generated from tpl/purs
47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
module Test.Config where
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import Prelude
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import Control.Monad.Error.Class (throwError)
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import Data.Either (Either(..))
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import Data.Map (fromFoldable) as Map
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import Data.Newtype (un)
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import Data.Validation.Semigroup (V(..))
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import Database.PostgreSQL (Configuration)
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import Dotenv (loadFile) as DotEnv
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import Effect.Aff (Aff)
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import Effect.Class (liftEffect)
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import Effect.Exception (error)
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import Foreign.Object (toUnfoldable) as Object
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import Node.Process (getEnv)
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import Polyform.Batteries.Env (Env, Validator) as Env
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import Polyform.Batteries.Env (MissingValue)
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import Polyform.Batteries.Env.Validators (optional, required) as Env
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import Polyform.Batteries.Int (IntExpected)
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import Polyform.Batteries.Int (validator) as Int
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import Polyform.Validator (runValidator)
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import Type.Row (type (+))
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validator
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∷ ∀ err m
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. Monad m
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⇒ Env.Validator m (IntExpected + MissingValue + err) Env.Env Configuration
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validator =
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{ database: _, host: _, idleTimeoutMillis: _, max: _, password: _, port: _, user: _ }
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<$> Env.required "PG_DB" identity
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<*> Env.optional "PG_HOST" identity
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<*> Env.optional "PG_IDLE_TIMEOUT_MILLISECONDS" Int.validator
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<*> Env.optional "PG_MAX" Int.validator
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<*> Env.optional "PG_PASSWORD" identity
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<*> Env.optional "PG_PORT" Int.validator
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<*> Env.optional "PG_USER" identity
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load ∷ Aff Configuration
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load = do
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void $ DotEnv.loadFile
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env ← liftEffect $ getEnv <#> (Object.toUnfoldable ∷ _ → Array _) >>> Map.fromFoldable
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runValidator validator env >>= un V
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>>> case _ of
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Left _ → do
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throwError $ error "Configuration error. Please verify your environment and .env file."
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Right p → pure p
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