<%#
 Copyright 2013-2019 the original author or authors from the JHipster project.

 This file is part of the JHipster project, see https://jhipster.github.io/
 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

      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 <%=packageName%>.config.oauth2;

import <%=packageName%>.security.oauth2.CookieTokenExtractor;
import <%=packageName%>.security.oauth2.OAuth2AuthenticationService;
import <%=packageName%>.security.oauth2.OAuth2CookieHelper;
import <%=packageName%>.security.oauth2.OAuth2TokenEndpointClient;
import <%=packageName%>.web.filter.RefreshTokenFilterConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configurers.ResourceServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.authentication.TokenExtractor;
import org.springframework.security.oauth2.provider.token.TokenStore;

/**
 * Configures the RefreshFilter refreshing expired OAuth2 token Cookies.
 */
@Configuration
@EnableResourceServer
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class OAuth2AuthenticationConfiguration extends ResourceServerConfigurerAdapter {
    private final OAuth2Properties oAuth2Properties;
    private final OAuth2TokenEndpointClient tokenEndpointClient;
    private final TokenStore tokenStore;

    public OAuth2AuthenticationConfiguration(OAuth2Properties oAuth2Properties, OAuth2TokenEndpointClient tokenEndpointClient, TokenStore tokenStore) {
        this.oAuth2Properties = oAuth2Properties;
        this.tokenEndpointClient = tokenEndpointClient;
        this.tokenStore = tokenStore;
    }

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .antMatchers("/auth/login").permitAll()
            .antMatchers("/auth/logout").authenticated()
            .and()
            .apply(refreshTokenSecurityConfigurerAdapter());
    }

    /**
     * A {@code SecurityConfigurerAdapter} to install a servlet filter that refreshes OAuth2 tokens.
     */
    private RefreshTokenFilterConfigurer refreshTokenSecurityConfigurerAdapter() {
        return new RefreshTokenFilterConfigurer(uaaAuthenticationService(), tokenStore);
    }

    @Bean
    public OAuth2CookieHelper cookieHelper() {
        return new OAuth2CookieHelper(oAuth2Properties);
    }

    @Bean
    public OAuth2AuthenticationService uaaAuthenticationService() {
        return new OAuth2AuthenticationService(tokenEndpointClient, cookieHelper());
    }

    /**
     * Configure the ResourceServer security by installing a new {@link TokenExtractor}.
     */
    @Override
    public void configure(ResourceServerSecurityConfigurer resources) throws Exception {
        resources.tokenExtractor(tokenExtractor());
    }

    /**
     * The new {@link TokenExtractor} can extract tokens from Cookies and Authorization headers.
     *
     * @return the {@link CookieTokenExtractor} bean.
     */
    @Bean
    public TokenExtractor tokenExtractor() {
        return new CookieTokenExtractor();
    }

}