/*
    * 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.maven.search.backend.remoterepository;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.maven.search.api.MAVEN;
  import org.apache.maven.search.api.Record;
  import org.apache.maven.search.api.request.Field;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Helper class that creates record instances for provided backend.
   */
  public final class RecordFactory {
  
      private final RemoteRepositorySearchBackend backend;
  
      public RecordFactory(RemoteRepositorySearchBackend backend) {
          this.backend = requireNonNull(backend);
      }
  
      /**
       * Creates {@link Record} on behalf of backend. Only {@code groupId} is mandatory, all the other values are optional (nullable).
       */
      public Record create(
              String groupId,
              String artifactId,
              String version,
              String classifier,
              String fileExtension,
              Long lastUpdated) {
          requireNonNull(groupId);
          HashMap<Field, Object> result = new HashMap<>();
          mayPut(result, MAVEN.GROUP_ID, groupId);
          mayPut(result, MAVEN.ARTIFACT_ID, artifactId);
          mayPut(result, MAVEN.VERSION, version);
          mayPut(result, MAVEN.CLASSIFIER, classifier);
          mayPut(result, MAVEN.FILE_EXTENSION, fileExtension);
          return new Record(backend.getBackendId(), backend.getRepositoryId(), null, lastUpdated, result);
      }
  
      private static void mayPut(Map<Field, Object> result, Field fieldName, Object value) {
          if (value == null) {
              return;
          }
          if (value instanceof String && ((String) value).isBlank()) {
              return;
          }
          result.put(fieldName, value);
      }
  }