com.liferay.grow.linkedpages.LinkedPagesView.java Source code

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Here is the source code for com.liferay.grow.linkedpages.LinkedPagesView.java

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/**
 * Copyright (c) 2000-present 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.grow.linkedpages;

import com.liferay.grow.linkedpages.util.PageLink;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.theme.ThemeDisplay;
import com.liferay.portal.kernel.util.CharPool;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.wiki.model.WikiPage;
import com.liferay.wiki.service.WikiNodeLocalServiceUtil;
import com.liferay.wiki.service.WikiPageLocalServiceUtil;

import java.util.ArrayList;
import java.util.TreeSet;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Laszlo Hudak
 */
public class LinkedPagesView {

    /**
     * Finding a linked pages in a wiki page
     * Based on Grow Navigation ADT
     * https://grow.liferay.com/group/guest/people/-/wiki/Grow/Grow+navigation+ADT
     */
    public LinkedPagesView(ThemeDisplay themeDisplay) {
        _linkedPages = new TreeSet<>();
        HttpServletRequest request = themeDisplay.getRequest();

        String wikiNode = ParamUtil.getString(request,
                "p_r_p__http://www.liferay.com/public-render-parameters" + "/wiki_nodeName");
        String wikiTitle = ParamUtil.getString(request,
                "p_r_p__http://www.liferay.com/public-render-parameters" + "/wiki_title");

        long groupId = themeDisplay.getScopeGroupId();

        fillLinkedPages(groupId, wikiNode, wikiTitle);
    }

    public void fillLinkedPages(long groupId, String nodeTitle, String pageTitle) {

        try {
            long nodeId = WikiNodeLocalServiceUtil.getNode(groupId, nodeTitle).getNodeId();

            wikiPage = WikiPageLocalServiceUtil.getPage(nodeId, pageTitle);

            String content = wikiPage.getContent();

            if (wikiPage.getFormat().equals("creole")) {
                _addLinksCreole(content);
            } else if (wikiPage.getFormat().equals("html")) {
                _addLinksHTML(content);
            } else if (wikiPage.getFormat().equals("markdown")) {
                _addLinksMarkdown(content);
            }
        } catch (PortalException pe) {
            if (_log.isDebugEnabled()) {
                _log.debug(pe.getMessage());
            }
        }
    }

    public ArrayList<PageLink> getLinkedPages() {
        ArrayList<PageLink> linkedPages = new ArrayList<>();

        linkedPages.addAll(_linkedPages);

        return linkedPages;
    }

    public WikiPage getWikiPage() {
        return wikiPage;
    }

    private void _addLink(String link) {
        if (!link.contains(_GROW_URL + _PUBLIC_PAGE)) {
            String title = link.substring(link.lastIndexOf('/') + 1);

            title = title.replace('+', CharPool.SPACE);

            if (title.contains("#section")) {
                title = title.substring(0, title.indexOf("#section"));
            }

            _linkedPages.add(new PageLink(title, link));
        }
    }

    private void _addLinksCreole(String content) {
        while (content.indexOf(_GROW_URL) > 0) {
            content = content.substring(content.indexOf(_GROW_URL));

            String link = content.substring(0, content.indexOf("]]"));

            if (link.contains("|")) {
                link = link.substring(0, link.indexOf("|"));
            }

            _addLink(link);

            content = content.substring(content.indexOf("]]") + 2);
        }
    }

    private void _addLinksHTML(String content) {
        while (content.indexOf(_GROW_URL) > 0) {
            content = content.substring(content.indexOf(_GROW_URL));

            String link = content.substring(0, content.indexOf("\">"));

            _addLink(link);

            content = content.substring(content.indexOf("</a>") + 4);
        }
    }

    private void _addLinksMarkdown(String content) {
        content = content.replace(CharPool.NEW_LINE, CharPool.SPACE).replace(CharPool.CLOSE_BRACKET,
                CharPool.SPACE);

        String[] contentElements = StringUtil.split(content, CharPool.SPACE);

        for (String element : contentElements) {
            if (element.contains(_GROW_URL)) {
                if (element.startsWith("(")) {
                    element = element.substring(1);
                }

                if (element.endsWith(")")) {
                    element = element.substring(0, element.length() - 1);
                }

                _addLink(element);
            }
        }
    }

    private static final String _GROW_URL = "https://grow.liferay.com/";

    private static final String _PUBLIC_PAGE = "web";

    private static final Log _log = LogFactoryUtil.getLog(LinkedPagesView.class);

    private TreeSet<PageLink> _linkedPages;

    private WikiPage wikiPage = null;

}