From 6029210098d4a8f10b4b002ec8aa536087f9fb16 Mon Sep 17 00:00:00 2001
From: Pierre Hubert <pierre.git@communiquons.org>
Date: Mon, 23 Mar 2020 18:04:59 +0100
Subject: [PATCH] Snake can accelerate

---
 levels/2.json |  2 ++
 script.js     | 12 +++++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/levels/2.json b/levels/2.json
index 9a5163e..d3d9089 100644
--- a/levels/2.json
+++ b/levels/2.json
@@ -1,4 +1,6 @@
 {
+    "minDelay": 100,
+    "acceleration": 1,
     "dimensions": [40, 40],
     "delay": 200,
     "walls": [
diff --git a/script.js b/script.js
index 8279979..97ba105 100644
--- a/script.js
+++ b/script.js
@@ -134,12 +134,13 @@ async function startGame(gameID) {
      * I placed this function here to inherit
      * the map, snake, canvas & ctx variables...
      */
-    let interval = setInterval(() => step(), level.delay);
+    let currDelay = level.delay;
+    setTimeout(() => step(), currDelay);
     function step() {
         
         // Check if a game was destroyed
         if(!canvas.isConnected)
-            clearInterval(interval)
+            return;
 
         // Move the snake if required
         if(key) {
@@ -261,13 +262,18 @@ async function startGame(gameID) {
 
             }
         }
+
+        if(level.hasOwnProperty("acceleration"))
+            currDelay -= level.acceleration;
+        if(level.hasOwnProperty("minDelay") && currDelay <= level.minDelay)
+            currDelay = level.minDelay
+        setTimeout(() => step(), currDelay);
     }
 
     /**
      * Call this function once the user loose the game
      */
     function gameOver() {
-        clearInterval(interval);
         alert("Game over !!!");
         location.href = "#";
     }