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
   *
   *    https://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.bigtop.manager.server.command.validator;
  
  import org.apache.bigtop.manager.common.enums.Command;
  import org.apache.bigtop.manager.dao.po.ClusterPO;
  import org.apache.bigtop.manager.dao.po.HostPO;
  import org.apache.bigtop.manager.dao.repository.ClusterDao;
  import org.apache.bigtop.manager.dao.repository.HostDao;
  import org.apache.bigtop.manager.server.command.CommandIdentifier;
  import org.apache.bigtop.manager.server.enums.ApiExceptionEnum;
  import org.apache.bigtop.manager.server.enums.CommandLevel;
  import org.apache.bigtop.manager.server.exception.ApiException;
  import org.apache.bigtop.manager.server.model.dto.command.ClusterCommandDTO;
  
  import org.apache.commons.collections4.CollectionUtils;
  
  import org.springframework.stereotype.Component;
  
  import jakarta.annotation.Resource;
  import java.util.List;
  
  @Component
  public class ClusterAddValidator implements CommandValidator {
  
      @Resource
      private ClusterDao clusterDao;
  
      @Resource
      private HostDao hostDao;
  
      @Override
      public List<CommandIdentifier> getCommandIdentifiers() {
          return List.of(new CommandIdentifier(CommandLevel.CLUSTER, Command.ADD));
      }
  
      @Override
      public void validate(ValidatorContext context) {
          ClusterCommandDTO clusterCommand = context.getCommandDTO().getClusterCommand();
          String clusterName = clusterCommand.getName();
  
          ClusterPO clusterPO = clusterDao.findByName(clusterName);
  
          if (clusterPO != null) {
              throw new ApiException(ApiExceptionEnum.CLUSTER_EXISTS, clusterName);
          }
  
          List<String> hostnames = clusterCommand.getHosts().stream()
                  .flatMap(hostCommandDTO -> hostCommandDTO.getHostnames().stream())
                  .toList();
          List<HostPO> hostPOList = hostDao.findAllByHostnames(hostnames);
          if (CollectionUtils.isNotEmpty(hostPOList)) {
              List<String> existsHostnames =
                      hostPOList.stream().map(HostPO::getHostname).toList();
              throw new ApiException(ApiExceptionEnum.HOST_ASSIGNED, String.join(",", existsHostnames));
          }
      }
  }
  