From 76d05eb2de39a69e93c2c342073cde2627c9f50c Mon Sep 17 00:00:00 2001
From: Daniel Liu <mr.picklepinosaur@gmail.com>
Date: Sat, 1 May 2021 22:07:47 -0400
Subject: [PATCH] custom tick event

---
 Ekitai.hs | 15 +++------------
 Render.hs | 40 +++++++++++++++++++++++++++-------------
 2 files changed, 30 insertions(+), 25 deletions(-)

diff --git a/Ekitai.hs b/Ekitai.hs
index 9e416e1..af47e02 100644
--- a/Ekitai.hs
+++ b/Ekitai.hs
@@ -2,15 +2,11 @@ import System.Environment
 import System.IO
 
 import qualified Data.Vector as V
-import qualified Brick as B
 
 import Parse
 import Sim
 import Render
 
--- ui :: B.Widget ()
--- ui = B.str "hello" <+> B.str "World"
-
 hGetLines :: Handle -> IO [String]
 hGetLines h = do
     line <- hGetLine h
@@ -21,18 +17,13 @@ hGetLines h = do
         return (line:lines)
 
 main = do
+    -- handle file stuff
     argv <- getArgs
     (opts, fname) <- ekitaiOpts argv
     handle <- openFile fname ReadMode
     contents <- hGetLines handle
     hClose handle
-    -- putStrLn $ show $ stringToSim contents
-    initialState <- buildInitialState $ stringToSim contents
-    endState <- B.defaultMain ekitaiApp initialState
-    -- print endState
+    -- start brick
+    ekitaiMain $ stringToSim contents
     return 0
 
--- main :: IO ()
--- main = do
-    -- return 0
-
diff --git a/Render.hs b/Render.hs
index 036944b..bc4a15a 100644
--- a/Render.hs
+++ b/Render.hs
@@ -1,10 +1,15 @@
-module Render ( buildInitialState, ekitaiApp ) where
+module Render ( ekitaiMain ) where
 
 import Brick.AttrMap
 import Brick.Main
 import Brick.Types
 import Brick.Widgets.Core
-import Graphics.Vty.Input.Events
+import Brick.BChan (newBChan, writeBChan)
+import Graphics.Vty
+
+import Control.Monad (forever, void)
+import Control.Monad.IO.Class (liftIO)
+import Control.Concurrent (threadDelay, forkIO)
 
 import qualified Data.Vector as V
 import Sim
@@ -15,7 +20,10 @@ data EkitaiState = EkitaiState
     { ekitaiStateSim           :: Simulation
     } deriving (Show)
 
-ekitaiApp :: App EkitaiState e ResourceName
+-- custom event
+data Tick = Tick
+
+ekitaiApp :: App EkitaiState Tick ResourceName
 ekitaiApp = App
     { appDraw = drawEkitai
     , appChooseCursor = showFirstCursor
@@ -24,6 +32,18 @@ ekitaiApp = App
     , appAttrMap = const $ attrMap mempty []
     }
 
+ekitaiMain sim = do
+    chan <- newBChan 10
+    -- tick game
+    forkIO $ forever $ do
+        writeBChan chan Tick
+        threadDelay 50000
+    let buildVty = Graphics.Vty.mkVty Graphics.Vty.defaultConfig
+    initialVty <- buildVty
+    initialState <- buildInitialState sim
+    endState <- customMain initialVty buildVty (Just chan) ekitaiApp initialState
+    return 0
+
 buildInitialState :: Simulation -> IO EkitaiState
 buildInitialState sim =
     pure EkitaiState
@@ -31,16 +51,10 @@ buildInitialState sim =
     }
 
 drawEkitai :: EkitaiState -> [Widget ResourceName]
--- drawEkitai state = [ vBox $ drawSim $ ekitaiStateSim state ]
 drawEkitai state = [ vBox [str $ simToString $ ekitaiStateSim state] ]
 
-handleEkitaiEvent :: EkitaiState -> BrickEvent n e -> EventM n (Next EkitaiState)
-handleEkitaiEvent s e =
-    case e of
-        VtyEvent vtye ->
-            case vtye of
-                EvKey (KChar 'q') [] -> halt s
-                EvKey (KChar 's') [] -> continue s { ekitaiStateSim = physStep $ ekitaiStateSim s }
-                _ -> continue s
-        _ -> continue s 
+handleEkitaiEvent :: EkitaiState -> BrickEvent n Tick -> EventM n (Next EkitaiState)
+handleEkitaiEvent s (VtyEvent (EvKey (KChar 'q') [])) = halt s
+handleEkitaiEvent s (AppEvent Tick) = continue s { ekitaiStateSim = physStep $ ekitaiStateSim s }
+handleEkitaiEvent s _ = continue s
 
-- 
2.20.1