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.\" ========================================================================
.\"
.IX Title "Business::Tax::VAT::Validation 3pm"
.TH Business::Tax::VAT::Validation 3pm "2012-11-30" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Business::Tax::VAT::Validation \- A class for european VAT numbers validation.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Business::Tax::VAT::Validation;
\&  
\&  my $hvatn=Business::Tax::VAT::Validation\->new();
\&  
\&  # Check number
\&  if ($hvatn\->check($VAT, [$member_state])){
\&        print "OK\en";
\&  } else {
\&        print $hvatn\->get_last_error;
\&  }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This class provides an easy api to check european \s-1VAT\s0 numbers' syntax, and if they has been registered by the competent authorities.
.PP
It asks the \s-1EU\s0 database (\s-1VIES\s0) for this, using its \s-1SOAP\s0 interface methods.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
.IP "\fBnew\fR Class constructor." 4
.IX Item "new Class constructor."
.Vb 1
\&    $hvatn=Business::Tax::VAT::Validation\->new();
\&    
\&    
\&    If your system is located behind a proxy :
\&    
\&    $hvatn=Business::Tax::VAT::Validation\->new(\-proxy => [\*(Aqhttp\*(Aq, \*(Aqhttp://example.com:8001/\*(Aq]);
\&    
\&    Note : See LWP::UserAgent for proxy options.
.Ve
.SH "PROPERTIES"
.IX Header "PROPERTIES"
.IP "\fBmember_states\fR Returns all member states 2\-digit codes as array" 4
.IX Item "member_states Returns all member states 2-digit codes as array"
.Vb 1
\&    @ms=$hvatn\->member_states;
.Ve
.IP "\fBregular_expressions\fR \- Returns a hash list containing one regular expression for each country" 4
.IX Item "regular_expressions - Returns a hash list containing one regular expression for each country"
If you want to test a \s-1VAT\s0 number format ouside this module, e.g. embedded as javascript in a web form.
.Sp
.Vb 1
\&    %re=$hvatn\->regular_expressions;
.Ve
.Sp
returns
.Sp
.Vb 5
\&    (
\&    AT      =>  \*(AqU[0\-9]{8}\*(Aq,
\&    ...
\&    SK        =>  \*(Aq[0\-9]{10}\*(Aq,
\&    );
.Ve
.SH "METHODS"
.IX Header "METHODS"
.IP "\fBcheck\fR \- Checks if a \s-1VAT\s0 number exists in the \s-1VIES\s0 database" 4
.IX Item "check - Checks if a VAT number exists in the VIES database"
.Vb 1
\&    $ok=$hvatn\->check($vatNumber, [$countryCode]);
.Ve
.Sp
You may either provide the \s-1VAT\s0 number under its complete form (e.g. \s-1BE\-123456789\s0, \s-1BE123456789\s0)
or specify the \s-1VAT\s0 and \s-1MSC\s0 (vatNumber and countryCode) individually.
.Sp
Valid \s-1MS\s0 values are :
.Sp
.Vb 3
\& AT, BE, BG, CY, CZ, DE, DK, EE, EL, ES,
\& FI, FR, GB, HU, IE, IT, LU, LT, LV, MT,
\& NL, PL, PT, RO, SE, SI, SK
.Ve
.IP "\fBlocal_check\fR \- Checks if a \s-1VAT\s0 number format is valid This method is based on regexps only and \s-1DOES\s0 \s-1NOT\s0 ask the \s-1VIES\s0 database" 4
.IX Item "local_check - Checks if a VAT number format is valid This method is based on regexps only and DOES NOT ask the VIES database"
.Vb 1
\&    $ok=$hvatn\->local_check($VAT, [$member_state]);
.Ve
.IP "\fBinformations\fR \- Returns informations related to the last validated \s-1VAT\s0 number" 4
.IX Item "informations - Returns informations related to the last validated VAT number"
.Vb 1
\&    %infos=$hvatn\->informations();
.Ve
.IP "\fBget_last_error_code\fR \- Returns the last recorded error code" 4
.IX Item "get_last_error_code - Returns the last recorded error code"
.PD 0
.IP "\fBget_last_error\fR \- Returns the last recorded error" 4
.IX Item "get_last_error - Returns the last recorded error"
.PD
.Vb 2
\&    my $err = $hvatn\->get_last_error_code();
\&    my $txt = $hvatn\->get_last_error();
.Ve
.Sp
Possible errors are :
.RS 4
.IP "\(bu" 4
\&\-1  The provided \s-1VAT\s0 number is valid.
.IP "\(bu" 4
0  Unknown \s-1MS\s0 code : Internal checkup failed (Specified Member State does not exist)
.IP "\(bu" 4
1  Invalid \s-1VAT\s0 number format : Internal checkup failed (bad syntax)
.IP "\(bu" 4
2  This \s-1VAT\s0 number doesn't exist in \s-1EU\s0 database : distant checkup
.IP "\(bu" 4
3  This \s-1VAT\s0 number contains errors : distant checkup
.IP "\(bu" 4
17  Time out connecting to the database : Temporary error when the connection to the database times out
.IP "\(bu" 4
18  Member Sevice Unavailable: The \s-1EU\s0 database is unable to reach the requested member's database.
.IP "\(bu" 4
19  The \s-1EU\s0 database is too busy.
.IP "\(bu" 4
20  Connexion to the \s-1VIES\s0 database failed.
.IP "\(bu" 4
21  The \s-1VIES\s0 interface failed to parse a stream. This error occurs unpredictabely, so you should retry your validation request.
.IP "\(bu" 4
257  Invalid response, please contact the author of this module. : This normally only happens if this software doesn't recognize any valid pattern into the response document: this generally means that the database interface has been modified, and you'll make the author happy by submitting the returned response !!!
.IP "\(bu" 4
500  The \s-1VIES\s0 server encountered an internal server error.
Error 500 : soap:Server \s-1TIMEOUT\s0
Error 500 : soap:Server \s-1MS_UNAVAILABLE\s0
.RE
.RS 4
.Sp
If error_code > 16,  you should temporarily accept the provided number, and periodically perform new checks until response is \s-1OK\s0 or error < 17
If error_code > 256, you should temporarily accept the provided number, contact the author, and perform a new check when the software is updated.
.RE
.SH "SEE ALSO"
.IX Header "SEE ALSO"
LWP::UserAgent
.PP
\&\fIhttp://ec.europa.eu/taxation_customs/vies/faqvies.do\fR for the FAQs related to the \s-1VIES\s0 service.
.SH "FEEDBACK"
.IX Header "FEEDBACK"
If you find this module useful, or have any comments, suggestions or improvements, feel free to let me know.
.SH "AUTHOR"
.IX Header "AUTHOR"
Bernard Nauwelaerts <bpgn@cpan.org>
.SH "CREDITS"
.IX Header "CREDITS"
Many thanks to the following people, actively involved in the development of this software by submitting patches, bug reports, new members regexps, \s-1VIES\s0 interface changes,... (sorted by last intervention) :
.IP "\(bu" 4
Gregor Herrmann, Debian.
.IP "\(bu" 4
Graham Knop.
.IP "\(bu" 4
Bart Heupers, Netherlands.
.IP "\(bu" 4
Martin H. Sluka, noris network \s-1AG\s0, Germany.
.IP "\(bu" 4
Simon Williams, \s-1UK2\s0 Limited, United Kingdom & Benoi\*^t Galy, Greenacres, France & Raluca Boboia, Evozon, Romania
.IP "\(bu" 4
Dave O., POBox, U.S.A.
.IP "\(bu" 4
Kaloyan Iliev, Digital Systems, Bulgaria.
.IP "\(bu" 4
Tom Kirkpatrick, Virus Bulletin, United Kingdom.
.IP "\(bu" 4
Andy Wardley, individual, United Kingdom.
.IP "\(bu" 4
Robert Alloway, Service Centre, United Kingdom.
.IP "\(bu" 4
Torsten Mueller, Archesoft, Germany
.SH "LICENSE"
.IX Header "LICENSE"
\&\s-1GPL\s0. Enjoy! See \s-1COPYING\s0 for further information on the \s-1GPL\s0.
.SH "DISCLAIMER"
.IX Header "DISCLAIMER"
See \fIhttp://ec.europa.eu/taxation_customs/vies/viesdisc.do\fR to known the limitations of the \s-1EU\s0 validation service.
.PP
.Vb 2
\&  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
\&  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
.Ve