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#!/usr/bin/perl -CS

use strict;
use warnings;
use Audio::Scan;
use DateTime::Format::ISO8601::ParseDateTag;
use Error qw(:try);

if ($#ARGV == -1) {
  exit 0
}

my $filename = "$ARGV[ 0 ]";

my $hash = Audio::Scan->scan_tags($filename);
my $tags = $hash->{ "tags" };

sub default {
  if (defined $tags->{ $_[0] }) {
    if ( ref($tags->{ $_[0] }) ne 'ARRAY' ) {
      print "$_[1]: $tags->{ $_[0] }\n";
    } else {
      my $length = length("$_[1]s: ");
      my $array = $tags->{ $_[0] };
      print "$_[1]s: $$array[0]\n";
      shift(@$array);
      foreach my $var (@$array) {
	printf("%*s%s\n",$length,"",$var);
      };
    };
  }; 
};

# ARTIST
default("ARTIST","Artist");


# ALBUM
if (defined $tags->{ "ALBUM" }) {
  print "Album: $tags->{ ALBUM }";

  #DISCNUMBER
  if (defined $tags->{ "DISCNUMBER" }) {
    print ", Disc $tags->{ DISCNUMBER }";
  } 

  # *VOLUME
  if (defined $tags->{ "VOLUME" }) {
    print " [$tags->{ VOLUME }]"
  };
  
  # *EDITION
  if (defined $tags->{ "EDITION" }) {
    print " ($tags->{ EDITION })"
  };

  print "\n";
}

# TRACKNUMBER
default("TRACKNUMBER","Track");

# TITLE
if (defined $tags->{ "TITLE" }) {
  print "Title: $tags->{ TITLE }";

  # OPUS
  if (defined $tags->{ "OPUS" }) {
    if ( $tags->{ OPUS } =~ /^[0-9]*$/ ) {
      print " (Opus $tags->{ OPUS })"
    }
    else {
      print " ($tags->{ OPUS })"
    };
  };
  
  # *AKA
  if (defined $tags->{ "AKA" }) {
    print " \"$tags->{ AKA }\""
  };

  # *KEY
  if (defined $tags->{ "KEY" }) {
    print " in $tags->{ KEY }"
  };

  # PART if only one part
  if ((defined $tags->{ "PART" }) && ( ref($tags->{ "PART" }) ne 'ARRAY' )) {
    print ", $tags->{ PART }"
  }

  # *PARTNUMBER
  elsif (defined $tags->{ "PARTNUMBER" }) {
    print ", Part $tags->{ PARTNUMBER }"
  };

  # VERSION
  if (defined $tags->{ "VERSION" }) {
    print " \[$tags->{ VERSION }\]"
  }


  print "\n";
}; 

# PART if multiple parts
if ((defined $tags->{ "PART" }) && ( ref($tags->{ "PART" }) eq 'ARRAY' )) {
  default("PART","Part");
}

# COMPOSER
default("COMPOSER","Composer");
 
# CONDUCOR
default("CONDUCOR","Conductor");

# PERFORMER 
default("PERFORMER","Performer");

# ENSEMBLE
default("ENSEMBLE","Ensemble");

# ARRANGER 
default("ARRANGER","Arranger");

# LYRICIST 
default("LYRICIST","Lyricist");

# AUTHOR 
default("AUTHOR","Author");

# LABEL
default("LABEL","Label");

# *COLLECTION
default("COLLECTION", "Collection");

# PUBLISHER
default("PUBLISHER","Publisher");

# COPYRIGHT 
default("COPYRIGHT","Copyright");

# EAN/UPN 
default("EAN/UPN","EAN/UPN");

# GENRE
default("GENRE", "Genre");

# PRODUCER
default("PRODUCER", "Producer");

# DATE
if (defined $tags->{ "DATE" }) {
  my $dateparser = DateTime::Format::ISO8601::ParseDateTag->new;
  if ( ref($tags->{ "DATE" }) ne 'ARRAY' ) {
    try { print $dateparser->parse($tags->{ "DATE" }) . "\n"; }
      catch Error with { print "$@" }; 
  }
  else {
    my $array = $tags->{ "DATE" };
    foreach my $var (@$array) {
      try { print $dateparser->parse($var) . "\n"; }
	catch Error with { print "$@" };
    };
  };
}

# LOCATION
default("LOCATION", "Location");

# LICENSE
default("LICENSE", "License");

# SOURCEMEDIA
default("SOURCEMEDIA", "Sourcemedia");

# ENCODING
default("ENCODING", "Encoding");

# ENCODED-BY
default("ENCODED-BY", "Encoded-by");

# CDDB
default("CDDB", "CDDB");

# LABELNO 
default("LABELNO", "LabelNO");

# ISRC
default("ISRC", "ISRC");

# COMMENTS
default("COMMENT", "Comment");