{-# LANGUAGE BangPatterns      #-}
{-# LANGUAGE FlexibleContexts  #-}
{-# LANGUAGE FlexibleInstances #-}

module HaskellWorks.Data.Json.Internal.Index where

import Control.Arrow
import Control.Monad
import HaskellWorks.Data.Bits.BitWise
import HaskellWorks.Data.Drop
import HaskellWorks.Data.Json.DecodeError
import HaskellWorks.Data.Json.Internal.CharLike
import HaskellWorks.Data.Json.Standard.Cursor.Generic
import HaskellWorks.Data.Positioning
import HaskellWorks.Data.RankSelect.Base.Rank0
import HaskellWorks.Data.RankSelect.Base.Rank1
import HaskellWorks.Data.RankSelect.Base.Select1
import HaskellWorks.Data.TreeCursor
import HaskellWorks.Data.Uncons
import Prelude                                        hiding (drop)

import qualified Data.ByteString                  as BS
import qualified Data.List                        as L
import qualified HaskellWorks.Data.BalancedParens as BP

data JsonIndex
  = JsonIndexString BS.ByteString
  | JsonIndexNumber BS.ByteString
  | JsonIndexObject [(BS.ByteString, JsonIndex)]
  | JsonIndexArray [JsonIndex]
  | JsonIndexBool Bool
  | JsonIndexNull
  deriving (JsonIndex -> JsonIndex -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: JsonIndex -> JsonIndex -> Bool
$c/= :: JsonIndex -> JsonIndex -> Bool
== :: JsonIndex -> JsonIndex -> Bool
$c== :: JsonIndex -> JsonIndex -> Bool
Eq, Int -> JsonIndex -> ShowS
[JsonIndex] -> ShowS
JsonIndex -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [JsonIndex] -> ShowS
$cshowList :: [JsonIndex] -> ShowS
show :: JsonIndex -> String
$cshow :: JsonIndex -> String
showsPrec :: Int -> JsonIndex -> ShowS
$cshowsPrec :: Int -> JsonIndex -> ShowS
Show)

class JsonIndexAt a where
  jsonIndexAt :: a -> Either DecodeError JsonIndex

instance (BP.BalancedParens w, Rank0 w, Rank1 w, Select1 v, TestBit w) => JsonIndexAt (GenericCursor BS.ByteString v w) where
  jsonIndexAt :: GenericCursor ByteString v w -> Either DecodeError JsonIndex
jsonIndexAt GenericCursor ByteString v w
k = case forall v. Uncons v => v -> Maybe (Elem v, v)
uncons ByteString
remainder of
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isLeadingDigit2 Elem ByteString
c -> forall a b. b -> Either a b
Right (ByteString -> JsonIndex
JsonIndexNumber  ByteString
remainder)
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isQuotDbl Elem ByteString
c       -> forall a b. b -> Either a b
Right (ByteString -> JsonIndex
JsonIndexString  ByteString
remainder)
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isChar_t Elem ByteString
c        -> forall a b. b -> Either a b
Right (Bool -> JsonIndex
JsonIndexBool    Bool
True)
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isChar_f Elem ByteString
c        -> forall a b. b -> Either a b
Right (Bool -> JsonIndex
JsonIndexBool    Bool
False)
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isChar_n Elem ByteString
c        -> forall a b. b -> Either a b
Right  JsonIndex
JsonIndexNull
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isBraceLeft Elem ByteString
c     -> [(ByteString, JsonIndex)] -> JsonIndex
JsonIndexObject forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {a}.
(JsonIndexAt a, TreeCursor a) =>
Maybe a -> Either DecodeError [(ByteString, JsonIndex)]
mapValuesFrom   (forall k. TreeCursor k => k -> Maybe k
firstChild GenericCursor ByteString v w
k)
    Just (!Elem ByteString
c, ByteString
_) | forall c. JsonCharLike c => c -> Bool
isBracketLeft Elem ByteString
c   -> [JsonIndex] -> JsonIndex
JsonIndexArray  forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {a}.
(JsonIndexAt a, TreeCursor a) =>
Maybe a -> Either DecodeError [JsonIndex]
arrayValuesFrom (forall k. TreeCursor k => k -> Maybe k
firstChild GenericCursor ByteString v w
k)
    Just (Elem ByteString, ByteString)
_                           -> forall a b. a -> Either a b
Left (String -> DecodeError
DecodeError String
"Invalid Json Type")
    Maybe (Elem ByteString, ByteString)
Nothing                          -> forall a b. a -> Either a b
Left (String -> DecodeError
DecodeError String
"End of data"      )
    where ik :: v
ik                = forall t v w. GenericCursor t v w -> v
interests GenericCursor ByteString v w
k
          bpk :: w
bpk               = forall t v w. GenericCursor t v w -> w
balancedParens GenericCursor ByteString v w
k
          p :: Position
p                 = Count -> Position
lastPositionOf (forall v. Select1 v => v -> Count -> Count
select1 v
ik (forall v. Rank1 v => v -> Count -> Count
rank1 w
bpk (forall t v w. GenericCursor t v w -> Count
cursorRank GenericCursor ByteString v w
k)))
          remainder :: ByteString
remainder         = forall v. Drop v => Count -> v -> v
drop (forall a. ToCount a => a -> Count
toCount Position
p) (forall t v w. GenericCursor t v w -> t
cursorText GenericCursor ByteString v w
k)
          arrayValuesFrom :: Maybe a -> Either DecodeError [JsonIndex]
arrayValuesFrom Maybe a
j = forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence (forall b a. (b -> Maybe (a, b)) -> b -> [a]
L.unfoldr (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (forall a. JsonIndexAt a => a -> Either DecodeError JsonIndex
jsonIndexAt forall (a :: * -> * -> *) b c c'.
Arrow a =>
a b c -> a b c' -> a b (c, c')
&&& forall k. TreeCursor k => k -> Maybe k
nextSibling)) Maybe a
j)
          mapValuesFrom :: Maybe a -> Either DecodeError [(ByteString, JsonIndex)]
mapValuesFrom Maybe a
j   = (forall {b}. [b] -> [(b, b)]
pairwise forall (m :: * -> *) a b c.
Monad m =>
(a -> m b) -> (b -> m c) -> a -> m c
>=> forall {b}. (JsonIndex, b) -> [(ByteString, b)]
asField) forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {a}.
(JsonIndexAt a, TreeCursor a) =>
Maybe a -> Either DecodeError [JsonIndex]
arrayValuesFrom Maybe a
j
          pairwise :: [b] -> [(b, b)]
pairwise (b
a:b
b:[b]
rs) = (b
a, b
b) forall a. a -> [a] -> [a]
: [b] -> [(b, b)]
pairwise [b]
rs
          pairwise [b]
_        = []
          asField :: (JsonIndex, b) -> [(ByteString, b)]
asField (JsonIndex
a, b
b)    = case JsonIndex
a of
                                JsonIndexString ByteString
s -> [(ByteString
s, b
b)]
                                JsonIndex
_                 -> []