content: /*
   * Copyright 2021-2024 Aklivity Inc.
   *
   * Aklivity 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 io.aklivity.zilla.runtime.binding.kafka.internal.config;
  
  import java.util.Map;
  
  import jakarta.json.Json;
  import jakarta.json.JsonObject;
  import jakarta.json.JsonObjectBuilder;
  import jakarta.json.JsonString;
  import jakarta.json.JsonValue;
  import jakarta.json.bind.adapter.JsonbAdapter;
  
  import io.aklivity.zilla.runtime.binding.kafka.config.KafkaTopicHeaderConfig;
  import io.aklivity.zilla.runtime.binding.kafka.config.KafkaTopicTransformsConfig;
  import io.aklivity.zilla.runtime.binding.kafka.config.KafkaTopicTransformsConfigBuilder;
  
  public final class KafkaTopicTransformsConfigAdapter implements JsonbAdapter<KafkaTopicTransformsConfig, JsonObject>
  {
      private static final String EXTRACT_KEY_NAME = "extract-key";
      private static final String EXTRACT_HEADERS_NAME = "extract-headers";
  
      @Override
      public JsonObject adaptToJson(
          KafkaTopicTransformsConfig transforms)
      {
          JsonObjectBuilder object = Json.createObjectBuilder();
  
          if (transforms.extractKey != null)
          {
              object.add(EXTRACT_KEY_NAME, transforms.extractKey);
          }
  
          if (transforms.extractHeaders != null && !transforms.extractHeaders.isEmpty())
          {
              JsonObjectBuilder headers = Json.createObjectBuilder();
              for (KafkaTopicHeaderConfig header : transforms.extractHeaders)
              {
                  headers.add(header.name, header.path);
              }
              object.add(EXTRACT_HEADERS_NAME, headers);
          }
  
          return object.build();
      }
  
      @Override
      public KafkaTopicTransformsConfig adaptFromJson(
          JsonObject object)
      {
          KafkaTopicTransformsConfigBuilder<KafkaTopicTransformsConfig> topicBuilder = KafkaTopicTransformsConfig.builder();
  
          String extractKey = object.containsKey(EXTRACT_KEY_NAME)
              ? object.getString(EXTRACT_KEY_NAME)
              : null;
          topicBuilder.extractKey(extractKey);
  
          JsonObject headers = object.containsKey(EXTRACT_HEADERS_NAME) ? object.getJsonObject(EXTRACT_HEADERS_NAME) : null;
  
          if (headers != null)
          {
              for (Map.Entry<String, JsonValue> entry : headers.entrySet())
              {
                  JsonString jsonString = (JsonString) entry.getValue();
                  topicBuilder.extractHeader(entry.getKey(), jsonString.getString());
              }
          }
  
          return topicBuilder.build();
      }
  }
  