package Catmandu::Fix::trim;

use Catmandu::Sane;
use Moo;
use Catmandu::Fix::Has;

has path => (fix_arg => 1);
has mode => (fix_arg => 1, default => sub { 'whitespace' });

with 'Catmandu::Fix::SimpleGetValue';

sub emit_value {
    my ($self, $var) = @_;

    my $perl = "if (is_string(${var})) {";
    if ($self->mode eq 'whitespace') {
        $perl .= "${var} = trim(${var});";
    }
    if ($self->mode eq 'nonword') {
        $perl .= $var.' =~ s/^\W+//;';
        $perl .= $var.' =~ s/\W+$//;';
    }
    $perl .= "}";
    $perl;
}

=head1 NAME

Catmandu::Fix::trim - trim leading and ending junk from the value of a field

=head1 SYNOPSIS

   # the default mode trims whitespace
   # e.g. foo => '   abc   ';
   trim(foo) # foo => 'abc';
   trim(foo, whitespace) # foo => 'abc';
   # trim non-word characters
   # e.g. foo => '   abc  / : .';
   trim(foo, nonword) # foo => 'abc';

=head1 SEE ALSO

L<Catmandu::Fix>

=cut

1;