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/*
 * Copyright (c) 1997, 2023 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.eclipse.angus.mail.handlers;

import jakarta.activation.ActivationDataFlavor;
import jakarta.activation.DataSource;
import jakarta.mail.Message;
import jakarta.mail.MessageAware;
import jakarta.mail.MessageContext;
import jakarta.mail.MessagingException;
import jakarta.mail.Session;
import jakarta.mail.internet.MimeMessage;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;


/**
 * @author Christopher Cotton
 */


public class message_rfc822 extends handler_base {

    private static ActivationDataFlavor[] ourDataFlavor = {
            new ActivationDataFlavor(Message.class, "message/rfc822", "Message")
    };

    /**
     * Creates a default {@code message_rfc822}.
     */
    public message_rfc822() {
    }

    @Override
    protected ActivationDataFlavor[] getDataFlavors() {
        return ourDataFlavor;
    }

    /**
     * Return the content.
     */
    @Override
    public Object getContent(DataSource ds) throws IOException {
        // create a new MimeMessage
        try {
            Session session;
            if (ds instanceof MessageAware) {
                MessageContext mc = ((MessageAware) ds).getMessageContext();
                session = mc.getSession();
            } else {
                // Hopefully a rare case.  Also hopefully the application
                // has created a default Session that can just be returned
                // here.  If not, the one we create here is better than
                // nothing, but overall not a really good answer.
                session = Session.getDefaultInstance(new Properties(), null);
            }
            return new MimeMessage(session, ds.getInputStream());
        } catch (MessagingException me) {
            IOException ioex =
                    new IOException("Exception creating MimeMessage in " +
                            "message/rfc822 DataContentHandler");
            ioex.initCause(me);
            throw ioex;
        }
    }

    /**
     * Write the object as a byte stream.
     */
    @Override
    public void writeTo(Object obj, String mimeType, OutputStream os)
            throws IOException {
        if (!(obj instanceof Message))
            throw new IOException("\"" + getDataFlavors()[0].getMimeType() +
                    "\" DataContentHandler requires Message object, " +
                    "was given object of type " + obj.getClass().toString() +
                    "; obj.cl " + obj.getClass().getClassLoader() +
                    ", Message.cl " + Message.class.getClassLoader());

        // if the object is a message, we know how to write that out
        Message m = (Message) obj;
        try {
            m.writeTo(os);
        } catch (MessagingException me) {
            IOException ioex = new IOException("Exception writing message");
            ioex.initCause(me);
            throw ioex;
        }
    }
}