lib/DX/Step/EnterRecheck.pm

   1 package DX::Step::EnterRecheck;
   2
   3 use DX::Step::CompleteRecheck;
   4 use DX::Step::FailRecheck;
   5
   6 use DX::Class;
   7
   8 with 'DX::Role::Step';
   9
  10 has proposition_list => (is => 'ro', required => 1);
  11
  12 has on_completion_step => (is => 'ro', required => 1);
  13
  14 has on_failure_step => (is => 'ro', required => 1);
  15
  16 sub apply_to {
  17   my ($self, $old_ss) = @_;
  18
  19   my ($prop, @rest) = @{$self->proposition_list};
  20
  21   my $old_hyp = $old_ss->current_hypothesis;
  22
  23   # we should probably be doing something about pruning the scope
  24   # but that's completely pointless until we have rules (and also,
  25   # the lock_to_depth arg needs to come from the proposition somehow)
  26
  27   my $ap = DX::ActionPolicy::LockScope->new(
  28     lock_to_depth => $old_hyp->scope->depth,
  29     next_policy => $old_hyp->action_policy,
  30   );
  31
  32   my $hyp = ref($old_hyp)->new(
  33     scope => $old_hyp->scope,
  34     resolved_propositions => DX::ResolvedPropositionSet->new_empty,
  35     actions => [],
  36     action_applications => [],
  37     action_policy => $ap,
  38   );
  39
  40   my $pseq = DX::PropositionSequence->new(
  41     members => [ $prop ],
  42     external_names => {},
  43     internal_names => {},
  44   );
  45
  46   my $next_step = (@rest
  47                     ? $self->but(proposition_list => \@rest)
  48                     : $self->on_completion_step);
  49
  50   trace 'step.recheck.hyp' => $hyp;
  51
  52   my $ss = DX::SearchState->new(
  53     current_hypothesis => $hyp,
  54     alternatives => [],
  55     propositions => $pseq,
  56     next_step => DX::Step::ConsiderProposition->new(
  57                    proposition => $prop,
  58                  ),
  59     is_solution_state => 0,
  60     on_solution_step => DX::Step::CompleteRecheck->new(
  61       resume_search_state => $old_ss->but(next_step => $next_step),
  62       was_recheck_for => $prop,
  63     ),
  64     on_exhaustion_step => DX::Step::FailRecheck->new(
  65       resume_search_state => $old_ss->but(next_step => $self->on_failure_step),
  66     ),
  67   );
  68
  69   return $ss;
  70 }
  71
  72 1;