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.camel.component.hashicorp.vault;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.camel.Endpoint;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.support.DefaultProducer;
  import org.apache.camel.util.ObjectHelper;
  import org.springframework.vault.core.VaultKeyValueOperations;
  import org.springframework.vault.core.VaultKeyValueOperationsSupport;
  import org.springframework.vault.support.VaultResponse;
  
  public class HashicorpVaultProducer extends DefaultProducer {
      public HashicorpVaultProducer(final Endpoint endpoint) {
          super(endpoint);
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          HashicorpVaultOperation operation = determineOperation(exchange);
          switch (operation) {
              case createSecret:
                  createSecret(exchange);
                  break;
              case getSecret:
                  getSecret(exchange);
                  break;
              case deleteSecret:
                  deleteSecret(exchange);
                  break;
              case listSecrets:
                  listSecrets(exchange);
                  break;
              default:
                  throw new IllegalArgumentException("Unsupported operation");
          }
      }
  
      private void createSecret(Exchange exchange) {
          String secretPath = getSecretPath(exchange);
          VaultKeyValueOperations keyValue
                  = getEndpoint().getVaultTemplate().opsForKeyValue(getEndpoint().getConfiguration().getSecretsEngine(),
                          VaultKeyValueOperationsSupport.KeyValueBackend.versioned());
          keyValue.put(secretPath, exchange.getMessage().getBody());
      }
  
      private void getSecret(Exchange exchange) {
          String secretPath = getSecretPath(exchange);
          String secretVersion = null;
          if (ObjectHelper.isNotEmpty(exchange.getMessage().getHeader(HashicorpVaultConstants.SECRET_VERSION))) {
              secretVersion = exchange.getMessage().getHeader(HashicorpVaultConstants.SECRET_VERSION, String.class);
          }
          String completePath = "";
          if (!getEndpoint().getConfiguration().isCloud()) {
              completePath = getEndpoint().getConfiguration().getSecretsEngine() + "/" + "data" + "/" + secretPath;
          } else {
              if (ObjectHelper.isNotEmpty(getEndpoint().getConfiguration().getNamespace())) {
                  completePath = getEndpoint().getConfiguration().getNamespace() + "/"
                                 + getEndpoint().getConfiguration().getSecretsEngine() + "/" + "data" + "/" + secretPath;
              }
          }
          if (ObjectHelper.isNotEmpty(secretVersion)) {
              completePath = completePath + "?version=" + secretVersion;
          }
          VaultResponse rawSecret = getEndpoint().getVaultTemplate().read(completePath);
          if (rawSecret != null) {
              exchange.getMessage().setBody(rawSecret.getData());
          } else {
              exchange.getMessage().setBody(null);
          }
      }
  
      private void deleteSecret(Exchange exchange) {
          String secretPath = getSecretPath(exchange);
          VaultKeyValueOperations keyValue
                  = getEndpoint().getVaultTemplate().opsForKeyValue(getEndpoint().getConfiguration().getSecretsEngine(),
                          VaultKeyValueOperationsSupport.KeyValueBackend.versioned());
          keyValue.delete(secretPath);
      }
  
      private void listSecrets(Exchange exchange) {
          List<String> secretsList = new ArrayList<>();
          if (!getEndpoint().getConfiguration().isCloud()) {
              secretsList = getEndpoint().getVaultTemplate()
                      .list(getEndpoint().getConfiguration().getSecretsEngine() + "/" + "metadata" + "/");
          } else {
              if (ObjectHelper.isNotEmpty(getEndpoint().getConfiguration().getNamespace())) {
                  secretsList = getEndpoint().getVaultTemplate()
                          .list(getEndpoint().getConfiguration().getNamespace() + "/"
                                + getEndpoint().getConfiguration().getSecretsEngine() + "/" + "metadata" + "/");
              }
          }
          exchange.getMessage().setBody(secretsList);
      }
  
      @Override
      public HashicorpVaultEndpoint getEndpoint() {
          return (HashicorpVaultEndpoint) super.getEndpoint();
      }
  
      public HashicorpVaultConfiguration getConfiguration() {
          return getEndpoint().getConfiguration();
      }
  
      public static Message getMessageForResponse(final Exchange exchange) {
          return exchange.getMessage();
      }
  
      private HashicorpVaultOperation determineOperation(Exchange exchange) {
          HashicorpVaultOperation operation
                  = exchange.getIn().getHeader(HashicorpVaultConstants.OPERATION, HashicorpVaultOperation.class);
          if (operation == null) {
              operation = getConfiguration().getOperation();
          }
          return operation;
      }
  
      private String getSecretPath(Exchange exchange) {
          String secretPath = exchange.getMessage().getHeader(HashicorpVaultConstants.SECRET_PATH,
                  getEndpoint().getConfiguration().getSecretPath(), String.class);
          if (ObjectHelper.isEmpty(secretPath)) {
              throw new IllegalArgumentException("Secret Path must be specified");
          }
          return secretPath;
      }
  }
  