package Catmandu::Fix::collapse;

use Catmandu::Sane;
use Moo;
use CGI::Expand ();
use Catmandu::Fix::Has;

has sep => (fix_opt => 1, default => sub { undef });

sub fix {
	my ($self,$data) = @_;
	my $ref = CGI::Expand->collapse_hash($data);

	if (defined(my $char = $self->sep)) {
		my $new_ref = {};
		for my $key (keys %$ref) {
			my $val = $ref->{$key};
			$key =~ s{\.}{$char}g;
			$new_ref->{$key} = $val;
		}
		$ref = $new_ref;
	}

	$ref;
}

=head1 NAME

Catmandu::Fix::collapse - convert nested data into a flat hash using the TT2 dot convention

=head1 SYNOPSIS

   # Collapse the data into a flat hash
   collapse()

   # Collaps the data into a flat hash with '-' as path seperator
   collapse(-sep => '-')

=head1 SEE ALSO

L<Catmandu::Fix>

=cut

1;