/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.commons.io.res.util;

import java.io.File;

import lucee.commons.io.res.Resource;
import lucee.commons.lang.StringUtil;
import lucee.runtime.engine.ThreadLocalPageContext;
import lucee.runtime.exp.ExpressionException;
import lucee.runtime.exp.PageException;
import lucee.runtime.exp.PageRuntimeException;
import lucee.runtime.op.Caster;
import lucee.runtime.type.UDF;

public class UDFFilter extends UDFFilterSupport implements ResourceAndResourceNameFilter {

	public UDFFilter(UDF udf) throws ExpressionException{
		super(udf);
	}
	
    public boolean accept(String path) {
    	args[0]=path;
    	try {
			return Caster.toBooleanValue(udf.call(ThreadLocalPageContext.get(), args, true));
			
		} 
    	catch (PageException e) {
			throw new PageRuntimeException(e);
		}
    }
    
    
    @Override
	public boolean accept(Resource file) {
    	return accept(file.getAbsolutePath());
    }

	@Override
	public boolean accept(Resource parent, String name) {
		String path=parent.getAbsolutePath();
		if(path.endsWith(File.separator)) path+=name;
		else path+=File.separator+name;
		return accept(path);
	}
	
    @Override
	public String toString() {
		return "UDFFilter:"+udf;
	}
	
	public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(Object filter) throws PageException	{
	   if(filter instanceof UDF)
		   return createResourceAndResourceNameFilter((UDF)filter);
	   return createResourceAndResourceNameFilter(Caster.toString(filter));
	}

	
	public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(UDF filter) throws PageException	{
		return new UDFFilter(filter);
	}

	public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(String pattern) {

		if( !StringUtil.isEmpty(pattern, true) )
	    	return new WildcardPatternFilter( pattern, "|" );

	    return null;
	}
}