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|
{-# LANGUAGE NumericUnderscores #-}
{-# LANGUAGE OverloadedStrings #-}
module SpaceTraders.APIClient.Client
( APIError(..)
, APIMessage(..)
, APIPaginatedResponse
, APIResponse
, defaultReq
, fromJSONValue
, paginatedReq
, send
, sendPaginated
, tokenReq
) where
import Control.Concurrent
import Data.Aeson
import Data.Aeson.Types
import qualified Data.ByteString as B
import qualified Data.ByteString.Internal as B
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import Network.HTTP.Simple
import Network.HTTP.Types.Status
import SpaceTraders.APIClient.Errors
import SpaceTraders.APIClient.Pagination
data FromJSON a => APIMessage a = APIMessage { messageData :: a
, messagePagination :: Maybe Pagination
} deriving (Show)
instance FromJSON a => FromJSON (APIMessage a) where
parseJSON = withObject "APIMessage" $ \o ->
APIMessage <$> o .: "data"
<*> o .:? "meta"
type APIPaginatedResponse a = Either APIError (APIMessage a)
type APIResponse a = Either APIError a
defaultReq :: Request
defaultReq = setRequestHost "api.spacetraders.io"
$ setRequestPort 443
$ setRequestSecure True
$ setRequestHeader "Content-Type" ["application/json"]
$ defaultRequest
paginatedReq :: T.Text -> Maybe Pagination -> Request
paginatedReq token Nothing = setRequestQueryString [("limit", Just "20")]
$ tokenReq token
paginatedReq token (Just myPage) = setRequestQueryString [("limit", Just . int2ByteString $ limit myPage), ("page", Just . int2ByteString $ page myPage)]
$ tokenReq token
where
int2ByteString = B.pack . map B.c2w . show
tokenReq :: T.Text -> Request
tokenReq token = setRequestHeader "Authorization" [T.encodeUtf8 $ "Bearer " <> token]
$ defaultReq
fromJSONValue :: FromJSON a => Value -> Either String a
fromJSONValue = parseEither parseJSON
send :: FromJSON a => Request -> IO (APIResponse a)
send request = do
response <- sendPaginated request
case response of
Left e -> return $ Left e
Right (APIMessage d _) -> return $ Right d
sendPaginated :: FromJSON a => Request -> IO (APIPaginatedResponse a)
sendPaginated request = do
response <- httpLbs request
let status = statusCode $ getResponseStatus response
body = getResponseBody response
if status >= 200 && status <= 299
then case eitherDecode body of
Left e -> return . Left $ APIError (-1000) (T.pack $ concat ["Error decoding JSON APIMessage: ", e]) Null
Right r -> return $ Right r
else case eitherDecode body of
Left e -> return . Left $ APIError (-status) (T.pack $ concat ["Error decoding JSON APIError: ", e, ". Got HTTP body: ", show body]) Null
Right (APIRateLimit r) -> do
threadDelay (1_000_000 * (round $ retryAfter r))
sendPaginated request
Right e -> return $ Left e
|
