package com.armedia.acm.services.templateconfiguration.model;

/*-
 * #%L
 * ACM Service: Notification
 * %%
 * Copyright (C) 2014 - 2018 ArkCase LLC
 * %%
 * This file is part of the ArkCase software. 
 * 
 * If the software was purchased under a paid ArkCase license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * ArkCase 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.
 *  
 * ArkCase 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 ArkCase. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAccessor;
import java.util.List;

import freemarker.ext.beans.StringModel;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModelEx;
import freemarker.template.TemplateModelException;

public class FormatDateTimeMethodModel implements TemplateMethodModelEx
{

    @Override
    public Object exec(List args) throws TemplateModelException
    {
        if (args.size() != 2)
        {
            throw new TemplateModelException("Wrong arguments");
        }
        if (args.get(0) == null)
        {
            return null;
        }
        TemporalAccessor time = (TemporalAccessor) ((StringModel) args.get(0)).getWrappedObject();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(((SimpleScalar) args.get(1)).getAsString());
        return formatter.format(time);
    }
}
