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 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you 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   *
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 * 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    *
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 * under the License.                                           *
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package org.apache.james.modules.protocols;

import java.net.InetSocketAddress;
import java.util.Optional;
import java.util.function.Predicate;

import javax.inject.Inject;

import org.apache.james.imapserver.netty.IMAPServerFactory;
import org.apache.james.protocols.lib.netty.AbstractConfigurableAsyncServer;
import org.apache.james.utils.GuiceProbe;


public class ImapGuiceProbe implements GuiceProbe {

    private final IMAPServerFactory imapServerFactory;

    @Inject
    private ImapGuiceProbe(IMAPServerFactory imapServerFactory) {
        this.imapServerFactory = imapServerFactory;
    }

    public int getImapPort() {
        return getPort(server -> !server.getStartTLSSupported())
                .orElseThrow(() -> new IllegalStateException("IMAP server not defined"));
    }

    public int getImapsPort() {
        return getPort(server -> server.getStartTLSSupported())
                .orElseThrow(() -> new IllegalStateException("IMAPS server not defined"));
    }

    private Optional<Integer> getPort(Predicate<? super AbstractConfigurableAsyncServer> filter) {
        return imapServerFactory.getServers().stream()
                .filter(filter)
                .findFirst()
                .flatMap(server -> server.getListenAddresses().stream().findFirst())
                .map(InetSocketAddress::getPort);
    }
}
