/**
 * @author : Paul Taylor
 * <p/>
 * Version @version:$Id: Lyrics3v2Fields.java 832 2009-11-12 13:25:38Z paultaylor $
 * <p/>
 * Jaudiotagger Copyright (C)2004,2005
 * <p/>
 * This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public  License as published by the Free Software Foundation; either version 2.1 of the License,
 * or (at your option) any later version.
 * <p/>
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * <p/>
 * You should have received a copy of the GNU Lesser General Public License along with this library; if not,
 * you can get a copy from http://www.opensource.org/licenses/lgpl-license.php or write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * <p/>
 * Description:
 */
package org.jaudiotagger.tag.lyrics3;

import org.jaudiotagger.tag.datatype.AbstractStringStringValuePair;

public class Lyrics3v2Fields extends AbstractStringStringValuePair
{

    private static Lyrics3v2Fields lyrics3Fields;

    /**
     * CRLF int set
     */
    private static final byte[] crlfByte = {13, 10};
    /**
     * CRLF int set
     */
    public static final String CRLF = new String(crlfByte);

    public static Lyrics3v2Fields getInstanceOf()
    {
        if (lyrics3Fields == null)
        {
            lyrics3Fields = new Lyrics3v2Fields();
        }
        return lyrics3Fields;
    }

    public static final String FIELD_V2_INDICATIONS = "IND";
    public static final String FIELD_V2_LYRICS_MULTI_LINE_TEXT = "LYR";
    public static final String FIELD_V2_ADDITIONAL_MULTI_LINE_TEXT = "INF";
    public static final String FIELD_V2_AUTHOR = "AUT";
    public static final String FIELD_V2_ALBUM = "EAL";
    public static final String FIELD_V2_ARTIST = "EAR";
    public static final String FIELD_V2_TRACK = "ETT";
    public static final String FIELD_V2_IMAGE = "IMG";


    private Lyrics3v2Fields()
    {
        idToValue.put(FIELD_V2_INDICATIONS, "Indications field");
        idToValue.put(FIELD_V2_LYRICS_MULTI_LINE_TEXT, "Lyrics multi line text");
        idToValue.put(FIELD_V2_ADDITIONAL_MULTI_LINE_TEXT, "Additional information multi line text");
        idToValue.put(FIELD_V2_AUTHOR, "Lyrics/Music Author name");
        idToValue.put(FIELD_V2_ALBUM, "Extended Album name");
        idToValue.put(FIELD_V2_ARTIST, "Extended Artist name");
        idToValue.put(FIELD_V2_TRACK, "Extended Track Title");
        idToValue.put(FIELD_V2_IMAGE, "Link to an image files");
        createMaps();
    }

    /**
     * Returns true if the identifier is a valid Lyrics3v2 frame identifier
     *
     * @param identifier string to test
     * @return true if the identifier is a valid Lyrics3v2 frame identifier
     */
    public static boolean isLyrics3v2FieldIdentifier(String identifier)
    {
        return identifier.length() >= 3 && getInstanceOf().getIdToValueMap().containsKey(identifier.substring(0, 3));
    }
}