Java tutorial
/** * 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.wiki.engine.impl; import com.liferay.portal.kernel.diff.DiffHtmlUtil; import com.liferay.portal.kernel.exception.PortalException; import com.liferay.portal.kernel.io.unsync.UnsyncStringReader; import com.liferay.portal.kernel.io.unsync.UnsyncStringWriter; import com.liferay.portal.kernel.portlet.LiferayPortletURL; import com.liferay.portal.kernel.portlet.PortletURLUtil; import com.liferay.portal.kernel.theme.ThemeDisplay; import com.liferay.portal.kernel.util.HtmlUtil; import com.liferay.portal.kernel.util.HttpUtil; import com.liferay.portal.kernel.util.ListUtil; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.util.StringBundler; import com.liferay.portal.kernel.util.StringPool; import com.liferay.portal.kernel.util.StringUtil; import com.liferay.portal.kernel.util.WebKeys; import com.liferay.taglib.servlet.PipingServletResponse; import com.liferay.wiki.engine.WikiEngine; import com.liferay.wiki.exception.PageContentException; import com.liferay.wiki.exception.WikiFormatException; import com.liferay.wiki.model.WikiNode; import com.liferay.wiki.model.WikiPage; import com.liferay.wiki.model.WikiPageDisplay; import com.liferay.wiki.util.WikiCacheHelper; import java.io.IOException; import java.io.Writer; import java.util.ArrayList; import java.util.Collection; import java.util.HashSet; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.Set; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.portlet.PortletURL; import javax.portlet.RenderRequest; import javax.portlet.RenderResponse; import javax.servlet.ServletException; import javax.servlet.http.HttpServletResponse; import javax.servlet.jsp.PageContext; import org.osgi.service.component.annotations.Component; import org.osgi.service.component.annotations.Reference; /** * @author Brian Wing Shun Chan * @author Jorge Ferrer */ @Component(immediate = true, service = WikiEngineRenderer.class) public class WikiEngineRenderer { public String convert(WikiPage page, PortletURL viewPageURL, PortletURL editPageURL, String attachmentURLPrefix) throws PageContentException, WikiFormatException { LiferayPortletURL liferayViewPageURL = (LiferayPortletURL) viewPageURL; LiferayPortletURL liferayEditPageURL = (LiferayPortletURL) editPageURL; WikiEngine wikiEngine = fetchWikiEngine(page.getFormat()); if (wikiEngine == null) { _wikiCacheHelper.clearCache(page.getNodeId(), page.getTitle()); throw new WikiFormatException(); } String content = wikiEngine.convert(page, viewPageURL, editPageURL, attachmentURLPrefix); String editPageURLString = StringPool.BLANK; if (editPageURL != null) { liferayEditPageURL.setParameter("title", "__REPLACEMENT__", false); editPageURLString = editPageURL.toString(); editPageURLString = StringUtil.replace(editPageURLString, "__REPLACEMENT__", "$1"); } Matcher matcher = _editPageURLPattern.matcher(content); content = _convertURLs(editPageURLString, matcher); String viewPageURLString = StringPool.BLANK; if (viewPageURL != null) { liferayViewPageURL.setParameter("title", "__REPLACEMENT__", false); viewPageURLString = viewPageURL.toString(); viewPageURLString = StringUtil.replace(viewPageURLString, "__REPLACEMENT__", "$1"); } matcher = _viewPageURLPattern.matcher(content); content = _convertURLs(viewPageURLString, matcher); content = _replaceAttachments(content, page.getTitle(), attachmentURLPrefix); return content; } public String diffHtml(WikiPage sourcePage, WikiPage targetPage, PortletURL viewPageURL, PortletURL editPageURL, String attachmentURLPrefix) throws Exception { String sourceContent = StringPool.BLANK; String targetContent = StringPool.BLANK; if (sourcePage != null) { sourceContent = convert(sourcePage, viewPageURL, editPageURL, attachmentURLPrefix); } if (targetPage != null) { targetContent = convert(targetPage, viewPageURL, editPageURL, attachmentURLPrefix); } return DiffHtmlUtil.diff(new UnsyncStringReader(sourceContent), new UnsyncStringReader(targetContent)); } public WikiEngine fetchWikiEngine(String format) { return _wikiEngineTracker.getWikiEngine(format); } public List<WikiPage> filterOrphans(List<WikiPage> pages) throws PortalException { List<Map<String, Boolean>> pageTitles = new ArrayList<>(); for (WikiPage page : pages) { pageTitles.add(_wikiCacheHelper.getOutgoingLinks(page, this)); } Set<WikiPage> notOrphans = new HashSet<>(); for (WikiPage page : pages) { for (Map<String, Boolean> pageTitle : pageTitles) { String pageTitleLowerCase = page.getTitle(); pageTitleLowerCase = StringUtil.toLowerCase(pageTitleLowerCase); if (pageTitle.get(pageTitleLowerCase) != null) { notOrphans.add(page); break; } } } List<WikiPage> orphans = new ArrayList<>(); for (WikiPage page : pages) { if (!notOrphans.contains(page)) { orphans.add(page); } } orphans = ListUtil.sort(orphans); return orphans; } public String getFormatLabel(String format, Locale locale) { WikiEngine wikiEngine = fetchWikiEngine(format); if (wikiEngine != null) { return wikiEngine.getFormatLabel(locale); } else { return StringPool.BLANK; } } public Collection<String> getFormats() { return _wikiEngineTracker.getFormats(); } public String getFormattedContent(RenderRequest renderRequest, RenderResponse renderResponse, WikiPage page, PortletURL viewPageURL, PortletURL editPageURL, String title, boolean preview) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) renderRequest.getAttribute(WebKeys.THEME_DISPLAY); double version = ParamUtil.getDouble(renderRequest, "version"); PortletURL curViewPageURL = PortletURLUtil.clone(viewPageURL, renderResponse); PortletURL curEditPageURL = PortletURLUtil.clone(editPageURL, renderResponse); StringBundler sb = new StringBundler(8); sb.append(themeDisplay.getPathMain()); sb.append("/wiki/get_page_attachment?p_l_id="); sb.append(themeDisplay.getPlid()); sb.append("&nodeId="); sb.append(page.getNodeId()); sb.append("&title="); sb.append(HttpUtil.encodeURL(page.getTitle())); sb.append("&fileName="); String attachmentURLPrefix = sb.toString(); if (!preview && (version == 0)) { WikiPageDisplay pageDisplay = _wikiCacheHelper.getDisplay(page.getNodeId(), title, curViewPageURL, curEditPageURL, attachmentURLPrefix); if (pageDisplay != null) { return pageDisplay.getFormattedContent(); } } return convert(page, curViewPageURL, curEditPageURL, attachmentURLPrefix); } public void renderEditPageHTML(String format, PageContext pageContext, WikiNode node, WikiPage page) throws IOException, ServletException, WikiFormatException { WikiEngine wikiEngine = _wikiEngineTracker.getWikiEngine(format); if (wikiEngine == null) { _wikiCacheHelper.clearCache(page.getNodeId(), page.getTitle()); throw new WikiFormatException(); } HttpServletResponse response = (HttpServletResponse) pageContext.getResponse(); UnsyncStringWriter unsyncStringWriter = new UnsyncStringWriter(); PipingServletResponse pipingServletResponse = new PipingServletResponse(response, unsyncStringWriter); wikiEngine.renderEditPage(pageContext.getRequest(), pipingServletResponse, node, page); Writer writer = pageContext.getOut(); StringBundler sb = unsyncStringWriter.getStringBundler(); writer.write(sb.toString()); } @Reference(unbind = "-") protected void setWikiCacheHelper(WikiCacheHelper wikiCacheHelper) { _wikiCacheHelper = wikiCacheHelper; } @Reference(unbind = "-") protected void setWikiEngineTracker(WikiEngineTracker wikiEngineTracker) { _wikiEngineTracker = wikiEngineTracker; } private String _convertURLs(String url, Matcher matcher) { StringBuffer sb = new StringBuffer(); while (matcher.find()) { String replacement = null; if (matcher.groupCount() >= 1) { String encodedTitle = HttpUtil.encodeURL(HtmlUtil.unescape(matcher.group(1))); replacement = url.replace("$1", encodedTitle); } else { replacement = url; } matcher.appendReplacement(sb, replacement); } return matcher.appendTail(sb).toString(); } private String _replaceAttachments(String content, String title, String attachmentURLPrefix) { content = StringUtil.replace(content, "[$WIKI_PAGE_NAME$]", title); content = StringUtil.replace(content, "[$ATTACHMENT_URL_PREFIX$]", attachmentURLPrefix); return content; } private static final Pattern _editPageURLPattern = Pattern .compile("\\[\\$BEGIN_PAGE_TITLE_EDIT\\$\\](.*?)" + "\\[\\$END_PAGE_TITLE_EDIT\\$\\]"); private static final Pattern _viewPageURLPattern = Pattern .compile("\\[\\$BEGIN_PAGE_TITLE\\$\\](.*?)\\[\\$END_PAGE_TITLE\\$\\]"); private WikiCacheHelper _wikiCacheHelper; private WikiEngineTracker _wikiEngineTracker; }