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/*
 * Copyright 2023 Apple, Inc.
 *
 * 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 com.netflix.spinnaker.gate.security.saml;

import lombok.RequiredArgsConstructor;
import org.springframework.security.saml2.provider.service.authentication.Saml2AuthenticatedPrincipal;

/**
 * Default implementation for extracting the user id from an authenticated SAML user. This uses the
 * settings in {@link SecuritySamlProperties.UserAttributeMapping#getUsername()}
 */
@RequiredArgsConstructor
public class DefaultUserIdentifierExtractor implements UserIdentifierExtractor {
  private final SecuritySamlProperties properties;

  @Override
  public String fromPrincipal(Saml2AuthenticatedPrincipal principal) {
    String userid = principal.getFirstAttribute(properties.getUserAttributeMapping().getUsername());
    return userid != null ? userid : principal.getName();
  }
}