com.meltmedia.cadmium.copyright.service.CopyrightResourceHandler.java Source code

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Here is the source code for com.meltmedia.cadmium.copyright.service.CopyrightResourceHandler.java

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/**
 *    Copyright 2012 meltmedia
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.meltmedia.cadmium.copyright.service;

import jodd.jerry.Jerry;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.util.Calendar;

/**
 * {@link ResourceHandler} that updates all html elements that have 
 * an attribute of <code>data-cadmium="copyright"</code> with the current year.
 * 
 * @author John McEntire
 *
 */
public class CopyrightResourceHandler implements ResourceHandler {
    private final Logger log = LoggerFactory.getLogger(getClass());

    protected Integer year;
    private Jerry.JerryParser jerryParser = null;

    /**
     * Initializes this instance with the current year.
     */
    public CopyrightResourceHandler() {
        year = Calendar.getInstance().get(Calendar.YEAR);
        log.debug("Updating all copyrights on site to {}", year);
    }

    /**
     * Updates the copyright dates in the given file.
     */
    @Override
    public void handleFile(File htmlFile) {
        if (jerryParser == null) {
            jerryParser = Jerry.jerry().enableHtmlMode();
            jerryParser.getDOMBuilder().setCaseSensitive(false);
            jerryParser.getDOMBuilder().setParseSpecialTagsAsCdata(true);
            jerryParser.getDOMBuilder().setSelfCloseVoidTags(false);
            jerryParser.getDOMBuilder().setConditionalCommentExpression(null);
            jerryParser.getDOMBuilder().setEnableConditionalComments(false);
            jerryParser.getDOMBuilder().setImpliedEndTags(false);
        }
        log.trace("Handling file {}", htmlFile);
        try {
            String fileContents = FileUtils.readFileToString(htmlFile);
            Jerry html = jerryParser.parse(fileContents);
            Jerry selector = html.$("[data-cadmium='copyright']");
            log.debug("Found {} copyright tags.", selector.length());
            if (selector.length() > 0) {
                selector.text(year.toString());
                log.trace("Writing updated file {}", htmlFile);
                FileUtils.writeStringToFile(htmlFile, html.html(), false);
            }
        } catch (Throwable t) {
            log.warn("Failed to update file " + htmlFile, t);
        }
    }

}