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PlantUML is a component that allows to quickly write diagrams from text.
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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * Project Info:  https://plantuml.com
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 * If you like this project or if you find it useful, you can support us at:
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 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the Apache Software License.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
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 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
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 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this APACHE license.
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 * The generated images can then be used without any reference to the APACHE license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
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 * There is an exception : if the textual description in PlantUML language is also covered
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 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
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 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
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 *
 */
package net.sourceforge.plantuml.ebnf;

import java.util.Collections;

import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.klimt.color.NoSuchColorException;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexOptional;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.text.StringLocated;
import net.sourceforge.plantuml.utils.BlocLines;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandEBnfSingleLine extends SingleLineCommand2 {

	public CommandEBnfSingleLine() {
		super(true, getRegexConcat());
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandEBnfSingleLine.class.getName(), RegexLeaf.start(), //

				new RegexOptional( //
						new RegexConcat( //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("\\(\\*"), //
								new RegexLeaf("COMMENTA", "(.*[^%s].*)"), //
								new RegexLeaf("\\*\\)"), //
								RegexLeaf.spaceZeroOrMore())), //

				new RegexLeaf("ID", "(\\w[-\\w]*)"), //

				new RegexOptional( //
						new RegexConcat( //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("\\(\\*"), //
								new RegexLeaf("COMMENTB", "(.*[^%s].*)"), //
								new RegexLeaf("\\*\\)"), //
								RegexLeaf.spaceZeroOrMore())), //

				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("EQUALS", "(=)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("LINE", "(.*;)"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(PSystemEbnf diagram, LineLocation location, RegexResult arg)
			throws NoSuchColorException {
		final String id = arg.get("ID", 0);
		final String equals = arg.get("EQUALS", 0);
		final String line = arg.get("LINE", 0);
		final String full = id + equals + line;

		final String commentAbove = arg.get("COMMENTA", 0);
		final String commentBelow = arg.get("COMMENTB", 0);

		final StringLocated string = new StringLocated(full, location);
		return diagram.addBlocLines(BlocLines.from(Collections.singletonList(string)), commentAbove, commentBelow);
	}
}