6 use Algorithm::CheckDigits;
9 my ($class, $ustid) = @_;
12 $ustid =~ s{[[:space:].-]+}{}g;
18 my ($class, $ustid) = @_;
20 $ustid = $class->clean($ustid);
22 if ($ustid =~ m{^CHE(\d{3})(\d{3})(\d{3})$}) {
23 return sprintf('CHE-%s.%s.%s', $1, $2, $3);
29 sub _validate_switzerland {
32 return $ustid =~ m{^CHE\d{9}$} ? 1 : 0;
35 sub _validate_european_union {
38 # 1. Two upper-case letters with the ISO 3166-1 Alpha-2 country code (exception: Greece uses EL instead of GR)
39 # 2. Up to twelve alphanumeric characters
41 return 0 unless $ustid =~ m{^(?:AT|BE|BG|CY|CZ|DE|DK|EE|EL|ES|FI|FR|GB|HR|HU|IE|IT|LT|LU|LV|MT|NL|PL|PT|RO|SE|SI|SK|SM)[[:alnum:]]{1,12}$};
43 my $algo_name = "ustid_" . lc(substr($ustid, 0, 2));
44 my $checker = eval { CheckDigits($algo_name) };
46 return $checker->is_valid(substr($ustid, 2)) if $checker;
51 my ($class, $ustid) = @_;
53 $ustid = $class->clean($ustid);
55 return _validate_switzerland($ustid) if $ustid =~ m{^CHE};
56 return _validate_european_union($ustid);
68 SL::VATIDNr - Helper routines for dealing with VAT ID numbers
69 ("Umsatzsteuer-Identifikationsnummern", "UStID-Nr" in German) and
70 Switzerland's enterprise identification numbers (UIDs)
74 my $is_valid = SL::VATIDNr->validate($ustid);
80 =item C<clean> C<$ustid>
82 Returns the number with all spaces, dashes & points removed.
84 =item C<normalize> C<$ustid>
86 Normalizes the given number to the format usually used in the country
87 given by the country code at the start of the number
88 (e.g. C<CHE-123.456.789> for a Swiss UID or DE123456789 for a German
91 =item C<validate> C<$ustid>
93 Returns whether or not a number is valid. Depending on the country
94 code at the start several tests are done including check digit
97 The number in question is first run through the L</clean> function and
98 may therefore contain certain ignored characters.
108 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>