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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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.ambari.server.controller.internal;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import jakarta.inject.Inject;
  
  import org.apache.ambari.server.controller.AmbariManagementController;
  import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
  import org.apache.ambari.server.controller.spi.NoSuchResourceException;
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.spi.Request;
  import org.apache.ambari.server.controller.spi.RequestStatus;
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.ambari.server.controller.spi.ResourceAlreadyExistsException;
  import org.apache.ambari.server.controller.spi.SystemException;
  import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
  import org.apache.ambari.server.controller.utilities.PropertyHelper;
  import org.apache.ambari.server.orm.dao.KerberosDescriptorDAO;
  import org.apache.ambari.server.orm.entities.KerberosDescriptorEntity;
  import org.apache.ambari.server.topology.KerberosDescriptor;
  import org.apache.ambari.server.topology.KerberosDescriptorFactory;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.common.base.Strings;
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.ImmutableSet;
  import com.google.inject.assistedinject.Assisted;
  
  public class KerberosDescriptorResourceProvider extends AbstractControllerResourceProvider {
  
    private static final Logger LOGGER = LoggerFactory.getLogger(KerberosDescriptorResourceProvider.class);
  
    static final String KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID =
        PropertyHelper.getPropertyId("KerberosDescriptors", "kerberos_descriptor_name");
  
    private static final String KERBEROS_DESCRIPTOR_TEXT_PROPERTY_ID =
        PropertyHelper.getPropertyId("KerberosDescriptors", "kerberos_descriptor_text");
  
    /**
     * The key property ids for a KerberosDescriptor resource.
     */
    private static final Map<Resource.Type, String> KEY_PROPERTY_IDS = ImmutableMap.of(Resource.Type.KerberosDescriptor, KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID);
  
    /**
     * The property ids for a KerberosDescriptor resource.
     */
    private static final Set<String> PROPERTY_IDS = ImmutableSet.of(KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID, KERBEROS_DESCRIPTOR_TEXT_PROPERTY_ID);
  
    private KerberosDescriptorDAO kerberosDescriptorDAO;
  
    private KerberosDescriptorFactory kerberosDescriptorFactory;
  
    // keep constructors hidden
    @Inject
    KerberosDescriptorResourceProvider(KerberosDescriptorDAO kerberosDescriptorDAO,
                                       KerberosDescriptorFactory kerberosDescriptorFactory,
                                       @Assisted AmbariManagementController managementController) {
      super(Resource.Type.KerberosDescriptor, PROPERTY_IDS, KEY_PROPERTY_IDS, managementController);
      this.kerberosDescriptorDAO = kerberosDescriptorDAO;
      this.kerberosDescriptorFactory = kerberosDescriptorFactory;
    }
  
    @Override
    public Set<String> checkPropertyIds(Set<String> propertyIds) {
      LOGGER.debug("Skipping property id validation for kerberos descriptor resources");
      return Collections.emptySet();
    }
  
    @Override
    public RequestStatus createResources(Request request) throws ResourceAlreadyExistsException {
      String name = getNameFromRequest(request);
      String descriptor = getRawKerberosDescriptorFromRequest(request);
  
      if (kerberosDescriptorDAO.findByName(name) != null) {
        String msg = String.format("Kerberos descriptor named %s already exists", name);
        LOGGER.info(msg);
        throw new ResourceAlreadyExistsException(msg);
      }
  
      KerberosDescriptor kerberosDescriptor = kerberosDescriptorFactory.createKerberosDescriptor(name, descriptor);
      kerberosDescriptorDAO.create(kerberosDescriptor.toEntity());
  
      return getRequestStatus(null);
    }
  
    @Override
    public Set<Resource> getResources(Request request, Predicate predicate) throws NoSuchResourceException, NoSuchParentResourceException {
  
      List<KerberosDescriptorEntity> results = null;
      boolean applyPredicate = false;
  
      if (predicate != null) {
        Set<Map<String, Object>> requestProps = getPropertyMaps(predicate);
        if (requestProps.size() == 1) {
          String name = (String) requestProps.iterator().next().get(
              KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID);
  
          if (name != null) {
            KerberosDescriptorEntity entity = kerberosDescriptorDAO.findByName(name);
            results = entity == null ? Collections.emptyList() :
                Collections.singletonList(entity);
          }
        }
      }
  
      if (results == null) {
        applyPredicate = true;
        results = kerberosDescriptorDAO.findAll();
      }
  
      Set<Resource> resources = new HashSet<>();
      Set<String> requestPropertyIds = getRequestPropertyIds(request, predicate);
      for (KerberosDescriptorEntity entity : results) {
        Resource resource = new ResourceImpl(Resource.Type.KerberosDescriptor);
        toResource(resource, entity, requestPropertyIds);
  
        if (predicate == null || !applyPredicate || predicate.evaluate(resource)) {
          resources.add(resource);
        }
      }
  
      if (predicate != null && resources.isEmpty()) {
        throw new NoSuchResourceException(
            "The requested resource doesn't exist: Kerberos Descriptor not found, " + predicate);
      }
  
      return resources;
    }
  
    private static void toResource(Resource resource, KerberosDescriptorEntity entity, Set<String> requestPropertyIds) {
      setResourceProperty(resource, KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID, entity.getName(), requestPropertyIds);
      setResourceProperty(resource, KERBEROS_DESCRIPTOR_TEXT_PROPERTY_ID, entity.getKerberosDescriptorText(), requestPropertyIds);
    }
  
    @Override
    public RequestStatus updateResources(Request request, Predicate predicate) throws SystemException,
        UnsupportedPropertyException, NoSuchResourceException, NoSuchParentResourceException {
      throw new UnsupportedOperationException("Not yet implemented!");
    }
  
    @Override
    public RequestStatus deleteResources(Request request, Predicate predicate) throws SystemException,
        UnsupportedPropertyException, NoSuchResourceException, NoSuchParentResourceException {
  
      Set<Resource> setResources = getResources(new RequestImpl(null, null, null, null), predicate);
  
      for (Resource resource : setResources) {
        final String kerberosDescriptorName =
            (String) resource.getPropertyValue(KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID);
        LOGGER.debug("Deleting resource with name: {}", kerberosDescriptorName);
        kerberosDescriptorDAO.removeByName(kerberosDescriptorName);
      }
  
      return getRequestStatus(null);
    }
  
    @Override
    protected Set<String> getPKPropertyIds() {
      return ImmutableSet.copyOf(KEY_PROPERTY_IDS.values());
    }
  
    /**
     * @throws IllegalArgumentException if descriptor text is not found or is empty
     */
    private static String getRawKerberosDescriptorFromRequest(Request request) {
      Map<String, String> requestInfoProperties = request.getRequestInfoProperties();
      if (requestInfoProperties != null) {
        String descriptorText = requestInfoProperties.get(Request.REQUEST_INFO_BODY_PROPERTY);
        if (!Strings.isNullOrEmpty(descriptorText)) {
          return descriptorText;
        }
      }
  
      String msg = "No Kerberos descriptor found in the request body";
      LOGGER.error(msg);
      throw new IllegalArgumentException(msg);
    }
  
    /**
     * @throws IllegalArgumentException if name is not found or is empty
     */
    private static String getNameFromRequest(Request request) {
      if (request.getProperties() != null && !request.getProperties().isEmpty()) {
        Map<String, Object> properties = request.getProperties().iterator().next();
        Object name = properties.get(KERBEROS_DESCRIPTOR_NAME_PROPERTY_ID);
        if (name != null) {
          return String.valueOf(name);
        }
      }
  
      String msg = "No name provided for the Kerberos descriptor";
      LOGGER.error(msg);
      throw new IllegalArgumentException(msg);
    }
  
  }
  