Run forever

src/MyLib.hs

@@ -2,20 +2,25 @@
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DerivingVia #-}
+{-# LANGUAGE NumericUnderscores #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TypeOperators #-}
 module MyLib (defaultMain) where
 
+import Control.Concurrent (threadDelay)
 import Control.Exception (bracket)
 import Control.Lens
-import Control.Monad (void)
+import Control.Monad (forever, void)
 import Data.Aeson (FromJSON, ToJSON, Value)
 import qualified Data.Aeson as A
+import Data.Aeson.Lens (_String, key)
+import Data.Bool (bool)
 import Data.Config
 import Data.Deriving.Aeson
 import Data.Foldable (for_)
 import Data.Functor.Contravariant ((>$<))
 import Data.Text (Text)
+import qualified Data.Text.IO as TI
 import qualified Data.Text.Strict.Lens as T
 import qualified Database.SQLite.Simple as SQL
 import GHC.Generics (Generic)
@@ -23,19 +28,21 @@ import qualified Membership
 import Network.AMQP
        ( Channel
        , DeliveryMode(Persistent)
+       , closeConnection
+       , declareExchange
        , exchangeName
        , exchangeType
        , msgBody
        , msgDeliveryMode
+       , newExchange
        , newMsg
-       , publishMsg, openConnection, closeConnection, openChannel, newExchange, declareExchange
+       , openChannel
+       , openConnection
+       , publishMsg
        )
 import Network.Reddit (RedditId(RedditId), publishEntries)
 import Network.Wreq.Session (newSession)
 import Publish (Publish(..))
-import Data.Aeson.Lens (key, _String)
-import Data.Bool (bool)
-import qualified Data.Text.IO as TI
 
 data MessageType = Create | Update
   deriving stock (Show, Eq, Generic)
@@ -86,9 +93,11 @@ defaultMain path = do
       let encoder = amqpPublisher sqlConn chan "reddit_posts"
           recorder = sqlRecorder sqlConn
           publisher = encoder <> (messageIdentifier >$< recorder)
+      forever $ do
         for_ (conf ^. fetchers) $ \fetcher -> do
             print fetcher
             publishEntries (toMessage >$< publisher) sess fetcher
+        threadDelay (15 * 60_000_000)
 
 getPassword :: Password -> IO Text
 getPassword (Password p) = pure p