Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A Class that implements ldap configuration methods

 *  Copyright: 2008 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Michael Daigle

 *

 *   '$Author: daigle $'

 *     '$Date: 2008-10-10 17:11:10 -0700 (Fri, 10 Oct 2008) $'

 * '$Revision: 4440 $'

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.admin;

import java.io.IOException;

import java.util.Set;

import java.util.SortedMap;

import java.util.Vector;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import edu.ucsb.nceas.metacat.service.PropertyService;

import edu.ucsb.nceas.metacat.util.RequestUtil;

import edu.ucsb.nceas.utilities.FileUtil;

import edu.ucsb.nceas.utilities.GeneralPropertyException;

import edu.ucsb.nceas.utilities.MetaDataProperty;

import edu.ucsb.nceas.utilities.PropertiesMetaData;

import edu.ucsb.nceas.utilities.PropertyNotFoundException;

import edu.ucsb.nceas.utilities.SortedProperties;

/**

 * Control the display of the LDAP configuration page and the processing

 * of the configuration values.

 */

public class LDAPAdmin extends MetaCatAdmin {

	private static LDAPAdmin ldapAdmin = null;

	private static Logger logMetacat = Logger.getLogger(LDAPAdmin.class);

	/**

	 * private constructor since this is a singleton

	 */

	private LDAPAdmin() {}

	/**

	 * Get the single instance of the MetaCatConfig.

	 * 

	 * @return the single instance of MetaCatConfig

	 */

	public static LDAPAdmin getInstance() {

		if (ldapAdmin == null) {

			ldapAdmin = new LDAPAdmin();

		}

		return ldapAdmin;

	}

	/**

	 * Handle configuration of the LDAP properties

	 * 

	 * @param request

	 *            the http request information

	 * @param response

	 *            the http response to be sent back to the client

	 */

	public void configureLDAP(HttpServletRequest request,

			HttpServletResponse response) throws AdminException {

		String processForm = request.getParameter("processForm");

		String formErrors = (String) request.getAttribute("formErrors");

		if (processForm == null || !processForm.equals("true") || formErrors != null) {

			// The servlet configuration parameters have not been set, or there

			// were form errors on the last attempt to configure, so redirect to

			// the web form for configuring metacat

			try {

				// Load the properties metadata file so that the JSP page can

				// use the metadata to construct the editing form

				PropertiesMetaData metadata = PropertyService.getLDAPMetaData();

				request.setAttribute("metadata", metadata);

				request.setAttribute("groupMap", metadata.getGroups());

				// add the list of ldap options and their values to the request

				Vector<String> propertyNames = PropertyService.getPropertyNamesByGroup("ldap");

				for (String name : propertyNames) {

					request.setAttribute(name, PropertyService.getProperty(name));

				} 

				// Check for any backup properties and apply them to the request.

				// These are properties from previous configurations. They keep

				// the user from having to re-enter all values when upgrading.

				// If this is a first time install, getBackupProperties will return

				// null.

				SortedProperties backupProperties = PropertyService.getLDAPBackupProperties();

				if (backupProperties != null) {

					Vector<String> backupKeys = backupProperties.getPropertyNames();

					for (String key : backupKeys) {

						String value = backupProperties.getProperty(key);

						if (value != null) {

							request.setAttribute(key, value);

						}

					}

				}

				// Forward the request to the JSP page

				RequestUtil.forwardRequest(request, response,

						"/admin/ldap-configuration.jsp");

			} catch (PropertyNotFoundException pnfe) {

				throw new AdminException("Problem getting property while initializing "

						+ "LDAP properties page: " + pnfe.getMessage());

			} catch (IOException ioe) {

				throw new AdminException("IO problem while initializing "

						+ "LDAP properties page:" + ioe.getMessage());

			} catch (ServletException se) {

				throw new AdminException("problem forwarding request while " 

						+ "initializing LDAP properties page: " + se.getMessage());

			}

		} else {

			// The configuration form is being submitted and needs to be

			// processed.

			Vector<String> processingSuccess = new Vector<String>();

			Vector<String> processingErrors = new Vector<String>();

			Vector<String> validationErrors = new Vector<String>();

			try {

				// For each property, check if it is changed and save it

				PropertiesMetaData ldapMetaData = PropertyService

						.getLDAPMetaData();

				// process the fields for the global options (group 1)

				SortedMap<Integer, MetaDataProperty> globalPropertyMap = ldapMetaData

						.getPropertiesInGroup(1);

				Set<Integer> globalPropertyIndexes = globalPropertyMap.keySet();

				for (Integer globalPropertyIndex : globalPropertyIndexes) {

					String globalPropertyKey = globalPropertyMap.get(

							globalPropertyIndex).getKey();

					PropertyService.checkAndSetProperty(request,

							globalPropertyKey);

				}

				// we need to write the options from memory to the properties

				// file

				PropertyService.persistProperties();

				// Validate that the options provided are legitimate. Note that

				// we've allowed them to persist their entries. As of this point

				// there is no other easy way to go back to the configure form

				// and preserve their entries.

				validationErrors.addAll(validateOptions(request));

				// Try to create data file and backup directories if

				// necessary.

				String backupDir = PropertyService.getBackupDir();

				try {

					FileUtil.createDirectory(backupDir);

				} catch (IOException ioe) {

					String errorString = "Could not create directory: " + backupDir

							+ " : " + ioe.getMessage();

					logMetacat.error(errorString);

					validationErrors.add(errorString);

				}

				// Write out the configurable properties to a backup file

				// outside the install directory.  Note that we allow them to

				// do this even if they have validation errors.  They will

				// need to go back and fix the errors before they can run metacat.

				PropertyService.persistLDAPBackupProperties(request.getSession()

						.getServletContext());

			} catch (GeneralPropertyException gpe) {

				String errorMessage = "Problem getting or setting property while "

					+ "processing LDAP properties page: " + gpe.getMessage();

				logMetacat.error(errorMessage);

				processingErrors.add(errorMessage);

			} 

			try {

				if (validationErrors.size() > 0 || processingErrors.size() > 0) {

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestFormErrors(request, validationErrors);

					RequestUtil.setRequestErrors(request, processingErrors);

					RequestUtil.forwardRequest(request, response, "/admin");

				} else {

					// Now that the options have been set, change the

					// 'ldapConfigured' option to 'true'

					PropertyService.setProperty("configutil.ldapConfigured",

							PropertyService.CONFIGURED);

					// Reload the main metacat configuration page

					processingSuccess.add("LDAP successfully configured");

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestSuccess(request, processingSuccess);

					RequestUtil.forwardRequest(request, response,

							"/admin?configureType=configure&processForm=false");

				}

			} catch (ServletException se) {

				throw new AdminException("problem forwarding request while "

						+ "processing LDAP properties page: " + se.getMessage());

			} catch (IOException ioe) {

				throw new AdminException("IO problem while processing LDAP "

						+ "properties page: " + ioe.getMessage());

			} catch (GeneralPropertyException gpe) {

				String errorMessage = "Problem getting or setting property while "

					+ "processing LDAP properties page: " + gpe.getMessage();

				logMetacat.error(errorMessage);

				processingErrors.add(errorMessage);

			}

		}

	}

	/**

	 * Validate the most important configuration options submitted by the user.

	 * 

	 * @return a vector holding error message for any fields that fail

	 *         validation.

	 */

	protected Vector<String> validateOptions(HttpServletRequest request) {

		Vector<String> errorVector = new Vector<String>();

		//TODO MCD validate options.

		return errorVector;

	}

}