Codec.hs

{-# LANGUAGE OverloadedRecordDot #-}
-- @generated by keiro-dsl; do not edit. Regenerated from the .keiro spec.
module Generated.IdDomainMigration.OrderBook.Codec (
    orderBookCodec,
    parseOrderBookEvent,
    encodeOrderBookEvent,
) where

import Generated.IdDomainMigration.OrderBook.Domain
import Generated.IdDomainMigration.Nominals (OrderId, orderIdText)
import Generated.IdDomainMigration.Nominals.Internal (unsafeOrderIdFromLegacyText)
import Data.Aeson (Value, object, withObject, (.:), (.=))
import Data.Aeson.Types (Parser, parseEither)
import Data.List.NonEmpty (NonEmpty (..))
import Data.Text (Text)
import qualified Data.Text as T
import Keiro.Codec (Codec (..), EventType (..))





orderBookCodec :: Codec OrderBookEvent
orderBookCodec =
  Codec
    { eventTypes = EventType "OrderRecorded" :| []
    , eventType = \case
        OrderRecorded{} -> EventType "OrderRecorded"
    , schemaVersion = 1
    , encode = encodeOrderBookEvent
    , decode = parseOrderBookEvent
    , upcasters = []
    }

encodeOrderBookEvent :: OrderBookEvent -> Value
encodeOrderBookEvent = \case
  OrderRecorded payload ->
    object
      [ "kind" .= ("OrderRecorded" :: Text)
      , "orderId" .= orderIdText payload.orderId
      ]

parseOrderBookEvent :: EventType -> Value -> Either Text OrderBookEvent
parseOrderBookEvent (EventType tag) = mapLeftText . parseEither (withObject "OrderBookEvent" go)
  where
    go o = do
      case tag of
        "OrderRecorded" ->
          OrderRecorded <$> (OrderRecordedData <$> (unsafeOrderIdFromLegacyText <$> o .: "orderId"))
        _ -> fail "unknown event type"

mapLeftText :: Either String b -> Either Text b
mapLeftText = either (Left . T.pack) Right