package Catmandu::Fix::vacuum;
use Catmandu::Sane;
our $VERSION = '0.9504';
use Moo;
use CGI::Expand ();
use Catmandu::Fix::Bind::visitor;
use namespace::clean;
use Catmandu::Fix::Has;
sub fix {
my ($self,$data) = @_;
my $ref = eval {
# This can die with 'Unknown reference type' when the data is blessed
CGI::Expand->collapse_hash($data);
};
# Try to unbless data
if ($@) {
my $bind = Catmandu::Fix::Bind::visitor->new;
my $data = $bind->unit($data);
$data = $bind->bind($data,sub {
my $item = $_[0];
$item->{scalar} = sprintf "%s" , $item->{scalar} if (ref $item->{scalar});
$item;
});
$ref = CGI::Expand->collapse_hash($data);
}
for my $key (keys %$ref) {
my $value = $ref->{$key};
delete $ref->{$key} unless defined($value) && length $value && $value =~ /\S/;
}
CGI::Expand->expand_hash($ref);
}
1;
__END__
=pod
=head1 NAME
Catmandu::Fix::vacuum - delete all empty fields from your data
=head1 SYNOPSIS
# Delete all the empty fields
#
# input:
#
# foo: ''
# bar: []
# relations: {}
# test: 123
#
vacuum()
# output:
#
# test: 123
#
=head1 SEE ALSO
L<Catmandu::Fix>
=cut