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authorJoris2017-11-08 23:47:26 +0100
committerJoris2017-11-08 23:47:26 +0100
commit27e11b20b06f2f2dbfb56c0998a63169b4b8abc4 (patch)
tree845f54d7fe876c9a3078036975ba85ec21d224a1 /src/server/Model/Query.hs
parenta3601b5e6f5a3e41fa31752a2c704ccd3632790e (diff)
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Use a better project structure
Diffstat (limited to 'src/server/Model/Query.hs')
-rw-r--r--src/server/Model/Query.hs32
1 files changed, 0 insertions, 32 deletions
diff --git a/src/server/Model/Query.hs b/src/server/Model/Query.hs
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--- a/src/server/Model/Query.hs
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@@ -1,32 +0,0 @@
-module Model.Query
- ( Query(..)
- , run
- ) where
-
-import Data.Functor (Functor)
-import Database.SQLite.Simple (Connection)
-import qualified Database.SQLite.Simple as SQLite
-
-data Query a = Query (Connection -> IO a)
-
-instance Functor Query where
- fmap f (Query call) = Query (fmap f . call)
-
-instance Applicative Query where
- pure x = Query (const $ return x)
- (Query callF) <*> (Query callX) = Query (\conn -> do
- x <- callX conn
- f <- callF conn
- return (f x))
-
-instance Monad Query where
- (Query callX) >>= f = Query (\conn -> do
- x <- callX conn
- case f x of Query callY -> callY conn)
-
-run :: Query a -> IO a
-run (Query call) = do
- conn <- SQLite.open "database"
- result <- call conn
- _ <- SQLite.close conn
- return result