package Catmandu::Fix::Condition::exists;
use Catmandu::Sane;
use Moo;
with 'Catmandu::Fix::Condition';
has path => (is => 'ro', required => 1);
around BUILDARGS => sub {
my ($orig, $class, $path) = @_;
$orig->($class, path => $path);
};
sub emit {
my ($self, $fixer) = @_;
my $path = $fixer->split_path($self->path);
my $key = pop @$path;
my $str_key = $fixer->emit_string($key);
$fixer->emit_walk_path($fixer->var, $path, sub {
my $var = shift;
my $cond = $self->invert ? "unless (" : "if (";
my $perl = "";
if ($key =~ /^\d+$/) {
$cond .= "is_hash_ref(${var}) && exists(${var}->{${str_key}}) || is_array_ref(${var}) && \@{${var}} > ${key}";
} else {
$cond .= "is_hash_ref(${var}) && exists(${var}->{${str_key}})";
}
$cond .= ") {";
$perl .= $cond;
for my $fix (@{$self->fixes}) {
$perl .= $fixer->emit_fix($fix);
}
$perl .= "}";
$perl;
});
}
=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
1;