<%#
 Copyright 2013-2021 the original author or authors from the JHipster project.

 This file is part of the JHipster project, see https://www.jhipster.tech/
 for more information.

 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

      https://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 <%= packageName %>.web.rest;

import org.springframework.http.ResponseEntity;
import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.<% if (reactive) { %>Reactive<% } %>ClientRegistrationRepository;
import org.springframework.security.oauth2.core.oidc.OidcIdToken;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
<%_ if (!reactive) { _%>
import javax.servlet.http.HttpServletRequest;
<%_ } else { _%>
import org.springframework.web.server.WebSession;
import reactor.core.publisher.Mono;
<%_ } _%>
import java.util.HashMap;
import java.util.Map;

/**
 * REST controller for managing global OIDC logout.
 */
@RestController
public class LogoutResource {
    private final <% if (reactive) { %>Mono<<% } %>ClientRegistration<% if (reactive) { %>><% } %> registration;

    public LogoutResource(<% if (reactive) { %>Reactive<% } %>ClientRegistrationRepository registrations) {
        this.registration = registrations.findByRegistrationId("oidc");
    }

    /**
     * {@code POST  /api/logout} : logout the current user.
     *
    <%_ if (!reactive) { _%>
     * @param request the {@link HttpServletRequest}.
    <%_ } _%>
     * @param idToken the ID token.
    <%_ if (reactive) { _%>
     * @param session the current {@link WebSession}.
    <%_ } _%>
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and a body with a global logout URL and ID token.
     */
    @PostMapping("/api/logout")
<%_ if (!reactive) { _%>
    public ResponseEntity<?> logout(HttpServletRequest request,
                                    @AuthenticationPrincipal(expression = "idToken") OidcIdToken idToken) {
        String logoutUrl = this.registration.getProviderDetails()
            .getConfigurationMetadata().get("end_session_endpoint").toString();

        Map<String, String> logoutDetails = new HashMap<>();
        logoutDetails.put("logoutUrl", logoutUrl);
        logoutDetails.put("idToken", idToken.getTokenValue());
        request.getSession().invalidate();
        return ResponseEntity.ok().body(logoutDetails);
    }
<%_ } else { _%>
    public Mono<Map<String, String>> logout(@AuthenticationPrincipal(expression = "idToken") OidcIdToken idToken, WebSession session) {
        return session.invalidate().then(
            this.registration.map(oidc -> oidc.getProviderDetails().getConfigurationMetadata().get("end_session_endpoint").toString())
                .map(logoutUrl -> {
                    Map<String, String> logoutDetails = new HashMap<>();
                    logoutDetails.put("logoutUrl", logoutUrl);
                    logoutDetails.put("idToken", idToken.getTokenValue());
                    return logoutDetails;
                })
        );
    }
<%_ } _%>
}