001/*
002 *  Copyright 2018 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 */
016package org.ametys.plugins.core.ui.minimize.css;
017
018import java.io.IOException;
019import java.util.List;
020
021import org.apache.avalon.framework.service.ServiceException;
022import org.apache.avalon.framework.service.ServiceManager;
023import org.apache.cocoon.ProcessingException;
024import org.apache.commons.io.IOUtils;
025import org.apache.excalibur.source.Source;
026import org.xml.sax.SAXException;
027
028import org.ametys.core.minimize.css.MinimizeCSSManager;
029import org.ametys.plugins.core.ui.minimize.AbstractMinimizeSourceMapReader;
030import org.ametys.plugins.core.ui.minimize.HashCache.UriData;
031
032/**
033 * Reader for Source map of minimized css files
034 */
035public class MinimizeCSSSourceMapReader extends AbstractMinimizeSourceMapReader
036{
037    private MinimizeCSSManager _cssMinimizeManager;
038
039    @Override
040    public void service(ServiceManager smanager) throws ServiceException
041    {
042        super.service(smanager);
043        
044        _cssMinimizeManager = (MinimizeCSSManager) manager.lookup(MinimizeCSSManager.ROLE);
045    }
046
047    @Override
048    public void generate() throws IOException, SAXException, ProcessingException
049    {
050        Source sourceMap = _sourceMapCache.get(source + ".css.map");
051        if (sourceMap == null) 
052        {
053            List<UriData> filesForHash = _hashCache.getFilesForHash(source, true);
054            if (filesForHash != null)
055            {
056                // compiles the css files and store the source map in the source map cache
057                _cssMinimizeManager.minimizeAndAggregateURIs(filesForHash, source + ".css", true);
058                
059                sourceMap = _sourceMapCache.get(source + ".css.map");
060            }
061        }
062        
063        if (sourceMap == null) 
064        {
065            throw new IllegalStateException("There is no source map for minimized hash file '" + source + ".css'");
066        }
067        
068        IOUtils.copy(sourceMap.getInputStream(), out);
069        out.close();
070    }
071}