Java tutorial
/** * Copyright (c) 2014-present Sebastien Le Marchand 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 3 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.slemarchand.pagecomposer.hook.events; import com.liferay.portal.kernel.events.Action; import com.liferay.portal.kernel.events.ActionException; import com.liferay.portal.kernel.exception.SystemException; import com.liferay.portal.kernel.log.Log; import com.liferay.portal.kernel.log.LogFactoryUtil; import com.liferay.portal.kernel.servlet.BrowserSnifferUtil; import com.liferay.portal.kernel.servlet.taglib.util.OutputData; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.util.StringBundler; import com.liferay.portal.kernel.util.WebKeys; import com.liferay.portal.model.ColorScheme; import com.liferay.portal.model.Layout; import com.liferay.portal.model.Theme; import com.liferay.portal.model.User; import com.liferay.portal.security.auth.PrincipalException; import com.liferay.portal.security.permission.ActionKeys; import com.liferay.portal.security.permission.PermissionChecker; import com.liferay.portal.security.permission.PermissionThreadLocal; import com.liferay.portal.service.ThemeLocalServiceUtil; import com.liferay.portal.service.permission.LayoutPermissionUtil; import com.liferay.portal.theme.ThemeDisplay; import java.io.File; import java.util.Date; import java.util.Iterator; import javax.servlet.ServletRequest; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ThemeParameterServicePreAction extends Action { @Override public void run(HttpServletRequest request, HttpServletResponse response) throws ActionException { try { servicePre(request, response); } catch (Exception e) { throw new ActionException(e); } } protected void servicePre(HttpServletRequest request, HttpServletResponse response) throws Exception { String themeId = ParamUtil.getString(request, "_pagecomposer_themeId", null); if (themeId != null) { ThemeDisplay themeDisplay = (ThemeDisplay) request.getAttribute(WebKeys.THEME_DISPLAY); Layout layout = themeDisplay.getLayout(); if (layout != null) { String colorSchemeId = ParamUtil.getString(request, "_pagecomposer_colorSchemeId", null); PermissionChecker permissionChecker = _getPermissionChecker(); boolean hasPermission = LayoutPermissionUtil.contains(permissionChecker, layout.getGroupId(), layout.isPrivateLayout(), layout.getLayoutId(), ActionKeys.UPDATE); if (!hasPermission) { if (_log.isWarnEnabled()) { User user = permissionChecker.getUser(); _log.warn("User (userId=" + user.getUserId() + ", screenName=" + user.getScreenName() + ", emailAddress=" + user.getEmailAddress() + ") attempted to switch theme for request (themeId=" + themeId + ", colorSchemeId=" + colorSchemeId); } } else { switchThemeForRequest(themeId, colorSchemeId, themeDisplay); } } } } private void switchThemeForRequest(String themeId, String colorSchemeId, ThemeDisplay themeDisplay) throws SystemException { HttpServletRequest request = themeDisplay.getRequest(); boolean wapTheme = BrowserSnifferUtil.isWap(request); long companyId = themeDisplay.getCompanyId(); Theme theme = ThemeLocalServiceUtil.getTheme(companyId, themeId, wapTheme); ColorScheme colorScheme = null; if (colorSchemeId != null) { colorScheme = ThemeLocalServiceUtil.getColorScheme(companyId, themeId, colorSchemeId, wapTheme); } else if (theme.hasColorSchemes()) { Iterator<ColorScheme> it = theme.getColorSchemes().iterator(); do { colorScheme = it.next(); } while (!colorScheme.isDefaultCs() && it.hasNext()); } // Override current theme request.setAttribute(WebKeys.THEME, theme); request.setAttribute("COLOR_SCHEME", colorScheme); // Can't use constant located un portal-impl.jar themeDisplay.setLookAndFeel(theme, colorScheme); // Inject Javascript into page bottom String javascriptSrc = themeDisplay.getPortalURL() + _JAVASCRIPT_PATH + "?t=" + _getJavascriptTimestamp(request); StringBundler sb = new StringBundler(); sb.append("<script src=\"" + javascriptSrc + "\" type=\"text/javascript\"></script>"); OutputData outputData = _getOutputData(request); String outputKey = this.getClass().getName(); outputData.addData(outputKey, WebKeys.PAGE_BODY_BOTTOM, sb); } private static long _getJavascriptTimestamp(HttpServletRequest request) { if (_javascriptTimestamp == 0) { File file = new File(request.getServletContext().getRealPath(_JAVASCRIPT_PATH)); if (file.exists()) { _javascriptTimestamp = file.lastModified(); } else { _javascriptTimestamp = new Date().getTime(); } } return _javascriptTimestamp; } private static PermissionChecker _getPermissionChecker() throws PrincipalException { PermissionChecker permissionChecker = PermissionThreadLocal.getPermissionChecker(); if (permissionChecker == null) { throw new PrincipalException("PermissionChecker not initialized"); } return permissionChecker; } private static OutputData _getOutputData(ServletRequest servletRequest) { OutputData outputData = (OutputData) servletRequest.getAttribute(WebKeys.OUTPUT_DATA); if (outputData == null) { outputData = new OutputData(); servletRequest.setAttribute(WebKeys.OUTPUT_DATA, outputData); } return outputData; } private static long _javascriptTimestamp = 0; private static Log _log = LogFactoryUtil.getLog(ThemeParameterServicePreAction.class); private static final String _JAVASCRIPT_PATH = "/html/js/page_composer/page_body_bottom.js"; }