/*
 * Copyright (c) 2008, Christophe Delory
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY CHRISTOPHE DELORY ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CHRISTOPHE DELORY BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.messic.server.playlists.m3u;

import java.io.BufferedWriter;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;

import org.messic.server.playlists.Media;
import org.messic.server.playlists.Playlist;
import org.messic.server.playlists.SpecificPlaylist;
import org.messic.server.playlists.SpecificPlaylistProvider;
import org.messic.server.playlists.content.Content;

/**
 * A M3U, M4U, or Real Audio Metadata playlist.
 *
 * @version $Revision: 92 $
 * @author Christophe Delory
 */
public class M3U
    implements SpecificPlaylist
{
    /**
     * The provider of this specific playlist.
     */
    private transient SpecificPlaylistProvider _provider = null;

    /**
     * The list of child resources.
     */
    private final List<Resource> _resources = new ArrayList<Resource>();

    /**
     * <code>true</code> if the marshalled playlist must be an Extension M3U, <code>false</code> otherwise.
     */
    private boolean _extensionM3U = false;

    @Override
    public void setProvider( final SpecificPlaylistProvider provider )
    {
        _provider = provider;
    }

    @Override
    public SpecificPlaylistProvider getProvider()
    {
        return _provider;
    }

    @Override
    public void writeTo( final OutputStream out, final String encoding )
        throws Exception
    {
        String enc = encoding;

        if ( enc == null )
        {
            enc = "UTF-8"; // For the M3U8 case. FIXME US-ASCII?
        }

        final BufferedWriter writer = new BufferedWriter( new OutputStreamWriter( out, enc ) ); // Throws
                                                                                                // NullPointerException
                                                                                                // if out is null. May
                                                                                                // throw
                                                                                                // UnsupportedEncodingException.

        if ( _extensionM3U )
        {
            writer.write( "#EXTM3U" ); // May throw IOException.
            writer.newLine(); // May throw IOException.
        }

        for ( Resource resource : _resources )
        {
            if ( _extensionM3U )
            {
                writer.write( "#EXTINF:" ); // May throw IOException.
                writer.write( Long.toString( resource.getLength() ) ); // May throw IOException.
                writer.write( "," ); // May throw IOException.

                if ( resource.getName() == nu