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package org.apache.james.smtp;

import static org.apache.james.mailets.configuration.Constants.DEFAULT_DOMAIN;
import static org.apache.james.mailets.configuration.Constants.LOCALHOST_IP;
import static org.apache.james.mailets.configuration.Constants.PASSWORD;
import static org.apache.james.mailets.configuration.Constants.awaitAtMostOneMinute;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasSize;

import org.apache.james.MemoryJamesServerMain;
import org.apache.james.mailets.TemporaryJamesServer;
import org.apache.james.mailets.configuration.CommonProcessors;
import org.apache.james.mailets.configuration.MailetConfiguration;
import org.apache.james.mailets.configuration.MailetContainer;
import org.apache.james.mailets.configuration.ProcessorConfiguration;
import org.apache.james.mailets.configuration.SmtpConfiguration;
import org.apache.james.modules.protocols.ImapGuiceProbe;
import org.apache.james.modules.protocols.SmtpGuiceProbe;
import org.apache.james.probe.DataProbe;
import org.apache.james.transport.matchers.SMTPIsAuthNetwork;
import org.apache.james.utils.DataProbeImpl;
import org.apache.james.utils.FakeSmtp;
import org.apache.james.utils.IMAPMessageReader;
import org.apache.james.utils.SMTPMessageSender;
import org.apache.james.utils.SMTPSendingException;
import org.apache.james.utils.SmtpSendingStep;
import org.junit.After;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

public class SmtpAuthorizedAddressesTest {
    private static final String FROM = "fromuser@" + DEFAULT_DOMAIN;
    private static final String TO = "to@any.com";

    @ClassRule
    public static FakeSmtp fakeSmtp = FakeSmtp.withDefaultPort();
    @Rule
    public IMAPMessageReader imapMessageReader = new IMAPMessageReader();
    @Rule
    public SMTPMessageSender messageSender = new SMTPMessageSender(DEFAULT_DOMAIN);
    @Rule
    public TemporaryFolder temporaryFolder = new TemporaryFolder();

    private TemporaryJamesServer jamesServer;

    private void createJamesServer(SmtpConfiguration.Builder smtpConfiguration) throws Exception {
        MailetContainer.Builder mailetContainer = TemporaryJamesServer.SIMPLE_MAILET_CONTAINER_CONFIGURATION
            .putProcessor(ProcessorConfiguration.transport()
                .addMailetsFrom(CommonProcessors.deliverOnlyTransport())
                .addMailet(MailetConfiguration.remoteDeliveryBuilder()
                    .matcher(SMTPIsAuthNetwork.class)
                    .addProperty("gateway", fakeSmtp.getContainer().getContainerIp()))
                .addMailet(MailetConfiguration.TO_BOUNCE));

        jamesServer = TemporaryJamesServer.builder()
            .withBase(MemoryJamesServerMain.SMTP_AND_IMAP_MODULE)
            .withSmtpConfiguration(smtpConfiguration)
            .withMailetContainer(mailetContainer)
            .build(temporaryFolder.newFolder());

        DataProbe dataProbe = jamesServer.getProbe(DataProbeImpl.class);
        dataProbe.addDomain(DEFAULT_DOMAIN);
        dataProbe.addUser(FROM, PASSWORD);
    }

    @After
    public void tearDown() {
        fakeSmtp.clean();
        if (jamesServer != null) {
            jamesServer.shutdown();
        }
    }

    @Test
    public void userShouldBeAbleToRelayMessagesWhenInAcceptedNetwork() throws Exception {
        createJamesServer(SmtpConfiguration.builder()
            .requireAuthentication()
            .withAutorizedAddresses("127.0.0.0/8"));

        messageSender.connect(LOCALHOST_IP, jamesServer.getProbe(SmtpGuiceProbe.class).getSmtpPort())
            .sendMessage(FROM, TO);

        awaitAtMostOneMinute
            .untilAsserted(() -> fakeSmtp.assertEmailReceived(response -> response
                .body("", hasSize(1))
                .body("[0].from", equalTo(FROM))
                .body("[0].subject", equalTo("test"))));
    }

    @Test
    public void userShouldNotBeAbleToRelayMessagesWhenOutOfAcceptedNetwork() throws Exception {
        createJamesServer(SmtpConfiguration.builder()
            .requireAuthentication()
            .withAutorizedAddresses("172.0.0.0/8"));

        assertThatThrownBy(() ->
            messageSender.connect(LOCALHOST_IP, jamesServer.getProbe(SmtpGuiceProbe.class).getSmtpPort())
                .sendMessage(FROM, TO))
            .isEqualTo(new SMTPSendingException(SmtpSendingStep.RCPT, "530 5.7.1 Authentication Required\n"));
    }

    @Test
    public void userShouldBeAbleToRelayMessagesWhenOutOfAcceptedNetworkButAuthenticated() throws Exception {
        createJamesServer(SmtpConfiguration.builder()
            .requireAuthentication()
            .withAutorizedAddresses("172.0.0.0/8"));

        messageSender.connect(LOCALHOST_IP, jamesServer.getProbe(SmtpGuiceProbe.class).getSmtpPort())
            .authenticate(FROM, PASSWORD)
            .sendMessage(FROM, TO);

        awaitAtMostOneMinute
            .untilAsserted(() -> fakeSmtp.assertEmailReceived(response -> response
                .body("", hasSize(1))
                .body("[0].from", equalTo(FROM))
                .body("[0].subject", equalTo("test"))));
    }

    @Test
    public void localDeliveryShouldBePossibleFromNonAuthenticatedNonAuthorizedSender() throws Exception {
        createJamesServer(SmtpConfiguration.builder()
            .requireAuthentication()
            .withAutorizedAddresses("172.0.0.0/8"));

        messageSender.connect(LOCALHOST_IP, jamesServer.getProbe(SmtpGuiceProbe.class).getSmtpPort())
            .sendMessage(TO, FROM);

        imapMessageReader.connect(LOCALHOST_IP, jamesServer.getProbe(ImapGuiceProbe.class).getImapPort())
            .login(FROM, PASSWORD)
            .select(IMAPMessageReader.INBOX)
            .awaitMessage(awaitAtMostOneMinute);
    }

}
