001/*
002 *  Copyright 2016 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016
017package org.ametys.plugins.core.ui.resources.css.sass;
018
019import java.io.IOException;
020import java.util.Map;
021
022import org.apache.avalon.framework.parameters.Parameters;
023import org.apache.cocoon.ProcessingException;
024import org.apache.cocoon.ResourceNotFoundException;
025import org.apache.excalibur.source.Source;
026
027import org.ametys.core.resources.SimpleResourceHandler;
028
029/**
030 * Reader for uncompiled SASS files.
031 */
032public class UncompiledSassResourceHandler extends SimpleResourceHandler
033{
034    @Override
035    public Source setup(String location, Map objectModel, Parameters par, boolean readForDownload) throws ProcessingException, IOException
036    {
037        Source source = null;
038        // If the file exists at the original location, return it without any processing
039        
040        source = _getSource(location);
041        if (source == null)
042        {
043            int lastSlashIndex = location.lastIndexOf("/");
044            if (lastSlashIndex + 2 < location.length())
045            {
046                // Appends underscore to the beginning of the file name
047                String underscorelocation = location.substring(0, lastSlashIndex + 1) + "_" + location.substring(lastSlashIndex + 1);
048                source = _getSource(underscorelocation);
049            }
050        }
051        
052        if (source == null)
053        {
054            throw new ResourceNotFoundException("Resource not found for URI : " + location);
055        }
056        
057        _source = source;
058        return _source;
059    }
060
061    private Source _getSource(String location)
062    {
063        Source source = null;
064        try 
065        {
066            source = _resolver.resolveURI(location);
067        } 
068        catch (IOException e) 
069        {
070            // Nothing
071        }
072        
073        if (source == null || !source.exists())
074        {
075            _resolver.release(source);
076            return null;
077        }
078        
079        return source;
080    }
081
082    @Override
083    public String getMimeType()
084    {
085        return "text/css";
086    }
087}