This is a module that might benefit from Sub::Exporter. It allows you to export custom functions that are tailored to the user's needs. Here are some usage examples:
use Business::CreditCard::Obscure qw(obscure);
print obscure('4444333322221111'); # 4444********1111
use Business::CreditCard::Obscure
obscure => { head => 4, tail => -4, replacement => '!' };
print obscure('4444333322221111'); # 4444!!!!!!!!1111
use Business::CreditCard::Obscure
obscure => { head => 4, -as => 'obscurevisa' },
obscure => { head => 3, tail => -3, -as => 'obscurediner' };
print obscurevisa('4444333322221111'); # 4444********1111
print obscurediner('444333222111'); # 444******111
And here is the code to implement the above examples:
package Business::CreditCard::Obscure;
use strict;
use warnings;
use Sub::Exporter
-setup => {
exports => [ obscure => \&build_obscure ]
};
sub build_obscure {
my ( $class, $name, $arg ) = @_;
$arg->{head} ||= 0;
$arg->{tail} ||= -4;
$arg->{replacement} ||= '*';
return sub {
my $data = shift;
substr( $data, $arg->{head}, $arg->{tail} )
=~ s/./$arg->{replacement}/g;
return $data;
}
}
1;
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