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.simple.mutation;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import graphql.schema.DataFetchingEnvironment;
  import graphql.schema.GraphQLObjectType;
  
  import org.apache.causeway.core.metamodel.facets.properties.update.modify.PropertySetterFacet;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  import org.apache.causeway.core.metamodel.spec.feature.MixedIn;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectAction;
  import org.apache.causeway.core.metamodel.spec.feature.OneToOneAssociation;
  import org.apache.causeway.viewer.graphql.model.context.Context;
  import org.apache.causeway.viewer.graphql.model.domain.ElementCustom;
  import org.apache.causeway.viewer.graphql.model.domain.Parent;
  
  public class SimpleTopLevelMutation
                  extends ElementCustom
                  implements Parent {
  
      private final List<SimpleMutationForAction> actions = new ArrayList<>();
      private final List<SimpleMutationForProperty> properties = new ArrayList<>();
  
      public SimpleTopLevelMutation(final Context context) {
          super("Mutation", context);
  
          if (isBuilt()) {
              // type already exists, nothing else to do.
              return;
          }
          var objectSpecifications = context.objectSpecifications();
  
          objectSpecifications
                  .forEach(objectSpec -> {
              objectSpec.streamActions(context.getActionScope(), MixedIn.INCLUDED)
                      .filter(this::inApiScope)
                      .filter(x -> ! x.getSemantics().isSafeInNature())
                      .forEach(objectAction -> addAction(objectSpec, objectAction));
              objectSpec.streamProperties(MixedIn.INCLUDED)
                      .filter(property -> ! property.isAlwaysHidden())
                      .filter(this::inApiScope)
                      .filter(property -> property.containsFacet(PropertySetterFacet.class))
                      .forEach(property -> addProperty(objectSpec, property));
          });
  
          buildObjectType();
      }
  
      /**
       * Never used.
       *
       * @param environment
       * @return
       */
      @Override
      protected Object fetchData(DataFetchingEnvironment environment) {
          return null;
      }
  
      public void addAction(ObjectSpecification objectSpec, final ObjectAction objectAction) {
          var gqlvMutationForAction = new SimpleMutationForAction(objectSpec, objectAction, context);
          addChildFieldFor(gqlvMutationForAction);
          actions.add(gqlvMutationForAction);
      }
  
      public void addProperty(ObjectSpecification objectSpec, final OneToOneAssociation property) {
          var gqlvMutationForProperty = new SimpleMutationForProperty(objectSpec, property, context);
          addChildFieldFor(gqlvMutationForProperty);
          properties.add(gqlvMutationForProperty);
      }
  
      @Override
      public GraphQLObjectType getGqlObjectType() {
          return super.getGqlObjectType();
      }
  
      public void addDataFetchers() {
          addDataFetchersForChildren();
      }
  
      @Override
      protected void addDataFetchersForChildren() {
          actions.forEach(simpleMutationForAction -> simpleMutationForAction.addDataFetcher(this));
          properties.forEach(simpleMutationForProperty -> simpleMutationForProperty.addDataFetcher(this));
      }
  
  }
  