package Catmandu::Fix::Condition::exists;
use Catmandu::Sane;
our $VERSION = '1.0606';
use Moo;
use namespace::clean;
use Catmandu::Fix::Has;
with 'Catmandu::Fix::Condition';
has path => (fix_arg => 1);
sub emit {
my ($self, $fixer, $label) = @_;
my $path = $fixer->split_path($self->path);
my $key = pop @$path;
my $str_key = $fixer->emit_string($key);
my $perl = $fixer->emit_walk_path(
$fixer->var,
$path,
sub {
my $var = shift;
my $perl = "if (";
if ($key eq '$first' || $key eq '$last') {
$perl .= "is_array_ref(${var}) && \@{${var}}";
}
elsif ($key =~ /^[0-9]+$/) {
$perl
.= "is_hash_ref(${var}) && exists(${var}->{${str_key}}) || is_array_ref(${var}) && \@{${var}} > ${key}";
}
else {
$perl
.= "is_hash_ref(${var}) && exists(${var}->{${str_key}})";
}
$perl .= ") {";
$perl .= $fixer->emit_fixes($self->pass_fixes);
$perl .= "last $label;";
$perl .= "}";
$perl;
}
);
$perl .= $fixer->emit_fixes($self->fail_fixes);
$perl;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Fix::Condition::exists - only execute fixes if the path exists
=head1 SYNOPSIS
# uppercase the value of field 'foo' if the field 'oogly' exists
if exists(oogly)
upcase(foo) # foo => 'BAR'
end
# inverted
unless exists(oogly)
upcase(foo) # foo => 'bar'
end
=head1 SEE ALSO
L<Catmandu::Fix>
=cut