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package HTML::FormFu::Constraint::File::MIME;
use Moose;
use MooseX::Attribute::Chained;
extends 'HTML::FormFu::Constraint';
use List::MoreUtils qw( any );
use Scalar::Util qw( blessed );
has regex => ( is => 'rw', traits => ['Chained'] );
has types => ( is => 'rw', traits => ['Chained'] );
sub constrain_value {
my ( $self, $value ) = @_;
return 1 if !defined $value || $value eq '';
return if !blessed($value) || !$value->isa('HTML::FormFu::Upload');
my $input = $value->headers->content_type;
my $types = $self->types;
my $regex = $self->regex;
if ( defined $types ) {
if ( ref $types ne 'ARRAY' ) {
$types = [$types];
}
return 1 if any { $input eq $_ } @$types;
}
if ( defined $regex ) {
return $input =~ /$regex/x;
}
return;
}
__PACKAGE__->meta->make_immutable;
1;
__END__
=head1 NAME
HTML::FormFu::Constraint::File::MIME - MIME Type Constraint
=head1 DESCRIPTION
Constraint an uploaded file's MIME-type (Content-Type).
L</types> is checked before L</regex>.
=head1 METHODS
=head2 types
Arguments: $mime_type
Arguments: \@mime_types
Optional.
Accepts a single MIME-type or an arrayref of MIME-types. Each is checked
against the uploaded file's MIME-type (as given by the browser), and the
constraint passes if any one of the given types matches.
=head2 regex
Arguments: $regex
Optional.
Accepts a string to be interpreted as a regex, and is checked against the
uploaded files's MIME-type (as given by the browser).
The regex uses the C</x> flag, so that whitespace in the given string is
ignored.
=head1 SEE ALSO
Is a sub-class of, and inherits methods from L<HTML::FormFu::Constraint>
L<HTML::FormFu>
=head1 AUTHOR
Carl Franks, C<cfranks@cpan.org>
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
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