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23 lines
758 B
23 lines
758 B
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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module Worldcup.EventsTeams (EventTeam(..), parseEventsTeams) where
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import Data.Aeson
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import Data.Aeson.Types
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import Prelude as P
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data EventTeam = EventTeam {
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eventTeamId :: Int } deriving (Show)
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instance FromJSON EventTeam where
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parseJSON = withObject "team" $ \o -> do
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eventTeamId <- o .: "team_id"
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return EventTeam{..}
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parseEventsTeams :: Either String [Value] -> [Int]
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parseEventsTeams (Left x) = error x
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parseEventsTeams (Right xs) = P.foldl reduce [] xs where
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reduce acc x = case (parseEither parseJSON x :: Either String EventTeam) of
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(Left s) -> error s
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(Right v) -> eventTeamId v : acc
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