Codec.hs

{-# LANGUAGE OverloadedRecordDot #-}
-- @generated by keiro-dsl 0.8.0.0 (language keiro-dsl 4) from aggregate Surge; do not edit.
module Generated.SurgeDemo.Surge.Codec (
    surgeCodec,
    parseSurgeEvent,
    encodeSurgeEvent,
) where

import Generated.SurgeDemo.Surge.Domain
import Generated.SurgeDemo.Nominals (HospitalId, hospitalIdText)
import Generated.SurgeDemo.Nominals.Internal (unsafeHospitalIdFromLegacyText)
import Data.Aeson (Value, object, withObject, withText, (.:), (.=))
import Data.Aeson.Types (Parser, explicitParseField, parseEither)
import Data.List.NonEmpty (NonEmpty (..))
import Data.Text (Text)
import qualified Data.Text as T
import Keiro.Codec (Codec (..), EventType (..))





surgeCodec :: Codec SurgeEvent
surgeCodec =
  Codec
    { eventTypes = EventType "SurgeThresholdNoted" :| [EventType "SurgeTimerFired"]
    , eventType = \case
        SurgeThresholdNoted{} -> EventType "SurgeThresholdNoted"
        SurgeTimerFired{} -> EventType "SurgeTimerFired"
    , schemaVersion = 1
    , encode = encodeSurgeEvent
    , decode = parseSurgeEvent
    , upcasters = []
    }

encodeSurgeEvent :: SurgeEvent -> Value
encodeSurgeEvent = \case
  SurgeThresholdNoted payload ->
    object
      [ "kind" .= ("SurgeThresholdNoted" :: Text)
      , "hospitalId" .= hospitalIdText payload.hospitalId
      ]
  SurgeTimerFired payload ->
    object
      [ "kind" .= ("SurgeTimerFired" :: Text)
      , "hospitalId" .= hospitalIdText payload.hospitalId
      ]

parseSurgeEvent :: EventType -> Value -> Either Text SurgeEvent
parseSurgeEvent (EventType tag) = mapLeftText . parseEither (withObject "SurgeEvent" go)
  where
    go o = do
      case tag of
        "SurgeThresholdNoted" ->
          SurgeThresholdNoted
            <$> ( SurgeThresholdNotedData
                    <$> (unsafeHospitalIdFromLegacyText <$> o .: "hospitalId")
                )
        "SurgeTimerFired" ->
          SurgeTimerFired
            <$> ( SurgeTimerFiredData
                    <$> (unsafeHospitalIdFromLegacyText <$> o .: "hospitalId")
                )
        _ -> fail ("unknown event type " <> show tag <> "; expected one of: SurgeThresholdNoted, SurgeTimerFired")

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