com.liferay.portlet.wiki.translators.MediaWikiToCreoleTranslator.java Source code

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Here is the source code for com.liferay.portlet.wiki.translators.MediaWikiToCreoleTranslator.java

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/**
 * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portlet.wiki.translators;

import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portlet.wiki.importers.mediawiki.MediaWikiImporter;

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

/**
 * @author Jorge Ferrer
 */
public class MediaWikiToCreoleTranslator extends BaseTranslator {

    public static final String TABLE_OF_CONTENTS = "<<TableOfContents>>\n\n";

    public MediaWikiToCreoleTranslator() {
        initRegexps();
        initNowikiRegexps();
    }

    protected void initNowikiRegexps() {

        // Preformat protected

        nowikiRegexps.add("(<nowiki>)(.*?)(</nowiki>)");
        nowikiRegexps.add("(<pre>)(.*?)(</pre>)");

        // Escape protected

        nowikiRegexps.add("~(\\*\\*|~|//|-|#|\\{\\{|}}|\\\\|~\\[~~[|]]|----|=|\\|)");
    }

    protected void initRegexps() {

        // Clean unnecessary header emphasis

        regexps.put("= '''([^=]+)''' =", "= $1 =");
        regexps.put("== '''([^=]+)''' ==", "== $1 ==");
        regexps.put("== '''([^=]+)''' ===", "=== $1 ===");

        // Unscape angle brackets

        regexps.put("&lt;", "<");
        regexps.put("&gt;", ">");

        // Remove categories

        regexps.put("\\[\\[[Cc]ategory:([^\\]]*)\\]\\][\\n]*", "");

        // Remove disambiguations

        regexps.put("\\{{2}OtherTopics\\|([^\\}]*)\\}{2}", StringPool.BLANK);

        // Remove work in progress

        regexps.put("\\{{2}Work in progress\\}{2}", StringPool.BLANK);

        // Bold and italics

        regexps.put("''''((?s:.)*?)(''''|(\n\n|\r\r|\r\n\r\n))", "**//$1//**$3");

        // Bold

        regexps.put("'''((?s:.)*?)('''|(\n\n|\r\r|\r\n\r\n))", "**$1**$3");

        // Italics

        regexps.put("''((?s:.)*?)(''|(\n\n|\r\r|\r\n\r\n))", "//$1//$3");

        // Normalize URLs

        regexps.put("\\[{2}((http|ftp)[^ ]*) ([^\\]]*)\\]{2}", "[$1 $3]");

        // URL

        regexps.put("\\[((http|ftp)[^ ]*)\\]", "[[$1]]");

        // URL with label

        regexps.put("\\[((http|ftp)[^ ]*) ([^\\]]*)\\]", "[[$1|$3]]");

        // Term and definition

        regexps.put("^\\t([\\w]+):\\t(.*)", "**$1**:\n$2");

        // Indented paragraph

        regexps.put("^\\t:\\t(.*)", "$1");

        // Monospace

        regexps.put("(^ (.+))(\\n (.+))*", "{{{\n$0\n}}}");

        // No wiki

        regexps.put("<nowiki>([^<]*)</nowiki>", "{{{$1}}}");

        // HTML PRE

        regexps.put("<pre>([^<]*)</pre>", "{{{$1}}}");

        // User reference

        regexps.put("[-]*\\[{2}User:([^\\]]*)\\]{2}", "$1");
    }

    @Override
    protected String postProcess(String content) {

        // LEP-6118

        Matcher matcher = Pattern.compile("^=([^=]+)=", Pattern.MULTILINE).matcher(content);

        if (matcher.find()) {
            content = runRegexp(content, "^===([^=]+)===", "====$1====");
            content = runRegexp(content, "^==([^=]+)==", "===$1===");
            content = runRegexp(content, "^=([^=]+)=", "==$1==");
        }

        // Remove HTML tags

        for (int i = 0; i < _HTML_TAGS.length; i++) {
            content = content.replaceAll(_HTML_TAGS[i], StringPool.BLANK);
        }

        // Images

        matcher = Pattern.compile("\\[{2}Image:([^\\]]*)\\]{2}", Pattern.DOTALL).matcher(content);

        StringBuffer sb = new StringBuffer(content);

        int offset = 0;

        while (matcher.find()) {
            String image = "{{" + MediaWikiImporter.SHARED_IMAGES_TITLE + "/" + matcher.group(1).toLowerCase()
                    + "}}";

            sb.replace(matcher.start(0) + offset, matcher.end(0) + offset, image);

            offset += MediaWikiImporter.SHARED_IMAGES_TITLE.length() - 5;
        }

        content = sb.toString();

        // Remove underscores from links

        matcher = Pattern.compile("\\[{2}([^\\]]*)\\]{2}", Pattern.DOTALL).matcher(content);

        sb = new StringBuffer(content);

        while (matcher.find()) {
            String link = matcher.group(1).replace(StringPool.UNDERLINE, StringPool.SPACE);

            sb.replace(matcher.start(1), matcher.end(1), link);
        }

        return TABLE_OF_CONTENTS + super.postProcess(sb.toString());
    }

    private static final String[] _HTML_TAGS = { "<blockquote>", "</blockquote>", "<br>", "<br/>", "<br />",
            "<center>", "</center>", "<cite>", "</cite>", "<code>", "</code>", "<div[^>]*>", "</div>",
            "<font[^>]*>", "</font>", "<hr>", "<hr/>", "<hr />", "<p>", "</p>", "<tt>", "</tt>", "<var>",
            "</var>" };

}