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package HTML::FormFu::Constraint::MinMaxFields;
$HTML::FormFu::Constraint::MinMaxFields::VERSION = '2.01';
use Moose;
use MooseX::Attribute::FormFuChained;
use MooseX::Aliases;
extends 'HTML::FormFu::Constraint';
with 'HTML::FormFu::Role::Constraint::Others';
use HTML::FormFu::Util qw( DEBUG_CONSTRAINTS debug );
has minimum => (
is => 'rw',
alias => 'min',
traits => ['FormFuChained'],
);
has maximum => (
is => 'rw',
alias => 'max',
traits => ['FormFuChained'],
);
after BUILD => sub {
my $self = shift;
$self->attach_errors_to_base(1);
return;
};
sub process {
my ( $self, $params ) = @_;
my $count = 0;
# check when condition
return if !$self->_process_when($params);
# others are needed
my $others = $self->others;
return if !defined $others;
# get field names to check
my @names = ( $self->nested_name );
push @names, ref $others ? @{$others} : $others;
# get min/max values
my $min
= defined $self->minimum
? $self->minimum
: 1;
my $max
= defined $self->maximum
? $self->maximum
: scalar @names;
for my $name (@names) {
my $value = $self->get_nested_hash_value( $params, $name );
DEBUG_CONSTRAINTS && debug( OTHER_NAME => $name );
DEBUG_CONSTRAINTS && debug( VALUE => $value );
if ( ref $value eq 'ARRAY' ) {
my @errors = eval { $self->constrain_values( $value, $params ) };
if ( !@errors && !$@ ) {
$count++;
}
}
else {
my $ok = eval { $self->constrain_value($value) };
if ( $ok && !$@ ) {
$count++;
}
}
}
my $pass = ( $count < $min || $count > $max ) ? 0 : 1;
return $self->mk_errors( {
pass => $pass,
failed => $pass ? [] : \@names,
names => \@names,
} );
}
# return true if value is defined
sub constrain_value {
my ( $self, $value ) = @_;
return 0 if !defined $value || $value eq '';
return 1;
}
__PACKAGE__->meta->make_immutable;
1;
__END__
=head1 NAME
HTML::FormFu::Constraint::MinMaxFields - Min/Max Multi-field Constraint
=head1 SYNOPSIS
type: MinMaxFields
name: foo
others: [bar, baz]
min: 1
max: 1
=head1 DESCRIPTION
Ensure that at least a minimum and only a maximum number of fields are
present.
This constraint doesn't honour the C<not()> value.
=head1 METHODS
=head2 minimum
=head2 min
The minimum number of named fields which must be filled in.
L</min> is an alias for L</minimum>.
=head2 maximum
=head2 max
The maximum number of named fields which must be filled in.
L</max> is an alias for L</maximum>.
The default for max is the number of all affected fields, in other words one
more than the number of elements given to others.
=head2 attach_errors_to_base
Default Value: 1
=head2 attach_errors_to_others
Default Value: 0
=head1 SEE ALSO
Is a sub-class of, and inherits methods from
L<HTML::FormFu::Role::Constraint::Others>, L<HTML::FormFu::Constraint>
L<HTML::FormFu>
=head1 AUTHOR
Mario Minati C<mario.minati@googlemail.com>
=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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