Index: lams_common/src/java/org/lamsfoundation/lams/integration/util/LoginRequestDispatcher.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/integration/util/LoginRequestDispatcher.java,v
diff -u
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ lams_common/src/java/org/lamsfoundation/lams/integration/util/LoginRequestDispatcher.java	20 Sep 2006 02:41:18 -0000	1.1
@@ -0,0 +1,131 @@
+/**
+ * Copyright (C) 2005 LAMS Foundation (http://lamsfoundation.org)
+ *
+ * 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
+ *
+ * http://www.gnu.org/licenses/gpl.txt
+ */
+package org.lamsfoundation.lams.integration.util;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+
+import org.lamsfoundation.lams.integration.ExtServerOrgMap;
+import org.lamsfoundation.lams.integration.ExtUserUseridMap;
+import org.lamsfoundation.lams.integration.UserInfoFetchException;
+import org.lamsfoundation.lams.integration.service.IIntegrationService;
+import org.lamsfoundation.lams.integration.service.IntegrationService;
+import org.lamsfoundation.lams.lesson.service.ILessonService;
+import org.springframework.web.context.support.WebApplicationContextUtils;
+
+/**
+ * @author Fei Yang, Anthony Xiao
+ */
+public class LoginRequestDispatcher {
+
+	public static final String PARAM_USER_ID = "uid";
+
+	public static final String PARAM_SERVER_ID = "sid";
+
+	public static final String PARAM_TIMESTAMP = "ts";
+
+	public static final String PARAM_HASH = "hash";
+
+	public static final String PARAM_METHOD = "method";
+
+	public static final String PARAM_COURSE_ID = "courseid";
+
+	public static final String PARAM_COUNTRY = "country";
+
+	public static final String PARAM_LANGUAGE = "lang";
+
+	public static final String METHOD_AUTHOR = "author";
+
+	public static final String METHOD_MONITOR = "monitor";
+
+	public static final String METHOD_LEARNER = "learner";
+
+	private static final String PARAM_LESSON_ID = "lsid";
+
+	private static final String URL_DEFAULT = "/index.jsp";
+
+	private static final String URL_AUTHOR = "/home.do?method=author";
+
+	private static final String URL_LEARNER = "/home.do?method=learner&lessonID=";
+
+	private static final String URL_MONITOR = "/home.do?method=monitorLesson&lessonID=";
+
+	private static IIntegrationService integrationService = null;
+
+	private static ILessonService lessonService = null;
+
+	/**
+	 * This method is called within LoginRequestValve and LoginRequestServlet.
+	 * It simply fetch the method parameter from HttpServletRequest and build
+	 * the url to redirect user to.
+	 * 
+	 * @param request
+	 * @return
+	 */
+	public static String getRequestURL(HttpServletRequest request) throws ServletException {
+
+		String method = request.getParameter(PARAM_METHOD);
+		String lessonId = request.getParameter(PARAM_LESSON_ID);
+
+		try {
+			addUserToLessonClass(request, lessonId, method);
+		} catch (UserInfoFetchException e) {
+			throw new ServletException(e);
+		}
+
+		/** AUTHOR * */
+		if (METHOD_AUTHOR.equals(method)) {
+			return request.getContextPath() + URL_AUTHOR;
+		}
+		/** MONITOR * */
+		else if (METHOD_MONITOR.equals(method) && lessonId != null) {
+			return request.getContextPath() + URL_MONITOR + lessonId;
+		}
+		/** LEARNER * */
+		else if (METHOD_LEARNER.equals(method) && lessonId != null) {
+			return request.getContextPath() + URL_LEARNER + lessonId;
+		} else {
+			return request.getContextPath() + URL_DEFAULT;
+		}
+	}
+
+	private static void addUserToLessonClass(HttpServletRequest request, String lessonId,
+			String method) throws UserInfoFetchException {
+		if (integrationService == null) {
+			integrationService = (IntegrationService) WebApplicationContextUtils
+					.getRequiredWebApplicationContext(request.getSession().getServletContext())
+					.getBean("integrationService");
+		}
+		if (lessonService == null) {
+			lessonService = (ILessonService) WebApplicationContextUtils
+					.getRequiredWebApplicationContext(request.getSession().getServletContext())
+					.getBean("lessonService");
+		}
+		String serverId = request.getParameter(PARAM_SERVER_ID);
+		String extUsername = request.getParameter(PARAM_USER_ID);
+		ExtServerOrgMap serverMap = integrationService.getExtServerOrgMap(serverId);
+		ExtUserUseridMap userMap = integrationService.getExtUserUseridMap(serverMap, extUsername);
+		if(METHOD_LEARNER.equals(method))
+			lessonService.addLearner(Long.parseLong(lessonId), userMap.getUser());
+		else if(METHOD_MONITOR.equals(method))
+			lessonService.addStaffMember(Long.parseLong(lessonId), userMap.getUser());
+	}
+}