114 lines
3.9 KiB
Haskell
114 lines
3.9 KiB
Haskell
module Main (main) where
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import Control.Exception ( bracket )
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import Data.List.NonEmpty (NonEmpty(..))
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import Data.List.NonEmpty qualified as NonEmpty
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import Data.Map (Map)
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import Data.Map qualified as Map
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import Graphics.Vty
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import System.Environment ( getArgs )
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import System.Directory ( listDirectory )
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import System.FilePath ( (</>), takeBaseName )
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import Model
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import Rendering ( render )
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import Parser (parse)
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data Game = Game {
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gameFlat :: Bool,
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gameMode :: GameMode,
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gameSelect :: Int
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}
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data GameMode
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= MenuMode
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| PlayMode (NonEmpty World)
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getWorldList :: IO (Map String FilePath)
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getWorldList =
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do paths <- listDirectory "levels"
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pure (Map.fromList [(takeBaseName path, "levels" </> path) | path <- paths])
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main :: IO ()
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main =
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do args <- getArgs
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worldList <- getWorldList
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bracket (mkVty =<< userConfig) shutdown \vty ->
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case args of
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x:_ | Just path <- Map.lookup x worldList ->
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do w <- parse <$> readFile path
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loop vty Game {
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gameMode = PlayMode (pure w),
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gameFlat = True,
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gameSelect = Map.findIndex x worldList
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}
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_ ->
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loop vty Game {
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gameMode = MenuMode,
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gameFlat = True,
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gameSelect = 0
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}
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loop :: Vty -> Game -> IO ()
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loop vty game =
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case gameMode game of
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MenuMode ->
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do worldList <- getWorldList
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let (a,b) = Map.splitAt (gameSelect game) worldList
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bnds <- displayBounds (outputIface vty)
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update vty (picForImage (renderMenu bnds a b))
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ev <- nextEvent vty
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case ev of
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EvKey key _modifier ->
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case key of
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KEsc -> pure ()
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KUp | gameSelect game > 0 -> loop vty game{ gameSelect = gameSelect game - 1 }
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KDown | gameSelect game + 1 < Map.size worldList -> loop vty game{ gameSelect = gameSelect game + 1 }
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KEnter | Just (path,_) <- Map.minView b ->
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do world <- parse <$> readFile path
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loop vty game{ gameMode = PlayMode (pure world) }
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_ -> loop vty game
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_ -> loop vty game
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PlayMode worlds ->
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do let world = NonEmpty.head worlds
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update vty (render (gameFlat game) (NonEmpty.head worlds))
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ev <- nextEvent vty
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case ev of
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EvKey key _modifier ->
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case key of
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KUp -> loop vty game{ gameMode = PlayMode (NonEmpty.cons (move world (-1,0)) worlds) }
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KDown -> loop vty game{ gameMode = PlayMode (NonEmpty.cons (move world (1,0) ) worlds) }
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KLeft -> loop vty game{ gameMode = PlayMode (NonEmpty.cons (move world (0,-1)) worlds) }
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KRight -> loop vty game{ gameMode = PlayMode (NonEmpty.cons (move world (0,1) ) worlds) }
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KChar 'm' -> loop vty game { gameMode = MenuMode }
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KChar 'r' -> loop vty game{ gameMode = PlayMode (pure (NonEmpty.last worlds)) }
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KChar 'z'
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| Just worlds' <- NonEmpty.nonEmpty (NonEmpty.tail worlds) ->
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loop vty game{ gameMode = PlayMode worlds' }
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KEsc -> pure ()
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KChar 'f' -> loop vty game{ gameFlat = not (gameFlat game) }
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_ -> loop vty game
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_ -> loop vty game
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renderMenu :: DisplayRegion -> Map String a -> Map String a -> Image
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renderMenu (w,h) before after =
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pad ((w - imageWidth menu) `div` 2) 0 0 0 menu
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where
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menu =
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case Map.minViewWithKey after of
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Nothing -> string defAttr "empty menu"
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Just ((k,_),after') ->
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let len1 = (h-1)`div`2 in
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pad 0 (len1 - Map.size before) 0 0 (vertCat
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[ string defAttr x
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| x <- drop (Map.size before - len1) (Map.keys before)
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]) <->
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string (defAttr `withBackColor` cyan `withForeColor` white) k
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<->
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vertCat
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[ string defAttr x
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| x <- drop (Map.size after' - h`div`2) (Map.keys after')
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]
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