content: /*
   * Copyright 2017-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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.activiti.cloud.services.identity.keycloak;
  
  import java.security.Principal;
  import java.util.Collections;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Collectors;
  import org.activiti.api.runtime.shared.security.PrincipalGroupsProvider;
  import org.activiti.api.runtime.shared.security.PrincipalRolesProvider;
  import org.activiti.cloud.services.identity.keycloak.client.KeycloakClient;
  import org.activiti.cloud.services.identity.keycloak.model.KeycloakGroup;
  import org.activiti.cloud.services.identity.keycloak.model.KeycloakRoleMapping;
  
  public class KeycloakClientPrincipalDetailsProvider implements PrincipalGroupsProvider, PrincipalRolesProvider {
  
      private final KeycloakClient keycloakClient;
  
      public KeycloakClientPrincipalDetailsProvider(KeycloakClient keycloakClient) {
          this.keycloakClient = keycloakClient;
      }
  
      @Override
      public List<String> getGroups(Principal principal) {
          return keycloakClient
              .getUserGroups(subjectId(principal))
              .stream()
              .map(KeycloakGroup::getName)
              .collect(Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList));
      }
  
      @Override
      public List<String> getRoles(Principal principal) {
          return keycloakClient
              .getUserRoleMapping(subjectId(principal))
              .stream()
              .map(KeycloakRoleMapping::getName)
              .collect(Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList));
      }
  
      protected String subjectId(Principal principal) {
          return Optional.of(principal).map(Principal::getName).orElseThrow(this::securityException);
      }
  
      protected SecurityException securityException() {
          return new SecurityException("Invalid Keycloak principal subject id");
      }
  }
  