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package Data::FormValidator::Constraints::CreditCard; |
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############################################################################### |
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# Required inclusions. |
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############################################################################### |
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use strict; |
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use warnings; |
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use Business::CreditCard qw(); |
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############################################################################### |
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# Version number. |
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############################################################################### |
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our $VERSION = '0.03'; |
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############################################################################### |
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# Allow our methods to be exported. |
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############################################################################### |
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use Exporter; |
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use base qw( Exporter ); |
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use vars qw( @EXPORT_OK %EXPORT_TAGS ); |
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@EXPORT_OK = qw( |
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FV_cc_number |
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FV_cc_type |
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FV_cc_expiry |
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FV_cc_expiry_month |
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FV_cc_expiry_year |
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); |
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%EXPORT_TAGS = ( |
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'all' => [@EXPORT_OK], |
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); |
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############################################################################### |
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# Subroutine: FV_cc_number() |
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############################################################################### |
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# Creates a constraint closure that returns true if the constrained value |
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# appears to be a valid credit card number. |
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# |
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# NOTE: "appears to be a valid credit card number" ONLY means that the number |
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# appears to be valid and has passed the checksum test; -NO- tests have been |
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# performed to verify that this is actually a real/valid credit card number. |
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############################################################################### |
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sub FV_cc_number { |
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return sub { |
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my $dfv = shift; |
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my $val = $dfv->get_current_constraint_value(); |
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return Business::CreditCard::validate($val); |
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}; |
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} |
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############################################################################### |
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# Subroutine: FV_cc_type(@set) |
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############################################################################### |
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# Creates a constraint closure that returns true if the constrained value |
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# appears to be a credit card of one of the types listed in the given '@set'. |
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# The '@set' can be provided as either a list of scalars (which are compared |
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# using the 'eq' operator), or as a list of regular expressions. |
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# |
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# For more information on the actual card types that can be checked for, please |
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# refer to the information for the 'cardtype()' method in |
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# 'Business::CreditCard'. |
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############################################################################### |
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sub FV_cc_type { |
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1566
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my (@set) = @_; |
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return sub { |
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my $dfv = shift; |
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my $val = $dfv->get_current_constraint_value(); |
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my $type = Business::CreditCard::cardtype($val); |
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foreach my $elem (@set) { |
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if (ref($elem) eq 'Regexp') { |
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return 1 if ($type =~ $elem); |
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} |
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else { |
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return 1 if ($type eq $elem); |
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} |
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} |
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return; |
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} |
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} |
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############################################################################### |
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# Subroutine: FV_cc_expiry() |
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############################################################################### |
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# Creates a constraint closure that returns true if the constrained value |
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# appears to be a valid credit card expiry date; correct integer values for |
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# year/month, with the date not being in the past. |
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# |
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# Accepted formats include "MM/YY" and "MM/YYYY". |
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# |
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# NOTE: use of this method requires that the full credit card expiry date be |
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# present in a single field; no facilities are provided for gathering the |
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# month/year data from two separate fields. |
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############################################################################### |
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sub FV_cc_expiry { |
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return sub { |
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2704
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my $dfv = shift; |
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my $val = $dfv->get_current_constraint_value(); |
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my ($month, $year) = split('/', $val); |
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return if ((!defined $month) or (!defined $year)); |
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# verify each field individually |
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return if (!_match_cc_expiry_month($month)); |
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return if (!_match_cc_expiry_year($year)); |
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# verify that date is not in the past |
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48
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my @now = localtime(); |
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$year = _windowize_year($year); |
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return if ($year == ($now[5]+1900) and $month <= ($now[4]+1)); |
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# looks good! |
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2
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return "$month/$year"; |
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} |
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1
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1768
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} |
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111
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sub _windowize_year { |
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my $year = shift; |
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if ($year < 1900) { |
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$year += ($year < 70) ? 2000 : 1900; |
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} |
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return $year; |
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} |
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sub _match_cc_expiry_month { |
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my $val = shift; |
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return if ($val =~ /\D/); # only contain numerics |
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return if ($val < 1); # can't be <1 |
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return if ($val > 12); # can't be >12 |
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return $val; |
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} |
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sub _match_cc_expiry_year { |
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my $val = shift; |
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my $now = (localtime)[5] + 1900; |
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return if ($val =~ /\D/); # only contain numerics |
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$val = _windowize_year($val); |
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return if ($val < $now); # can't be before this year |
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return $val; |
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} |
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136
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############################################################################### |
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# Subroutine: FV_cc_expiry_month() |
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############################################################################### |
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# Creates a constraint closure that returns true if the constrained value |
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# appears to be a valid credit card expiry month; an integer in the range of |
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# "1-12". |
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############################################################################### |
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sub FV_cc_expiry_month { |
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return sub { |
145
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2022
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my $dfv = shift; |
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my $val = $dfv->get_current_constraint_value(); |
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return _match_cc_expiry_month($val); |
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} |
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1
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4744
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} |
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151
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############################################################################### |
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# Subroutine: FV_cc_expiry_year() |
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############################################################################### |
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# Creates a constraint closure that returns true if the constrained value |
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# appears to be a valid credit card expiry year; an integer value for a year, |
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# not in the past. |
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# |
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# Expiry years can be provided as either "YY" or "YYYY". When using the |
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# two-digit "YY" format, the year is considered to be part of the sliding |
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# window 1970-2069. |
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############################################################################### |
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sub FV_cc_expiry_year { |
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return sub { |
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6
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6
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1127
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my $dfv = shift; |
165
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17
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my $val = $dfv->get_current_constraint_value(); |
166
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37
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return _match_cc_expiry_year($val); |
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} |
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3693
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} |
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1; |
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=for stopwords MM YY YYYY checksum |
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174
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=head1 NAME |
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176
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Data::FormValidator::Constraints::CreditCard - Data constraints, using Business::CreditCard |
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178
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=head1 SYNOPSIS |
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use Data::FormValidator::Constraints::CreditCard qw(:all); |
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182
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constraint_methods => { |
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cc_number => [ |
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# number is syntactically valid |
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FV_cc_number(), |
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187
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# verify type, by value |
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FV_cc_type(qw(Visa MasterCard)), |
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190
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# verify type, by regex |
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FV_cc_type(qr/visa|mastercard/i), |
192
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], |
193
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194
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# expiry month is within valid range |
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cc_exp_mon => FV_cc_expiry_month(), |
196
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197
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# expiry year is not in the past |
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cc_exp_year => FV_cc_expiry_year(), |
199
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200
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# full expiry date is not in the past |
201
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cc_expiry => FV_cc_expiry(), |
202
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}, |
203
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204
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=head1 DESCRIPTION |
205
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206
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C provides several methods that |
207
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can be used to generate constraint closures for use with C |
208
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for the purpose of validating credit card numbers and expiry dates, using |
209
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C. |
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211
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=head1 METHODS |
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213
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=over |
214
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215
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=item FV_cc_number() |
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Creates a constraint closure that returns true if the constrained value |
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appears to be a valid credit card number. |
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NOTE: "appears to be a valid credit card number" ONLY means that the number |
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appears to be valid and has passed the checksum test; -NO- tests have been |
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performed to verify that this is actually a real/valid credit card number. |
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=item FV_cc_type(@set) |
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Creates a constraint closure that returns true if the constrained value |
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appears to be a credit card of one of the types listed in the given |
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C<@set>. The C<@set> can be provided as either a list of scalars (which are |
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compared using the C operator), or as a list of regular expressions. |
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For more information on the actual card types that can be checked for, |
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please refer to the information for the C method in |
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C. |
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=item FV_cc_expiry() |
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Creates a constraint closure that returns true if the constrained value |
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appears to be a valid credit card expiry date; correct integer values for |
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year/month, with the date not being in the past. |
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Accepted formats include "MM/YY" and "MM/YYYY". |
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NOTE: use of this method requires that the full credit card expiry date be |
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present in a single field; no facilities are provided for gathering the |
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month/year data from two separate fields. |
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=item FV_cc_expiry_month() |
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Creates a constraint closure that returns true if the constrained value |
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appears to be a valid credit card expiry month; an integer in the range of |
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"1-12". |
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=item FV_cc_expiry_year() |
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Creates a constraint closure that returns true if the constrained value |
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appears to be a valid credit card expiry year; an integer value for a year, |
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not in the past. |
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Expiry years can be provided as either "YY" or "YYYY". When using the |
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two-digit "YY" format, the year is considered to be part of the sliding |
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window 1970-2069. |
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=back |
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=head1 AUTHOR |
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Graham TerMarsch (cpan@howlingfrog.com) |
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=head1 COPYRIGHT |
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Copyright (C) 2008, Graham TerMarsch. All Rights Reserved. |
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This is free software; you can redistribute it and/or modify it under the same |
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license as Perl itself. |
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=head1 SEE ALSO |
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278
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L, |
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L. |
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=cut |