EventStream.hs

-- @generated by keiro-dsl 0.21.0.0 (language keiro-dsl 6) from aggregate Lifecycle; do not edit.
module Generated.MappedRegisterConstruction.Lifecycle.EventStream
  ( lifecycleCategory
  , lifecycleCommandCategory
  , lifecycleEventStream
  , lifecycleEventStreamDef
  , LifecycleEventStream
  , LifecycleEventStreamDef
  , lifecycleSnapshotFixture
  ) where

import Generated.MappedRegisterConstruction.Lifecycle.Domain
import Generated.MappedRegisterConstruction.Lifecycle.Codec (lifecycleCodec)
import Generated.MappedRegisterConstruction.Lifecycle.Transducer (lifecycleFoldFingerprint, lifecycleTransducer)
import Keiki.Core (HsPred)
import Keiro.EventStream (EventStream (..), SnapshotPolicy (..))
import Keiro.EventStream.Validate (ValidatedEventStream, mkEventStreamOrThrow)
import Data.Text (Text)
import Keiro.Snapshot.Codec (defaultStateCodec, withFoldFingerprint)
import Keiro.Stream qualified as Stream

-- The validated aggregate stream category (hole-kind 5: referenced, never retyped).
-- Entity streams are '<category>-<id>' via Keiro.Stream.entityStream.
-- categoryUnsafe is safe here because this generated literal passed the DSL category proof.
lifecycleCategory :: Stream.StreamCategory LifecycleEventStreamDef
lifecycleCategory = Stream.categoryUnsafe "lifecycle"

-- The same category text, typed for command envelopes such as PMCommand.
lifecycleCommandCategory :: Stream.StreamCategory LifecycleCommand
lifecycleCommandCategory = Stream.categoryUnsafe "lifecycle"

type LifecycleEventStreamDef =
  EventStream (HsPred LifecycleRegs LifecycleCommand) LifecycleRegs LifecycleVertex LifecycleCommand LifecycleEvent

type LifecycleEventStream =
  ValidatedEventStream (HsPred LifecycleRegs LifecycleCommand) LifecycleRegs LifecycleVertex LifecycleCommand LifecycleEvent

lifecycleEventStreamDef :: LifecycleEventStreamDef
lifecycleEventStreamDef =
  EventStream
    { transducer = lifecycleTransducer,
      initialState = LifecycleEmpty,
      initialRegisters = initialLifecycleRegs,
      eventCodec = lifecycleCodec,
      resolveStreamName = Stream.streamName,
      snapshotPolicy = Every 1,
      -- The snapshot discriminator composes: the spec's state-codec version (bump it
      -- in the spec's `state-codec version=` clause), keiki's register and
      -- control-state shape hashes, and this fold fingerprint derived from the
      -- spec's transition surface (guards, writes, emits, states, register
      -- initials, referenced rules). Spec-visible fold changes invalidate old
      -- snapshots automatically. Version-2 Hole-owned transitions additionally
      -- compose their explicit hand-owned FoldVersion tokens here; bump the
      -- corresponding token whenever that Hole behavior changes.
      stateCodec = Just (withFoldFingerprint lifecycleFoldFingerprint (defaultStateCodec 1))
    }

lifecycleSnapshotFixture :: (Int, Text)
lifecycleSnapshotFixture = (1, "mapped-register-construction-v1")

lifecycleEventStream :: LifecycleEventStream
lifecycleEventStream =
  mkEventStreamOrThrow "Lifecycle" lifecycleEventStreamDef