WikiLinkToMarkdownFunction.java

package com.aperture_software.glados_wiki.markdown;

import com.google.common.base.Function;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * Created by jhyun on 14. 2. 7.
 */
public class WikiLinkToMarkdownFunction implements Function<String, String> {

    private static Logger LOG = LoggerFactory.getLogger(WikiLinkToMarkdownFunction.class);

    private static class MarkdownLinkGen implements Function<Matcher, String> {
        private String linkText(final String s) {
            return s.substring(2, s.length() - 2);
        }

        @Override
        public String apply(Matcher input) {
            String c = linkText(input.group());
            return String.format("[%s](%s)", c, UrlEncoder.encode(c));
        }
    }

    private EscapableRegexReplaceFunction rrf = new EscapableRegexReplaceFunction(Pattern.compile("\\[\\[(.+?)\\]\\]"), new MarkdownLinkGen(), true);

    @Override
    public String apply(String input) {
        return rrf.apply(input);
    }
}