#!/usr/bin/env perl

# Usage: bulklame tracks_file

use warnings;
use strict;

sub normalize;

#
# Get the artist name from stdin
#

my $artist = <>;
chomp $artist;

#
# Get the album name from stdin
#

my $album = <>;
chomp $album;

#
# Get the track names from stdin
#

my @titles;

while (<>) {
  # Throw away newlines
  chomp;

  # Ignore blank lines
  next if /^\s*$/;

  push @titles, $_;
}

print "$artist\n";
print "$album\n";

print "-----\n";

for my $title (@titles) {
  print "$title\n";
}

print "-----\n";

#
# For each track, get the corresponding wav file and
# convert to mp3 with the normalized name of the track
# for a file name.
#

# Remove any single quote characters in the album or artist
$album =~ s/'//g;
$artist =~ s/'//g;

my $track_count = 1;

for my $title (@titles) {
  my $wav_name = sprintf 'track%02d.cdda.wav', $track_count;
  
  my $file_name = normalize $title;

  # Remove any single quote characters in the title
  $title =~ s/'//g;

  print "$title\n";

  system("lame --ta '$artist' --tl '$album' --tt '$title' $wav_name $file_name.mp3");

  $track_count++;
}

#
# The normalized name will be all lowercase, using
# underscores instead of spaces, and removing all
# punctuation marks.
#
sub normalize
{
  my $title = shift;

  # Convert to lower case

  $title = lc $title;

  # Turn every group of whitespace characters into a single
  # underscore

  $title =~ s/\s+/_/g;

  # Remove all of the punctuation characters (we'll just
  # define "punctuation" as anything not a letter or a
  # digit)

  $title =~ s/\W//g;

  # And we are done ...

  return $title;
}