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.query.events.handlers;
  
  import jakarta.persistence.EntityManager;
  import java.util.Optional;
  import org.activiti.api.task.model.TaskCandidateUser;
  import org.activiti.api.task.model.events.TaskCandidateUserEvent;
  import org.activiti.cloud.api.model.shared.events.CloudRuntimeEvent;
  import org.activiti.cloud.api.task.model.events.CloudTaskCandidateUserRemovedEvent;
  import org.activiti.cloud.services.query.model.TaskCandidateUserEntity;
  import org.activiti.cloud.services.query.model.TaskCandidateUserId;
  import org.activiti.cloud.services.query.model.TaskEntity;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class TaskCandidateUserRemovedEventHandler implements QueryEventHandler {
  
      private static Logger LOGGER = LoggerFactory.getLogger(TaskCandidateUserRemovedEventHandler.class);
      private final EntityManager entityManager;
      private final EntityManagerFinder entityManagerFinder;
  
      public TaskCandidateUserRemovedEventHandler(EntityManager entityManager, EntityManagerFinder entityManagerFinder) {
          this.entityManager = entityManager;
          this.entityManagerFinder = entityManagerFinder;
      }
  
      @Override
      public void handle(CloudRuntimeEvent<?, ?> event) {
          CloudTaskCandidateUserRemovedEvent taskCandidateUserRemovedEvent = (CloudTaskCandidateUserRemovedEvent) event;
          TaskCandidateUser taskCandidateUser = taskCandidateUserRemovedEvent.getEntity();
          Optional<TaskEntity> findResult = entityManagerFinder.findTaskWithCandidateUsers(taskCandidateUser.getTaskId());
          // if a task was cancelled / completed do not handle this event
          if (findResult.isPresent() && !findResult.get().isInFinalState()) {
              // Persist into database
              try {
                  TaskCandidateUserId id = new TaskCandidateUserId(
                      taskCandidateUser.getTaskId(),
                      taskCandidateUser.getUserId()
                  );
                  Optional
                      .ofNullable(entityManager.find(TaskCandidateUserEntity.class, id))
                      .ifPresent(entityManager::remove);
              } catch (Exception cause) {
                  LOGGER.debug("Error handling TaskCandidateUserRemovedEvent[" + event + "]", cause);
              }
          }
      }
  
      @Override
      public String getHandledEvent() {
          return TaskCandidateUserEvent.TaskCandidateUserEvents.TASK_CANDIDATE_USER_REMOVED.name();
      }
  }
  