NAME

Net::UPCDatabase - Simple OO interface to UPCDatabase.com

SYNOPSIS

  use Net::UPCDatabase;
  my $upcdb = Net::UPCDatabase->new;

  print "\n[lookup]\n";
  my $upc = '035000764119';
  my $item = $upcdb->lookup($upc);
  print "UPC: $item->{upc}\n";
  if ($item->{error}) {
    print "Error: $item->{error}\n";
  }
  else {
    print "Product: $item->{description}\n";
    print "Size: $item->{size}\n";
  }

  print "\n[convertUpcE]\n";
  my $upcE = '01212901';
  my $upcA = $upcdb->convertUpcE($upcE);
  print "UPCE: $upcA->{upcE}\n";
  if ($upcA->{error}) {
    print "Error: $upcA->{error}\n";
  }
  else {
    print "UPCA: $upcA->{upc}\n";
  }

  print "\n[calculateCheckDigit]\n";
  my $upcC = '01200000129C';
  my $upcA = $upcdb->calculateCheckDigit($upcE);
  print "UPCC: $upcA->{upcC}\n";
  if ($upcA->{error}) {
    print "Error: $upcA->{error}\n";
  }
  else {
    print "UPCA: $upcA->{upc}\n";
  }

DESCRIPTION

Connects to UPCDatabase.com to get information about a given UPC.

FUNCTIONS

new

  $upcObject = Net::UPCDatabase->new;

  # .. or ..

  $upcObject = Net::UPCDatabase->new( url => $aDifferentUrlThanDefault );

Accepts an OPTIONAL argument, a URL to use instead of the default. Unless you're really sure what you're doing, don't give it a URL. It defaults to 'http://www.upcdatabase.com/rpc', which is probably the right thing.

Returns the object.

lookup

  $itemInfo = $upcObject->lookup($upc);

  # example usage
  my $ean = '0012000000133'; # pepsi 12oz can
  print "EAN: $ean\n";
  my $item = $upcdb->lookup($ean);
  die "LOOKUP-ERROR: $item->{error}\n" if $item->{error};
  print Dumper($item);

Accepts a REQUIRED argument, the UPC to lookup. The UPC can be UPC-E (8 digits), UPC-A (12 digits), or EAN (13 digits).

Returns the data about the given UPC in a hash reference.

On error, it returns the given error reason as $itemInfo->{error}.

convertUpcE

  $ean = $upcObject->convertUpcE($upcE);
  die "ERROR: $ean->{error}\n" if $ean->{error};
  print "EAN: $ean->{ean}\n";

  # example usage
  my $upce = '01201701'; # pepsi 24 pack
  print "UPCE: $upce\n";
  $ean = $upcdb->convertUpcE($upce);
  die "EAN-ERROR: $ean->{error}\n" if $ean->{error};
  print "EAN: $ean->{ean}\n";
  $item = $upcdb->lookup($ean->{ean});
  die "LOOKUP-ERROR: $item->{error}\n" if $item->{error};
  print Dumper($item);

Accepts a REQUIRED argument, the UPC-E to convert.

Returns the EAN (exactly 13 digits).

On error, it returns the given error reason as $itemInfo->{error}.

calculateCheckDigit

  $ean = '001200000C2X1';  # bad (more than one digit being calculated)
  $ean = '001200000C29C';  # bad (more than one digit being calculated)
  $ean = '001200000129C';  # good (only one digit)
  $ean = '00120000012C1';  # good (only one digit)
  $ean = $upcObject->calculateCheckDigit($ean);
  die "ERROR: $ean->{error}\n" if $ean->{error};
  print "EAN: $ean->{ean}\n";

Accepts a REQUIRED argument, the UPC-A or EAN with checkdigit placeholder (C or X) to calculate. This function will calculate the missing digit for any position, not just the last position. This only works if only one digit being calculated. This doesn't work with UPC-E. There is no difference between using "X" or "C" as the placeholder.

Returns the EAN with the checkdigit properly calculated.

On error, it returns the given error reason as $itemInfo->{error}.

NOTE: This uses an internal function, not the function on UPCDatabase.com because it appears that it is currently not implemented on the UPCDatabase.com side of things. If it is implemented to the same extent on UPCDatabase.com, it is a simple change to use it instead.

_calculateCheckDigit

The internal function that calculates the check digit. You won't want to use this yourself.

DEPENDENCIES

Frontier::Client Frontier::RPC2

TODO

UPC checksum checking/creation

Clean up calculation of odd-position checkdigit calculation. It currently uses an inefficient brute-force method of calculation for that position. Even-position and checksum position calculation is pretty efficient. OEOEOEOEOEOX (O=odd, E=even, X=checksum) It's not *really* that wasteful, just not as efficient as it could be.

BUGS

Report bugs on the CPAN bug tracker. Please, do complain if something is broken.

SEE ALSO

http://www.upcdatabase.com/

COPYRIGHT AND LICENSE

Copyright 2005-2009 by Dusty Wilson

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

cpanm Net::UPCDatabase

perl -MCPAN -e shell
install Net::UPCDatabase