getTime());

			return false;
		} else {
			return true;
		}
	}
}