src/java/org/mxchange/jusercore/model/email_address/AddressbookUserEmailChangeSessionBean.java

   1 /*
   2  * Copyright (C) 2016, 2017 Roland Häder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jusercore.model.email_address;
  18
  19 import java.text.MessageFormat;
  20 import java.util.GregorianCalendar;
  21 import java.util.List;
  22 import javax.ejb.EJB;
  23 import javax.ejb.EJBException;
  24 import javax.ejb.Stateless;
  25 import javax.mail.Address;
  26 import javax.mail.internet.AddressException;
  27 import javax.mail.internet.InternetAddress;
  28 import javax.persistence.NoResultException;
  29 import javax.persistence.Query;
  30 import org.mxchange.addressbook.database.BaseAddressbookDatabaseBean;
  31 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  32 import org.mxchange.jusercore.model.user.UserUtils;
  33
  34 /**
  35  * A session-scoped bean for changing email addresses
  36  * <p>
  37  * @author Roland Häder<roland@mxchange.org>
  38  */
  39 @Stateless (name = "userEmailChange", description = "A bean handling user email changes")
  40 public class AddressbookUserEmailChangeSessionBean extends BaseAddressbookDatabaseBean implements UserEmailChangeSessionBeanRemote {
  41
  42         /**
  43          * Serial number
  44          */
  45         private static final long serialVersionUID = 182_698_165_971_548L;
  46
  47         /**
  48          * User bean
  49          */
  50         @EJB
  51         private UserSessionBeanRemote userBean;
  52
  53         /**
  54          * Default constructor
  55          */
  56         public AddressbookUserEmailChangeSessionBean () {
  57         }
  58
  59         @Override
  60         @SuppressWarnings ("unchecked")
  61         public List<String> allQueuedAddresses () {
  62                 // Trace message
  63                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allQueuedAddresses: CALLED!", this.getClass().getSimpleName())); //NOI18N
  64
  65                 // Get named query
  66                 Query query = this.getEntityManager().createNamedQuery("AllEmailAddressChanges", String.class); //NOI18N
  67
  68                 // Get all entries
  69                 List<String> emailAddresses = query.getResultList();
  70
  71                 // Trace message
  72                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allQueuedAddresses: emailAddresses.size()={1} - EXIT!", this.getClass().getSimpleName(), emailAddresses.size())); //NOI18N
  73
  74                 // Return it
  75                 return emailAddresses;
  76         }
  77
  78         @Override
  79         public void enqueueEmailAddressForChange (final ChangeableEmailAddress emailChange, final String baseUrl) {
  80                 // Trace message
  81                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.enqueueEmailAddressForChange: emailChange={1},baseUrl={2} - CALLED!", this.getClass().getSimpleName(), emailChange, baseUrl)); //NOI18N
  82
  83                 // Email address change should be valid
  84                 if (null == emailChange) {
  85                         // Abort here
  86                         throw new NullPointerException("emailChange is null"); //NOI18N
  87                 } else if (emailChange.getEmailChangeUser() == null) {
  88                         // Throw NPE again
  89                         throw new NullPointerException("emailChange.emailChangeUser is null"); //NOI18N
  90                 } else if (emailChange.getEmailChangeUser().getUserId() == null) {
  91                         // Throw NPE again
  92                         throw new NullPointerException("emailChange.emailChangeUser.userId is null"); //NOI18N
  93                 } else if (emailChange.getEmailChangeUser().getUserId() < 1) {
  94                         // Not valid id
  95                         throw new IllegalArgumentException(MessageFormat.format("emailChange.emailChangeUser.userId={0} is invalid.", emailChange.getEmailChangeUser().getUserId())); //NOI18N
  96                 } else if (!this.userBean.ifUserExists(emailChange.getEmailChangeUser())) {
  97                         // User does not exist
  98                         throw new EJBException(MessageFormat.format("Email change with id {0} does not exist.", emailChange.getEmailChangeId())); //NOI18N
  99                 } else if (emailChange.getEmailAddress().trim().isEmpty()) {
 100                         // Email address is empty
 101                         throw new IllegalArgumentException("emailChange.emaiLAddress is empty."); //NOI18N
 102                 } else if (this.isEmailAddressEnqueued(emailChange.getEmailAddress())) {
 103                         // Email address is already enqueued
 104                         throw new EJBException(MessageFormat.format("Email address {0} is already enqueued.", emailChange.getEmailAddress())); //NOI18N
 105                 }
 106
 107                 // The email change is not (yet) there, add secure hash and "created" timestamp
 108                 emailChange.setEmailChangeCreated(new GregorianCalendar());
 109                 this.generateSecureHash(emailChange);
 110
 111                 // Persist it
 112                 //@TODO Fix email delivery then allow this: this.getEntityManager().persist(emailChange);
 113                 // Init variable
 114                 Address emailAddress;
 115
 116                 try {
 117                         // Create email address and set
 118                         emailAddress = new InternetAddress(emailChange.getEmailAddress());
 119                 } catch (final AddressException ex) {
 120                         // Throw again
 121                         throw new EJBException(ex);
 122                 }
 123
 124                 // Send email
 125                 this.sendEmail("Email change", "email_change", emailAddress, emailChange.getEmailChangeUser(), baseUrl); //NOI18N
 126
 127                 // Trace message
 128                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.enqueueEmailAddressForChange - EXIT!", this.getClass().getSimpleName())); //NOI18N
 129         }
 130
 131         @Override
 132         public boolean isEmailAddressEnqueued (final String emailAddress) {
 133                 // Trace message
 134                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.isEmailAddressEnqueued: emailAddress={1} - CALLED!", this.getClass().getSimpleName(), emailAddress)); //NOI18N
 135
 136                 // Create query instance
 137                 Query query = this.getEntityManager().createNamedQuery("SearchEmailChangeByEmail"); //NOI18N
 138
 139                 // Add email address as parameter
 140                 query.setParameter("email", emailAddress); //NOI18N
 141
 142                 // Initialize variable
 143                 boolean isFound = false;
 144
 145                 // Try it
 146                 try {
 147                         // Try to get single result
 148                         ChangeableEmailAddress dummy = (ChangeableEmailAddress) query.getSingleResult();
 149
 150                         // Found it
 151                         isFound = true;
 152                 } catch (final NoResultException ex) {
 153                         // Log it
 154                         this.getLoggerBeanLocal().logException(ex);
 155                 }
 156
 157                 // Trace message
 158                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.isEmailAddressEnqueued: isFound={1} - EXIT!", this.getClass().getSimpleName(), isFound)); //NOI18N
 159
 160                 // Return it
 161                 return isFound;
 162         }
 163
 164         @Override
 165         public void updateEmailAddress (final ChangeableEmailAddress emailAddress) {
 166                 // Trace message
 167                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.updateEmailAddress: emailAddress={1} - CALLED!", this.getClass().getSimpleName(), emailAddress)); //NOI18N
 168
 169                 // Email address change should be valid
 170                 if (null == emailAddress) {
 171                         // Abort here
 172                         throw new NullPointerException("emailAddress is null"); //NOI18N
 173                 } else if (emailAddress.getEmailChangeId() == null) {
 174                         // Throw NPE again
 175                         throw new NullPointerException("emailAddress.emailChangeId is null"); //NOI18N
 176                 } else if (emailAddress.getEmailChangeId() < 1) {
 177                         // Not valid
 178                         throw new IllegalArgumentException(MessageFormat.format("emailAddress.emailChangeId={0} is not valid.", emailAddress.getEmailChangeId())); //NOI18N
 179                 } else if (emailAddress.getEmailAddress().trim().isEmpty()) {
 180                         // Email address is empty
 181                         throw new IllegalArgumentException("emailAddress.emaiLAddress is empty."); //NOI18N
 182                 } else if (!this.userBean.ifUserExists(emailAddress.getEmailChangeUser())) {
 183                         // User does not exist
 184                         throw new EJBException(MessageFormat.format("Email change with id {0} does not exist.", emailAddress.getEmailChangeId())); //NOI18N
 185                 } else if (!this.isEmailAddressEnqueued(emailAddress.getEmailAddress())) {
 186                         // Email address is not enqueued
 187                         throw new EJBException(MessageFormat.format("Email address {0} is not enqueued.", emailAddress.getEmailAddress())); //NOI18N
 188                 }
 189
 190                 throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
 191         }
 192
 193         /**
 194          * Generates a secure, unique hash for given email address change. This
 195          * requires to check if the hash is really not there.
 196          * <p>
 197          * @param emailAddress Email address change
 198          */
 199         private void generateSecureHash (final ChangeableEmailAddress emailAddress) {
 200                 // Email address change should be valid
 201                 if (null == emailAddress) {
 202                         // Abort here
 203                         throw new NullPointerException("emailAddress is null"); //NOI18N
 204                 } else if (emailAddress.getEmailAddress().trim().isEmpty()) {
 205                         // Email address is empty
 206                         throw new IllegalArgumentException("emailAddress.emaiLAddress is empty."); //NOI18N
 207                 }
 208
 209                 // Initialize loop with null
 210                 String hash = null;
 211
 212                 // Default is not used
 213                 boolean isUsed = true;
 214
 215                 // Search for free hash
 216                 while (isUsed) {
 217                         // Generate hash, there is already in UserUtils a nice method that can be used for this purpose.
 218                         hash = UserUtils.encryptPassword(String.format("%s:%s", emailAddress.getEmailAddress(), emailAddress.toString())); //NOI18N
 219
 220                         // The hash *may* be unique, better test it
 221                         Query query = this.getEntityManager().createNamedQuery("SearchEmailChangeByHash", EmailAddressChange.class); //NOI18N
 222
 223                         // Set hash as parameter
 224                         query.setParameter("hash", hash); //NOI18N
 225
 226                         // Try to get single result
 227                         try {
 228                                 // Get single result
 229                                 ChangeableEmailAddress dummy = (ChangeableEmailAddress) query.getSingleResult();
 230                         } catch (final NoResultException ex) {
 231                                 // Not found
 232                                 isUsed = false;
 233                         }
 234                 }
 235
 236                 // hash should not be null and set
 237                 assert (hash != null) : "hash is null"; //NOI18N
 238                 assert (!hash.isEmpty()) : "hash is empty"; //NOI18N
 239
 240                 // Set it in email change
 241                 emailAddress.setEmailChangeHash(hash);
 242         }
 243
 244 }