001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.wiki.action;
016    
017    import com.liferay.portal.kernel.portlet.LiferayPortletResponse;
018    import com.liferay.portal.kernel.servlet.SessionErrors;
019    import com.liferay.portal.kernel.util.ParamUtil;
020    import com.liferay.portal.struts.PortletAction;
021    import com.liferay.portal.theme.ThemeDisplay;
022    import com.liferay.portal.util.PortalUtil;
023    import com.liferay.portal.util.WebKeys;
024    import com.liferay.portlet.wiki.NoSuchPageException;
025    import com.liferay.portlet.wiki.model.WikiNode;
026    import com.liferay.portlet.wiki.model.WikiPage;
027    import com.liferay.portlet.wiki.service.WikiPageServiceUtil;
028    import com.liferay.portlet.wiki.util.WikiUtil;
029    
030    import javax.portlet.PortletConfig;
031    import javax.portlet.PortletContext;
032    import javax.portlet.PortletRequest;
033    import javax.portlet.PortletRequestDispatcher;
034    import javax.portlet.PortletResponse;
035    import javax.portlet.PortletURL;
036    import javax.portlet.RenderRequest;
037    import javax.portlet.RenderResponse;
038    import javax.portlet.ResourceRequest;
039    import javax.portlet.ResourceResponse;
040    
041    import org.apache.struts.action.ActionForm;
042    import org.apache.struts.action.ActionForward;
043    import org.apache.struts.action.ActionMapping;
044    
045    /**
046     * @author Bruno Farache
047     * @author Julio Camarero
048     */
049    public class CompareVersionsAction extends PortletAction {
050    
051            @Override
052            public ActionForward render(
053                            ActionMapping actionMapping, ActionForm actionForm,
054                            PortletConfig portletConfig, RenderRequest renderRequest,
055                            RenderResponse renderResponse)
056                    throws Exception {
057    
058                    try {
059                            ActionUtil.getNode(renderRequest);
060                            ActionUtil.getPage(renderRequest);
061    
062                            compareVersions(renderRequest, renderResponse);
063                    }
064                    catch (Exception e) {
065                            if (e instanceof NoSuchPageException) {
066                                    SessionErrors.add(renderRequest, e.getClass());
067    
068                                    return actionMapping.findForward("portlet.wiki.error");
069                            }
070                            else {
071                                    throw e;
072                            }
073                    }
074    
075                    return actionMapping.findForward("portlet.wiki.compare_versions");
076            }
077    
078            @Override
079            public void serveResource(
080                            ActionMapping actionMapping, ActionForm actionForm,
081                            PortletConfig portletConfig, ResourceRequest resourceRequest,
082                            ResourceResponse resourceResponse)
083                    throws Exception {
084    
085                    double sourceVersion = ParamUtil.getDouble(
086                            resourceRequest, "filterSourceVersion");
087                    double targetVersion = ParamUtil.getDouble(
088                            resourceRequest, "filterTargetVersion");
089    
090                    String htmlDiffResult = getHtmlDiffResult(
091                            sourceVersion, targetVersion, resourceRequest, resourceResponse);
092    
093                    resourceRequest.setAttribute(WebKeys.DIFF_HTML_RESULTS, htmlDiffResult);
094    
095                    PortletContext portletContext = portletConfig.getPortletContext();
096    
097                    PortletRequestDispatcher portletRequestDispatcher =
098                            portletContext.getRequestDispatcher(
099                                    "/html/taglib/ui/diff_version_comparator/diff_html.jsp");
100    
101                    portletRequestDispatcher.include(resourceRequest, resourceResponse);
102            }
103    
104            protected void compareVersions(
105                            RenderRequest renderRequest, RenderResponse renderResponse)
106                    throws Exception {
107    
108                    long nodeId = ParamUtil.getLong(renderRequest, "nodeId");
109                    String title = ParamUtil.getString(renderRequest, "title");
110                    double sourceVersion = ParamUtil.getDouble(
111                            renderRequest, "sourceVersion");
112                    double targetVersion = ParamUtil.getDouble(
113                            renderRequest, "targetVersion");
114    
115                    String htmlDiffResult = getHtmlDiffResult(
116                            sourceVersion, targetVersion, renderRequest, renderResponse);
117    
118                    renderRequest.setAttribute(WebKeys.DIFF_HTML_RESULTS, htmlDiffResult);
119                    renderRequest.setAttribute(WebKeys.SOURCE_VERSION, sourceVersion);
120                    renderRequest.setAttribute(WebKeys.TARGET_VERSION, targetVersion);
121                    renderRequest.setAttribute(WebKeys.TITLE, title);
122                    renderRequest.setAttribute(WebKeys.WIKI_NODE_ID, nodeId);
123            }
124    
125            protected String getHtmlDiffResult(
126                            double sourceVersion, double targetVersion,
127                            PortletRequest portletRequest, PortletResponse portletResponse)
128                    throws Exception {
129    
130                    ThemeDisplay themeDisplay = (ThemeDisplay)portletRequest.getAttribute(
131                            WebKeys.THEME_DISPLAY);
132    
133                    long nodeId = ParamUtil.getLong(portletRequest, "nodeId");
134                    String title = ParamUtil.getString(portletRequest, "title");
135    
136                    WikiPage sourcePage = WikiPageServiceUtil.getPage(
137                            nodeId, title, sourceVersion);
138                    WikiPage targetPage = WikiPageServiceUtil.getPage(
139                            nodeId, title, targetVersion);
140    
141                    LiferayPortletResponse liferayPortletResponse =
142                            PortalUtil.getLiferayPortletResponse(portletResponse);
143    
144                    PortletURL viewPageURL = liferayPortletResponse.createRenderURL();
145    
146                    viewPageURL.setParameter("struts_action", "/wiki/view");
147    
148                    WikiNode sourceNode = sourcePage.getNode();
149    
150                    viewPageURL.setParameter("nodeName", sourceNode.getName());
151    
152                    PortletURL editPageURL = liferayPortletResponse.createRenderURL();
153    
154                    editPageURL.setParameter("struts_action", "/wiki/edit_page");
155                    editPageURL.setParameter("nodeId", String.valueOf(nodeId));
156                    editPageURL.setParameter("title", title);
157    
158                    String attachmentURLPrefix = WikiUtil.getAttachmentURLPrefix(
159                            themeDisplay.getPathMain(), themeDisplay.getPlid(), nodeId, title);
160    
161                    return WikiUtil.diffHtml(
162                            sourcePage, targetPage, viewPageURL, editPageURL,
163                            attachmentURLPrefix);
164            }
165    
166    }