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/**
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* '$RCSfile$'
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* Purpose: A Class that implements skins configuration methods
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* Copyright: 2008 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Michael Daigle
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*
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* '$Author: daigle $'
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* '$Date: 2008-10-10 17:11:10 -0700 (Fri, 10 Oct 2008) $'
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* '$Revision: 4440 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.admin;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Set;
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import java.util.Vector;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.service.PropertyService;
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import edu.ucsb.nceas.metacat.service.SkinPropertyService;
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import edu.ucsb.nceas.metacat.util.RequestUtil;
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import edu.ucsb.nceas.metacat.util.SkinUtil;
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import edu.ucsb.nceas.utilities.FileUtil;
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import edu.ucsb.nceas.utilities.MetaDataProperty;
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import edu.ucsb.nceas.utilities.PropertiesMetaData;
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import edu.ucsb.nceas.utilities.GeneralPropertyException;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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import edu.ucsb.nceas.utilities.SortedProperties;
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/**
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* Control the display of the skins configuration page and the processing
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* of the configuration values.
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*/
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public class SkinsAdmin extends MetaCatAdmin {
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private static SkinsAdmin skinsAdmin = null;
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private static Logger logMetacat = Logger.getLogger(SkinsAdmin.class);
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/**
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* private constructor since this is a singleton
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*/
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private SkinsAdmin() {}
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/**
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* Get the single instance of the MetaCatConfig.
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*
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* @return the single instance of MetaCatConfig
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*/
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public static SkinsAdmin getInstance() {
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if (skinsAdmin == null) {
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skinsAdmin = new SkinsAdmin();
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}
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return skinsAdmin;
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}
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/**
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* Handle configuration of the application the first time that Metacat
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* starts or when it is explicitly called in the url. Collect necessary
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* configuration information from the administrator.
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*
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* @param request
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* the http request information
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* @param response
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* the http response to be sent back to the client
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*/
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public void configureSkins(HttpServletRequest request, HttpServletResponse response)
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throws AdminException {
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String processForm = request.getParameter("processForm");
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String formErrors = (String) request.getAttribute("formErrors");
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if (processForm == null || !processForm.equals("true") || formErrors != null) {
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// The servlet configuration parameters have not been set, or there
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// were form errors on the last attempt to configure, so redirect to
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// the web form for configuring metacat
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try {
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Vector<String> skinNames = SkinUtil.getSkinNames();
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String defaultStyle =
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PropertyService.getProperty("application.default-style");
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request.setAttribute("defaultStyle", defaultStyle);
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request.setAttribute("skinNameList", skinNames);
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// add skin metadata to the request. The configuration form
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// will use this data to determine what the configuration
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// fields should look like.
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HashMap<String, PropertiesMetaData> propertyMetaData =
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SkinPropertyService.getMetaData();
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request.setAttribute("metadataMap", propertyMetaData);
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// get a deep copy of properties so we can override with
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// backup values without changing originals
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HashMap<String, SortedProperties> originalPropertyMap =
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SkinPropertyService.getProperties();
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HashMap<String, HashMap<String, String>> localPropertyMap =
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new HashMap<String, HashMap<String, String>>();
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HashMap<String, SortedProperties> backupPropertiesMap =
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SkinPropertyService.getBackupProperties();
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for (String skinName : skinNames) {
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// first, get a deep copy of this skin's properties
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SortedProperties skinProperties = originalPropertyMap.get(skinName);
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if (skinProperties == null) {
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throw new GeneralPropertyException("Could not find properties "
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+ "for skin: " + skinName);
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}
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HashMap<String, String> originalSkinProperties =
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skinProperties.getProperties();
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HashMap<String, String> localSkinProperties =
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new HashMap<String, String>(originalSkinProperties);
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// now get the backup properties for this skin. Overwrite the
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// properties with backup properties. This allows previously
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// set properties to be preserved in an application upgrade.
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SortedProperties backupProperties = backupPropertiesMap.get(skinName);
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for (String propertyName : backupProperties.getPropertyNames())
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{
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localSkinProperties.put(propertyName,
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backupProperties.getProperty(propertyName));
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}
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localPropertyMap.put(skinName, localSkinProperties);
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}
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request.setAttribute("skinProperties", localPropertyMap);
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// Forward the request to the JSP page
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RequestUtil.forwardRequest(request, response,
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"/admin/skins-configuration.jsp");
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} catch (GeneralPropertyException pnfe) {
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throw new AdminException("Problem getting property while initializing "
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+ "skins properties page: " + pnfe.getMessage());
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} catch (IOException ioe) {
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throw new AdminException("IO problem while initializing "
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+ "skins properties page:" + ioe.getMessage());
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} catch (ServletException se) {
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throw new AdminException("problem forwarding request while "
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+ "initializing skins properties page: " + se.getMessage());
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}
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} else {
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// The configuration form is being submitted and needs to be
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// processed.
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Vector<String> processingSuccess = new Vector<String>();
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Vector<String> processingErrors = new Vector<String>();
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Vector<String> validationErrors = new Vector<String>();
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try {
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// For each skin property, check if it is changed and save it
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Vector<String> skinNames = SkinUtil.getSkinNames();
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for (String skinName : skinNames) {
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PropertiesMetaData skinMetaData =
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SkinPropertyService.getMetaData(skinName);
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Set<String> metaDataKeySet = skinMetaData.getKeys();
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for (String metaDataKey : metaDataKeySet) {
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MetaDataProperty metaDataProperty =
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skinMetaData.getProperties().get(metaDataKey);
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String fieldType = metaDataProperty.getFieldType();
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String newValue = request.getParameter(skinName + "." + metaDataKey);
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if (fieldType != null && fieldType.equals("checkbox")) {
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if (newValue != null && newValue.equals("on")) {
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SkinPropertyService.checkAndSetProperty("true", skinName, metaDataKey);
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} else {
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SkinPropertyService.checkAndSetProperty("false", skinName, metaDataKey);
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}
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} else {
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SkinPropertyService.checkAndSetProperty(request, skinName, metaDataKey);
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}
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}
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// we need to write the options from memory to the
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// properties file
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SkinPropertyService.persistProperties(skinName);
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// Validate that the options provided are legitimate. Note
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// that we've allowed them to persist their entries. As of
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// this point there is no other easy way to go back to the
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// configure form and preserve their entries.
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validationErrors.addAll(validateOptions(request, skinName));
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// Try to create backup directories if necessary.
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String backupDir = PropertyService.getBackupDir();
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try {
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FileUtil.createDirectory(backupDir);
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} catch (IOException ioe) {
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String errorString = "Could not create directory: " + backupDir +
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" : " + ioe.getMessage();
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logMetacat.error(errorString);
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validationErrors.add(errorString);
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}
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// write the backup properties to a location outside the
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// application directories so they will be available after
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// the next upgrade
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SkinPropertyService.persistBackupProperties(skinName,
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request.getSession().getServletContext());
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}
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// Now that the options have been set, change the
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// 'skinsConfigured'
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// option to 'true' so that normal metacat requests will go
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// through
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PropertyService.setProperty("configutil.skinsConfigured",
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PropertyService.CONFIGURED);
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} catch (GeneralPropertyException gpe) {
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String errorMessage = "problem setting property while processing skins "
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+ "properties page: " + gpe.getMessage();
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logMetacat.error(errorMessage);
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processingErrors.add(errorMessage);
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} catch (IOException ioe) {
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String errorMessage = "IO problem while processing skins "
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+ "properties page: " + ioe.getMessage();
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logMetacat.error(errorMessage);
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processingErrors.add(errorMessage);
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}
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try {
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if (validationErrors.size() > 0 || processingErrors.size() > 0) {
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setRequestFormErrors(request, validationErrors);
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RequestUtil.setRequestErrors(request, processingErrors);
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RequestUtil.forwardRequest(request, response, "/admin");
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} else {
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// Now that the options have been set, change the
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// 'skinsConfigured' option to 'true'
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PropertyService.setProperty("configutil.skinsConfigured",
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PropertyService.CONFIGURED);
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// Reload the main metacat configuration page
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processingSuccess.add("Skins successfully configured");
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setRequestSuccess(request, processingSuccess);
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RequestUtil.forwardRequest(request, response,
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"/admin?configureType=configure&processForm=false");
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}
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} catch (ServletException se) {
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throw new AdminException("problem forwarding request while "
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+ "processing skins properties page: " + se.getMessage());
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} catch (IOException ioe) {
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throw new AdminException("IO problem while processing skins "
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+ "properties page: " + ioe.getMessage());
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} catch (GeneralPropertyException gpe) {
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String errorMessage = "problem setting property while processing skins "
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+ "properties page: " + gpe.getMessage();
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logMetacat.error(errorMessage);
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processingErrors.add(errorMessage);
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}
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}
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}
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protected Vector<String> validateOptions(HttpServletRequest request) {
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Vector<String> errorVector = new Vector<String>();
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Vector<String> skinNames = null;
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try {
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skinNames = SkinUtil.getSkinNames();
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} catch (PropertyNotFoundException pnfe) {
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errorVector.add("Could not find skin names: " + pnfe.getMessage());
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}
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for (String skinName : skinNames) {
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errorVector.addAll(validateOptions(request, skinName));
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}
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return errorVector;
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}
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/**
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* Validate the most important configuration options submitted by the user.
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*
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* @return a vector holding error message for any fields that fail
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* validation.
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*/
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protected Vector<String> validateOptions(HttpServletRequest request, String skinName) {
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Vector<String> errorVector = new Vector<String>();
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//TODO MCD validate options.
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return errorVector;
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}
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}
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