com.sangupta.pep.macros.QRMacro.java Source code

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Here is the source code for com.sangupta.pep.macros.QRMacro.java

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/**
 *
 * Pep - Slideshows using HTML5
 * Copyright (c) 2012, Sandeep Gupta
 * 
 * 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.sangupta.pep.macros;

import java.io.File;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

import com.sangupta.pep.ContentAndClasses;
import com.sangupta.pep.IMacro;

public class QRMacro implements IMacro {

    private static final Pattern PATTERN = Pattern.compile("(.*)<p>\\.qr:\\s?(\\d*?)\\|(.*?)</p>(.*)",
            Pattern.DOTALL);

    @Override
    public ContentAndClasses process(String content, File parentDir) {
        final ContentAndClasses cc = new ContentAndClasses(content);

        if (StringUtils.isEmpty(content)) {
            return cc;
        }

        Matcher matcher = PATTERN.matcher(content);
        if (matcher.matches()) {
            StringBuilder builder = new StringBuilder();
            builder.append(matcher.group(1));
            builder.append("<p class=\"qr\"><img src=\"http://chart.apis.google.com/chart?chs=");
            builder.append(matcher.group(2));
            builder.append("x");
            builder.append(matcher.group(2));
            builder.append("&cht=qr&chl=");
            builder.append(matcher.group(3));
            builder.append("&chf=bg,s,00000000&choe=UTF-8\" alt=\"QR Code\" /></p>");
            builder.append(matcher.group(4));

            String newContent = builder.toString();
            if (!content.equals(newContent)) {
                cc.setContent(newContent);
                cc.addClass("has_qr");
            } else {
                cc.setContent(content);
            }
        }

        return cc;
    }

}