Codec.hs

{-# LANGUAGE OverloadedRecordDot #-}
-- @generated by keiro-dsl 0.12.0.0 (language keiro-dsl 5) from aggregate Orders; do not edit.
module Generated.CatalogDemo.Orders.Codec (
    ordersCodec,
    parseOrdersEvent,
    encodeOrdersEvent,
) where

import Generated.CatalogDemo.Orders.Domain
import Data.Aeson (Value, object, toJSON, withObject, (.:), (.=))
import Data.Aeson.Types (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 (..))

import CatalogDemo.MappedDomain ()





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

ordersCodec :: Codec OrdersEvent
ordersCodec =
  Codec
    { eventTypes = ordersEventTypes
    , eventType = \case
        OrderRecorded{} -> EventType "OrderRecorded"
    , schemaVersion = 1
    , encode = encodeOrdersEvent
    , decode = parseOrdersEvent
    , upcasters = []
    }

encodeOrdersEvent :: OrdersEvent -> Value
encodeOrdersEvent = \case
  OrderRecorded payload ->
    object
      [ "kind" .= ("OrderRecorded" :: Text)
      , "amount" .= payload.amount
      , "orderPayload" .= toJSON payload.orderPayload
      , "sharedReference" .= toJSON payload.sharedReference
      ]

parseOrdersEvent :: EventType -> Value -> Either Text OrdersEvent
parseOrdersEvent (EventType tag) = mapLeftText . parseEither (withObject "OrdersEvent" go)
  where
    go o = do
      case tag of
        "OrderRecorded" ->
          OrderRecorded
            <$> ( OrderRecordedData
                    <$> o .: "amount"
                    <*> o .: "orderPayload"
                    <*> o .: "sharedReference"
                )
        _ -> fail ("unknown event type " <> show tag <> "; expected one of: " <> renderExpectedEventTypes ordersEventTypes)

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

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