Java tutorial
/* * UniTime 3.4 - 3.5 (University Timetabling Application) * Copyright (C) 2012 - 2013, UniTime LLC, and individual contributors * as indicated by the @authors tag. * * 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 3 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, see <http://www.gnu.org/licenses/>. * */ package org.unitime.timetable.events; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.io.StringWriter; import java.io.UnsupportedEncodingException; import java.util.Date; import java.util.HashMap; import java.util.HashSet; import java.util.Hashtable; import java.util.List; import java.util.Map; import java.util.Set; import java.util.TimeZone; import java.util.TreeSet; import javax.activation.DataSource; import javax.mail.MessagingException; import javax.mail.internet.InternetAddress; import org.apache.commons.fileupload.FileItem; import org.apache.log4j.Logger; import org.hibernate.type.LongType; import org.unitime.commons.Email; import org.unitime.localization.impl.Localization; import org.unitime.timetable.defaults.ApplicationProperty; import org.unitime.timetable.defaults.UserProperty; import org.unitime.timetable.export.events.EventsExportEventsToICal; import org.unitime.timetable.gwt.resources.GwtConstants; import org.unitime.timetable.gwt.resources.GwtMessages; import org.unitime.timetable.gwt.server.UploadServlet; import org.unitime.timetable.gwt.shared.EventInterface; import org.unitime.timetable.gwt.shared.EventInterface.ApproveEventRpcRequest; import org.unitime.timetable.gwt.shared.EventInterface.ContactInterface; import org.unitime.timetable.gwt.shared.EventInterface.MeetingInterface; import org.unitime.timetable.gwt.shared.EventInterface.MultiMeetingInterface; import org.unitime.timetable.gwt.shared.EventInterface.SaveOrApproveEventRpcRequest; import org.unitime.timetable.gwt.shared.EventInterface.SaveOrApproveEventRpcResponse; import org.unitime.timetable.model.Event; import org.unitime.timetable.model.Meeting; import org.unitime.timetable.model.Session; import org.unitime.timetable.model.TimetableManager; import org.unitime.timetable.model.dao.SessionDAO; import org.unitime.timetable.security.SessionContext; import org.unitime.timetable.security.rights.Right; import org.unitime.timetable.util.Constants; import org.unitime.timetable.util.NameFormat; import biweekly.Biweekly; import biweekly.ICalendar; import biweekly.property.CalendarScale; import biweekly.property.Method; import biweekly.property.Status; import biweekly.property.Version; import freemarker.template.Configuration; import freemarker.template.Template; import freemarker.template.TemplateException; /** * @author Tomas Muller */ public class EventEmail { protected static GwtMessages MESSAGES = Localization.create(GwtMessages.class); protected static GwtConstants CONSTANTS = Localization.create(GwtConstants.class); protected static Map<Long, String> sMessageId = new Hashtable<Long, String>(); private static Logger sLog = Logger.getLogger(EventEmail.class); private SaveOrApproveEventRpcRequest iRequest = null; private SaveOrApproveEventRpcResponse iResponse = null; private DataSource iAttachment = null; private InternetAddress iReplyTo = null; public EventEmail(SaveOrApproveEventRpcRequest request, SaveOrApproveEventRpcResponse response, DataSource attachment, InternetAddress replyTo) { iRequest = request; iResponse = response; iAttachment = attachment; iReplyTo = replyTo; } public EventEmail(SaveOrApproveEventRpcRequest request, SaveOrApproveEventRpcResponse response) { this(request, response, null, null); } public EventEmail() { } public SaveOrApproveEventRpcRequest request() { return iRequest; } public SaveOrApproveEventRpcResponse response() { return iResponse; } public DataSource attachment() { return iAttachment; } public InternetAddress replyTo() { return iReplyTo; } public void send(SessionContext context) throws UnsupportedEncodingException, MessagingException { try { if (!request().isEmailConfirmation()) return; if (ApplicationProperty.EmailConfirmationEvents.isFalse()) { response().info(MESSAGES.emailDisabled()); return; } Email email = Email.createEmail(); if (event().hasContact() && event().getContact().getEmail() != null && !event().getContact().getEmail().isEmpty()) email.addRecipient(event().getContact().getEmail(), event().getContact().getName(MESSAGES)); if (event().hasAdditionalContacts()) { for (ContactInterface contact : event().getAdditionalContacts()) { if (contact.getEmail() != null && !contact.getEmail().isEmpty()) email.addRecipient(contact.getEmail(), contact.getName(MESSAGES)); } } if (event().hasSponsor() && event().getSponsor().hasEmail()) email.addRecipientCC(event().getSponsor().getEmail(), event().getSponsor().getName()); if (event().hasEmail()) { String suffix = ApplicationProperty.EmailDefaultAddressSuffix.value(); for (String address : event().getEmail().split("[\n,]")) { if (!address.trim().isEmpty()) { if (suffix != null && address.indexOf('@') < 0) email.addRecipientCC(address.trim() + suffix, null); else email.addRecipientCC(address.trim(), null); } } } if (event().hasInstructors() && ApplicationProperty.EmailConfirmationEventInstructors.isTrue()) { for (ContactInterface contact : event().getInstructors()) { if (contact.getEmail() != null && !contact.getEmail().isEmpty()) email.addRecipientCC(contact.getEmail(), contact.getName(MESSAGES)); } } if (event().hasCoordinators() && ApplicationProperty.EmailConfirmationEventCoordinators.isTrue()) { for (ContactInterface contact : event().getCoordinators()) { if (contact.getEmail() != null && !contact.getEmail().isEmpty()) email.addRecipientCC(contact.getEmail(), contact.getName(MESSAGES)); } } if (ApplicationProperty.EmailConfirmationEventManagers.isTrue()) { Set<Long> locationIds = new HashSet<Long>(); if (event().hasMeetings()) { for (MeetingInterface m : event().getMeetings()) { if (m.hasLocation()) locationIds.add(m.getLocation().getId()); } } if (response().hasDeletedMeetings()) { for (MeetingInterface m : response().getDeletedMeetings()) if (m.hasLocation()) locationIds.add(m.getLocation().getId()); } org.hibernate.Session hibSession = SessionDAO.getInstance().getSession(); NameFormat nf = NameFormat.fromReference(context.getUser().getProperty(UserProperty.NameFormat)); for (TimetableManager m : (List<TimetableManager>) hibSession.createQuery( "select distinct m from Location l inner join l.eventDepartment.timetableManagers m inner join m.managerRoles r where " + "l.uniqueId in :locationIds and m.emailAddress is not null and r.receiveEmails = true and :permission in elements (r.role.rights)") .setParameterList("locationIds", locationIds, new LongType()) .setString("permission", Right.EventLookupContact.name()).list()) { email.addRecipientCC(m.getEmailAddress(), nf.format(m)); } } if (replyTo() != null) { email.setReplyTo(replyTo().getAddress(), replyTo().getPersonal()); } else if (context != null && context.isAuthenticated() && context.getUser().getEmail() != null) { email.setReplyTo(context.getUser().getEmail(), context.getUser().getName()); } else { email.setReplyTo(event().getContact().getEmail(), event().getContact().getName(MESSAGES)); } if (event().getId() != null && ApplicationProperty.InboundEmailsEnabled.isTrue() && ApplicationProperty.InboundEmailsReplyToAddress.value() != null) { email.setSubject("[EVENT-" + Long.toHexString(event().getId()) + "] " + event().getName() + " (" + event().getType().getName(CONSTANTS) + ")"); email.addReplyTo(ApplicationProperty.InboundEmailsReplyToAddress.value(), ApplicationProperty.InboundEmailsReplyToAddressName.value()); } else { email.setSubject(event().getName() + " (" + event().getType().getName(CONSTANTS) + ")"); } if (context != null) { final FileItem file = (FileItem) context.getAttribute(UploadServlet.SESSION_LAST_FILE); if (file != null) { email.addAttachement(new DataSource() { @Override public OutputStream getOutputStream() throws IOException { throw new IOException("No output stream."); } @Override public String getName() { return file.getName(); } @Override public InputStream getInputStream() throws IOException { return file.getInputStream(); } @Override public String getContentType() { return file.getContentType(); } }); } } if (attachment() != null) email.addAttachement(attachment()); final String ical = icalendar(); if (ical != null) { email.addAttachement(new DataSource() { @Override public OutputStream getOutputStream() throws IOException { throw new IOException("No output stream."); } @Override public String getName() { return "event.ics"; } @Override public InputStream getInputStream() throws IOException { return new ByteArrayInputStream(ical.getBytes("UTF-8")); } @Override public String getContentType() { return "text/calendar; charset=UTF-8"; } }); } email.setHTML(message()); Long eventId = (response().hasEventWithId() ? response().getEvent().getId() : request().getEvent().getId()); if (eventId != null) { String messageId = sMessageId.get(eventId); if (messageId != null) email.setInReplyTo(messageId); } email.send(); if (eventId != null) { String messageId = email.getMessageId(); if (messageId != null) sMessageId.put(eventId, messageId); } response().info(MESSAGES.infoConfirmationEmailSent( event().hasContact() ? event().getContact().getName(MESSAGES) : "?")); } catch (Exception e) { response().error(MESSAGES.failedToSendConfirmationEmail(e.getMessage())); sLog.warn(MESSAGES.failedToSendConfirmationEmail(e.getMessage()), e); } } private EventInterface event() { return response().getEvent() != null ? response().getEvent() : request().getEvent(); } private String subject() { switch (request().getOperation()) { case CREATE: return MESSAGES.emailSubjectCreate(event().getName()); case UPDATE: return MESSAGES.emailSubjectUpdate(event().getName()); case DELETE: return MESSAGES.emailSubjectDelete(event().getName()); case APPROVE: return MESSAGES.emailSubjectApprove(event().getName()); case INQUIRE: return MESSAGES.emailSubjectInquire(event().getName()); case REJECT: return MESSAGES.emailSubjectReject(event().getName()); case CANCEL: return MESSAGES.emailSubjectCancel(event().getName()); default: return MESSAGES.emailSubjectUpdate(event().getName()); } } private String message() throws IOException, TemplateException { Configuration cfg = new Configuration(); cfg.setClassForTemplateLoading(EventEmail.class, ""); cfg.setLocale(Localization.getJavaLocale()); cfg.setOutputEncoding("utf-8"); Template template = cfg.getTemplate("confirmation.ftl"); Map<String, Object> input = new HashMap<String, Object>(); input.put("msg", MESSAGES); input.put("const", CONSTANTS); input.put("subject", subject()); input.put("event", event()); input.put("operation", request().getOperation() == null ? "NONE" : request().getOperation().name()); if (response().hasCreatedMeetings()) input.put("created", EventInterface.getMultiMeetings(response().getCreatedMeetings(), true)); if (response().hasDeletedMeetings()) input.put("deleted", EventInterface.getMultiMeetings(response().getDeletedMeetings(), true)); if (response().hasCancelledMeetings()) input.put("cancelled", EventInterface.getMultiMeetings(response().getCancelledMeetings(), true)); if (response().hasUpdatedMeetings()) input.put("updated", EventInterface.getMultiMeetings(response().getUpdatedMeetings(), true)); if (request().hasMessage()) input.put("message", request().getMessage()); if (request().getEvent().getId() != null) { if (event().hasMeetings()) input.put("meetings", EventInterface.getMultiMeetings(event().getMeetings(), true)); else input.put("meetings", new TreeSet<MultiMeetingInterface>()); } input.put("version", MESSAGES.pageVersion(Constants.getVersion(), Constants.getReleaseDate())); input.put("ts", new Date()); StringWriter s = new StringWriter(); template.process(input, new PrintWriter(s)); s.flush(); s.close(); return s.toString(); } public String icalendar() throws IOException { ICalendar ical = new ICalendar(); ical.setVersion(Version.v2_0()); ical.setCalendarScale(CalendarScale.gregorian()); ical.setMethod(new Method("PUBLISH")); ical.setExperimentalProperty("X-WR-CALNAME", "UniTime Schedule"); ical.setExperimentalProperty("X-WR-TIMEZONE", TimeZone.getDefault().getID()); ical.setProductId("-//UniTime LLC/UniTime " + Constants.getVersion() + " Events//EN"); boolean exp = new EventsExportEventsToICal().print(ical, response().hasEventWithId() && response().getEvent().hasMeetings() ? response().getEvent() : request().getEvent(), response().hasEventWithId() && response().getEvent().hasMeetings() ? null : Status.cancelled()); return (exp ? Biweekly.write(ical).go() : null); } public static void eventExpired(Event cancelledEvent, Set<Meeting> cancelledMeetings) throws Exception { if (ApplicationProperty.EmailConfirmationEvents.isFalse()) return; Session session = cancelledEvent.getSession(); if (session == null) for (Meeting m : cancelledEvent.getMeetings()) if (m.getLocation() != null) { session = m.getLocation().getSession(); break; } EventInterface event = EventDetailBackend.getEventDetail(session, cancelledEvent, null); ApproveEventRpcRequest request = new ApproveEventRpcRequest(); request.setOperation(SaveOrApproveEventRpcRequest.Operation.CANCEL); request.setMessage(MESSAGES.noteEventExpired()); request.setEmailConfirmation(true); request.setSessionId(session == null ? null : session.getUniqueId()); request.setEvent(event); SaveOrApproveEventRpcResponse response = new SaveOrApproveEventRpcResponse(); response.setEvent(event); for (Meeting metting : cancelledMeetings) for (MeetingInterface m : event.getMeetings()) if (m.getId().equals(metting.getUniqueId())) response.addUpdatedMeeting(m); new EventEmail(request, response).send(null); } public static void eventUpdated(Event updatedEvent, String message, InternetAddress replyTo, DataSource attachment) throws Exception { if (ApplicationProperty.EmailConfirmationEvents.isFalse()) return; Session session = updatedEvent.getSession(); if (session == null) for (Meeting m : updatedEvent.getMeetings()) if (m.getLocation() != null) { session = m.getLocation().getSession(); break; } EventInterface event = EventDetailBackend.getEventDetail(session, updatedEvent, null); ApproveEventRpcRequest request = new ApproveEventRpcRequest(); request.setOperation(SaveOrApproveEventRpcRequest.Operation.UPDATE); if (message != null && !message.isEmpty()) request.setMessage(message); request.setEmailConfirmation(true); request.setSessionId(session == null ? null : session.getUniqueId()); request.setEvent(event); SaveOrApproveEventRpcResponse response = new SaveOrApproveEventRpcResponse(); response.setEvent(event); new EventEmail(request, response, attachment, replyTo).send(null); } }