content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library 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 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * For further information about Alkacon Software GmbH & Co. KG, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.security;
  
  import org.opencms.main.CmsIllegalArgumentException;
  import org.opencms.util.CmsStringUtil;
  
  import java.util.Locale;
  
  /**
   * Default implementation for the validation handler.<p>
   *
   * @since 6.3.0
   */
  public class CmsDefaultValidationHandler implements I_CmsValidationHandler {
  
      /** The email regular expression. */
      public static final String EMAIL_REGEX = "\\A[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9äöüÄÖÜ](?:[a-z0-9äöüÄÖÜ-]*[a-z0-9äöüÄÖÜ])?\\.)+[a-z0-9äöüÄÖÜ](?:[a-z0-9äöüÄÖÜ-]*[a-z0-9äöüÄÖÜ])?\\z";
  
      /** The user name constraints. */
      public static final String USERNAME_CONSTRAINTS = "-._~$@";
  
      /** The zipcode regular expression. */
      public static final String ZIPCODE_REGEX = "[\\w]*";
  
      /**
       * The email should only be composed by digits and standard english letters, points,
       * underscores and exact one "At" symbol.<p>
       *
       * @see org.opencms.security.I_CmsValidationHandler#checkEmail(java.lang.String)
       */
      public void checkEmail(String email) throws CmsIllegalArgumentException {
  
          if (CmsStringUtil.isNotEmpty(email)) {
              email = email.trim();
              email = email.toLowerCase(Locale.ROOT);
          }
          if (!CmsStringUtil.validateRegex(email, EMAIL_REGEX, false)) {
              throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_EMAIL_VALIDATION_1, email));
          }
      }
  
      /**
       * @see org.opencms.security.I_CmsValidationHandler#checkFirstname(java.lang.String)
       */
      public void checkFirstname(String firstname) throws CmsIllegalArgumentException {
  
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(firstname)) {
              throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_FIRSTNAME_EMPTY_0));
          }
      }
  
      /**
       * @see org.opencms.security.I_CmsValidationHandler#checkGroupName(java.lang.String)
       */
      public void checkGroupName(String name) throws CmsIllegalArgumentException {
  
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(name)) {
              throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_BAD_GROUPNAME_EMPTY_0));
          }
      }
  
      /**
       * @see org.opencms.security.I_CmsValidationHandler#checkLastname(java.lang.String)
       */
      public void checkLastname(String lastname) throws CmsIllegalArgumentException {
  
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(lastname)) {
              throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_LASTNAME_EMPTY_0));
          }
      }
  
      /**
       * A user name can only be composed of digits,
       * standard ASCII letters and the symbols defined in {@link #USERNAME_CONSTRAINTS}.<p>
       *
       * @see org.opencms.security.I_CmsValidationHandler#checkUserName(java.lang.String)
       */
      public void checkUserName(String userName) throws CmsIllegalArgumentException {
  
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(userName)) {
              throw new CmsIllegalArgumentException(
                  Messages.get().container(Messages.ERR_BAD_USERNAME_EMPTY_0, userName));
          }
  
          CmsStringUtil.checkName(userName, USERNAME_CONSTRAINTS, Messages.ERR_BAD_USERNAME_4, Messages.get());
      }
  
      /**
       * That means, the parameter should only be composed by digits and standard english letters.<p>
       *
       * @see org.opencms.security.I_CmsValidationHandler#checkZipCode(java.lang.String)
       */
      public void checkZipCode(String zipcode) throws CmsIllegalArgumentException {
  
          if (!CmsStringUtil.validateRegex(zipcode, ZIPCODE_REGEX, true)) {
              throw new CmsIllegalArgumentException(Messages.get().container(Messages.ERR_ZIPCODE_VALIDATION_1, zipcode));
          }
      }
  
  }