src/java/org/mxchange/jfinancials/validator/emailaddress/employee/FinancialsEmployeeEmailAddressValidator.java

   1 /*
   2  * Copyright (C) 2016 - 2022 Free Software Foundation
   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.jfinancials.validator.emailaddress.employee;
  18
  19 import java.text.MessageFormat;
  20 import java.util.regex.Pattern;
  21 import javax.enterprise.inject.spi.CDI;
  22 import javax.faces.application.FacesMessage;
  23 import javax.faces.component.UIComponent;
  24 import javax.faces.context.FacesContext;
  25 import javax.faces.validator.FacesValidator;
  26 import javax.faces.validator.ValidatorException;
  27 import org.mxchange.jcoreee.validator.string.BaseStringValidator;
  28 import org.mxchange.jfinancials.beans.business.employee.list.FinancialsEmployeeListWebViewBean;
  29 import org.mxchange.jfinancials.beans.business.employee.list.FinancialsEmployeeListWebViewController;
  30
  31 /**
  32  * A validator for employee email address validation
  33  * <p>
  34  * @author Roland Häder<roland@mxchange.org>
  35  */
  36 @FacesValidator (value = "EmployeeEmailAddressValidator")
  37 public class FinancialsEmployeeEmailAddressValidator extends BaseStringValidator {
  38
  39         /**
  40          * Email pattern
  41          */
  42         private static final String EMAIL_REGEX = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$"; //NOI18N
  43
  44         /**
  45          * Employee backing bean
  46          */
  47         private static FinancialsEmployeeListWebViewController EMPLOYEE_LIST_CONTROLLER;
  48
  49         /**
  50          * Pattern matcher
  51          */
  52         private static final Pattern PATTERN_MATCHER = Pattern.compile(FinancialsEmployeeEmailAddressValidator.EMAIL_REGEX);
  53
  54         /**
  55          * Serial number
  56          */
  57         private static final long serialVersionUID = 187_536_745_607_196L;
  58
  59         @Override
  60         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
  61                 // Validate parameter
  62                 if (null == context) {
  63                         // Throw NPE
  64                         throw new NullPointerException("Parameter context is null"); //NOI18N
  65                 } else if (null == component) {
  66                         // Throw NPE again
  67                         throw new NullPointerException("Parameter component is null"); //NOI18N
  68                 }
  69
  70                 // The required field
  71                 final String[] requiredFields = {"employeeEmailAddress"}; //NOI18N
  72
  73                 // Pre-validation (example: not null, not a string, empty string ...)
  74                 super.preValidate(context, component, value, requiredFields, Boolean.TRUE);
  75
  76                 // Is the email address empty and allowed?
  77                 if (null == value) {
  78                         // Then accept this here
  79                         return;
  80                 }
  81
  82                 // Get string from object ... ;-)
  83                 // @TODO Add IDN support (GNU lib?) Search for emailAddressRepeat
  84                 final String emailAddress = String.valueOf(value).trim();
  85
  86                 // Checks if the email address matches a regex ("low-level" check)
  87                 // @TODO Should also be done by <f:validatorRegex />)
  88                 final boolean matches = PATTERN_MATCHER.matcher(emailAddress).matches(); //NOI18N
  89
  90                 // Is the email address valid?
  91                 if (!matches) {
  92                         // Generate message
  93                         String message = MessageFormat.format("Email address {0} does not match regular expression.", emailAddress); //NOI18N
  94
  95                         // Not matching
  96                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_WARN, message, message));
  97                 }
  98
  99                 // Get client id (aka form id)
 100                 final String clientId = component.getClientId();
 101
 102                 // Is the instance there?
 103                 if (null == EMPLOYEE_LIST_CONTROLLER) {
 104                         // Get bean from CDI directly
 105                         EMPLOYEE_LIST_CONTROLLER = CDI.current().select(FinancialsEmployeeListWebViewBean.class).get();
 106                 }
 107
 108                 // Is it registered?
 109                 final Boolean isRegistered = EMPLOYEE_LIST_CONTROLLER.isEmailAddressRegistered(emailAddress);
 110
 111                 // Is the email address already registered?
 112                 if ((!clientId.endsWith("resendEmailAddress")) && (isRegistered)) { //NOI18N
 113                         // Generate message
 114                         final String message = MessageFormat.format("Email address {0} is already registered.", emailAddress); //NOI18N
 115
 116                         // No, then abort here
 117                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_INFO, message, message));
 118                 } else if ((clientId.endsWith("resendEmailAddress")) && (!isRegistered)) { //NOI18N
 119                         // Generate message
 120                         final String message = MessageFormat.format("Email address {0} is not registered.", emailAddress); //NOI18N
 121
 122                         // No, then abort here
 123                         throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_INFO, message, message));
 124                 }
 125         }
 126
 127 }