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{-# LANGUAGE UndecidableInstances #-}
--------------------------------------------------------------------------------
module Xanthous.App.Prompt
( handlePromptEvent
, clearPrompt
, prompt
, prompt_
, confirm_
, confirm
, menu
, menu_
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude
--------------------------------------------------------------------------------
import Brick (BrickEvent(..), Next)
import Brick.Widgets.Edit (handleEditorEvent)
import Data.Aeson (ToJSON, object)
import Graphics.Vty.Input.Events (Event(EvKey), Key(..))
import GHC.TypeLits (TypeError, ErrorMessage(..))
--------------------------------------------------------------------------------
import Xanthous.App.Common
import Xanthous.Data (move)
import Xanthous.Command (directionFromChar)
import Xanthous.Data.App (ResourceName, AppEvent)
import Xanthous.Game.Prompt
import Xanthous.Game.State
import qualified Xanthous.Messages as Messages
--------------------------------------------------------------------------------
handlePromptEvent
:: Text -- ^ Prompt message
-> Prompt AppM
-> BrickEvent ResourceName AppEvent
-> AppM (Next GameState)
handlePromptEvent _ (Prompt Cancellable _ _ _ _) (VtyEvent (EvKey KEsc []))
= clearPrompt >> continue
handlePromptEvent _ pr (VtyEvent (EvKey KEnter []))
= clearPrompt >> submitPrompt pr >> continue
handlePromptEvent _ pr@(Prompt _ SConfirm _ _ _) (VtyEvent (EvKey (KChar 'y') []))
= clearPrompt >> submitPrompt pr >> continue
handlePromptEvent _ (Prompt _ SConfirm _ _ _) (VtyEvent (EvKey (KChar 'n') []))
= clearPrompt >> continue
handlePromptEvent
msg
(Prompt c SStringPrompt (StringPromptState edit) pri cb)
(VtyEvent ev)
= do
edit' <- lift $ handleEditorEvent ev edit
let prompt' = Prompt c SStringPrompt (StringPromptState edit') pri cb
promptState .= WaitingPrompt msg prompt'
continue
handlePromptEvent _ (Prompt _ SDirectionPrompt _ _ cb)
(VtyEvent (EvKey (KChar (directionFromChar -> Just dir)) []))
= clearPrompt >> cb (DirectionResult dir) >> continue
handlePromptEvent _ (Prompt _ SDirectionPrompt _ _ _) _ = continue
handlePromptEvent _ (Prompt _ SMenu _ items' cb) (VtyEvent (EvKey (KChar chr) []))
| Just (MenuOption _ res) <- items' ^. at chr
= clearPrompt >> cb (MenuResult res) >> continue
| otherwise
= continue
handlePromptEvent
msg
(Prompt c SPointOnMap (PointOnMapPromptState pos) pri cb)
(VtyEvent (EvKey (KChar (directionFromChar -> Just dir)) []))
= let pos' = move dir pos
prompt' = Prompt c SPointOnMap (PointOnMapPromptState pos') pri cb
in promptState .= WaitingPrompt msg prompt'
>> continue
handlePromptEvent _ (Prompt _ SPointOnMap _ _ _) _ = continue
handlePromptEvent
_
(Prompt Cancellable _ _ _ _)
(VtyEvent (EvKey (KChar 'q') []))
= clearPrompt >> continue
handlePromptEvent _ _ _ = continue
clearPrompt :: AppM ()
clearPrompt = promptState .= NoPrompt
class NotMenu (pt :: PromptType)
instance NotMenu 'StringPrompt
instance NotMenu 'Confirm
instance NotMenu 'DirectionPrompt
instance NotMenu 'PointOnMap
instance NotMenu 'Continue
instance TypeError ('Text "Cannot use `prompt` or `prompt_` for menu prompts"
':$$: 'Text "Use `menu` or `menu_` instead")
=> NotMenu ('Menu a)
prompt
:: forall (pt :: PromptType) (params :: Type).
(ToJSON params, SingPromptType pt, NotMenu pt)
=> [Text] -- ^ Message key
-> params -- ^ Message params
-> PromptCancellable
-> (PromptResult pt -> AppM ()) -- ^ Prompt promise handler
-> AppM ()
prompt msgPath params cancellable cb = do
let pt = singPromptType @pt
msg <- Messages.message msgPath params
p <- case pt of
SPointOnMap -> do
charPos <- use characterPosition
pure $ mkPointOnMapPrompt cancellable charPos cb
SStringPrompt -> pure $ mkPrompt cancellable pt cb
SConfirm -> pure $ mkPrompt cancellable pt cb
SDirectionPrompt -> pure $ mkPrompt cancellable pt cb
SContinue -> pure $ mkPrompt cancellable pt cb
SMenu -> error "unreachable"
promptState .= WaitingPrompt msg p
prompt_
:: forall (pt :: PromptType).
(SingPromptType pt, NotMenu pt)
=> [Text] -- ^ Message key
-> PromptCancellable
-> (PromptResult pt -> AppM ()) -- ^ Prompt promise handler
-> AppM ()
prompt_ msg = prompt msg $ object []
confirm
:: ToJSON params
=> [Text] -- ^ Message key
-> params
-> AppM ()
-> AppM ()
confirm msgPath params
= prompt @'Confirm msgPath params Cancellable . const
confirm_ :: [Text] -> AppM () -> AppM ()
confirm_ msgPath = confirm msgPath $ object []
menu :: forall (a :: Type) (params :: Type).
(ToJSON params)
=> [Text] -- ^ Message key
-> params -- ^ Message params
-> PromptCancellable
-> Map Char (MenuOption a) -- ^ Menu items
-> (PromptResult ('Menu a) -> AppM ()) -- ^ Menu promise handler
-> AppM ()
menu msgPath params cancellable items' cb = do
msg <- Messages.message msgPath params
let p = mkMenu cancellable items' cb
promptState .= WaitingPrompt msg p
menu_ :: forall (a :: Type).
[Text] -- ^ Message key
-> PromptCancellable
-> Map Char (MenuOption a) -- ^ Menu items
-> (PromptResult ('Menu a) -> AppM ()) -- ^ Menu promise handler
-> AppM ()
menu_ msgPath = menu msgPath $ object []
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