Codec.hs

{-# LANGUAGE OverloadedRecordDot #-}
-- @generated by keiro-dsl 0.9.0.0 (language keiro-dsl 3) from aggregate OrderBook; do not edit.
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, withText, (.:), (.=))
import Data.Aeson.Types (Parser, explicitParseField, parseEither)
import Data.List.NonEmpty (NonEmpty (..))
import Data.List.NonEmpty qualified as NonEmpty
import Data.Text (Text)
import qualified Data.Text as T
import Keiro.Codec (Codec (..), EventType (..))





orderBookEventTypes :: NonEmpty EventType
orderBookEventTypes = EventType "OrderRecorded" :| []

orderBookCodec :: Codec OrderBookEvent
orderBookCodec =
  Codec
    { eventTypes = orderBookEventTypes
    , 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 " <> show tag <> "; expected one of: " <> _renderEventTypes orderBookEventTypes)

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

_renderEventTypes :: NonEmpty EventType -> String
_renderEventTypes =
  T.unpack
    . T.intercalate ", "
    . map (\(EventType eventTypeName) -> eventTypeName)
    . NonEmpty.toList