src/Gargantext/Database/Node/Update.hs

   1 {-|
   2 Module      : Gargantext.Database.Node.Update
   3 Description : Update Node in Database (Postgres)
   4 Copyright   : (c) CNRS, 2017-Present
   5 License     : AGPL + CECILL v3
   6 Maintainer  : team@gargantext.org
   7 Stability   : experimental
   8 Portability : POSIX
   9
  10 -}
  11
  12 {-# LANGUAGE NoImplicitPrelude #-}
  13 {-# LANGUAGE OverloadedStrings #-}
  14 {-# LANGUAGE QuasiQuotes       #-}
  15 {-# LANGUAGE RankNTypes        #-}
  16
  17
  18 module Gargantext.Database.Node.Update (Update(..), update) where
  19
  20 import qualified Data.Text as DT
  21 import Database.PostgreSQL.Simple
  22
  23 import Gargantext.Prelude
  24 import Gargantext.Core.Types (Name)
  25 import Gargantext.Database.Utils
  26 import Gargantext.Database.Types.Node (NodeId, ParentId)
  27
  28 -- import Data.ByteString
  29 --rename :: NodeId -> Text -> IO ByteString
  30 --rename nodeId name = formatPGSQuery "UPDATE nodes SET name=? where id=?" (name,nodeId)
  31 ------------------------------------------------------------------------
  32
  33 data Update = Rename NodeId Name
  34             | Move   NodeId ParentId
  35
  36 -- | Update a Node
  37 -- TODO : Field as parameter
  38 -- TODO jsonb values, consider this:
  39 -- https://stackoverflow.com/questions/26703476/how-to-perform-update-operations-on-columns-of-type-jsonb-in-postgres-9-4
  40
  41 unOnly :: Only a -> a
  42 unOnly (Only a) = a
  43
  44 update :: Update -> Cmd err [Int]
  45 update (Rename nId name) = map unOnly <$> runPGSQuery "UPDATE nodes SET name=? where id=? returning id"
  46                                            (DT.take 255 name,nId)
  47 update (Move nId pId)    = map unOnly <$> runPGSQuery "UPDATE nodes SET parent_id= ? where id=? returning id"
  48                                            (pId, nId)
  49
  50