EventStream.hs

-- @generated by keiro-dsl; do not edit. Regenerated from the .keiro spec.
module Generated.AggregateScalars.ScalarLedger.EventStream
  ( scalarLedgerCategory
  , scalarLedgerEventStream
  , scalarLedgerEventStreamDef
  , ScalarLedgerEventStream
  , ScalarLedgerEventStreamDef
  , scalarLedgerSnapshotFixture
  ) where

import Generated.AggregateScalars.ScalarLedger.Domain
import Generated.AggregateScalars.ScalarLedger.Codec (scalarLedgerCodec)
import AggregateScalars.ScalarLedger.Holes (scalarLedgerTransducer)
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.
scalarLedgerCategory :: Stream.StreamCategory a
scalarLedgerCategory = Stream.categoryUnsafe "scalarLedger"

type ScalarLedgerEventStreamDef =
  EventStream (HsPred ScalarLedgerRegs ScalarLedgerCommand) ScalarLedgerRegs ScalarLedgerVertex ScalarLedgerCommand ScalarLedgerEvent

type ScalarLedgerEventStream =
  ValidatedEventStream (HsPred ScalarLedgerRegs ScalarLedgerCommand) ScalarLedgerRegs ScalarLedgerVertex ScalarLedgerCommand ScalarLedgerEvent

scalarLedgerEventStreamDef :: ScalarLedgerEventStreamDef
scalarLedgerEventStreamDef =
  EventStream
    { transducer = scalarLedgerTransducer
    , initialState = ScalarLedgerEmpty
    , initialRegisters = initialScalarLedgerRegs
    , eventCodec = scalarLedgerCodec
    , 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. Fold changes made ONLY in the hand-owned Holes
    -- module are invisible here: bump `state-codec version=` manually or old
    -- snapshots will be served stale.
    , stateCodec = Just (withFoldFingerprint "f1fd9ca5a924e6b9" (defaultStateCodec 1))
    }

scalarLedgerSnapshotFixture :: (Int, Text)
scalarLedgerSnapshotFixture = (1, "aggregate-scalars-v1")

scalarLedgerEventStream :: ScalarLedgerEventStream
scalarLedgerEventStream =
  mkEventStreamOrThrow "ScalarLedger" scalarLedgerEventStreamDef