48 lines
1.2 KiB
Haskell
48 lines
1.2 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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module Dungeon where
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import Data.Aeson
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import Data.Matrix
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import Linear.V2
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import Data.Tuple
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import Data.Maybe
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import Data.Either
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data Cell = Solid
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| Empty
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deriving (Eq)
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instance Show Cell where
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show cell = [fromMaybe '?' (lookup cell cellMapping)]
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cellMapping :: [(Cell, Char)]
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cellMapping =
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[ (Empty, '.')
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, (Solid, '#')
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]
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newtype Dungeon = Dungeon (Matrix Cell)
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instance Show Dungeon where
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show (Dungeon m) = unlines . map (concatMap show) $ toLists m
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instance FromJSON Dungeon where
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parseJSON = withObject "Dungeon" $ \v -> do
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stringMap <- v .: "map"
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let cellMappingR = map swap cellMapping
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charToCell c = fromMaybe (error "Invalid cell in the .map file") (c `lookup` cellMappingR)
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cellLists = map charToCell <$> stringMap
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return . Dungeon . fromLists $ cellLists
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makeDungeonFromFile :: FilePath -> IO Dungeon
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makeDungeonFromFile f = do
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eithDun <- eitherDecodeFileStrict f
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return $ fromRight (error "") eithDun
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dungeonToLists :: Dungeon -> [[Cell]]
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dungeonToLists (Dungeon m) = toLists m
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getCell :: V2 Int -> Dungeon -> Cell
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getCell (V2 x y) (Dungeon m) = fromMaybe Solid (safeGet (y+1) (x+1) m)
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