TenantRepository.java

/*
 * Copyright 2026 Global Crop Diversity Trust
 * Licensed under the Apache License, Version 2.0
 * See LICENSE file in project root folder or http://www.apache.org/licenses/LICENSE-2.0
 */

package org.gringlobal.oauth2.server;

import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;

//@Component("tenantRepository")
public class TenantRepository implements ClientRegistrationRepository, Iterable<ClientRegistration> {


	private List<ClientRegistration> tenants;
	private Map<String, ClientRegistration> tenantsByRegistrationId;
	private Map<String, ClientRegistration> tenantsByIssuer;

	@Override
	public ClientRegistration findByRegistrationId(String registrationId) {
		return tenantsByRegistrationId.get(registrationId);
	}

	public static TenantRepository of(Collection<ClientRegistration> clientRegistrations) {
		var tr = new TenantRepository();
		tr.tenants = List.copyOf(clientRegistrations);
		tr.tenantsByRegistrationId = tr.tenants.stream().collect(Collectors.toMap(ClientRegistration::getRegistrationId, Function.identity()));
		tr.tenantsByIssuer = tr.tenants.stream().collect(Collectors.toMap(cr -> cr.getProviderDetails().getIssuerUri(), Function.identity()));
		return tr;
	}

	public ClientRegistration findByIssuer(String issuer) {
		return tenantsByIssuer.get(issuer);
	}

	@Override
	public Iterator<ClientRegistration> iterator() {
		return tenants.iterator();
	}

}