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module Util.Ajax
( postJson
, putJson
, delete
) where
import Control.Arrow (left)
import Data.Aeson (FromJSON, ToJSON)
import qualified Data.Aeson as Aeson
import Data.ByteString (ByteString)
import qualified Data.ByteString.Lazy as LBS
import Data.Default (def)
import qualified Data.Map.Lazy as LM
import Data.Text (Text)
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import Reflex.Dom (Dynamic, Event, IsXhrPayload,
MonadWidget, XhrRequest,
XhrRequestConfig (..), XhrResponse,
XhrResponseHeaders (..))
import qualified Reflex.Dom as R
postJson
:: forall t m a b. (MonadWidget t m, ToJSON a, FromJSON b)
=> Text
-> Event t a
-> m (Event t (Either Text b))
postJson url input =
fmap getJsonResult <$>
R.performRequestAsync (jsonRequest "POST" url <$> input)
putJson
:: forall t m a b. (MonadWidget t m, ToJSON a, FromJSON b)
=> Text
-> Event t a
-> m (Event t (Either Text b))
putJson url input =
fmap getJsonResult <$>
R.performRequestAsync (jsonRequest "PUT" url <$> input)
delete
:: forall t m a. (MonadWidget t m)
=> Dynamic t Text
-> Event t ()
-> m (Event t (Either Text Text))
delete url fire = do
fmap getResult <$>
(R.performRequestAsync $
R.attachWith (\u _ -> request "DELETE" u ()) (R.current url) fire)
getJsonResult :: forall a. (FromJSON a) => XhrResponse -> Either Text a
getJsonResult response =
case getResult response of
Left l -> Left l
Right r -> left T.pack . Aeson.eitherDecodeStrict $ (T.encodeUtf8 r)
getResult :: XhrResponse -> Either Text Text
getResult response =
case R._xhrResponse_responseText response of
Just responseText ->
if R._xhrResponse_status response == 200
then Right responseText
else Left responseText
_ -> Left "NoKey"
request :: forall a. (IsXhrPayload a) => Text -> Text -> a -> XhrRequest a
request method url payload =
let
config = XhrRequestConfig
{ _xhrRequestConfig_headers = def
, _xhrRequestConfig_user = def
, _xhrRequestConfig_password = def
, _xhrRequestConfig_responseType = def
, _xhrRequestConfig_responseHeaders = def
, _xhrRequestConfig_withCredentials = False
, _xhrRequestConfig_sendData = payload
}
in
R.xhrRequest method url config
jsonRequest :: forall a. (ToJSON a) => Text -> Text -> a -> XhrRequest ByteString
jsonRequest method url payload =
let
config = XhrRequestConfig
{ _xhrRequestConfig_headers = def
, _xhrRequestConfig_user = def
, _xhrRequestConfig_password = def
, _xhrRequestConfig_responseType = def
, _xhrRequestConfig_responseHeaders = def
, _xhrRequestConfig_withCredentials = False
, _xhrRequestConfig_sendData = LBS.toStrict $ Aeson.encode payload
}
in
R.xhrRequest method url config
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