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The Adobe Experience Manager SDK
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// 
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// 
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// 
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// 
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// 
package org.eclipse.jetty.util;

import java.io.FilterWriter;
import java.io.IOException;
import java.io.Writer;

/**
 *  Handle a multipart MIME response.
 *
 * @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
 */
@Deprecated(since = "2021-05-27")
public class MultiPartWriter extends FilterWriter {

    private static final String CRLF = IO.CRLF;

    private static final String DASHDASH = "--";

    public static final String MULTIPART_MIXED = MultiPartOutputStream.MULTIPART_MIXED;

    public static final String MULTIPART_X_MIXED_REPLACE = MultiPartOutputStream.MULTIPART_X_MIXED_REPLACE;

    private String boundary;

    private boolean inPart = false;

    public MultiPartWriter(Writer out) throws IOException {
        super(out);
        boundary = "jetty" + System.identityHashCode(this) + Long.toString(System.currentTimeMillis(), 36);
        inPart = false;
    }

    /**
     * End the current part.
     *
     * @throws IOException IOException
     */
    @Override
    public void close() throws IOException {
        try {
            if (inPart)
                out.write(CRLF);
            out.write(DASHDASH);
            out.write(boundary);
            out.write(DASHDASH);
            out.write(CRLF);
            inPart = false;
        } finally {
            super.close();
        }
    }

    public String getBoundary() {
        return boundary;
    }

    /**
     * Start creation of the next Content.
     *
     * @param contentType the content type
     * @throws IOException if unable to write the part
     */
    public void startPart(String contentType) throws IOException {
        if (inPart)
            out.write(CRLF);
        out.write(DASHDASH);
        out.write(boundary);
        out.write(CRLF);
        out.write("Content-Type: ");
        out.write(contentType);
        out.write(CRLF);
        out.write(CRLF);
        inPart = true;
    }

    /**
     * end creation of the next Content.
     *
     * @throws IOException if unable to write the part
     */
    public void endPart() throws IOException {
        if (inPart)
            out.write(CRLF);
        inPart = false;
    }

    /**
     * Start creation of the next Content.
     *
     * @param contentType the content type of the part
     * @param headers the part headers
     * @throws IOException if unable to write the part
     */
    public void startPart(String contentType, String[] headers) throws IOException {
        if (inPart)
            out.write(CRLF);
        out.write(DASHDASH);
        out.write(boundary);
        out.write(CRLF);
        out.write("Content-Type: ");
        out.write(contentType);
        out.write(CRLF);
        for (int i = 0; headers != null && i < headers.length; i++) {
            out.write(headers[i]);
            out.write(CRLF);
        }
        out.write(CRLF);
        inPart = true;
    }
}