/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2016 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.platform.web.servlet;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONException;
import org.json.JSONObject;
import org.pentaho.platform.api.ui.IThemeManager;
import org.pentaho.platform.api.ui.ModuleThemeInfo;
import org.pentaho.platform.api.ui.Theme;
import org.pentaho.platform.api.ui.ThemeResource;
import org.pentaho.platform.api.usersettings.IUserSettingService;
import org.pentaho.platform.engine.core.system.PentahoSystem;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
/**
* Writes out the current Theme Tree out as Javascript. The current system and active module theme information is turned
* into a JSON object for use by the web client
*
* User: nbaker Date: 5/24/11
*/
public class ThemeServlet extends ServletBase {
private static final long serialVersionUID = -7408362317719420602L;
private static final Log logger = LogFactory.getLog( UIServlet.class );
private IThemeManager themeManager = (IThemeManager) PentahoSystem.get( IThemeManager.class, null );
@Override
public Log getLogger() {
return logger;
}
@Override
protected void doGet( HttpServletRequest req, HttpServletResponse resp ) throws ServletException, IOException {
handleRequest( req, resp );
}
public void handleRequest( HttpServletRequest req, HttpServletResponse resp ) throws ServletException, IOException {
try {
// look for a passed in theme context (content generator, other named area)
String moduleName = req.getParameter( "context" );
OutputStream out = resp.getOutputStream();
resp.setContentType( "text/javascript" ); //$NON-NLS-1$
resp.setHeader( "Cache-Control", "no-cache" ); //$NON-NLS-1$
IUserSettingService settingsService = PentahoSystem.get( IUserSettingService.class, getPentahoSession( req ) );
// NOTE: this code should be kept in sync with that of PentahoWebContextFilter.java
String activeTheme = (String) getPentahoSession( req ).getAttribute( "pentaho-user-theme" );
String ua = req.getHeader( "User-Agent" );
// check if we're coming from a mobile device, if so, lock to system default (crystal)
if ( !StringUtils.isEmpty( ua ) && ua.matches( ".*(?i)(iPad|iPod|iPhone|Android).*" ) ) {
activeTheme = PentahoSystem.getSystemSetting( "default-theme", "crystal" );
}
if ( activeTheme == null ) {
try {
activeTheme = settingsService.getUserSetting( "pentaho-user-theme", null ).getSettingValue();
} catch ( Exception ignored ) { // the user settings service is not valid in the agile-bi deployment of the
// server
}
if ( activeTheme == null ) {
activeTheme = PentahoSystem.getSystemSetting( "default-theme", "crystal" );
}
}
out.write( ( "\n\n// Theming scripts. This file is generated by (" + getClass().getName()
+ ") and cannot be found on disk\n" )
.getBytes() );
out.write( ( "var active_theme = \"" + activeTheme + "\";\n\n" ).getBytes() );
// Build-up JSON graph for system theme.
JSONObject root = new JSONObject();
JSONObject themeObject;
for ( String systemThemeName : themeManager.getSystemThemeIds() ) {
Theme theme = themeManager.getSystemTheme( systemThemeName );
themeObject = new JSONObject();
root.put( theme.getId(), themeObject );
themeObject.put( "rootDir", theme.getThemeRootDir() );
for ( ThemeResource res : theme.getResources() ) {
themeObject.append( "resources", res.getLocation() );
}
}
out.write( ( "var core_theme_tree = " + root.toString() + ";\n\n" ).getBytes() );
out.write( "// Inject the theme script to handle the insertion of requested theme resources\n\n".getBytes() );
ModuleThemeInfo moduleThemeinfo = themeManager.getModuleThemeInfo( moduleName );
if ( moduleThemeinfo != null ) {
// Build-up JSON graph for module theme.
root = new JSONObject();
for ( Theme theme : moduleThemeinfo.getModuleThemes() ) {
themeObject = new JSONObject();
root.put( theme.getName(), themeObject );
themeObject.put( "rootDir", theme.getThemeRootDir() );
for ( ThemeResource res : theme.getResources() ) {
themeObject.append( "resources", res.getLocation() );
}
}
out.write( ( "var module_theme_tree = " + root.toString() + ";\n\n" ).getBytes() );
}
// createElement & insertBefore
out.write( ( "(function() {\n"
+ "var script = document.createElement('script');\n"
+ "script.type = 'text/javascript';\n"
+
// "script.async = false;\n" +
"script.src = CONTEXT_PATH + 'js/themeResources.js';\n"
+ "var existing = document.getElementsByTagName('script')[0];\n"
+ "existing.parentNode.insertBefore(script, existing);\n" + "}());" ).getBytes() );
} catch ( IOException e ) {
logger.debug( "IO exception creating Theme info", e );
throw new ServletException( e );
} catch ( JSONException e ) {
logger.debug( "JSON exception creating Theme info", e );
throw new ServletException( e );
}
}
}