134 lines
3.7 KiB
Haskell
134 lines
3.7 KiB
Haskell
{-# Language ViewPatterns #-}
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module Parser where
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import Model
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import Graphics.Vty.Attributes
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import Data.Array (Array, listArray)
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import Data.Map qualified as Map
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import Data.Set qualified as Set
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import Text.ParserCombinators.ReadP hiding (many)
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import Control.Applicative
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import Control.Monad
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parse :: String -> World
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parse str =
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case readP_to_S ((,) <$> parseHeader <*> many parseBlock <* eof) str of
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[] -> error "world parsing failed"
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(((p,h,w),bs),_):_ ->
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do let m = Map.fromListWith (++) [(k,[v]) | (_,_,kvs) <- bs, (k,v) <- kvs]
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World
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(Map.fromList [
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(n, b { boxLocation = head (m Map.! n)})
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| (n,b,_) <- bs
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])
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p
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(Set.fromList (Map.findWithDefault [] '-' m))
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(head (m Map.! '='))
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h w
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parseHeader :: ReadP (Char,Int,Int)
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parseHeader =
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do "player" <- token
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[p] <- token
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h <- option 81
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do "height" <- token
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integer
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w <- option (81*2)
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do "width" <- token
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integer
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pure (p,h,w)
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integer :: ReadP Int
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integer = readS_to_P reads
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parseBoring :: ReadP Bool
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parseBoring =
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do t <- token
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case t of
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"boring" -> pure True
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"interesting" -> pure False
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_ -> empty
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parseBlock :: ReadP (Char, Box, [(Char, Location)])
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parseBlock =
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do cmd <- token
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case cmd of
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"block" ->
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do [name] <- token
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color <- parseColor
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boring <- parseBoring
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skipMany (satisfy (' '==))
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_ <- char '\n'
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xs1 <- parseWalls
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let locs = findLocs name xs1
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let b = Box undefined (Original (walls xs1)) color boring
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pure (name, b, locs)
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"link" ->
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do [name] <- token
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[target] <- token
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color <- parseColor
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_ <- char '\n'
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pure (name, Box undefined (Link target) color True, [])
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"infinity" ->
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do [name] <- token
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[target] <- token
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color <- parseColor
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_ <- char '\n'
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pure (name, Box undefined (Infinity target) color True,[])
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"epsilon" ->
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do [name] <- token
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[target] <- token
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color <- parseColor
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skipMany (satisfy (' '==))
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_ <- char '\n'
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xs1 <- parseWalls
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let locs = findLocs name xs1
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let b = Box undefined (Epsilon target (walls xs1)) color False
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pure (name, b, locs)
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_ -> empty
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parseWalls :: ReadP [String]
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parseWalls =
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do row0 <- munch1 ('\n' /=) <* char '\n'
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rows <- replicateM (length row0 - 1) (munch1 ('\n' /=) <* char '\n')
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pure (row0:rows)
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token :: ReadP String
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token = readS_to_P lex
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parseColor :: ReadP Attr
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parseColor =
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do t <- token
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case t of
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"white" -> pure (withForeColor defAttr white)
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"cyan" -> pure (withForeColor defAttr cyan)
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"blue" -> pure (withForeColor defAttr blue)
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"red" -> pure (withForeColor defAttr red)
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"yellow" -> pure (withForeColor defAttr yellow)
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"magenta" -> pure (withForeColor defAttr magenta)
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"black" -> pure (withForeColor defAttr black)
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"green" -> pure (withForeColor defAttr green)
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_ -> empty
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walls :: [String] -> Array Coord Bool
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walls rows = listArray ((ylo,xlo),(yhi,xhi)) (map ('▓'==) (concat rows))
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where
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width = length (head rows)
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height = length rows
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ylo = - ((height - 1) `div` 2)
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yhi = height `div` 2
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xlo = - ((width - 1) `div` 2)
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xhi = width `div` 2
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mkRange :: Int -> (Int, Int)
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mkRange n = (-(n-1)`div`2, n`div`2)
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findLocs :: Char -> [[Char]] -> [(Char, Location)]
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findLocs name xs =
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[ (c, Location name y x)
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| let (ylo, yhi) = mkRange (length xs)
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, (y, row) <- zip [ylo .. yhi] xs
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, let (xlo,xhi) = mkRange (length row)
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, (x, c ) <- zip [xlo..xhi] row
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]
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