From f886dc2f03a75b12749ad029134b70c346aea194 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Tue, 23 May 2023 22:52:01 +0100
Subject: Deadly blocks kill the player

Implemented "auto-checkpoints" based on where the player lands after a
jump.
---
 src/Game/Entities.hs | 35 +++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

(limited to 'src/Game/Entities.hs')

diff --git a/src/Game/Entities.hs b/src/Game/Entities.hs
index bea6e33..5e1af65 100644
--- a/src/Game/Entities.hs
+++ b/src/Game/Entities.hs
@@ -38,7 +38,7 @@ import qualified SDL
 mkEntities :: S.SpriteSheet -> M.Map -> IORef C.Controls -> IO Entities
 mkEntities sprites m controls = do
   player <- case find M.isPlayer (M.objects m) of
-    Just (M.PlayerEntity x y) -> mkPlayer sprites x y controls (M.isBlocked m)
+    Just (M.PlayerEntity x y) -> mkPlayer sprites x y controls (M.isBlocked m) (M.isBlockedDeadly m)
     _ -> error "No player entity in map"
   playerRef <- newIORef player
   entities <- traverse (toEntity playerRef) $ sort $ filter (not . M.isPlayer) (M.objects m)
@@ -97,18 +97,11 @@ updateAll es state = do
         ActionAddBattery x y ->
           processActions s {GS.batteries = s.batteries + 1, GS.lastBattery = (x, y)} ents t
         ActionHitPlayer -> do
-          let (s', ents') =
-                if s.lives == 1
-                  then
-                    ( s {GS.lives = 0, GS.gameOverDelay = gameOverDelay},
-                      -- the player is not in the action, changing then type disables collision detection
-                      (head ents) {typ = TypeEffect, set = dyingSet, gravity = gravityUp, frame = 0} : tail ents
-                    )
-                  else
-                    ( s {GS.lives = s.lives - 1, GS.hitDelay = hitDelay},
-                      ents
-                    )
+          let (s', ents') = processPlayerHitAction s ents
           processActions s' ents' t
+        ActionHitPlayerDeadly -> do
+          let (s', ents') = processPlayerHitAction s ents
+          processActions s' (playerToCheckpoint s'.lives (head ents') : tail ents') t
         ActionExitStarted ->
           processActions
             s {GS.playState = GS.ExitStarted}
@@ -122,6 +115,24 @@ updateAll es state = do
           processActions s (ents ++ [blast]) t
     processActions s ents [] = pure (s, ents)
 
+    playerToCheckpoint :: Int -> Entity -> Entity
+    playerToCheckpoint lives p
+      | lives == 0 = p
+      | otherwise = p {x = p.dat.checkx, y = p.dat.checky}
+
+    processPlayerHitAction :: GS.State -> [Entity] -> (GS.State, [Entity])
+    processPlayerHitAction s ents =
+      if s.lives == 1
+        then
+          ( s {GS.lives = 0, GS.gameOverDelay = gameOverDelay, GS.hitDelay = 0},
+            -- the player is not in the action, changing then type disables collision detection
+            (head ents) {typ = TypeEffect, set = dyingSet, gravity = gravityUp, frame = 0} : tail ents
+          )
+        else
+          ( s {GS.lives = s.lives - 1, GS.hitDelay = hitDelay},
+            ents
+          )
+
     -- Update entities skipping enemies if the player was hit
     updateFilter :: Bool -> Entity -> IO Entity
     updateFilter False e = e.update e
-- 
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