{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
#ifdef USE_TEMPLATE_HASKELL
{-# LANGUAGE TemplateHaskell #-}
#endif
{-# LANGUAGE TypeOperators #-}

-- | A module for performing asynchronous HTTP calls from JavaScript
-- using the
-- <https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest XMLHttpRequest>
-- API (essentially AJAX). Despite the name, there is nothing whatsoever specific to XML.
--
-- The API has two components:
--
--  * convenient functions for common usecases like GET and POST
--    requests to APIs using JSON.
--
--  * a flexible set of functions for creating and executing arbitrary
--    requests and handling responses.
--
module Reflex.Dom.Xhr
  ( -- * Common Patterns

    -- | Functions that conveniently expose common uses like GET and
    -- POST to JSON APIs.
    getAndDecode
  , getMay
  , postJson

  , decodeXhrResponse
  , decodeText

  -- * General Request API

  -- | This is the most general flow for sending XHR requests:
  --
  --   1. Create an 'Event' stream of 'XhrRequest' records (ie
  --   @Event t (XhrRequest a)@). The records configure the request,
  --   and the 'Event' controls when the request or requests are
  --   actually sent.
  --
  --   2. Plug the @Event t (XhrRequest a)@ into one of the functions
  --   for performing requests like 'performRequestAsync'.
  --
  --   3. Consume the resulting stream of 'XhrResponse' events,
  --   parsing the body of the response however appropriate. A really
  --   common pattern is turning the 'Event' into a 'Dynamic' with
  --   'holdDyn' or a related function.
  --
  -- Here is an example of calling a search API whenever the user
  -- types in a text input field and printing the result on the page:
  --
  -- @
  -- url query = "http:\/\/example.com\/search?query=" \<> query
  --
  -- search queries = do
  --   responses \<- performRequestAsync $ toRequest \<$> queries
  --   return $ view xhrResponse_responseText \<$> responses
  --   where toRequest query = XhrRequest \"GET" (url query) def
  --
  -- main = mainWidget $ do
  --   input \<- textInput def
  --   let queries = updated $ input ^. textInput_value
  --   results \<- search queries
  --   asText \<- holdDyn "No results." $ pack . show \<$> results
  --   dynText asText
  -- @

  -- ** XHR Requests
  , XhrRequest (..)
  , XhrRequestConfig (..)

  , xhrRequest
  , xhrRequestConfig_headers
  , xhrRequestConfig_password
  , xhrRequestConfig_responseType
  , xhrRequestConfig_sendData
  , xhrRequestConfig_user
  , xhrRequestConfig_withCredentials
  , xhrRequestConfig_responseHeaders
  , xhrRequest_config
  , xhrRequest_method
  , xhrRequest_url

  -- ** Performing Requests
  , performMkRequestAsync
  , performMkRequestsAsync
  , performRequestAsync
  , performRequestAsyncWithError
  , performRequestsAsync
  , performRequestsAsyncWithError

  -- ** XHR Responses
  , XhrResponse (..)
  , XhrResponseBody (..)
  , XhrResponseHeaders (..)
  , XhrResponseType (..)

  , xhrResponse_response
  , xhrResponse_responseText
  , xhrResponse_status
  , xhrResponse_statusText
  , xhrResponse_headers

  -- *** Deprecated
  , xhrResponse_body
  , _xhrResponse_body

  -- ** Error Handling
  , XhrException (..)
  , IsXhrPayload (..)

  -- * JavaScript XMLHttpRequest Objects

  -- | 'XMLHttpRequest' is the type of JavaScript's underlying runtime
  -- objects that represent XHR requests.
  --
  -- Chances are you shouldn't need these in day-to-day code.
  , XMLHttpRequest

  -- ** Constructors
  , newXMLHttpRequest
  , newXMLHttpRequestWithError

  -- ** Fields
  , xmlHttpRequestGetReadyState
  , xmlHttpRequestGetResponseText
  , xmlHttpRequestGetStatus
  , xmlHttpRequestGetStatusText
  , xmlHttpRequestNew
  , xmlHttpRequestOnreadystatechange
  , xmlHttpRequestOpen
  , xmlHttpRequestSetRequestHeader
  , xmlHttpRequestSetResponseType
  )
where

import Reflex.Class
import Reflex.Dom.Class
import Reflex.PerformEvent.Class
import Reflex.TriggerEvent.Class
import Reflex.Dom.Xhr.Exception
import Reflex.Dom.Xhr.Foreign
import Reflex.Dom.Xhr.ResponseType

import Control.Concurrent
import Control.Exception (handle)
import Control.Lens
import Control.Monad hiding (forM)
import Control.Monad.IO.Class
import Data.Aeson
#if MIN_VERSION_aeson(1,0,0)
import Data.Aeson.Text
#else
import Data.Aeson.Encode
#endif
import qualified Data.ByteString.Lazy as BL
import Data.CaseInsensitive (CI)
import qualified Data.CaseInsensitive as CI
import Data.Default
import qualified Data.List as L
import Data.Map (Map)
import qualified Data.Map as Map
import Data.Maybe
import qualified Data.Set as Set
import Data.Text (Text)
import qualified Data.Text as T
import Data.Text.Encoding
import qualified Data.Text.Lazy as LT
import qualified Data.Text.Lazy.Builder as B
import Data.Traversable

import Language.Javascript.JSaddle.Monad (JSM, askJSM, runJSM, MonadJSM, liftJSM)

data XhrRequest a
   = XhrRequest { forall a. XhrRequest a -> Text
_xhrRequest_method :: Text
                , forall a. XhrRequest a -> Text
_xhrRequest_url :: Text
                , forall a. XhrRequest a -> XhrRequestConfig a
_xhrRequest_config :: XhrRequestConfig a
                }
   deriving (Int -> XhrRequest a -> ShowS
[XhrRequest a] -> ShowS
XhrRequest a -> String
(Int -> XhrRequest a -> ShowS)
-> (XhrRequest a -> String)
-> ([XhrRequest a] -> ShowS)
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data XhrRequestConfig a
   = XhrRequestConfig { forall a. XhrRequestConfig a -> Map Text Text
_xhrRequestConfig_headers :: Map Text Text
                      , forall a. XhrRequestConfig a -> Maybe Text
_xhrRequestConfig_user :: Maybe Text
                      , forall a. XhrRequestConfig a -> Maybe Text
_xhrRequestConfig_password :: Maybe Text
                      , forall a. XhrRequestConfig a -> Maybe XhrResponseType
_xhrRequestConfig_responseType :: Maybe XhrResponseType
                      , forall a. XhrRequestConfig a -> a
_xhrRequestConfig_sendData :: a
                      , forall a. XhrRequestConfig a -> Bool
_xhrRequestConfig_withCredentials :: Bool
                      , forall a. XhrRequestConfig a -> XhrResponseHeaders
_xhrRequestConfig_responseHeaders :: XhrResponseHeaders
                      }
   deriving (Int -> XhrRequestConfig a -> ShowS
[XhrRequestConfig a] -> ShowS
XhrRequestConfig a -> String
(Int -> XhrRequestConfig a -> ShowS)
-> (XhrRequestConfig a -> String)
-> ([XhrRequestConfig a] -> ShowS)
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data XhrResponse
   = XhrResponse { XhrResponse -> Word
_xhrResponse_status :: Word
                 , XhrResponse -> Text
_xhrResponse_statusText :: Text
                 , XhrResponse -> Maybe XhrResponseBody
_xhrResponse_response :: Maybe XhrResponseBody
                 , XhrResponse -> Maybe Text
_xhrResponse_responseText :: Maybe Text
                 , XhrResponse -> Map (CI Text) Text
_xhrResponse_headers :: Map (CI Text) Text
                 }

data XhrResponseHeaders =
    OnlyHeaders (Set.Set (CI Text)) -- ^ Parse a subset of headers from the XHR Response
  | AllHeaders -- ^ Parse all headers from the XHR Response
  deriving (Int -> XhrResponseHeaders -> ShowS
[XhrResponseHeaders] -> ShowS
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instance Default XhrResponseHeaders where
  def :: XhrResponseHeaders
def = Set (CI Text) -> XhrResponseHeaders
OnlyHeaders Set (CI Text)
forall a. Monoid a => a
mempty

{-# DEPRECATED _xhrResponse_body "Use _xhrResponse_response or _xhrResponse_responseText instead." #-}
_xhrResponse_body :: XhrResponse -> Maybe Text
_xhrResponse_body :: XhrResponse -> Maybe Text
_xhrResponse_body = XhrResponse -> Maybe Text
_xhrResponse_responseText

{-# DEPRECATED xhrResponse_body "Use xhrResponse_response or xhrResponse_responseText instead." #-}
xhrResponse_body :: Lens' XhrResponse (Maybe Text)
xhrResponse_body :: Lens' XhrResponse (Maybe Text)
xhrResponse_body = (XhrResponse -> Maybe Text)
-> (XhrResponse -> Maybe Text -> XhrResponse)
-> Lens' XhrResponse (Maybe Text)
forall s a b t. (s -> a) -> (s -> b -> t) -> Lens s t a b
lens XhrResponse -> Maybe Text
_xhrResponse_responseText (\XhrResponse
r Maybe Text
t -> XhrResponse
r { _xhrResponse_responseText = t })

instance a ~ () => Default (XhrRequestConfig a) where
  def :: XhrRequestConfig a
def = XhrRequestConfig { _xhrRequestConfig_headers :: Map Text Text
_xhrRequestConfig_headers = Map Text Text
forall k a. Map k a
Map.empty
                         , _xhrRequestConfig_user :: Maybe Text
_xhrRequestConfig_user = Maybe Text
forall a. Maybe a
Nothing
                         , _xhrRequestConfig_password :: Maybe Text
_xhrRequestConfig_password  = Maybe Text
forall a. Maybe a
Nothing
                         , _xhrRequestConfig_responseType :: Maybe XhrResponseType
_xhrRequestConfig_responseType  = Maybe XhrResponseType
forall a. Maybe a
Nothing
                         , _xhrRequestConfig_sendData :: ()
_xhrRequestConfig_sendData  = ()
                         , _xhrRequestConfig_withCredentials :: Bool
_xhrRequestConfig_withCredentials = Bool
False
                         , _xhrRequestConfig_responseHeaders :: XhrResponseHeaders
_xhrRequestConfig_responseHeaders = XhrResponseHeaders
forall a. Default a => a
def
                         }

-- | Construct a request object from method, URL, and config record.
xhrRequest :: Text -> Text -> XhrRequestConfig a -> XhrRequest a
xhrRequest :: forall a. Text -> Text -> XhrRequestConfig a -> XhrRequest a
xhrRequest = Text -> Text -> XhrRequestConfig a -> XhrRequest a
forall a. Text -> Text -> XhrRequestConfig a -> XhrRequest a
XhrRequest

-- | Make a new asyncronous XHR request. This does not block (it forks),
-- and returns an XHR object immediately (which you can use to abort
-- the XHR connection), and will pass an exception ('XhrException') to the
-- continuation if the connection cannot be made (or is aborted).
newXMLHttpRequestWithError
    :: (MonadJSM m, IsXhrPayload a)
    => XhrRequest a
    -- ^ The request to make.
    -> (Either XhrException XhrResponse -> JSM ())
    -- ^ A continuation to be called once a response comes back, or in
    -- case of error.
    -> m XMLHttpRequest
    -- ^ The XHR request, which could for example be aborted.
newXMLHttpRequestWithError :: forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequestWithError XhrRequest a
req Either XhrException XhrResponse -> JSM ()
cb = do
  xhr <- m XMLHttpRequest
forall (m :: * -> *). MonadJSM m => m XMLHttpRequest
xmlHttpRequestNew
  ctx <- askJSM
  void $ liftIO $ forkIO $ handle ((`runJSM` ctx) . cb . Left) $ void . (`runJSM` ctx) $ do
    let c = XhrRequest a -> XhrRequestConfig a
forall a. XhrRequest a -> XhrRequestConfig a
_xhrRequest_config XhrRequest a
req
        rt = XhrRequestConfig a -> Maybe XhrResponseType
forall a. XhrRequestConfig a -> Maybe XhrResponseType
_xhrRequestConfig_responseType XhrRequestConfig a
c
        creds = XhrRequestConfig a -> Bool
forall a. XhrRequestConfig a -> Bool
_xhrRequestConfig_withCredentials XhrRequestConfig a
c
    xmlHttpRequestOpen
      xhr
      (_xhrRequest_method req)
      (_xhrRequest_url req)
      True
      (fromMaybe "" $ _xhrRequestConfig_user c)
      (fromMaybe "" $ _xhrRequestConfig_password c)
    iforM_ (_xhrRequestConfig_headers c) $ xmlHttpRequestSetRequestHeader xhr
    maybe (return ()) (xmlHttpRequestSetResponseType xhr . fromResponseType) rt
    xmlHttpRequestSetWithCredentials xhr creds
    _ <- xmlHttpRequestOnreadystatechange xhr $ do
      readyState <- xmlHttpRequestGetReadyState xhr
      status <- xmlHttpRequestGetStatus xhr
      statusText <- xmlHttpRequestGetStatusText xhr
      when (readyState == 4) $ do
        t <- if rt == Just XhrResponseType_Text || isNothing rt
             then xmlHttpRequestGetResponseText xhr
             else return Nothing
        r <- xmlHttpRequestGetResponse xhr
        h <- case _xhrRequestConfig_responseHeaders c of
          XhrResponseHeaders
AllHeaders -> Text -> Map (CI Text) Text
parseAllHeadersString (Text -> Map (CI Text) Text)
-> ReaderT Event JSM Text -> ReaderT Event JSM (Map (CI Text) Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$>
            XMLHttpRequest -> ReaderT Event JSM Text
forall (m :: * -> *). MonadJSM m => XMLHttpRequest -> m Text
xmlHttpRequestGetAllResponseHeaders XMLHttpRequest
xhr
          OnlyHeaders Set (CI Text)
xs -> (Text -> ReaderT Event JSM Text)
-> Map (CI Text) Text -> ReaderT Event JSM (Map (CI Text) Text)
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> Map (CI Text) a -> f (Map (CI Text) b)
traverse (XMLHttpRequest -> Text -> ReaderT Event JSM Text
forall header (m :: * -> *).
(ToJSString header, MonadJSM m) =>
XMLHttpRequest -> header -> m Text
xmlHttpRequestGetResponseHeader XMLHttpRequest
xhr)
            ((CI Text -> Text) -> Set (CI Text) -> Map (CI Text) Text
forall k a. (k -> a) -> Set k -> Map k a
Map.fromSet CI Text -> Text
forall s. CI s -> s
CI.original Set (CI Text)
xs)
        _ <- liftJSM $ cb $ Right
             XhrResponse { _xhrResponse_status = status
                         , _xhrResponse_statusText = statusText
                         , _xhrResponse_response = r
                         , _xhrResponse_responseText = t
                         , _xhrResponse_headers = h
                         }
        return ()
    _ <- xmlHttpRequestSend xhr (_xhrRequestConfig_sendData c)
    return ()
  return xhr

parseAllHeadersString :: Text -> Map (CI Text) Text
parseAllHeadersString :: Text -> Map (CI Text) Text
parseAllHeadersString Text
s = [(CI Text, Text)] -> Map (CI Text) Text
forall k a. Ord k => [(k, a)] -> Map k a
Map.fromList ([(CI Text, Text)] -> Map (CI Text) Text)
-> [(CI Text, Text)] -> Map (CI Text) Text
forall a b. (a -> b) -> a -> b
$ (Text -> (CI Text, Text)) -> [Text] -> [(CI Text, Text)]
forall a b. (a -> b) -> [a] -> [b]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ((Text, Text) -> (CI Text, Text)
stripBoth ((Text, Text) -> (CI Text, Text))
-> (Text -> (Text, Text)) -> Text -> (CI Text, Text)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Char -> Bool) -> Text -> (Text, Text)
T.span (Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
/=Char
':')) ([Text] -> [(CI Text, Text)]) -> [Text] -> [(CI Text, Text)]
forall a b. (a -> b) -> a -> b
$
  (Text -> Bool) -> [Text] -> [Text]
forall a. (a -> Bool) -> [a] -> [a]
L.dropWhileEnd Text -> Bool
T.null ([Text] -> [Text]) -> [Text] -> [Text]
forall a b. (a -> b) -> a -> b
$ HasCallStack => Text -> Text -> [Text]
Text -> Text -> [Text]
T.splitOn (String -> Text
T.pack String
"\r\n") Text
s
  where stripBoth :: (Text, Text) -> (CI Text, Text)
stripBoth (Text
txt1, Text
txt2) = (Text -> CI Text
forall s. FoldCase s => s -> CI s
CI.mk (Text -> CI Text) -> Text -> CI Text
forall a b. (a -> b) -> a -> b
$ Text -> Text
T.strip Text
txt1, Text -> Text
T.strip (Text -> Text) -> Text -> Text
forall a b. (a -> b) -> a -> b
$ Int -> Text -> Text
T.drop Int
1 Text
txt2)

newXMLHttpRequest :: (MonadJSM m, IsXhrPayload a) => XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest :: forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest XhrRequest a
req XhrResponse -> JSM ()
cb = XhrRequest a
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequestWithError XhrRequest a
req ((Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest)
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
forall a b. (a -> b) -> a -> b
$ (XhrResponse -> JSM ())
-> Either XhrException XhrResponse -> JSM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ XhrResponse -> JSM ()
cb

-- | Given Event of requests, issue them when the Event fires.
-- Returns Event of corresponding responses.
--
-- The request is processed asynchronously, therefore handling does
-- not block or cause a delay while creating the connection.
performRequestAsyncWithError
    :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, IsXhrPayload a)
    => Event t (XhrRequest a)
    -> m (Event t (Either XhrException XhrResponse))
performRequestAsyncWithError :: forall (m :: * -> *) t a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 IsXhrPayload a) =>
Event t (XhrRequest a)
-> m (Event t (Either XhrException XhrResponse))
performRequestAsyncWithError = (XhrRequest a
 -> (Either XhrException XhrResponse -> JSM ())
 -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest a))
-> m (Event t (Either XhrException XhrResponse))
forall (m :: * -> *) t p a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m) =>
(XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest p)) -> m (Event t a)
performRequestAsync' XhrRequest a
-> (Either XhrException XhrResponse -> JSM ())
-> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequestWithError (Event t (Performable m (XhrRequest a))
 -> m (Event t (Either XhrException XhrResponse)))
-> (Event t (XhrRequest a)
    -> Event t (Performable m (XhrRequest a)))
-> Event t (XhrRequest a)
-> m (Event t (Either XhrException XhrResponse))
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (XhrRequest a -> Performable m (XhrRequest a))
-> Event t (XhrRequest a) -> Event t (Performable m (XhrRequest a))
forall a b. (a -> b) -> Event t a -> Event t b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap XhrRequest a -> Performable m (XhrRequest a)
forall a. a -> Performable m a
forall (m :: * -> *) a. Monad m => a -> m a
return

-- | Given Event of request, issue them when the Event fires.  Returns Event of corresponding response.
performRequestAsync :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, IsXhrPayload a) => Event t (XhrRequest a) -> m (Event t XhrResponse)
performRequestAsync :: forall (m :: * -> *) t a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 IsXhrPayload a) =>
Event t (XhrRequest a) -> m (Event t XhrResponse)
performRequestAsync = (XhrRequest a
 -> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest a))
-> m (Event t XhrResponse)
forall (m :: * -> *) t p a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m) =>
(XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest p)) -> m (Event t a)
performRequestAsync' XhrRequest a
-> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest (Event t (Performable m (XhrRequest a)) -> m (Event t XhrResponse))
-> (Event t (XhrRequest a)
    -> Event t (Performable m (XhrRequest a)))
-> Event t (XhrRequest a)
-> m (Event t XhrResponse)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (XhrRequest a -> Performable m (XhrRequest a))
-> Event t (XhrRequest a) -> Event t (Performable m (XhrRequest a))
forall a b. (a -> b) -> Event t a -> Event t b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap XhrRequest a -> Performable m (XhrRequest a)
forall a. a -> Performable m a
forall (m :: * -> *) a. Monad m => a -> m a
return

-- | Given Event with an action that creates a request, build and issue the request when the Event fires.  Returns Event of corresponding response.
performMkRequestAsync :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, IsXhrPayload a) => Event t (Performable m (XhrRequest a)) -> m (Event t XhrResponse)
performMkRequestAsync :: forall (m :: * -> *) t a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 IsXhrPayload a) =>
Event t (Performable m (XhrRequest a)) -> m (Event t XhrResponse)
performMkRequestAsync = (XhrRequest a
 -> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest a))
-> m (Event t XhrResponse)
forall (m :: * -> *) t p a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m) =>
(XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest p)) -> m (Event t a)
performRequestAsync' XhrRequest a
-> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest

performRequestAsync' :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m) => (XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest) -> Event t (Performable m (XhrRequest p)) -> m (Event t a)
performRequestAsync' :: forall (m :: * -> *) t p a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m) =>
(XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (XhrRequest p)) -> m (Event t a)
performRequestAsync' XhrRequest p -> (a -> JSM ()) -> Performable m XMLHttpRequest
newXhr Event t (Performable m (XhrRequest p))
req = Event t ((a -> IO ()) -> Performable m ()) -> m (Event t a)
forall t (m :: * -> *) a.
(TriggerEvent t m, PerformEvent t m) =>
Event t ((a -> IO ()) -> Performable m ()) -> m (Event t a)
performEventAsync (Event t ((a -> IO ()) -> Performable m ()) -> m (Event t a))
-> Event t ((a -> IO ()) -> Performable m ()) -> m (Event t a)
forall a b. (a -> b) -> a -> b
$ Event t (Performable m (XhrRequest p))
-> (Performable m (XhrRequest p)
    -> (a -> IO ()) -> Performable m ())
-> Event t ((a -> IO ()) -> Performable m ())
forall (f :: * -> *) a b. Functor f => f a -> (a -> b) -> f b
ffor Event t (Performable m (XhrRequest p))
req ((Performable m (XhrRequest p) -> (a -> IO ()) -> Performable m ())
 -> Event t ((a -> IO ()) -> Performable m ()))
-> (Performable m (XhrRequest p)
    -> (a -> IO ()) -> Performable m ())
-> Event t ((a -> IO ()) -> Performable m ())
forall a b. (a -> b) -> a -> b
$ \Performable m (XhrRequest p)
hr a -> IO ()
cb -> do
  r <- Performable m (XhrRequest p)
hr
  _ <- newXhr r $ liftIO . cb
  return ()

-- | Issues a collection of requests when the supplied Event fires.
-- When ALL requests from a given firing complete, the results are
-- collected and returned via the return Event.
--
-- The requests are processed asynchronously, therefore handling does
-- not block or cause a delay while creating the connection.
--
-- Order of request execution and completion is not guaranteed, but
-- order of creation and the collection result is preserved.
performRequestsAsyncWithError
    :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, Traversable f, IsXhrPayload a)
    => Event t (f (XhrRequest a)) -> m (Event t (f (Either XhrException XhrResponse)))
performRequestsAsyncWithError :: forall (m :: * -> *) t (f :: * -> *) a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f, IsXhrPayload a) =>
Event t (f (XhrRequest a))
-> m (Event t (f (Either XhrException XhrResponse)))
performRequestsAsyncWithError = (XhrRequest a
 -> (Either XhrException XhrResponse -> JSM ())
 -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest a)))
-> m (Event t (f (Either XhrException XhrResponse)))
forall (m :: * -> *) t (f :: * -> *) b a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f) =>
(XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest b))) -> m (Event t (f a))
performRequestsAsync' XhrRequest a
-> (Either XhrException XhrResponse -> JSM ())
-> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a
-> (Either XhrException XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequestWithError (Event t (Performable m (f (XhrRequest a)))
 -> m (Event t (f (Either XhrException XhrResponse))))
-> (Event t (f (XhrRequest a))
    -> Event t (Performable m (f (XhrRequest a))))
-> Event t (f (XhrRequest a))
-> m (Event t (f (Either XhrException XhrResponse)))
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (f (XhrRequest a) -> Performable m (f (XhrRequest a)))
-> Event t (f (XhrRequest a))
-> Event t (Performable m (f (XhrRequest a)))
forall a b. (a -> b) -> Event t a -> Event t b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap f (XhrRequest a) -> Performable m (f (XhrRequest a))
forall a. a -> Performable m a
forall (m :: * -> *) a. Monad m => a -> m a
return

-- | Issues a collection of requests when the supplied Event fires.  When ALL requests from a given firing complete, the results are collected and returned via the return Event.
performRequestsAsync :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, Traversable f, IsXhrPayload a) => Event t (f (XhrRequest a)) -> m (Event t (f XhrResponse))
performRequestsAsync :: forall (m :: * -> *) t (f :: * -> *) a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f, IsXhrPayload a) =>
Event t (f (XhrRequest a)) -> m (Event t (f XhrResponse))
performRequestsAsync = (XhrRequest a
 -> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest a)))
-> m (Event t (f XhrResponse))
forall (m :: * -> *) t (f :: * -> *) b a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f) =>
(XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest b))) -> m (Event t (f a))
performRequestsAsync' XhrRequest a
-> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest (Event t (Performable m (f (XhrRequest a)))
 -> m (Event t (f XhrResponse)))
-> (Event t (f (XhrRequest a))
    -> Event t (Performable m (f (XhrRequest a))))
-> Event t (f (XhrRequest a))
-> m (Event t (f XhrResponse))
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (f (XhrRequest a) -> Performable m (f (XhrRequest a)))
-> Event t (f (XhrRequest a))
-> Event t (Performable m (f (XhrRequest a)))
forall a b. (a -> b) -> Event t a -> Event t b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap f (XhrRequest a) -> Performable m (f (XhrRequest a))
forall a. a -> Performable m a
forall (m :: * -> *) a. Monad m => a -> m a
return

-- | Builds and issues a collection of requests when the supplied Event fires.  When ALL requests from a given firing complete, the results are collected and returned via the return Event.
performMkRequestsAsync :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, Traversable f, IsXhrPayload a) => Event t (Performable m (f (XhrRequest a))) -> m (Event t (f XhrResponse))
performMkRequestsAsync :: forall (m :: * -> *) t (f :: * -> *) a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f, IsXhrPayload a) =>
Event t (Performable m (f (XhrRequest a)))
-> m (Event t (f XhrResponse))
performMkRequestsAsync = (XhrRequest a
 -> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest a)))
-> m (Event t (f XhrResponse))
forall (m :: * -> *) t (f :: * -> *) b a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f) =>
(XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest b))) -> m (Event t (f a))
performRequestsAsync' XhrRequest a
-> (XhrResponse -> JSM ()) -> Performable m XMLHttpRequest
forall (m :: * -> *) a.
(MonadJSM m, IsXhrPayload a) =>
XhrRequest a -> (XhrResponse -> JSM ()) -> m XMLHttpRequest
newXMLHttpRequest

performRequestsAsync' :: (MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, Traversable f) => (XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest) -> Event t (Performable m (f (XhrRequest b))) -> m (Event t (f a))
performRequestsAsync' :: forall (m :: * -> *) t (f :: * -> *) b a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 Traversable f) =>
(XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest)
-> Event t (Performable m (f (XhrRequest b))) -> m (Event t (f a))
performRequestsAsync' XhrRequest b -> (a -> JSM ()) -> Performable m XMLHttpRequest
newXhr Event t (Performable m (f (XhrRequest b)))
req = Event t ((f a -> IO ()) -> Performable m ()) -> m (Event t (f a))
forall t (m :: * -> *) a.
(TriggerEvent t m, PerformEvent t m) =>
Event t ((a -> IO ()) -> Performable m ()) -> m (Event t a)
performEventAsync (Event t ((f a -> IO ()) -> Performable m ()) -> m (Event t (f a)))
-> Event t ((f a -> IO ()) -> Performable m ())
-> m (Event t (f a))
forall a b. (a -> b) -> a -> b
$ Event t (Performable m (f (XhrRequest b)))
-> (Performable m (f (XhrRequest b))
    -> (f a -> IO ()) -> Performable m ())
-> Event t ((f a -> IO ()) -> Performable m ())
forall (f :: * -> *) a b. Functor f => f a -> (a -> b) -> f b
ffor Event t (Performable m (f (XhrRequest b)))
req ((Performable m (f (XhrRequest b))
  -> (f a -> IO ()) -> Performable m ())
 -> Event t ((f a -> IO ()) -> Performable m ()))
-> (Performable m (f (XhrRequest b))
    -> (f a -> IO ()) -> Performable m ())
-> Event t ((f a -> IO ()) -> Performable m ())
forall a b. (a -> b) -> a -> b
$ \Performable m (f (XhrRequest b))
hrs f a -> IO ()
cb -> do
  rs <- Performable m (f (XhrRequest b))
hrs
  resps <- forM rs $ \XhrRequest b
r -> do
    resp <- IO (MVar a) -> Performable m (MVar a)
forall a. IO a -> Performable m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO IO (MVar a)
forall a. IO (MVar a)
newEmptyMVar
    _ <- newXhr r $ liftIO . putMVar resp
    return resp
  _ <- liftIO $ forkIO $ cb =<< forM resps takeMVar
  return ()

-- | Simplified interface to "GET" URLs and return decoded results.
getAndDecode :: (MonadIO m, MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m, FromJSON a) => Event t Text -> m (Event t (Maybe a))
getAndDecode :: forall (m :: * -> *) t a.
(MonadIO m, MonadJSM (Performable m), PerformEvent t m,
 TriggerEvent t m, FromJSON a) =>
Event t Text -> m (Event t (Maybe a))
getAndDecode Event t Text
url = do
  r <- Event t (XhrRequest ()) -> m (Event t XhrResponse)
forall (m :: * -> *) t a.
(MonadJSM (Performable m), PerformEvent t m, TriggerEvent t m,
 IsXhrPayload a) =>
Event t (XhrRequest a) -> m (Event t XhrResponse)
performRequestAsync (Event t (XhrRequest ()) -> m (Event t XhrResponse))
-> Event t (XhrRequest ()) -> m (Event t XhrResponse)
forall a b. (a -> b) -> a -> b
$ (Text -> XhrRequest ()) -> Event t Text -> Event t (XhrRequest ())
forall a b. (a -> b) -> Event t a -> Event t b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (\Text
x -> Text -> Text -> XhrRequestConfig () -> XhrRequest ()
forall a. Text -> Text -> XhrRequestConfig a -> XhrRequest a
XhrRequest Text
"GET" Text
x XhrRequestConfig ()
forall a. Default a => a
def) Event t Text
url
  return $ fmap decodeXhrResponse r

-- | Create a "POST" request from an URL and thing with a JSON representation
postJson :: (ToJSON a) => Text -> a -> XhrRequest Text
postJson :: forall a. ToJSON a => Text -> a -> XhrRequest Text
postJson Text
url a
a =
  Text -> Text -> XhrRequestConfig Text -> XhrRequest Text
forall a. Text -> Text -> XhrRequestConfig a -> XhrRequest a
XhrRequest Text
"POST" Text
url (XhrRequestConfig Text -> XhrRequest Text)
-> XhrRequestConfig Text -> XhrRequest Text
forall a b. (a -> b) -> a -> b
$ XhrRequestConfig ()
forall a. Default a => a
def { _xhrRequestConfig_headers = headerUrlEnc
                              , _xhrRequestConfig_sendData = body
                              }
  where headerUrlEnc :: Map Text Text
headerUrlEnc = Index (Map Text Text)
"Content-type" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map Text Text)
"application/json"
        body :: Text
body = LazyText -> Text
LT.toStrict (LazyText -> Text) -> LazyText -> Text
forall a b. (a -> b) -> a -> b
$ Builder -> LazyText
B.toLazyText (Builder -> LazyText) -> Builder -> LazyText
forall a b. (a -> b) -> a -> b
$ Value -> Builder
forall a. ToJSON a => a -> Builder
encodeToTextBuilder (Value -> Builder) -> Value -> Builder
forall a b. (a -> b) -> a -> b
$ a -> Value
forall a. ToJSON a => a -> Value
toJSON a
a

getMay :: (Monad m, Reflex t) => (Event t a -> m (Event t b)) -> Event t (Maybe a) -> m (Event t (Maybe b))
getMay :: forall (m :: * -> *) t a b.
(Monad m, Reflex t) =>
(Event t a -> m (Event t b))
-> Event t (Maybe a) -> m (Event t (Maybe b))
getMay Event t a -> m (Event t b)
f Event t (Maybe a)
e = do
    e' <- Event t a -> m (Event t b)
f ((Maybe a -> Maybe a) -> Event t (Maybe a) -> Event t a
forall (f :: * -> *) a b.
Filterable f =>
(a -> Maybe b) -> f a -> f b
fmapMaybe Maybe a -> Maybe a
forall a. a -> a
id Event t (Maybe a)
e)
    return $ leftmost [fmap Just e', fmapMaybe (maybe (Just Nothing) (const Nothing)) e]

decodeText :: FromJSON a => Text -> Maybe a
decodeText :: forall a. FromJSON a => Text -> Maybe a
decodeText = ByteString -> Maybe a
forall a. FromJSON a => ByteString -> Maybe a
decode (ByteString -> Maybe a) -> (Text -> ByteString) -> Text -> Maybe a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. StrictByteString -> ByteString
BL.fromStrict (StrictByteString -> ByteString)
-> (Text -> StrictByteString) -> Text -> ByteString
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Text -> StrictByteString
encodeUtf8

-- | Convenience function to decode JSON-encoded responses.
decodeXhrResponse :: FromJSON a => XhrResponse -> Maybe a
decodeXhrResponse :: forall a. FromJSON a => XhrResponse -> Maybe a
decodeXhrResponse = Text -> Maybe a
forall a. FromJSON a => Text -> Maybe a
decodeText (Text -> Maybe a)
-> (XhrResponse -> Maybe Text) -> XhrResponse -> Maybe a
forall (m :: * -> *) b c a.
Monad m =>
(b -> m c) -> (a -> m b) -> a -> m c
<=< XhrResponse -> Maybe Text
_xhrResponse_responseText

#ifdef USE_TEMPLATE_HASKELL
concat <$> mapM makeLenses
  [ ''XhrRequest
  , ''XhrRequestConfig
  , ''XhrResponse
  ]
#else

xhrRequest_method :: Lens' (XhrRequest a) Text
xhrRequest_method f (XhrRequest x1 x2 x3) = (\y -> XhrRequest y x2 x3) <$> f x1
{-# INLINE xhrRequest_method #-}

xhrRequest_url :: Lens' (XhrRequest a) Text
xhrRequest_url f (XhrRequest x1 x2 x3) = (\y -> XhrRequest x1 y x3) <$> f x2
{-# INLINE xhrRequest_url #-}

xhrRequest_config :: Lens' (XhrRequest a) (XhrRequestConfig a)
xhrRequest_config f (XhrRequest x1 x2 x3) = (\y -> XhrRequest x1 x2 y) <$> f x3
{-# INLINE xhrRequest_config #-}

xhrRequestConfig_headers :: Lens' (XhrRequestConfig a) (Map Text Text)
xhrRequestConfig_headers f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig y x2 x3 x4 x5 x6 x7) <$> f x1
{-# INLINE xhrRequestConfig_headers #-}

xhrRequestConfig_user :: Lens' (XhrRequestConfig a) (Maybe Text)
xhrRequestConfig_user f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 y x3 x4 x5 x6 x7) <$> f x2
{-# INLINE xhrRequestConfig_user #-}

xhrRequestConfig_password :: Lens' (XhrRequestConfig a) (Maybe Text)
xhrRequestConfig_password f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 x2 y x4 x5 x6 x7) <$> f x3
{-# INLINE xhrRequestConfig_password #-}

xhrRequestConfig_responseType :: Lens' (XhrRequestConfig a) (Maybe XhrResponseType)
xhrRequestConfig_responseType f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 x2 x3 y x5 x6 x7) <$> f x4
{-# INLINE xhrRequestConfig_responseType #-}

xhrRequestConfig_sendData :: Lens (XhrRequestConfig a) (XhrRequestConfig b) a b
xhrRequestConfig_sendData f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 x2 x3 x4 y x6 x7) <$> f x5
{-# INLINE xhrRequestConfig_sendData #-}

xhrRequestConfig_withCredentials :: Lens' (XhrRequestConfig a) Bool
xhrRequestConfig_withCredentials f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 x2 x3 x4 x5 y x7) <$> f x6
{-# INLINE xhrRequestConfig_withCredentials #-}

xhrRequestConfig_responseHeaders :: Lens' (XhrRequestConfig a) XhrResponseHeaders
xhrRequestConfig_responseHeaders f (XhrRequestConfig x1 x2 x3 x4 x5 x6 x7) = (\y -> XhrRequestConfig x1 x2 x3 x4 x5 x6 y) <$> f x7
{-# INLINE xhrRequestConfig_responseHeaders #-}

xhrResponse_status :: Lens' XhrResponse Word
xhrResponse_status f (XhrResponse x1 x2 x3 x4 x5) = (\y -> XhrResponse y x2 x3 x4 x5) <$> f x1
{-# INLINE xhrResponse_status #-}

xhrResponse_statusText :: Lens' XhrResponse Text
xhrResponse_statusText f (XhrResponse x1 x2 x3 x4 x5) = (\y -> XhrResponse x1 y x3 x4 x5) <$> f x2
{-# INLINE xhrResponse_statusText #-}

xhrResponse_response :: Lens' XhrResponse (Maybe XhrResponseBody)
xhrResponse_response f (XhrResponse x1 x2 x3 x4 x5) = (\y -> XhrResponse x1 x2 y x4 x5) <$> f x3
{-# INLINE xhrResponse_response #-}

xhrResponse_responseText :: Lens' XhrResponse (Maybe Text)
xhrResponse_responseText f (XhrResponse x1 x2 x3 x4 x5) = (\y -> XhrResponse x1 x2 x3 y x5) <$> f x4
{-# INLINE xhrResponse_responseText #-}

xhrResponse_headers :: Lens' XhrResponse (Map (CI Text) Text)
xhrResponse_headers f (XhrResponse x1 x2 x3 x4 x5) = (\y -> XhrResponse x1 x2 x3 x4 y) <$> f x5
{-# INLINE xhrResponse_headers #-}

#endif