/* 
 *  Copyright (C) 2000 - 2015 aw2.0 Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD is 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 OpenBD.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://openbd.org/
 */

package com.naryx.tagfusion.expression.function.ext;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

import com.naryx.tagfusion.cfm.engine.cfArrayData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfEngine;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStringData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.tag.cfTag;
import com.naryx.tagfusion.expression.function.functionBase;

public class getSupportedTags extends functionBase {

	private static final long serialVersionUID = 1L;

	public getSupportedTags() {
		min = 0;
		max = 1;
	}

	public String[] getParamInfo() {
		return new String[] { "Category of tag to filter on" };
	}

	public Map<String, String> getInfo() {
		return makeInfo("engine", "Returns back all the core tags, optionally filtered on the given category", ReturnType.ARRAY);
	}

	public cfData execute(cfSession _session, List<cfData> parameters) throws cfmRunTimeException {
		String category = null;
		if (parameters.size() == 1)
			category = parameters.get(0).getString().toLowerCase().trim();

		cfArrayData arrData = cfArrayData.createArray(1);
		List<String> HT = cfEngine.thisInstance.TagChecker.getSupportedTags();
		Iterator<String> it = HT.iterator();

		if (category == null || category.length() == 0) {

			while (it.hasNext()) {
				arrData.addElement(new cfStringData(it.next().toUpperCase()));
			}

		} else {

			while (it.hasNext()) {
				String tagName = it.next();

				cfTag tag = null;
				try {
					Class<?> C = Class.forName(cfEngine.thisInstance.TagChecker.getClass(tagName));
					tag = (cfTag) C.newInstance();

					if (tag.getInfo().get("category").equals(category)) {
						arrData.addElement(new cfStringData(tagName));
					}

				} catch (Exception e) {
				}
			}

		}

		// Need to sort array
		arrData.sortArray("text", "asc");
		return arrData;
	}
}