/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2014, Arnaud Roques
 *
 * Project Info:  http://plantuml.sourceforge.net
 * 
 * This file is part of PlantUML.
 *
 * Licensed under The MIT License (Massachusetts Institute of Technology License)
 * 
 * See http://opensource.org/licenses/MIT
 * 
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 *
 * Original Author:  Arnaud Roques
 */
package net.sourceforge.plantuml.command;

import java.util.List;
import java.util.regex.Matcher;

import net.sourceforge.plantuml.UmlDiagram;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.graphic.HorizontalAlignment;
import net.sourceforge.plantuml.StringUtils;

public class CommandMultilinesFooter extends CommandMultilines<UmlDiagram> {

	public CommandMultilinesFooter() {
		super("(?i)^(?:(left|right|center)?[%s]*)footer$");
	}

	@Override
	public String getPatternEnd() {
		return "(?i)^end[%s]?footer$";
	}

	public CommandExecutionResult execute(final UmlDiagram diagram, List<String> lines) {
		StringUtils.trim(lines, false);
		final Matcher m = getStartingPattern().matcher(lines.get(0).trim());
		if (m.find() == false) {
			throw new IllegalStateException();
		}
		final String align = m.group(1);
		if (align != null) {
			diagram.setFooterAlignment(HorizontalAlignment.valueOf(StringUtils.goUpperCase(align)));
		}
		final Display strings = Display.create(lines.subList(1, lines.size() - 1));
		if (strings.size() > 0) {
			diagram.setFooter(strings);
			return CommandExecutionResult.ok();
		}
		return CommandExecutionResult.error("Empty footer");
	}

}