LocaleUtil.java

/**
 * This file is part of alf.io.
 *
 * alf.io 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.
 *
 * alf.io 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 alf.io.  If not, see <http://www.gnu.org/licenses/>.
 */
package alfio.util;

import alfio.model.Ticket;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.servlet.support.RequestContextUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Locale;
import java.util.Optional;

public final class LocaleUtil {
    private LocaleUtil() {}

    public static Locale getTicketLanguage(Ticket t, HttpServletRequest request) {
        return Optional.ofNullable(t.getUserLanguage())
                .filter(StringUtils::isNotBlank)
                .map(Locale::forLanguageTag)
                .orElseGet(() -> RequestContextUtils.getLocale(request));
    }
}