import Database.HDBC import Database.HDBC.PostgreSQL import System.IO import Control.Exception import Data.Maybe (fromJust) import qualified Data.Text as T import qualified Data.ByteString.Char8 as B import System.FilePath as FP import Filesystem.Path.CurrentOS import Codec.Picture import Codec.Picture.ScaleDCT import qualified Codec.Picture.Metadata as PM main :: IO () main = do putStrLn "Enter database host" dbHost <- getLine putStrLn "Enter database port" dbPort <- getLine putStrLn "Enter database user" dbUser <- getLine putStrLn "Enter database name" dbName <- getLine putStrLn "Enter database password" dbPasswd <- getPasswd let dbString = "host=" ++ dbHost ++ " port=" ++ dbPort ++ " user=" ++ dbUser ++ " dbname=" ++ dbName ++ " password=" ++ dbPasswd conn <- connectPostgreSQL dbString -- comment next two lines, if eidolon has been run after the update -- _ <- run conn "alter table medium add column preview varchar not null default 'fill_me!'" [] -- _ <- run conn "alter table medium add column preview_width int8 not null default 0" [] stmt1 <- prepare conn "select * from medium" _ <- execute stmt1 [] rows <- fetchAllRowsAL stmt1 -- mapM_ (putStrLn . show) rows tups <- mapM (\entry -> case entry of [("id", theId), _, ("path", SqlByteString path), _, _, _, ("owner", SqlInteger owner), _, _, _, _, ("album", SqlInteger album), _, _] -> do eimg <- readImageWithMetadata (tail $ B.unpack path) case eimg of Left e -> error e Right (orig, meta) -> do let newName = takeBaseName (B.unpack path) ++ "_preview.jpg" newPath = "static" FP. "data" FP. show owner FP. show album FP. newName origPix = convertRGBA8 orig oWidth = fromIntegral $ fromJust $ PM.lookup PM.Width meta :: Int oHeight = fromIntegral $ fromJust $ PM.lookup PM.Height meta :: Int pHeight = 600 pScale = (fromIntegral pHeight :: Double) / (fromIntegral oHeight :: Double) pWidth = floor (fromIntegral oWidth * pScale) pPix = scale (pWidth, pHeight) origPix saveJpgImage 95 newPath $ ImageRGBA8 pPix return [SqlByteString (B.pack $ '/':newPath), SqlInteger (fromIntegral pWidth), theId] _ -> error "malformed entry" ) rows stmt2 <- prepare conn "update medium set preview = ?, preview_width = ? where id = ?" executeMany stmt2 tups commit conn disconnect conn putStrLn "Migration successfull!!" getPasswd :: IO String getPasswd = do putStr "Password: " hFlush stdout pass <- withEcho False getLine putChar '\n' return pass withEcho :: Bool -> IO a -> IO a withEcho echo action = do old <- hGetEcho stdin bracket_ (hSetEcho stdin echo) (hSetEcho stdin old) action