1 package DX::Op::ModifyAction;
3 use DX::ObservationRequired;
8 has vars => (is => 'ro', required => 1);
9 has builder => (is => 'ro', required => 1);
11 has _arg_map => (is => 'lazy', builder => sub {
14 +{ map +($name++, $_), @{$self->vars} };
18 my ($self, $state) = @_;
19 ($state, my %args) = $self->_expand_args($state, %{$self->_arg_map});
20 my ($subject, @vars) = @args{sort keys %args};
21 die "Can't alter action on $subject" unless
22 my $orig_action = $state->resolve_value($subject)->required_action;
23 my @deps = $state->action_dependencies(
24 @{$orig_action->dependencies},
29 map $state->resolve_value($_), @vars
31 my $action = $self->builder->(@builder_args)
32 ->but(dependencies => \@deps);
33 my ($fact_type, $value) = $action->expected_effect;
34 my $final_value = $value->but(required_action => $action);
35 my $fact_set = $state->facts->{$fact_type}->with_value($final_value);
36 $state->but(facts => { %{$state->facts}, $fact_type => $fact_set })