From 1c8a22d24b14d258a9103f7b83d627359eae0da8 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Tue, 21 Mar 2023 21:02:45 +0000
Subject: Player transition into the stage

---
 data/sprites.json          |  3 ++-
 game.cabal                 |  1 +
 src/Game/Entities.hs       |  6 +++++-
 src/Game/Entities/Entry.hs | 31 +++++++++++++++++++++++++++++++
 src/Game/Entities/Types.hs |  8 +++++++-
 src/Game/State.hs          |  6 +++---
 6 files changed, 49 insertions(+), 6 deletions(-)
 create mode 100644 src/Game/Entities/Entry.hs

diff --git a/data/sprites.json b/data/sprites.json
index 182ef35..4e76eab 100644
--- a/data/sprites.json
+++ b/data/sprites.json
@@ -106,7 +106,8 @@
         "sets": [
             [0, 1, 2, 3, 4, 5, 5,
              6, 7, 8, 9, 10, 10, 10, 10, 10, 10, 10],
-            [11, 11, 5, 4, 3, 2, 1, 0]
+            [11, 11, 5, 4, 3, 2, 1, 0],
+            [0, 1, 2, 3, 4, 5, 11, 11]
         ]
     }
 }
diff --git a/game.cabal b/game.cabal
index f3955c4..c54bf5c 100644
--- a/game.cabal
+++ b/game.cabal
@@ -26,6 +26,7 @@ library
         Game.Entities.Const
         Game.Entities.Common
         Game.Entities.Player
+        Game.Entities.Entry
         Game.Entities.Exit
         Game.Entities.Effect
         Game.Entities.Pickup
diff --git a/src/Game/Entities.hs b/src/Game/Entities.hs
index 8a939f4..b43ab0e 100644
--- a/src/Game/Entities.hs
+++ b/src/Game/Entities.hs
@@ -19,6 +19,7 @@ import qualified Game.Controller as C
 import Game.Entities.Common
 import Game.Entities.Const
 import Game.Entities.Effect
+import Game.Entities.Entry
 import Game.Entities.Exit
 import Game.Entities.Pickup
 import Game.Entities.Player
@@ -37,8 +38,10 @@ mkEntities sprites m controls = do
     _ -> error "No player entity in map"
   playerRef <- newIORef player
   entities <- traverse (toEntity playerRef) $ sort $ filter (not . M.isPlayer) (M.objects m)
+  -- the effect of the player "warping" into the level
+  entryEffect <- mkEntry sprites player.x player.y
   -- the entities list has always player first
-  pure $ Entities sprites playerRef (player : entities)
+  pure $ Entities sprites playerRef (player : (entryEffect : entities))
   where
     toEntity :: IORef Entity -> M.Object -> IO Entity
     toEntity playerRef (M.SlimeEntity x y) = mkSlime sprites x y (collision playerRef 16) (M.isBlocked m)
@@ -105,6 +108,7 @@ updateAll es state = do
             -- the player is not in the action, changing the type disables collision detection
             ((head ents) {typ = TypeEffect} : tail ents)
             t
+        ActionEntryDone -> processActions s {GS.levelCompleted = GS.ExitOff} ents t
         ActionExitDone -> processActions s {GS.levelCompleted = GS.ExitDone} ents t
     processActions s ents [] = pure (s, ents)
 
diff --git a/src/Game/Entities/Entry.hs b/src/Game/Entities/Entry.hs
new file mode 100644
index 0000000..5c17146
--- /dev/null
+++ b/src/Game/Entities/Entry.hs
@@ -0,0 +1,31 @@
+module Game.Entities.Entry (mkEntry) where
+
+import Game.Entities.Common
+import Game.Entities.Const
+import Game.Entities.Types
+import qualified Game.Sprites as S
+
+mkEntry :: S.SpriteSheet -> Int -> Int -> IO Entity
+mkEntry sprites x y = do
+  s <- S.get sprites "exit"
+  pure
+    Entity
+      { typ = TypePickup,
+        x = x,
+        y = y,
+        delay = frameDelay,
+        frame = 0,
+        jumping = False,
+        gravity = gravityOff,
+        dir = Dying,
+        sprite = s,
+        update = pure . updateEntry,
+        destroy = False,
+        actions = []
+      }
+
+updateEntry :: Entity -> Entity
+updateEntry e
+  | e.delay > 0 = e {delay = e.delay - 1}
+  | e.frame + 1 < frameLimit e = e {delay = frameDelay, frame = e.frame + 1}
+  | otherwise = e {destroy = True, actions = [ActionEntryDone]}
diff --git a/src/Game/Entities/Types.hs b/src/Game/Entities/Types.hs
index 4ece6c5..e8b29b0 100644
--- a/src/Game/Entities/Types.hs
+++ b/src/Game/Entities/Types.hs
@@ -29,7 +29,13 @@ data Entities = Entities
 -- | The effect name must match the sprite name in the spritesheet.
 type EffectName = String
 
-data Action = ActionAddEffect Int Int EffectName | ActionAddBattery Int Int | ActionHitPlayer | ActionExitStarted | ActionExitDone
+data Action
+  = ActionAddEffect Int Int EffectName
+  | ActionAddBattery Int Int
+  | ActionHitPlayer
+  | ActionExitStarted
+  | ActionEntryDone
+  | ActionExitDone
 
 data Entity = Entity
   { typ :: Type,
diff --git a/src/Game/State.hs b/src/Game/State.hs
index 4f46c01..083e6d4 100644
--- a/src/Game/State.hs
+++ b/src/Game/State.hs
@@ -6,7 +6,7 @@ import qualified Game.Map as M
 maxLives :: Int
 maxLives = 4
 
-data ExitState = ExitOff | ExitStarted | ExitDone deriving (Eq)
+data ExitState = ExitOff | ExitEntry | ExitStarted | ExitDone deriving (Eq)
 
 data State = State
   { batteries :: Int,
@@ -33,7 +33,7 @@ initialState m =
       exit = False,
       -- doesn't matter where
       lastBattery = (0, 0),
-      levelCompleted = ExitOff,
+      levelCompleted = ExitEntry,
       currentLevel = 0
     }
 
@@ -47,5 +47,5 @@ levelState s m =
       exit = False,
       -- doesn't matter where
       lastBattery = (0, 0),
-      levelCompleted = ExitOff
+      levelCompleted = ExitEntry
     }
-- 
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