001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
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 * Contributors:
017 *     Quentin Lamerand <[email protected]>
018 */
019
020package org.nuxeo.ecm.platform.convert.plugins;
021
022import java.io.IOException;
023import java.io.Serializable;
024import java.util.Map;
025
026import org.nuxeo.ecm.core.api.Blob;
027import org.nuxeo.ecm.core.api.Blobs;
028import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
029import org.nuxeo.ecm.core.convert.api.ConversionException;
030import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder;
031import org.nuxeo.ecm.core.convert.extension.Converter;
032import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor;
033
034import com.cforcoding.jmd.MarkDownParserAndSanitizer;
035
036/**
037 * Markdown to HTML converter
038 *
039 * @author <a href="mailto:[email protected]">Quentin Lamerand</a>
040 * @since 5.5
041 */
042public class Md2HtmlConverter implements Converter {
043
044    private static final String BODY_CONTENT_ONLY = "bodyContentOnly";
045
046    private ConverterDescriptor descriptor;
047
048    @Override
049    public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException {
050
051        Boolean bodyContentOnly = Boolean.FALSE;
052        if (parameters != null) {
053            bodyContentOnly = (Boolean) parameters.get(BODY_CONTENT_ONLY);
054        }
055        if (bodyContentOnly == null) {
056            bodyContentOnly = Boolean.FALSE;
057        }
058        try {
059            Blob inputBlob = blobHolder.getBlob();
060            String mdString = inputBlob.getString();
061            MarkDownParserAndSanitizer md = new MarkDownParserAndSanitizer();
062            StringBuilder html = new StringBuilder();
063            if (!bodyContentOnly) {
064                html.append("<html><head></head><body>");
065            }
066            html.append(md.transform(mdString));
067            if (!bodyContentOnly) {
068                html.append("</body></html>");
069            }
070            Blob outputBlob = Blobs.createBlob(html.toString(), descriptor.getDestinationMimeType());
071            String filename = inputBlob.getFilename();
072            if (filename != null) {
073                int dotPosition = filename.lastIndexOf('.');
074                if (dotPosition > -1) {
075                    filename = filename.substring(0, dotPosition) + ".html";
076                }
077                outputBlob.setFilename(filename);
078            }
079            return new SimpleCachableBlobHolder(outputBlob);
080        } catch (IOException e) {
081            throw new ConversionException("Could not get Markdown string from BlobHolder", e);
082        }
083    }
084
085    @Override
086    public void init(ConverterDescriptor descriptor) {
087        this.descriptor = descriptor;
088    }
089
090}