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PlantUML is a component that allows to quickly write : * sequence diagram, * use case diagram, * class diagram, * activity diagram, * component diagram, * state diagram * object diagram

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://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.preproc;

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

public class Variables {

	private final List all = new ArrayList<>();
	private final String fonctionName;
	private final String definitionQuoted;

	public Variables(String fonctionName, String definitionQuoted) {
		this.fonctionName = fonctionName;
		this.definitionQuoted = definitionQuoted;
	}

	public void add(DefineVariable var) {
		this.all.add(var);
	}

	public int countDefaultValue() {
		int result = 0;
		for (DefineVariable var : all) {
			if (var.getDefaultValue() != null) {
				result++;
			}
		}
		return result;
	}

	public Variables removeSomeDefaultValues(int nb) {
		if (nb == 0) {
			return this;
		}
		final Variables result = new Variables(fonctionName, definitionQuoted);
		for (DefineVariable v : all) {
			if (v.getDefaultValue() != null && nb > 0) {
				result.add(v.removeDefault());
				nb--;
			} else {
				result.add(v);
			}
		}
		if (nb != 0) {
			throw new IllegalArgumentException();
		}
		return result;
	}

	private String newValue;
	private Pattern regex2;

	public String applyOn(String line) {
		if (newValue == null) {
			newValue = definitionQuoted;
			final StringBuilder regex = new StringBuilder("\\b" + fonctionName + "\\(");

			final List variables = all;
			boolean appended = false;
			for (int j = 0; j < variables.size(); j++) {
				final DefineVariable variable = variables.get(j);
				final String varName = variable.getName();
				final String var2 = "(##" + varName + "##)|(##" + varName + "\\b)|(\\b" + varName + "##)|(\\b" + varName
						+ "\\b)";
				if (variable.getDefaultValue() == null) {
					regex.append("(?:(?:\\s*\"([^\"]*)\"\\s*)|(?:\\s*'([^']*)'\\s*)|\\s*"
							+ "((?:\\([^()]*\\)|[^,'\"])*?)" + ")");
					final int i = 1 + 3 * j;
					newValue = newValue.replaceAll(var2, "\\$" + i + "\\$" + (i + 1) + "\\$" + (i + 2));
					regex.append(",");
					appended = true;
				} else {
					newValue = newValue.replaceAll(var2, Matcher.quoteReplacement(variable.getDefaultValue()));
				}
			}
			if (appended == true) {
				regex.setLength(regex.length() - 1);
			}
			regex.append("\\)");
			regex2 = Pattern.compile(regex.toString());
		}
		// line = line.replaceAll(regex.toString(), newValue);
		line = regex2.matcher(line).replaceAll(newValue);
		return line;
	}

}