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.security.simple.authorization;
  
  import java.util.List;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  
  import org.springframework.beans.factory.annotation.Qualifier;
  import org.springframework.stereotype.Service;
  
  import org.apache.causeway.applib.Identifier;
  import org.apache.causeway.applib.annotation.PriorityPrecedence;
  import org.apache.causeway.applib.services.iactnlayer.InteractionContext;
  import org.apache.causeway.applib.services.user.UserMemento;
  import org.apache.causeway.core.security.authorization.Authorizor;
  import org.apache.causeway.security.simple.CausewayModuleSecuritySimple;
  import org.apache.causeway.security.simple.realm.SimpleRealm;
  import org.apache.causeway.security.simple.realm.SimpleRealm.Grant;
  
  import lombok.RequiredArgsConstructor;
  
  /**
   * Simple in-memory {@link Authorizor} implementation.
   *
   * @since 2.x {@index}
   */
  @Service
  @Named(CausewayModuleSecuritySimple.NAMESPACE + ".SimpleAuthorizor")
  @jakarta.annotation.Priority(PriorityPrecedence.LATE - 10) // ensure earlier than bypass
  @Qualifier("Simple")
  @RequiredArgsConstructor(onConstructor_ = {@Inject})
  public class SimpleAuthorizor implements Authorizor {
  
      protected final SimpleRealm realm;
  
      @Override
      public boolean isVisible(final InteractionContext ctx, final Identifier identifier) {
          return roles(ctx.getUser()).stream()
              .anyMatch(role->Grant.valueOf(role.grants().apply(identifier)).grantsRead());
      }
  
      @Override
      public boolean isUsable(final InteractionContext ctx, final Identifier identifier) {
          return roles(ctx.getUser()).stream()
              .anyMatch(role->Grant.valueOf(role.grants().apply(identifier)).grantsChange());
      }
  
      protected List<SimpleRealm.Role> roles(final UserMemento userMemento){
          var roles = realm.lookupUserByName(userMemento.name())
              .map(SimpleRealm.User::roles)
              .orElseGet(List::of);
          return roles;
      }
  
  }
  