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package org.apereo.cas.config;

import org.apereo.cas.authentication.principal.PrincipalProvisioner;
import org.apereo.cas.configuration.CasConfigurationProperties;
import org.apereo.cas.configuration.features.CasFeatureModule;
import org.apereo.cas.scim.v2.DefaultScimV2PrincipalAttributeMapper;
import org.apereo.cas.scim.v2.ScimV2PrincipalAttributeMapper;
import org.apereo.cas.scim.v2.ScimV2PrincipalProvisioner;
import org.apereo.cas.util.spring.beans.BeanCondition;
import org.apereo.cas.util.spring.beans.BeanSupplier;
import org.apereo.cas.util.spring.boot.ConditionalOnFeatureEnabled;
import org.apereo.cas.web.flow.CasWebflowConfigurer;
import org.apereo.cas.web.flow.CasWebflowConstants;
import org.apereo.cas.web.flow.CasWebflowExecutionPlanConfigurer;
import org.apereo.cas.web.flow.PrincipalProvisionerAction;
import org.apereo.cas.web.flow.ScimWebflowConfigurer;
import org.apereo.cas.web.flow.actions.ConsumerExecutionAction;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.webflow.definition.registry.FlowDefinitionRegistry;
import org.springframework.webflow.engine.builder.support.FlowBuilderServices;
import org.springframework.webflow.execution.Action;

/**
 * This is {@link CasScimAutoConfiguration}.
 *
 * @author Misagh Moayyed
 * @since 5.1.0
 */
@EnableConfigurationProperties(CasConfigurationProperties.class)
@EnableScheduling
@ConditionalOnFeatureEnabled(feature = CasFeatureModule.FeatureCatalog.SCIM)
@AutoConfiguration
public class CasScimAutoConfiguration {
    private static final BeanCondition CONDITION = BeanCondition.on("cas.scim.enabled").isTrue().evenIfMissing();

    @Configuration(value = "CasScimWebflowConfiguration", proxyBeanMethods = false)
    @EnableConfigurationProperties(CasConfigurationProperties.class)
    static class CasScimWebflowConfiguration {
        @ConditionalOnMissingBean(name = CasWebflowConstants.ACTION_ID_SCIM_PROVISIONING_PRINCIPAL)
        @Bean
        @RefreshScope(proxyMode = ScopedProxyMode.DEFAULT)
        public Action principalScimProvisionerAction(
            final ConfigurableApplicationContext applicationContext,
            @Qualifier(PrincipalProvisioner.BEAN_NAME)
            final PrincipalProvisioner principalProvisioner) {
            return BeanSupplier.of(Action.class)
                .when(CONDITION.given(applicationContext.getEnvironment()))
                .supply(() -> new PrincipalProvisionerAction(principalProvisioner))
                .otherwise(() -> ConsumerExecutionAction.NONE)
                .get();
        }
        @Bean
        @RefreshScope(proxyMode = ScopedProxyMode.DEFAULT)
        @ConditionalOnMissingBean(name = "scimCasWebflowExecutionPlanConfigurer")
        public CasWebflowExecutionPlanConfigurer scimCasWebflowExecutionPlanConfigurer(
            final ConfigurableApplicationContext applicationContext,
            @Qualifier("scimWebflowConfigurer")
            final CasWebflowConfigurer scimWebflowConfigurer) {
            return BeanSupplier.of(CasWebflowExecutionPlanConfigurer.class)
                .when(CONDITION.given(applicationContext.getEnvironment()))
                .supply(() -> plan -> plan.registerWebflowConfigurer(scimWebflowConfigurer))
                .otherwiseProxy()
                .get();
        }
        @ConditionalOnMissingBean(name = "scimWebflowConfigurer")
        @Bean
        @RefreshScope(proxyMode = ScopedProxyMode.DEFAULT)
        public CasWebflowConfigurer scimWebflowConfigurer(
            final CasConfigurationProperties casProperties,
            final ConfigurableApplicationContext applicationContext,
            @Qualifier(CasWebflowConstants.BEAN_NAME_LOGIN_FLOW_DEFINITION_REGISTRY)
            final FlowDefinitionRegistry loginFlowDefinitionRegistry,
            @Qualifier(CasWebflowConstants.BEAN_NAME_FLOW_BUILDER_SERVICES)
            final FlowBuilderServices flowBuilderServices) {
            return BeanSupplier.of(CasWebflowConfigurer.class)
                .when(CONDITION.given(applicationContext.getEnvironment()))
                .supply(() -> new ScimWebflowConfigurer(flowBuilderServices,
                    loginFlowDefinitionRegistry, applicationContext, casProperties))
                .otherwiseProxy()
                .get();
        }
    }
    
    @Configuration(value = "CasScimCoreConfiguration", proxyBeanMethods = false)
    @EnableConfigurationProperties(CasConfigurationProperties.class)
    static class CasScimCoreConfiguration {
        @RefreshScope(proxyMode = ScopedProxyMode.DEFAULT)
        @Bean
        @ConditionalOnMissingBean(name = "scim2PrincipalAttributeMapper")
        public ScimV2PrincipalAttributeMapper scim2PrincipalAttributeMapper() {
            return new DefaultScimV2PrincipalAttributeMapper();
        }
        @RefreshScope(proxyMode = ScopedProxyMode.DEFAULT)
        @Bean
        @ConditionalOnMissingBean(name = PrincipalProvisioner.BEAN_NAME)
        public PrincipalProvisioner principalProvisioner(
            final CasConfigurationProperties casProperties,
            @Qualifier("scim2PrincipalAttributeMapper")
            final ScimV2PrincipalAttributeMapper scim2PrincipalAttributeMapper) {
            return new ScimV2PrincipalProvisioner(casProperties.getScim(), scim2PrincipalAttributeMapper);
        }
    }
}