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 graphql.schema.DataFetchingEnvironment;
  import graphql.schema.GraphQLOutputType;
  
  import static graphql.schema.GraphQLFieldDefinition.newFieldDefinition;
  
  import org.apache.causeway.applib.annotation.Where;
  import org.apache.causeway.core.metamodel.consent.InteractionInitiatedBy;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectMember;
  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.common.interactors.MemberInteractor;
  import org.apache.causeway.viewer.graphql.model.fetcher.BookmarkedPojo;
  
  import lombok.extern.log4j.Log4j2;
  
  @Log4j2
  public class RichMemberDisabled<T extends ObjectMember> extends Element {
  
      private final MemberInteractor<T> memberInteractor;
  
      public RichMemberDisabled(
              final MemberInteractor<T> memberInteractor,
              final Context context
      ) {
          super(context);
          this.memberInteractor = memberInteractor;
  
          setField(newFieldDefinition()
                  .name("disabled")
                  .type((GraphQLOutputType) context.typeMapper.outputTypeFor(String.class))
                  .build());
      }
  
      @Override
      protected String fetchData(final DataFetchingEnvironment dataFetchingEnvironment) {
  
          var sourcePojo = BookmarkedPojo.sourceFrom(dataFetchingEnvironment);
  
          var sourcePojoClass = sourcePojo.getClass();
          var objectSpecification = context.specificationLoader.loadSpecification(sourcePojoClass);
          if (objectSpecification == null) {
              return String.format("Disabled; could not determine target object's type ('%s')", sourcePojoClass.getName());
          }
  
          var objectMember = memberInteractor.getObjectMember();
          var managedObject = ManagedObject.adaptSingular(objectSpecification, sourcePojo);
  
          var usable = objectMember.isUsable(managedObject, InteractionInitiatedBy.USER, Where.ANYWHERE);
          return usable.getReasonAsString().orElse(null);
      }
  
  }
  