public override string ToString(FormatType format, object supplement = null)
{
bool withoutConstant = SongGenreSplash == null;
string splashAndDxData = $"{SongGenreSplash?.Be($"\n分类：{SongGenreSplash}")}" +
$"{ToSplashRatingString()?.Be("\n难度：{0}", true)}" +
$"{ToSplashConstantString()?.Be("\n定数：{0}", true)}" +
$"{ToRatingString()?.Be("\n旧难度：{0}", true)}" +
$"{ToConstantString()?.Be("\n旧定数：{0}", true)}";
switch (format)
{
case FormatType.Brief:
return($"{SongId}.{SongTitle}({SongType}) {(withoutConstant ? $"*[{ToSplashRatingString()}]" : $"[{ToSplashConstantString()}]")}");
case FormatType.Detail:
return($"{JacketUrl?.Be(new KouImage(JacketUrl, this).ToKouResourceString())}" + //BUG 需要解决翻页可能会使得图片资源字符串裂开的问题
$"{SongId}.{SongTitle} [{SongType}]" +
splashAndDxData +
Version?.Be($"\n版本：{Version}") +
SongArtist?.Be($"\n曲师：{SongArtist}") +
SongBpm?.Be($"\nBPM：{SongBpm}") +
SongLength?.Be($"\n歌曲长度：{SongLength}") +
Remark?.Be($"\n注：{Remark}"));
}
return(null);
}