/**
* Copyright © 2002 Instituto Superior Técnico
*
* This file is part of FenixEdu Academic.
*
* FenixEdu Academic 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.
*
* FenixEdu Academic 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FenixEdu Academic. If not, see <http://www.gnu.org/licenses/>.
*/
package org.fenixedu.academic.ui.struts.action.student;
import java.util.List;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.fenixedu.academic.domain.UserPrivateKey;
import org.fenixedu.academic.domain.exceptions.DomainException;
import org.fenixedu.academic.domain.student.Registration;
import org.fenixedu.academic.dto.messaging.RegistrationsBean;
import org.fenixedu.academic.ui.struts.action.base.FenixDispatchAction;
import org.fenixedu.academic.ui.struts.action.student.StudentApplication.StudentViewApp;
import org.fenixedu.bennu.core.domain.User;
import org.fenixedu.bennu.core.security.Authenticate;
import org.fenixedu.bennu.struts.annotations.Forward;
import org.fenixedu.bennu.struts.annotations.Forwards;
import org.fenixedu.bennu.struts.annotations.Mapping;
import org.fenixedu.bennu.struts.portal.EntryPoint;
import org.fenixedu.bennu.struts.portal.StrutsFunctionality;
import org.joda.time.DateTime;
import pt.ist.fenixframework.FenixFramework;
import com.google.common.hash.Hashing;
@StrutsFunctionality(app = StudentViewApp.class, descriptionKey = "label.title.sync", path = "sync",
bundle = "MessagingResources", titleKey = "label.title.sync")
@Mapping(path = "/ICalTimeTable", module = "student")
@Forwards({ @Forward(name = "viewOptions", path = "/student/iCalendar/viewCalendarInformation.jsp"),
@Forward(name = "chooseRegistration", path = "/student/iCalendar/chooseRegistration.jsp") })
public class ICalStudentTimeTable extends FenixDispatchAction {
public ActionForward show(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception {
if (getRenderedObject("bean") == null) {
Registration registration = FenixFramework.getDomainObject(request.getParameter("registrationId"));
return forwardToShow(registration, mapping, request);
} else {
if (((RegistrationsBean) getRenderedObject("bean")).getSelected() != null) {
return forwardToShow(((RegistrationsBean) getRenderedObject("bean")).getSelected(), mapping, request);
} else {
return prepare(mapping, form, request, response);
}
}
}
@EntryPoint
public ActionForward prepare(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception {
List<Registration> registrations = getUserView(request).getPerson().getStudent().getActiveRegistrations();
if (registrations.size() == 1) {
return forwardToShow(registrations.iterator().next(), mapping, request);
} else {
RegistrationsBean bean = new RegistrationsBean();
bean.setRegistrations(registrations);
request.setAttribute("bean", bean);
return mapping.findForward("chooseRegistration");
}
}
public ActionForward generateKey(ActionMapping mapping, ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception {
try {
UserPrivateKey.generateNewKeyForUser(Authenticate.getUser());
} catch (Exception E) {
throw new DomainException("error.impossible.to.generate.sha256.key");
}
return this.redirect("/ICalTimeTable.do?method=show®istrationId=" + request.getParameter("registrationId"), request);
}
private ActionForward forwardToShow(Registration registration, ActionMapping mapping, HttpServletRequest request)
throws Exception {
request.setAttribute("registrationId", registration.getExternalId());
UserPrivateKey privateKey = Authenticate.getUser().getPrivateKey();
if (privateKey != null && privateKey.getPrivateKeyValidity() != null
&& privateKey.getPrivateKeyValidity().isAfter(new DateTime())) {
if (privateKey.getPrivateKeyValidity() != null) {
request.setAttribute("expirationDate", privateKey.getPrivateKeyValidity().toString("dd/MM/yyyy HH:mm"));
request.setAttribute("user", Authenticate.getUser().getUsername());
request.setAttribute("classURL", getUrl("syncClasses", registration, request));
request.setAttribute("examsURL", getUrl("syncExams", registration, request));
}
request.setAttribute("stillValid", true);
} else {
request.setAttribute("stillValid", false);
request.setAttribute("payload", "");
}
return mapping.findForward("viewOptions");
}
public static String calculatePayload(String to, Registration reg, User user) throws Exception {
Cipher cipher = Cipher.getInstance("AES");
SecretKeySpec skeySpec = new SecretKeySpec(user.getPrivateKey().getPrivateKey(), "AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted =
cipher.doFinal(("This is for " + to + " calendar ##" + "1.6180339##Sistema Fenix##"
+ user.getPrivateKey().getPrivateKeyCreation().toString() + "##" + reg.getExternalId() + "##"
+ user.getPrivateKey().getPrivateKeyValidity().toString() + "##" + "## This is for " + to + " calendar")
.getBytes());
return Hashing.sha1().hashBytes(encrypted).toString();
}
public static String getUrl(String to, Registration registration, HttpServletRequest request) throws Exception {
try {
String scheme = request.getScheme();
String serverName = request.getServerName();
int serverPort = request.getServerPort();
String url =
scheme + "://" + serverName + ((serverPort == 80 || serverPort == 443) ? "" : ":" + serverPort)
+ request.getContextPath();
url +=
"/external/iCalendarSync.do?method=" + to + "&user=" + Authenticate.getUser().getUsername() + ""
+ "®istrationID=" + registration.getExternalId() + "&payload="
+ calculatePayload(to, registration, Authenticate.getUser());
return url;
} catch (Exception e) {
return null;
}
}
}