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 DeriveGeneric          #-}
  16 {-# LANGUAGE ConstraintKinds        #-}
  17 {-# LANGUAGE FlexibleContexts       #-}
  18 {-# LANGUAGE FlexibleInstances      #-}
  19 {-# LANGUAGE FunctionalDependencies #-}
  20 {-# LANGUAGE OverloadedStrings      #-}
  21 {-# LANGUAGE MultiParamTypeClasses  #-}
  22 {-# LANGUAGE NoImplicitPrelude      #-}
  23 {-# LANGUAGE RankNTypes             #-}
  24 {-# LANGUAGE TemplateHaskell        #-}
  25 {-# LANGUAGE TypeFamilies           #-}
  26
  27 module Gargantext.Database.Query.Table.Node.Error where
  28
  29 import Control.Lens (Prism', (#), (^?))
  30 import Control.Monad.Error.Class (MonadError(..))
  31 import Gargantext.Prelude hiding (sum, head)
  32 import Prelude hiding (null, id, map, sum)
  33
  34 ------------------------------------------------------------------------
  35 data NodeError = NoListFound
  36                | NoRootFound
  37                | NoCorpusFound
  38                | NoUserFound
  39                | MkNode
  40                | UserNoParent
  41                | HasParent
  42                | ManyParents
  43                | NegativeId
  44                | NotImplYet
  45                | ManyNodeUsers
  46
  47 instance Show NodeError
  48   where
  49     show NoListFound   = "No list   found"
  50     show NoRootFound   = "No Root   found"
  51     show NoCorpusFound = "No Corpus found"
  52     show NoUserFound   = "No user   found"
  53
  54     show MkNode        = "Cannot make node"
  55     show NegativeId    = "Node with negative Id"
  56     show UserNoParent  = "Should not have parent"
  57     show HasParent     = "NodeType has parent"
  58     show NotImplYet    = "Not implemented yet"
  59     show ManyParents   = "Too many parents"
  60     show ManyNodeUsers = "Many userNode/user"
  61
  62 class HasNodeError e where
  63   _NodeError :: Prism' e NodeError
  64
  65 nodeError :: ( MonadError e m
  66              , HasNodeError e)
  67           => NodeError -> m a
  68 nodeError ne = throwError $ _NodeError # ne
  69
  70 catchNodeError :: (MonadError e m, HasNodeError e) => m a -> (NodeError -> m a) -> m a
  71 catchNodeError f g = catchError f (\e -> maybe (throwError e) g (e ^? _NodeError))