/*****************************************************************************
 * Copyright (c) 2019 CEA LIST.
 *
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *  Xavier Le Pallec (for CEA LIST) xlepallec@lilo.org - Bug 558456
 *
 *****************************************************************************/

package org.eclipse.papyrus.uml.diagram.clazz.lf.classtextualedition.webpages;

/**
 * This class is dedicated to load a web page and replacing the loading
 * mechanisms of a web page by those of {@link ResourceAccessUtils} class.
 *
 */
public class HtmlPage {

	private static HtmlPage instance;

	private HtmlPage() {
		// to prevent instantiation
	}

	public static HtmlPage getInstance() {
		if (instance == null) {
			instance = new HtmlPage();
		}
		return instance;

	}

	/**
	 * This static method is used to load a head html file, a list of css files, a
	 * list of (java)scripts and a body html file. The loading mechanisms of a web
	 * page (like script tag) are not possible when dealing with a jar.
	 * 
	 * @param headFileName
	 *            head html file
	 * @param cssFileNames
	 *            a list of css files
	 * @param scriptsFileNames
	 *            a list of (java)scripts
	 * @param bodyFileName
	 *            a body html file
	 * @return the html string/page
	 */
	public String createHtmlContentFromHeadScriptBody(String headFileName, String[] cssFileNames,
			String[] scriptsFileNames, String bodyFileName) {

		String htmlContent = ""; //$NON-NLS-1$
		htmlContent += ResourceAccessUtils.getInstance().getContentOfFileLocatedInTheJar(headFileName);

		for (String cssFileName : cssFileNames)
			htmlContent += "<style>" + ResourceAccessUtils.getInstance().getContentOfFileLocatedInTheJar(cssFileName) + "</style>"; //$NON-NLS-1$ //$NON-NLS-2$

		for (String scriptFileName : scriptsFileNames)
			htmlContent += "<script>" + ResourceAccessUtils.getInstance().getContentOfFileLocatedInTheJar(scriptFileName) + "</script>"; //$NON-NLS-1$ //$NON-NLS-2$
		htmlContent += ResourceAccessUtils.getInstance().getContentOfFileLocatedInTheJar(bodyFileName);
		return htmlContent;
	}
}