53 lines
1.6 KiB
Haskell
53 lines
1.6 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE DeriveFunctor #-}
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module FeedMonad where
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import Data.Text (Text)
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import Middleware (Middleware)
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import Numeric.Natural (Natural)
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import Data.Category (Category)
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import Data.Acid (openLocalState, AcidState (closeAcidState))
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import Control.Exception (bracket)
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import Database (emptyFeedMonadState)
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import Network.HTTP.Client.TLS (newTlsManager)
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import Control.Monad.App (runApp)
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import Data.Environment
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import Control.Monad.Trans (liftIO)
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import Data.URL (URL)
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import Data.Foldable (for_)
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import Control.Monad.HTTP (fetch, execute)
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import Text.Feed.Import (parseFeedSource)
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newtype Minutes = Minutes Natural
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data FeedMonad = FeedMonad
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{ feeds :: [Category URL]
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-- ^ The forest of urls for the feeds. It's a forest because of the categories
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, filters :: Middleware
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-- ^ The middleware. Modifies the scoring, tags and content
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, refreshTime :: Minutes
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-- ^ How often to refresh the feeds
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, secretToken :: Text
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-- ^ Used for authenticating the UI. This is a single user app
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-- served over http, so we can get around with hardcoded
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-- authentication token
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}
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defaultConfig :: FeedMonad
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defaultConfig = FeedMonad
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{ feeds = []
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, filters = id
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, refreshTime = Minutes 30
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, secretToken = "i am a secret"
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}
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defaultMain :: FeedMonad -> IO ()
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defaultMain f =
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bracket (openLocalState emptyFeedMonadState) closeAcidState $ \st -> do
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mgr <- newTlsManager
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runApp (Environment mgr st) $
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for_ (feeds f) $ \c -> for_ c $ \url -> do
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feed <- parseFeedSource <$> liftIO (execute mgr (fetch url))
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liftIO $ print feed
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