From 33b85b7f12798f5762d940ed5c30f775cdd7b751 Mon Sep 17 00:00:00 2001
From: Joris
Date: Sun, 28 Jan 2018 12:13:09 +0100
Subject: WIP

---
 client/src/Util/WaitFor.hs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 client/src/Util/WaitFor.hs

(limited to 'client/src/Util/WaitFor.hs')

diff --git a/client/src/Util/WaitFor.hs b/client/src/Util/WaitFor.hs
new file mode 100644
index 0000000..0175c95
--- /dev/null
+++ b/client/src/Util/WaitFor.hs
@@ -0,0 +1,18 @@
+module Util.WaitFor
+  ( waitFor
+  ) where
+
+import           Data.Time  (NominalDiffTime)
+import           Reflex.Dom (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom as R
+
+waitFor
+  :: forall t m a b. MonadWidget t m
+  => (Event t a -> m (Event t b))
+  -> Event t ()
+  -> Dynamic t a
+  -> m (Event t b, Event t Bool)
+waitFor op start input = do
+  result <- op (R.tagPromptlyDyn input start) >>= R.debounce (0.5 :: NominalDiffTime)
+  let waiting = R.leftmost [ const True <$> start , const False <$> result ]
+  return (result, waiting)
-- 
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