+sub filename {
+ my $tags = shift;
+ mangle_for_file_name(
+ join(' ',
+ @{$tags->{ARTIST}},
+ @{$tags->{ALBUM}},
+ (map { two_digits($_) } @{$tags->{DISCNUMBER} // []}),
+ (map { two_digits($_) } @{$tags->{TRACKNUMBER} // []}),
+ @{$tags->{TITLE}},
+ @{$tags->{VERSION} // []},
+ @{$tags->{PARTNUMBER} // []},
+ )
+ ) . '.mp3';
+}
+