/*
* Copyright (c) 2009 Lockheed Martin Corporation
*
* 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 org.eurekastreams.server.service.actions.strategies.links;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eurekastreams.server.domain.stream.LinkInformation;
/**
* Parses the meta description.
*/
public class MetaDescriptionParser implements HtmlLinkInformationParserStrategy
{
/**
* Logger.
*/
private Log log = LogFactory.getLog(MetaDescriptionParser.class);
/**
* Maximum length.
*/
private int maxLength = 0;
/**
* Constuctor.
*
* @param inMaxLength
* maximum description length.
*/
public MetaDescriptionParser(final int inMaxLength)
{
maxLength = inMaxLength;
}
/**
* Parse the information.
*
* @param htmlString
* the HTML as a string.
* @param link
* the LinkInformation.
* @param inAccountId
* account id of the user making the request.
*/
public void parseInformation(final String htmlString, final LinkInformation link, final String inAccountId)
{
Pattern descriptionPattern = Pattern.compile("<meta name=\"description\" content=\"(.*?)\"",
Pattern.CASE_INSENSITIVE);
Matcher matcher = descriptionPattern.matcher(htmlString);
if (matcher.find())
{
for (int i = 0; i < matcher.groupCount(); i++)
{
log.info("Found description: " + i + "=" + matcher.group(i));
}
String desc = matcher.group(1);
log.info("Found description: " + desc);
if (desc.length() > maxLength)
{
String endWith = "...";
desc = desc.substring(0, maxLength - (1 + endWith.length()));
desc += endWith;
}
link.setDescription(desc);
}
}
}