content: /*
   * Copyright 2017-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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.activiti.cloud.services.notifications.graphql.subscriptions.datafetcher;
  
  import graphql.schema.DataFetchingEnvironment;
  import java.util.List;
  import java.util.function.Predicate;
  import java.util.logging.Level;
  import org.activiti.cloud.services.notifications.graphql.events.model.EngineEvent;
  import org.springframework.messaging.Message;
  import reactor.core.publisher.Flux;
  import reactor.util.Logger;
  import reactor.util.Loggers;
  
  public class EngineEventsFluxPublisherFactory implements EngineEventsPublisherFactory {
  
      private static Logger logger = Loggers.getLogger(EngineEventsFluxPublisherFactory.class);
  
      private final Flux<Message<List<EngineEvent>>> engineEventsFlux;
      private final EngineEventsPredicateFactory predicateFactory;
  
      public EngineEventsFluxPublisherFactory(
          Flux<Message<List<EngineEvent>>> engineEventsFlux,
          EngineEventsPredicateFactory predicateFactory
      ) {
          this.engineEventsFlux = engineEventsFlux;
          this.predicateFactory = predicateFactory;
      }
  
      @Override
      public Flux<List<EngineEvent>> getPublisher(DataFetchingEnvironment environment) {
          Predicate<? super EngineEvent> predicate = predicateFactory.getPredicate(environment);
  
          return Flux.from(
              engineEventsFlux
                  .log(logger, Level.CONFIG, true)
                  .flatMapSequential(message ->
                      Flux
                          .fromIterable(message.getPayload())
                          .filter(predicate)
                          .collectList()
                          .filter(list -> !list.isEmpty())
                  )
          );
      }
  }
  