052bc8455a
Add a drop command, bound to 'd', which prompts the character for an item in their inventory, removes it from the inventory, and places it on the ground. Along the way I had to fix a bug in the `EntityMap.atPosition` lens, which was always appending to the existing entities at the position on set, without removing the entities that were already there - the rabbit hole of quickchecking the lens laws here also lead to replacing the target of this lens with a newtype called `VectorBag`, which ignores order (since the entitymap makes no guarantees about order of entities at a given position).
62 lines
2 KiB
Haskell
62 lines
2 KiB
Haskell
{-# LANGUAGE ViewPatterns #-}
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module Xanthous.Command where
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import Xanthous.Prelude hiding (Left, Right, Down)
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import Graphics.Vty.Input (Key(..), Modifier(..))
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import Xanthous.Data (Direction(..))
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data Command
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= Quit
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| Move Direction
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| PreviousMessage
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| PickUp
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| Drop
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| Open
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| Wait
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| Eat
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| Look
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| Save
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| Read
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| ShowInventory
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| Wield
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-- | TODO replace with `:` commands
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| ToggleRevealAll
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commandFromKey :: Key -> [Modifier] -> Maybe Command
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commandFromKey (KChar 'q') [] = Just Quit
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commandFromKey (KChar '.') [] = Just Wait
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commandFromKey (KChar (directionFromChar -> Just dir)) [] = Just $ Move dir
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commandFromKey (KChar 'p') [MCtrl] = Just PreviousMessage
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commandFromKey (KChar ',') [] = Just PickUp
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commandFromKey (KChar 'd') [] = Just Drop
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commandFromKey (KChar 'o') [] = Just Open
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commandFromKey (KChar ';') [] = Just Look
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commandFromKey (KChar 'e') [] = Just Eat
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commandFromKey (KChar 'S') [] = Just Save
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commandFromKey (KChar 'r') [] = Just Read
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commandFromKey (KChar 'i') [] = Just ShowInventory
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commandFromKey (KChar 'w') [] = Just Wield
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-- DEBUG COMMANDS --
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commandFromKey (KChar 'r') [MMeta] = Just ToggleRevealAll
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commandFromKey _ _ = Nothing
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directionFromChar :: Char -> Maybe Direction
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directionFromChar 'h' = Just Left
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directionFromChar 'j' = Just Down
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directionFromChar 'k' = Just Up
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directionFromChar 'l' = Just Right
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directionFromChar 'y' = Just UpLeft
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directionFromChar 'u' = Just UpRight
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directionFromChar 'b' = Just DownLeft
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directionFromChar 'n' = Just DownRight
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directionFromChar '.' = Just Here
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directionFromChar _ = Nothing
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