Transducer.hs

{-# LANGUAGE BlockArguments #-}
{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE QualifiedDo #-}
-- @generated by keiro-dsl 0.12.0.0 (language keiro-dsl 5) from aggregate Orders; do not edit.
module Generated.CatalogDemo.Orders.Transducer
  ( ordersTransducer
  , ordersFoldFingerprint
  , BehaviorOwnership (..)
  , ordersPredicateVerifications
  ) where

import Generated.CatalogDemo.Orders.Domain
import Data.Text (Text)
import Keiki.Builder qualified as B
import Keiki.Core (HsPred, SymTransducer)
import Keiki.Core qualified as K
import Keiki.Symbolic qualified as S
import Keiki.Builder ((=:))

ordersTransducer
  :: SymTransducer
       (HsPred OrdersRegs OrdersCommand)
       OrdersRegs
       OrdersVertex
       OrdersCommand
       OrdersEvent
ordersTransducer =
  B.buildTransducer OrdersEmpty initialOrdersRegs isTerminal do
    B.from OrdersEmpty do
      B.onCmd inCtorRecordOrder $ \d -> B.do
        B.slot @"total" =: d.amount
        B.emit wireOrderRecorded (OrderRecordedTermFields
          { amount = d.amount
          , orderPayload = d.orderPayload
          , sharedReference = d.sharedReference
          })
        B.goto OrdersRecorded
 where
  isTerminal = \case
    OrdersRecorded -> True
    _ -> False

ordersFoldFingerprint :: Text
ordersFoldFingerprint = "30ef09fd66e5b739d6b8855b3c20aec8"

data BehaviorOwnership = GeneratedOwned | HoleOwned
  deriving stock (Eq, Show)

-- Every checked transition predicate is audited through Keiki's conservative
-- symbolic verifier. Opaque Hole terms remain explicitly unverified.
ordersPredicateVerifications :: IO [(Text, BehaviorOwnership, S.PredicateVerification)]
ordersPredicateVerifications = sequence
  [ verifyTransition "transition1EmptyRecordOrder" GeneratedOwned OrdersEmpty 0
  ]
 where
  verifyTransition label owner source edgeIndex =
    case drop edgeIndex (K.edgesOut ordersTransducer source) of
      K.Edge predicate _ _ _ _ : _ -> (\result -> (label, owner, result)) <$> S.verifyPredicate predicate
      [] -> pure (label, owner, S.UnverifiedSolverFailure "generated transition edge missing")