First try at doing JSON stuff.
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src/App/Messages.purs
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49
src/App/Messages.purs
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module App.Messages where
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import Effect (Effect)
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import Data.Argonaut.Core as J
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import Data.Codec.Argonaut as CA
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import Data.Either
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import Data.Codec.Argonaut.Record as CAR
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-- Base types.
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type Email = String
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type Password = String
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type Login = { email :: Email, password :: Password }
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type Token = { token :: String }
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-- Their related JSON codecs.
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login_codec ∷ CA.JsonCodec Login
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login_codec = CA.object "Login" (CAR.record { email: CA.string, password: CA.string })
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token_codec ∷ CA.JsonCodec Token
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token_codec = CA.object "Token" (CAR.record { token: CA.string })
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-- All possible requests.
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data RequestMessage
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= MessageLogin Login
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-- All possible answers.
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data AnswerMessage
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= Logged Token
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encodeRequest ∷ RequestMessage → J.Json
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encodeRequest m = case m of
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(MessageLogin login) -> CA.encode login_codec login
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-- TODO
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--rawSerialize :: RequestMessage -> ArrayBuffer
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--rawDeserialize :: ArrayBuffer -> AnswerMessage
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data DecodeError
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= JSONERROR CA.JsonDecodeError
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| UnknownNumber
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decodeAnswer :: Int -> J.Json -> Either DecodeError AnswerMessage
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decodeAnswer number json
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= case number of
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-- TODO: take right values
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11 -> case (CA.decode token_codec json) of
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(Left err) -> Left (JSONERROR err)
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(Right v) -> Right (Logged v)
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_ -> Left UnknownNumber
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