src/Gargantext/Database/Query/Table/Node/Error.hs

   1 {-|
   2 Module      : Gargantext.Database.Types.Error
   3 Description :
   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 {-# OPTIONS_GHC -fno-warn-name-shadowing #-}
  12 {-# OPTIONS_GHC -fno-warn-orphans        #-}
  13
  14 {-# LANGUAGE Arrows                 #-}
  15 {-# LANGUAGE ConstraintKinds        #-}
  16 {-# LANGUAGE FunctionalDependencies #-}
  17 {-# LANGUAGE TemplateHaskell        #-}
  18 {-# LANGUAGE TypeFamilies           #-}
  19
  20 module Gargantext.Database.Query.Table.Node.Error where
  21
  22 import Gargantext.Database.Admin.Types.Node (NodeId)
  23 import Control.Lens (Prism', (#), (^?))
  24 import Control.Monad.Error.Class (MonadError(..))
  25 import Gargantext.Prelude hiding (sum, head)
  26 import Prelude hiding (null, id, map, sum)
  27
  28 ------------------------------------------------------------------------
  29 data NodeError = NoListFound
  30                | NoRootFound
  31                | NoCorpusFound
  32                | NoUserFound
  33                | MkNode
  34                | UserNoParent
  35                | HasParent
  36                | ManyParents
  37                | NegativeId
  38                | NotImplYet
  39                | ManyNodeUsers
  40                | DoesNotExist NodeId
  41
  42 instance Show NodeError
  43   where
  44     show NoListFound   = "No list   found"
  45     show NoRootFound   = "No Root   found"
  46     show NoCorpusFound = "No Corpus found"
  47     show NoUserFound   = "No user   found"
  48
  49     show MkNode        = "Cannot make node"
  50     show NegativeId    = "Node with negative Id"
  51     show UserNoParent  = "Should not have parent"
  52     show HasParent     = "NodeType has parent"
  53     show NotImplYet    = "Not implemented yet"
  54     show ManyParents   = "Too many parents"
  55     show ManyNodeUsers = "Many userNode/user"
  56     show (DoesNotExist n) = "Node does not exist" <> show n
  57
  58 class HasNodeError e where
  59   _NodeError :: Prism' e NodeError
  60
  61 nodeError :: ( MonadError e m
  62              , HasNodeError e)
  63           => NodeError -> m a
  64 nodeError ne = throwError $ _NodeError # ne
  65
  66 catchNodeError :: (MonadError e m, HasNodeError e) => m a -> (NodeError -> m a) -> m a
  67 catchNodeError f g = catchError f (\e -> maybe (throwError e) g (e ^? _NodeError))