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module SpaceTraders.Utils
( count
, decodeText
, execute
, fromJSONValue
, int2ByteString
, one_
, query
, query_
) where
import Control.Monad.Reader
import Data.Aeson
import Data.Aeson.Types
import qualified Data.ByteString as B
import qualified Data.ByteString.Builder as B
import qualified Data.ByteString.Internal as B
import Data.Maybe
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Database.SQLite.Simple as S
import SpaceTraders
count :: (HasDatabaseConn env, MonadFail m, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m Int
count q t = do
env <- ask
[[ret]] <- liftIO (S.query (getConn env) q t :: IO [[Int]])
return ret
decodeText :: FromJSON a => T.Text -> Maybe a
decodeText = decode . B.toLazyByteString . T.encodeUtf8Builder
execute :: (HasDatabaseConn env, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m ()
execute q t = do
env <- ask
liftIO $ S.execute (getConn env) q t
fromJSONValue :: FromJSON a => Value -> Either String a
fromJSONValue = parseEither parseJSON
int2ByteString :: Int -> B.ByteString
int2ByteString = B.pack . map B.c2w . show
one_ :: (FromJSON b, HasDatabaseConn env, MonadReader env m, MonadIO m) => S.Query -> m b
one_ q = head <$> query_ q
query :: (FromJSON b, HasDatabaseConn env, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m [b]
query q t = do
env <- ask
ret <- liftIO $ S.query (getConn env) q t
return $ mapMaybe (decodeText . head) ret
query_ :: (FromJSON b, HasDatabaseConn env, MonadReader env m, MonadIO m) => S.Query -> m [b]
query_ q = do
env <- ask
ret <- liftIO $ S.query_ (getConn env) q
return $ mapMaybe (decodeText . head) ret
|
