package Catmandu::Fix::copy_field;
use Catmandu::Sane;
our $VERSION = '1.07';
use Moo;
use namespace::clean;
use Catmandu::Fix::Has;
with 'Catmandu::Fix::Base';
has old_path => (fix_arg => 1);
has new_path => (fix_arg => 1);
sub emit {
my ($self, $fixer) = @_;
my $old_path = $fixer->split_path($self->old_path);
my $old_key = pop @$old_path;
my $new_path = $fixer->split_path($self->new_path);
my $vals = $fixer->generate_var;
my $current_val = $fixer->generate_var;
my $perl = "";
$perl .= $fixer->emit_declare_vars($vals, '[]');
$perl .= $fixer->emit_declare_vars($current_val);
$perl .= $fixer->emit_walk_path(
$fixer->var,
$old_path,
sub {
my $var = shift;
$fixer->emit_get_key(
$var, $old_key,
sub {
my $var = shift;
"push(\@{${vals}}, ${var});";
}
);
}
);
$perl
.= "while (\@{${vals}}) {"
. "${current_val} = clone(shift(\@{${vals}}));"
. $fixer->emit_create_path(
$fixer->var,
$new_path,
sub {
my $var = shift;
"${var} = ${current_val};";
}
) . "}";
$perl;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Fix::copy_field - copy the value of one field to a new field
=head1 SYNOPSIS
# Copy the values of foo.bar into bar.foo
copy_field(foo.bar, bar.foo)
=head1 SEE ALSO
L<Catmandu::Fix>
=cut