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33 lines
858 B
Haskell
33 lines
858 B
Haskell
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module Types where
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import Control.Exception (SomeException)
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class Status s where
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ok :: s -> Bool
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ok = const False
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disp :: s -> String
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disp = const "encountered bad response (expected OK)"
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newtype ResponseCode = ResponseCode Int
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instance Status ResponseCode where
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ok (ResponseCode code) = code == 200
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disp (ResponseCode code) =
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"encountered bad response code: "
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++ show code
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++ " (expected 200 'OK')"
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newtype ResponseMsg = ResponseMsg String
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instance Status ResponseMsg where
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ok (ResponseMsg msg) = msg == "success"
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disp (ResponseMsg msg) =
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"encountered bad response message: "
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++ msg
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++ " (expected 'success')"
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toResponseMsg :: SomeException -> ResponseMsg
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toResponseMsg = ResponseMsg . show
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genericErr :: ResponseMsg
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genericErr = ResponseMsg "encountered unknown error"
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