/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2023, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * http://plantuml.com/patreon (only 1$ per month!)
 * http://plantuml.com/paypal
 * 
 * This file is part of PlantUML.
 *
 * PlantUML 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.
 *
 * PlantUML 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.compositediagram.command;

import net.sourceforge.plantuml.baraye.EntityImp;
import net.sourceforge.plantuml.baraye.Quark;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.command.regex.IRegex;
import net.sourceforge.plantuml.command.regex.RegexConcat;
import net.sourceforge.plantuml.command.regex.RegexLeaf;
import net.sourceforge.plantuml.command.regex.RegexOptional;
import net.sourceforge.plantuml.command.regex.RegexResult;
import net.sourceforge.plantuml.compositediagram.CompositeDiagram;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.cucadiagram.LeafType;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandCreateBlock extends SingleLineCommand2<CompositeDiagram> {

	public CommandCreateBlock() {
		super(getRegexConcat());
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandCreateBlock.class.getName(), RegexLeaf.start(), //
				new RegexLeaf("block"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexOptional( //
						new RegexConcat( //
								new RegexLeaf("DISPLAY", "[%g]([^%g]+)[%g]"), //
								RegexLeaf.spaceOneOrMore(), //
								new RegexLeaf("as"), //
								RegexLeaf.spaceOneOrMore() //
						)), //
				new RegexLeaf("CODE", "([%pLN_.]+)"), RegexLeaf.end()); //
	}

	@Override
	protected CommandExecutionResult executeArg(CompositeDiagram diagram, LineLocation location, RegexResult arg) {
		String display = arg.get("DISPLAY", 0);
		final String idShort = arg.get("CODE", 0);
		final Quark quark = diagram.quarkInContext(idShort, false);
		if (display == null)
			display = quark.getName();

		if (quark.getData() != null)
			return CommandExecutionResult.error("Already exists " + quark.getName());

		final EntityImp ent = diagram.reallyCreateLeaf(quark, Display.getWithNewlines(quark), LeafType.BLOCK, null);
		// ent.setDisplay(Display.getWithNewlines(display));
		return CommandExecutionResult.ok();
	}

}