package Catmandu::Fix::assoc;
use Catmandu::Sane;
our $VERSION = '1.0504';
use Moo;
use namespace::clean;
use Catmandu::Fix::Has;
has path => (fix_arg => 1);
has keys_path => (fix_arg => 1);
has vals_path => (fix_arg => 1);
with 'Catmandu::Fix::Base';
sub emit {
my ($self, $fixer) = @_;
my $path = $fixer->split_path($self->path);
my $keys_path = $fixer->split_path($self->keys_path);
my $vals_path = $fixer->split_path($self->vals_path);
my $keys_key = pop @$keys_path;
my $vals_key = pop @$vals_path;
my $keys_var = $fixer->generate_var;
my $vals_var = $fixer->generate_var;
my $perl
= $fixer->emit_declare_vars([$keys_var, $vals_var], ['[]', '[]']);
$perl .= $fixer->emit_walk_path(
$fixer->var,
$keys_path,
sub {
my $var = shift;
$fixer->emit_get_key(
$var,
$keys_key,
sub {
my $var = shift;
"push(\@{${keys_var}}, ${var}) if is_value(${var});";
}
);
}
);
$perl .= "if (\@{${keys_var}}) {" . $fixer->emit_walk_path(
$fixer->var,
$vals_path,
sub {
my $var = shift;
$fixer->emit_get_key(
$var,
$vals_key,
sub {
my $var = shift;
"push(\@{${vals_var}}, ${var});";
}
);
}
)
. $fixer->emit_create_path(
$fixer->var,
$path,
sub {
my $var = shift;
"if (is_hash_ref(${var} //= {})) {"
. "while (\@{${keys_var}} && \@{${vals_var}}) {"
. "${var}\->{shift(\@{${keys_var}})} = shift(\@{${vals_var}});"
. "}" . "}";
}
) . "}";
$perl;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Fix::assoc - associate two values as a hash key and value
=head1 SYNOPSIS
# {pairs => [{key => 'year', val => 2009}, {key => 'subject', val => 'Perl'}]}
assoc(fields, pairs.*.key, pairs.*.val)
# {fields => {subject => 'Perl', year => 2009}, pairs => [...]}
=head1 SEE ALSO
L<Catmandu::Fix>
=cut