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.causeway.viewer.graphql.model.domain.rich.query;
  
  import java.util.stream.Collectors;
  
  import graphql.schema.DataFetchingEnvironment;
  import graphql.schema.GraphQLList;
  
  import static graphql.schema.GraphQLFieldDefinition.newFieldDefinition;
  
  import org.apache.causeway.core.metamodel.consent.InteractionInitiatedBy;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.viewer.graphql.model.context.Context;
  import org.apache.causeway.viewer.graphql.model.domain.Element;
  import org.apache.causeway.viewer.graphql.model.domain.SchemaType;
  import org.apache.causeway.viewer.graphql.model.domain.common.interactors.PropertyInteractor;
  import org.apache.causeway.viewer.graphql.model.fetcher.BookmarkedPojo;
  import org.apache.causeway.viewer.graphql.model.types.TypeMapper;
  
  public class RichPropertyChoices extends Element {
  
      final PropertyInteractor propertyInteractor;
  
      public RichPropertyChoices(
              final PropertyInteractor propertyInteractor,
              final Context context) {
          super(context);
          this.propertyInteractor = propertyInteractor;
  
          var otoa = propertyInteractor.getObjectMember();
          if (otoa.hasChoices()) {
              var elementType = otoa.getElementType();
              var fieldBuilder = newFieldDefinition()
                      .name("choices")
                      .type(GraphQLList.list(context.typeMapper.outputTypeFor(elementType, SchemaType.RICH)));
              propertyInteractor.addGqlArgument(otoa, fieldBuilder, TypeMapper.InputContext.CHOICES);
              setField(fieldBuilder.build());
          } else {
              setField(null);
          }
      }
  
      @Override
      protected Object fetchData(final DataFetchingEnvironment dataFetchingEnvironment) {
  
          var sourcePojo = BookmarkedPojo.sourceFrom(dataFetchingEnvironment);
  
          var objectSpecification = context.specificationLoader.loadSpecification(sourcePojo.getClass());
          if (objectSpecification == null) {
              return null;
          }
  
          var association = propertyInteractor.getObjectMember();
          var managedObject = ManagedObject.adaptSingular(objectSpecification, sourcePojo);
  
          var choicesManagedObject = association.getChoices(managedObject, InteractionInitiatedBy.USER);
          return choicesManagedObject.stream()
                      .map(ManagedObject::getPojo)
                      .collect(Collectors.toList());
      }
  
  }
  