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.core.security._testing;
  
  import java.util.Optional;
  import java.util.Stack;
  import java.util.UUID;
  import java.util.concurrent.Callable;
  import java.util.function.Function;
  
  import org.apache.causeway.applib.services.command.Command;
  import org.apache.causeway.applib.services.iactn.Execution;
  import org.apache.causeway.applib.services.iactn.Interaction;
  import org.apache.causeway.applib.services.iactnlayer.InteractionContext;
  import org.apache.causeway.applib.services.iactnlayer.InteractionLayer;
  import org.apache.causeway.applib.services.iactnlayer.InteractionService;
  import org.apache.causeway.applib.services.user.UserMemento;
  import org.apache.causeway.commons.functional.ThrowingRunnable;
  
  import org.jspecify.annotations.NonNull;
  import lombok.RequiredArgsConstructor;
  import lombok.SneakyThrows;
  
  /**
   * A pass-through implementation, free of side-effects,
   * in support of simple JUnit tests.
   */
  public class InteractionService_forTesting
  implements InteractionService {
  
      private Stack<InteractionLayer> interactionLayers = new Stack<>();
  
      @Override
      public InteractionLayer openInteraction() {
          final UserMemento userMemento = UserMemento.system();
          return openInteraction(InteractionContext.ofUserWithSystemDefaults(userMemento));
      }
  
      @Override
      public InteractionLayer openInteraction(final @NonNull InteractionContext interactionContext) {
          final Interaction interaction = new Interaction_forTesting();
          return interactionLayers.push(
                  new InteractionLayer(interaction, interactionContext));
      }
  
      @Override
      public void closeInteractionLayers() {
          interactionLayers.clear();
      }
  
      @Override
      public boolean isInInteraction() {
          return interactionLayers.size()>0;
      }
  
      @Override public Optional<UUID> getInteractionId() {
          return currentInteractionLayer()
                  .map(InteractionLayer::interaction)
                  .map(Interaction::getInteractionId);
      }
  
      @Override public Optional<InteractionLayer> currentInteractionLayer() {
          return interactionLayers.isEmpty()
                  ? Optional.empty()
                  : Optional.of(interactionLayers.peek());
      }
  
      @Override public int getInteractionLayerCount() {
          return interactionLayers.size();
      }
  
      @Override @SneakyThrows
      public <R> R call(final @NonNull InteractionContext interactionContext, final @NonNull Callable<R> callable) {
          try {
              openInteraction(interactionContext);
              return callable.call();
          } finally {
              interactionLayers.pop();
          }
      }
  
      @Override @SneakyThrows
      public void run(final @NonNull InteractionContext interactionContext, final @NonNull ThrowingRunnable runnable) {
          try {
              openInteraction(interactionContext);
              runnable.run();
          } finally {
              interactionLayers.pop();
          }
      }
  
      @Override @SneakyThrows
      public void runAnonymous(final @NonNull ThrowingRunnable runnable) {
          try {
              openInteraction();
              runnable.run();
          } finally {
              interactionLayers.pop();
          }
      }
  
      @Override @SneakyThrows
      public <R> R callAnonymous(final @NonNull Callable<R> callable) {
          try {
              openInteraction();
              return callable.call();
          } finally {
              interactionLayers.pop();
          }
      }
  
      @RequiredArgsConstructor
      static class Interaction_forTesting implements Interaction {
          private final UUID uuid = UUID.randomUUID();
          @Override public <T> T putAttribute(final Class<? super T> type, final T value) { return null; }
          @Override public <T> T computeAttributeIfAbsent(final Class<? super T> type, final Function<Class<?>, ? extends T> mappingFunction) { return null; }
          @Override public <T> T getAttribute(final Class<T> type) { return null; }
          @Override public void removeAttribute(final Class<?> type) { }
          @Override public UUID getInteractionId() { return uuid; }
          @Override public Command getCommand() { return null; }
          @Override public Execution<?, ?> getCurrentExecution() { return null; }
          @Override public Execution<?, ?> getPriorExecution() { return null; }
      };
  
  }
  