module BishBosh.Notation.Smith(
Smith(
getQualifiedMove
),
origin,
regexSyntax,
showsCoordinates,
fromQualifiedMove
) where
import Control.Arrow((&&&))
import qualified BishBosh.Attribute.MoveType as Attribute.MoveType
import qualified BishBosh.Attribute.Rank as Attribute.Rank
import qualified BishBosh.Cartesian.Abscissa as Cartesian.Abscissa
import qualified BishBosh.Cartesian.Coordinates as Cartesian.Coordinates
import qualified BishBosh.Cartesian.Ordinate as Cartesian.Ordinate
import qualified BishBosh.Component.Move as Component.Move
import qualified BishBosh.Component.QualifiedMove as Component.QualifiedMove
import qualified Control.Arrow
import qualified Data.Char
import qualified Data.Default
import qualified Data.List.Extra
import qualified Data.Maybe
xOrigin :: Int
xOrigin = Data.Char.ord 'a'
yOrigin :: Int
yOrigin = Data.Char.ord '1'
origin :: (Int, Int)
origin = (xOrigin, yOrigin)
regexSyntax :: String
regexSyntax = showString "([a-h][1-8]){2}[" . showString (
concatMap show Attribute.Rank.range
) . showString "EcC]?[" $ showString (
Data.List.Extra.upper $ map (head . show) Attribute.Rank.promotionProspects
) "]?"
newtype Smith x y = MkSmith {
getQualifiedMove :: Component.QualifiedMove.QualifiedMove x y
} deriving Eq
fromQualifiedMove :: Component.QualifiedMove.QualifiedMove x y -> Smith x y
fromQualifiedMove = MkSmith
encode :: (Enum x, Enum y) => Cartesian.Coordinates.Coordinates x y -> (ShowS, ShowS)
encode = showChar . Data.Char.chr . (+ (xOrigin - Cartesian.Abscissa.xOrigin)) . fromEnum . Cartesian.Coordinates.getX &&& showChar . Data.Char.chr . (+ (yOrigin - Cartesian.Ordinate.yOrigin)) . fromEnum . Cartesian.Coordinates.getY
showsCoordinates :: (Enum x, Enum y) => Cartesian.Coordinates.Coordinates x y -> ShowS
showsCoordinates = uncurry (.) . encode
instance (Enum x, Enum y) => Show (Smith x y) where
showsPrec _ MkSmith { getQualifiedMove = qualifiedMove } = let
(move, moveType) = Component.QualifiedMove.getMove &&& Component.QualifiedMove.getMoveType $ qualifiedMove
in showsCoordinates (
Component.Move.getSource move
) . showsCoordinates (
Component.Move.getDestination move
) . (
case moveType of
Attribute.MoveType.Castle isShort -> showChar $ if isShort
then 'c'
else 'C'
Attribute.MoveType.EnPassant -> showChar 'E'
_ -> Data.Maybe.maybe id shows (
Attribute.MoveType.getMaybeExplicitlyTakenRank moveType
) . Data.Maybe.maybe id (
showString . Data.List.Extra.upper . show
) (
Attribute.Rank.getMaybePromotionRank moveType
)
)
instance (
Enum x,
Enum y,
Ord x,
Ord y
) => Read (Smith x y) where
readsPrec _ s = case Data.List.Extra.trimStart s of
x : y : x' : y' : remainder -> let
fromSmith x'' y'' = Cartesian.Coordinates.mkMaybeCoordinates (
toEnum $ Data.Char.ord x'' + (Cartesian.Abscissa.xOrigin - xOrigin)
) (
toEnum $ Data.Char.ord y'' + (Cartesian.Ordinate.yOrigin - yOrigin)
)
in [
(
fromQualifiedMove $ Component.QualifiedMove.mkQualifiedMove (Component.Move.mkMove source destination) moveType,
remainder'
) |
source <- Data.Maybe.maybeToList $ fromSmith x y,
destination <- Data.Maybe.maybeToList $ fromSmith x' y',
source /= destination,
(moveType, remainder') <- case remainder of
[] -> [(Data.Default.def, remainder)]
'c' : s1 -> [(Attribute.MoveType.shortCastle, s1)]
'C' : s1 -> [(Attribute.MoveType.longCastle, s1)]
'E' : s1 -> [(Attribute.MoveType.enPassant, s1)]
c1 : s1 -> (
\(moveType, remainder') -> Data.Maybe.maybe [] (
return . flip (,) remainder'
) $ uncurry Attribute.MoveType.mkMaybeNormalMoveType moveType
) $ case reads [c1] of
[(rank, "")]
| Data.Char.isUpper c1 -> ((Nothing, Just rank), s1)
| otherwise -> Control.Arrow.first (
(,) $ Just rank
) $ case s1 of
c2 : s2
| Data.Char.isUpper c2 -> case reads [c2] of
[(promotionRank, "")] -> (Just promotionRank, s2)
_ -> (Nothing, s1)
| otherwise -> (Nothing, s1)
[] -> (Nothing, s1)
_ -> ((Nothing, Nothing), remainder)
]
_ -> []
instance Attribute.Rank.Promotable (Smith x y) where
getMaybePromotionRank MkSmith { getQualifiedMove = qualifiedMove } = Attribute.Rank.getMaybePromotionRank $ Component.QualifiedMove.getMoveType qualifiedMove