Bootstrapped my haskell client

1 files changed, 69 insertions, 0 deletions

diff --git a/haskell/src/SpaceTraders/APIClient/Client.hs b/haskell/src/SpaceTraders/APIClient/Client.hs
new file mode 100644
index 0000000..e4744aa
--- /dev/null
+++ b/haskell/src/SpaceTraders/APIClient/Client.hs
@@ -0,0 +1,69 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module SpaceTraders.APIClient.Client
+  ( APIError(..)
+  , APIMessage(..)
+  , defaultReq
+  , fromJSONValue
+  , send
+  , tokenReq
+  ) where
+
+import Control.Exception
+import Control.Monad
+import Data.Aeson
+import Data.Aeson.Types
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import Network.HTTP.Simple
+import Network.HTTP.Types.Status
+
+data APIError = APIError { apiErrorCode :: Int
+                         , apiErrorMessage :: T.Text
+                         } deriving Show
+instance Exception APIError
+instance FromJSON APIError where
+  parseJSON (Object o) = do
+    e <- o .: "error"
+    APIError <$> e .: "code"
+             <*> e .: "message"
+  parseJSON _ = mzero
+
+data APIMessage = APIMessage { data_ :: Value } deriving (Show)
+instance FromJSON APIMessage where
+  parseJSON (Object o) = APIMessage <$> o .: "data"
+  parseJSON _ = mzero
+
+defaultReq :: Request
+defaultReq = setRequestHost "api.spacetraders.io"
+           $ setRequestPort 443
+           $ setRequestSecure True
+           $ setRequestHeader "Content-Type" ["application/json"]
+           $ defaultRequest
+
+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 (Either APIError a)
+send 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{apiErrorCode = -1000, apiErrorMessage = T.pack $ concat ["Error decoding JSON APIMessage: ", e]}
+      Right r -> case fromJSONValue (data_ r) of
+        Left e -> return $ Left APIError{apiErrorCode = -1001, apiErrorMessage = T.pack $ concat ["Error decoding JSON message contents: ", e]}
+        Right m -> return $ Right m
+    else case eitherDecode body of
+      Left e -> return $ Left APIError{apiErrorCode = -status, apiErrorMessage = T.pack $ concat ["Error decoding JSON APIError: ", e, ". Got HTTP body: ", show body]}
+      Right e -> return $ Left e
+
+--handleAPIError :: SomeException -> IO (Maybe RegisterMessage)
+--handleAPIError e = do
+--  print e
+--  return Nothing