eidolon/Migrations/0.0.3-0.0.4/Migration.hs
2015-09-28 01:35:34 +02:00

71 lines
2.6 KiB
Haskell

import Database.HDBC
import Database.HDBC.PostgreSQL
import System.IO
import Control.Exception
import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import System.FilePath as FP
import Filesystem.Path.CurrentOS
import Graphics.ImageMagick.MagickWand
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 <- sequence $ map (\entry ->
case entry of
[("id", theId), _, ("path", SqlByteString path), _, _, _, ("owner", SqlInteger owner), _, _, _, _, ("album", SqlInteger album), _, _] -> do
let newName = takeBaseName (B.unpack path) ++ "_preview.jpg"
let newPath = "static" FP.</> "data" FP.</> show owner FP.</> show album FP.</> newName
pWidth <- withMagickWandGenesis $ do
(_, w) <- magickWand
readImage w (decodeString $ tail $ B.unpack path)
w1 <- getImageWidth w
h1 <- getImageHeight w
let w2 = w1 `div` 2
let h2 = h1 `div` 2
setImageAlphaChannel w deactivateAlphaChannel
setImageFormat w (T.pack "jpeg")
resizeImage w w2 h2 lanczosFilter 1
setImageCompressionQuality w 95
writeImage w (Just (decodeString newPath))
return w2
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