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CFRANKS / HTML-FormFu-0.01003 / lib / HTML / FormFu / Constraint / MinMaxFields.pm 

            

              
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package HTML::FormFu::Constraint::MinMaxFields;
use strict;
use base 'HTML::FormFu::Constraint::_others';
use Class::C3;
__PACKAGE__->mk_accessors(qw/ minimum maximum /);
*min = \&minimum;
*max = \&maximum;
sub new {
    my $self = shift->next::method(@_);
    $self->attach_errors_to_base(1);
    return $self;
}
sub process {
    my ( $self, $params ) = @_;
    my $count = 0;
    # others are needed
    my $others = $self->others;
    return if !defined $others;
    # get min/max values
    my $min = $self->minimum;
    $min = 1 if !defined $min;
    my $max = $self->maximum;
    $max = 1 if !defined $max;
    # get field names to check
    my @names = ( $self->name );
    push @names, ref $others ? @{$others} : $others;
    for my $name (@names) {
        my $value = $params->{$name};
        if ( ref $value ) {
            eval { my @x = @$value };
            croak $@ if $@;
            my @errors = eval { $self->constrain_values( $value, $params ); };
            $count++ if !@errors && !$@;
        }
        else {
            my $ok = eval { $self->constrain_value($value); };
            $count++ if $ok && !$@;
        }
    }
    return $self->mk_errors( {
            pass => ( $count < $min || $count > $max ) ? 0 : 1,
            failed => \@names,
            names  => \@names,
        } );
}
# return true if value is defined
sub constrain_value {
    my ( $self, $value ) = @_;
    return 0 if !defined $value || $value eq '';
    return 1;
}
1;
__END__
=head1 NAME
HTML::FormFu::Constraint::MinMaxFields
=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>.
=head2 attach_errors_to_base
Default Value: 1
=head2 attach_errors_to_others
Default Value: 1
=head1 SEE ALSO
Is a sub-class of, and inherits methods from  
L<HTML::FormFu::Constraint::_others>, L<HTML::FormFu::Constraint>
L<HTML::FormFu::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.