/*

  * Copyright 2007-2008 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.krad.service.impl;

 import java.util.ArrayList;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.mail.MailMessage;

 import org.kuali.rice.core.mail.Mailer;

 import org.kuali.rice.kim.bo.Person;

 import org.kuali.rice.krad.exception.ExceptionIncident;

 import org.kuali.rice.krad.exception.KualiExceptionIncident;

 import org.kuali.rice.krad.service.KRADServiceLocator;

 import org.kuali.rice.krad.service.KualiExceptionIncidentService;

 import org.kuali.rice.krad.util.GlobalVariables;

 import org.kuali.rice.krad.util.KRADConstants;

 /**

  * This is a basic implementation of the KualiReporterService. Currently, it only has

  * a mail service as reporting mechanism.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public class KualiExceptionIncidentServiceImpl implements KualiExceptionIncidentService {

     private Logger LOG=Logger.getLogger(KualiExceptionIncidentServiceImpl.class);

     /**

      * An list to send incident emails to.

      */

     private String incidentMailingList;

     /**

      * This property must be defined in the base configuration file for specifying

      * the mailing list for the report to be sent.

      * <p>Example:

      * <code>

      * <param name="KualiReporterServiceImpl.REPORT_MAIL_LIST">a@y,b@z</param>

      * </code>

      */

     public static final String REPORT_MAIL_LIST=String.format(

             "%s.REPORT_MAIL_LIST",KualiExceptionIncidentServiceImpl.class.getSimpleName());

     /**

      * A Mailer for sending report.

      */

     private Mailer mailer;

     /**

      * The injected Mailer.

      * @param mailService the mailService to set

      */

     public final void setMailer(Mailer mailer) {

         this.mailer = mailer;

     }

     /**

      * An email template is used to construct an email to be sent by the mail service.

      */

     private MailMessage messageTemplate;

     /**

      * This mails the report using the mail service from the mail template.

      * 

      * @see org.kuali.rice.krad.service.KualiExceptionIncidentService#emailReport(java.lang.String, java.lang.String)

      */

     @Override

         public void emailReport(String subject, String message) throws Exception {

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s;%s",

                     (subject==null)?"null":subject.toString(),

                     (message==null)?"null":message.toString());

             LOG.trace(lm);

         }

         if (mailer == null) {

             String errorMessage = "mailer property of KualiExceptionIncidentServiceImpl is null";

             LOG.fatal(errorMessage);

             throw new IllegalStateException(errorMessage);

         }

         // Send mail

         MailMessage msg=createMailMessage(subject, message);

         mailer.sendEmail(msg);

         if (LOG.isTraceEnabled()) {

             LOG.trace("EXIT");

         }

     }

     /**

      * This method create an instance of MailMessage from the inputs using the given

      * template.

      * 

      * @param subject

      * @param message

      * @return

      * @exception

      */

     @SuppressWarnings("unchecked")

     private MailMessage createMailMessage(String subject, String message)

                 throws Exception{

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s%n%s",

                     (subject==null)?"null":subject.toString(),

                     (message==null)?"null":message.toString());

             LOG.trace(lm);

         }

         if (messageTemplate == null) {

             throw new IllegalStateException(String.format(

                     "%s.templateMessage is null or not set",

                     this.getClass().getName()));

         }

         // Copy input message reference for creating an instance of mail message

         MailMessage msg=new MailMessage();

         Person actualUser = GlobalVariables.getUserSession().getPerson();

         String fromEmail = actualUser.getEmailAddress();

         if ((fromEmail != null) && (fromEmail != "")) {

                 msg.setFromAddress(fromEmail);

             } else {

                 msg.setFromAddress(messageTemplate.getFromAddress());

             }

         msg.setBccAddresses(messageTemplate.getBccAddresses());

         msg.setCcAddresses(messageTemplate.getCcAddresses());

         // First check if message template already define mailing list

         Set emails=messageTemplate.getToAddresses();

         if (emails == null || emails.isEmpty()) {

             String mailingList= KRADServiceLocator.getKualiConfigurationService().getPropertyString(REPORT_MAIL_LIST);

             if (mailingList == null || mailingList.trim().length() == 0) {

                 String em=REPORT_MAIL_LIST+" is not set or messageTemplate does not have ToAddresses already set.";

                 LOG.error(em);

                 throw new IllegalStateException(em);

             } else {

                 msg.setToAddresses(new HashSet<String>(split(mailingList,

                         KRADConstants.FIELD_CONVERSIONS_SEPARATOR)));

             }

         } else {

             msg.setToAddresses(emails);

         }

         // Set mail message subject

         msg.setSubject((subject==null)?"":subject);

         // Set mail message body

         msg.setMessage((message==null)?"":message);

         if (LOG.isTraceEnabled()) {

             String lm=String.format("EXIT %s",

                     (msg==null)?"null":msg.toString());

             LOG.trace(lm);

         }

         return msg;

     }

     /**

      * This overridden method send email to the specified list of addresses.

      * 

      * @see org.kuali.rice.krad.service.KualiExceptionIncidentService#report(org.kuali.rice.krad.exception.KualiExceptionIncident)

      */

     @Override

         public void report(KualiExceptionIncident exceptionIncident) throws Exception {

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s",

                     (exceptionIncident==null)?"null":exceptionIncident.toString());

             LOG.trace(lm);

         }

         emailReport(

                 exceptionIncident.getProperty(

                         KualiExceptionIncident.EXCEPTION_REPORT_SUBJECT),

                 exceptionIncident.getProperty(

                         KualiExceptionIncident.EXCEPTION_REPORT_MESSAGE));

         if (LOG.isTraceEnabled()) {

             String lm=String.format("EXIT");

             LOG.trace(lm);

         }

     }

     /**

      * This method first separate a composite string of the format

      * "string token string".

      * <p>Example: 1,2,a,b where ',' is the token

      * 

      * @param s

      * @param token

      * @return

      */

     public List<String> split(String s, String token) {

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s;%s", s, token);

             LOG.trace(lm);

         }

         String[] sarray=s.split(token);

         List<String> list=new ArrayList<String>();

         for (int i=0; i<sarray.length && sarray[i].length() > 0; i++) {

             list.add(sarray[i]);

         }

         if (LOG.isTraceEnabled()) {

             String lm=String.format("EXIT %s", list.toString());

             LOG.trace(lm);

         }

         return list;

     }

     /**

      * @return the messageTemplate

      */

     public final MailMessage getMessageTemplate() {

         return this.messageTemplate;

     }

     /**

      * @param messageTemplate the messageTemplate to set

      */

     public final void setMessageTemplate(MailMessage messageTemplate) {

         this.messageTemplate = messageTemplate;

     }

     /**

      * This overridden method create an instance of the KualiExceptionIncident.

      * 

      * @see org.kuali.rice.krad.service.KualiExceptionIncidentService#getExceptionIncident(

      * java.lang.Exception,java.util.Map)

      */

     @Override

         public KualiExceptionIncident getExceptionIncident(Exception exception,

             Map<String, String> properties) {

             if ( exception == null ) {

                     return getExceptionIncident(properties);

             }

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s;%s", exception.getMessage(),

                     properties.toString());

             LOG.trace(lm);

         }

         KualiExceptionIncident ei=new ExceptionIncident(exception, properties);

         if (LOG.isTraceEnabled()) {

             String lm=String.format("EXIT %s", ei.toProperties().toString());

             LOG.trace(lm);

         }

         return ei;

     }

     /**

      * This overridden method create an instance of ExceptionIncident from list of

      * name-value pairs as exception incident information.

      * 

      * @see org.kuali.rice.krad.service.KualiExceptionIncidentService#getExceptionIncident(java.util.Map)

      */

     @Override

         public KualiExceptionIncident getExceptionIncident(Map<String, String> properties) {

         if (LOG.isTraceEnabled()) {

             String lm=String.format("ENTRY %s", properties.toString());

             LOG.trace(lm);

         }

         ExceptionIncident ei=new ExceptionIncident(properties);

         if (LOG.isTraceEnabled()) {

             String lm=String.format("EXIT %s", ei.toProperties().toString());

             LOG.trace(lm);

         }

         return ei;

     }

         /**

          * @return the incidentMailingList

          */

         public String getIncidentMailingList() {

                 return this.incidentMailingList;

         }

         /**

          * @param incidentMailingList the incidentMailingList to set

          */

         public void setIncidentMailingList(String incidentMailingList) {

                 this.incidentMailingList = incidentMailingList;

         }

 }