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.common.query.meta;
  
  import java.util.Optional;
  
  import org.apache.causeway.applib.services.bookmark.Bookmark;
  import org.apache.causeway.applib.services.bookmark.BookmarkService;
  import org.apache.causeway.core.config.CausewayConfiguration;
  import org.apache.causeway.core.metamodel.facets.members.cssclass.CssClassFacet;
  import org.apache.causeway.core.metamodel.facets.object.entity.EntityFacet;
  import org.apache.causeway.core.metamodel.facets.object.layout.LayoutPrefixFacet;
  import org.apache.causeway.core.metamodel.object.Bookmarkable;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.objectmanager.ObjectManager;
  
  /**
   * Metadata for every domain object.
   */
  public class CommonMetaFetcher {
  
      private final Bookmark bookmark;
      private final BookmarkService bookmarkService;
      private final ObjectManager objectManager;
      private final CausewayConfiguration causewayConfiguration;
      private final String graphqlPath;
  
      public CommonMetaFetcher(
              final Bookmark bookmark,
              final BookmarkService bookmarkService,
              final ObjectManager objectManager,
              final CausewayConfiguration causewayConfiguration
      ) {
          this.bookmark = bookmark;
          this.bookmarkService = bookmarkService;
          this.objectManager = objectManager;
          this.causewayConfiguration = causewayConfiguration;
          this.graphqlPath = causewayConfiguration.valueOf("spring.graphql.path").orElse("/graphql");
      }
  
      public String logicalTypeName() {
          return bookmark.logicalTypeName();
      }
  
      public String id() {
          return bookmark.identifier();
      }
  
      public String version() {
          return managedObject()
                  .map(managedObject -> {
                      var domainPojo = managedObject.getPojo();
                      var entityFacet = managedObject.objSpec().getFacet(EntityFacet.class);
                      if (entityFacet != null) {
                          var object = entityFacet.versionOf(domainPojo);
                          return object != null ? object.toString() : null;
                      } else {
                          return null;
                      }
                  }).orElse(null);
      }
  
      public Bookmark bookmark() {
          return bookmark;
      }
  
      public String title() {
          return managedObject()
                  .map(ManagedObject::getTitle)
                  .orElse(null);
      }
  
      public String cssClass() {
          return managedObject()
                  .map(managedObject -> {
                      var facet = managedObject.objSpec().getFacet(CssClassFacet.class);
                      return facet != null ? facet.cssClass(managedObject) : null;
                  })
                  .orElse(null);
      }
  
      public String layout() {
          return managedObject()
                  .map(managedObject -> {
                      var facet = managedObject.objSpec().getFacet(LayoutPrefixFacet.class);
                      return facet != null ? facet.layoutPrefix(managedObject) : null;
                  })
                  .orElse(null);
      }
  
      public String grid() {
          return resource("grid");
      }
  
      public String icon() {
          return resource("icon");
      }
  
      private String resource(final String resource) {
          return managedObject()
                  .flatMap(Bookmarkable::getBookmark
                  ).map(bookmark -> String.format(
                          "//%s/object/%s:%s/%s/%s",
                          graphqlPath, bookmark.logicalTypeName(), bookmark.identifier(), causewayConfiguration.getViewer().getGraphql().getMetaData().getFieldName(), resource))
                  .orElse(null);
      }
  
      private Optional<ManagedObject> managedObject() {
          return bookmarkService.lookup(bookmark)
                  .map(objectManager::adapt);
      }
  }
  