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{-|
Module : Gargantext.Prelude.Utils
Description : Useful Tools near Prelude of the project
Copyright : (c) CNRS, 2017-Present
License : AGPL + CECILL v3
Maintainer : team@gargantext.org
Stability : experimental
Portability : POSIX
-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
module Gargantext.Prelude.Utils
where
import Control.Lens (view)
import Control.Monad.Reader (MonadReader)
import Control.Monad.IO.Class (MonadIO, liftIO)
import Control.Monad.Random.Class (MonadRandom)
import Data.Text (Text)
import Control.Monad.Reader (ask)
import GHC.IO (FilePath)
import Gargantext.Prelude
import Gargantext.API.Settings
import System.Random (newStdGen)
import qualified System.Random.Shuffle as SRS
import System.Directory (createDirectoryIfMissing)
import qualified Data.ByteString.Lazy.Char8 as Char
import qualified Data.Digest.Pure.SHA as SHA (sha256, showDigest)
import qualified Data.Text as Text
import Gargantext.Database.Types.Node (NodeId, NodeType)
import Data.ByteString (ByteString)
import Crypto.Argon2 as Crypto
import Data.Either
import Data.ByteString.Base64.URL as URL
--------------------------------------------------------------------------
shuffle :: MonadRandom m => [a] -> m [a]
shuffle ns = SRS.shuffleM ns
--------------------------------------------------------------------------
sha :: Text -> Text
sha = Text.pack
. SHA.showDigest
. SHA.sha256
. Char.pack
. Text.unpack
--------------------------------------------------------------------------
data NodeToHash = NodeToHash { nodeType :: NodeType
, nodeId :: NodeId
}
secret_key :: ByteString
secret_key = "WRV5ymit8s~ge6%08dLR7Q!gBcpb1MY%7e67db2206"
type SecretKey = ByteString
type FolderPath = FilePath
type FileName = FilePath
hashNode :: SecretKey -> NodeToHash -> ByteString
hashNode sk (NodeToHash nt ni) = case hashResult of
Left e -> panic (cs $ show e)
Right h -> URL.encode h
where
hashResult = Crypto.hash Crypto.defaultHashOptions
sk
(cs $ show nt <> show ni)
toPath :: Int -> Text -> (FolderPath,FileName)
toPath n x = (Text.unpack $ Text.intercalate "/" [x1,x2], Text.unpack xs)
where
(x1,x') = Text.splitAt n x
(x2,xs) = Text.splitAt n x'
class SaveFile a where
saveFile' :: FilePath -> a -> IO ()
class ReadFile a where
readFile' :: FilePath -> IO a
writeFile :: (MonadReader env m, MonadIO m, HasSettings env, SaveFile a)
=> a -> m FilePath
writeFile a = do
dataPath <- view (settings . fileFolder) <$> ask
(fp,fn) <- liftIO $ (toPath 3) . sha . Text.pack . show <$> newStdGen
let foldPath = dataPath <> "/" <> fp
filePath = foldPath <> "/" <> fn
_ <- liftIO $ createDirectoryIfMissing True foldPath
_ <- liftIO $ saveFile' filePath a
pure filePath
readFile :: (MonadReader env m, MonadIO m, HasSettings env, ReadFile a)
=> FilePath -> m a
readFile fp = do
dataPath <- view (settings . fileFolder) <$> ask
liftIO $ readFile' $ dataPath <> "/" <> fp