content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache 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.apache.org/licenses/LICENSE-2.0
   *
   *  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.apache.causeway.viewer.wicket.ui.pages.accmngt;
  
  import org.apache.wicket.validation.IValidatable;
  import org.apache.wicket.validation.ValidationError;
  
  import org.apache.causeway.applib.services.iactnlayer.InteractionService;
  import org.apache.causeway.applib.services.userreg.UserRegistrationService;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.viewer.wicket.ui.validation.ValidatorBase;
  
  /**
   * Validates that an email is or is not already in use by another user
   */
  public class EmailAvailableValidator extends ValidatorBase<String> {
  
      private static final long serialVersionUID = 1L;
  
      public static EmailAvailableValidator exists(final MetaModelContext commonContext) {
          return new EmailAvailableValidator(commonContext, true, "noSuchUserByEmail");
      }
  
      public static EmailAvailableValidator doesntExist(final MetaModelContext commonContext) {
          return new EmailAvailableValidator(commonContext, false, "emailIsNotAvailable");
      }
  
      private final boolean emailExists;
      private final String resourceKey;
  
      private EmailAvailableValidator(
              final MetaModelContext commonContext,
              final boolean emailExists,
              final String resourceKey) {
  
          super();
          this.emailExists = emailExists;
          this.resourceKey = resourceKey;
      }
  
      @Override
      public void validate(final IValidatable<String> validatable) {
  
          var userRegistrationService = super.getMetaModelContext()
                  .lookupServiceElseFail(UserRegistrationService.class);
  
          var interactionService = super.getMetaModelContext()
                  .lookupServiceElseFail(InteractionService.class);
  
          interactionService.runAnonymous(() -> {
              String email = validatable.getValue();
              boolean emailExists1 = userRegistrationService.emailExists(email);
              if (emailExists1 != emailExists) {
                  validatable.error(new ValidationError().addKey(resourceKey));
              }
          });
  
      }
  
  }
  