play wall sound only if player action succeded previously

js/app.js

@@ -5,6 +5,7 @@ let holdQueue = new MinoesTable("holdTable")
 let matrix             = new Matrix()
 let nextQueue          = new NextQueue()
 let playing            = false
+let lastActionSucceded = true
 let favicon
 
 window.onload = function(event) {
@@ -94,6 +95,7 @@ function ticktack() {
 
 function generate(piece) {
     matrix.piece = piece || nextQueue.shift()
+    lastActionSucceded = true
     favicon.href = matrix.piece.favicon_href
 
     if (matrix.piece.canMove(TRANSLATION.NONE)) {
@@ -112,23 +114,15 @@ let playerActions = {
 
     rotateCounterclockwise: () => matrix.piece.rotate(ROTATION.CCW),
 
-    softDrop: function() {
+    softDrop: () => matrix.piece.move(TRANSLATION.DOWN) && ++stats.score,
-        if (matrix.piece.move(TRANSLATION.DOWN)) {
-            stats.score++
-            return true
-        } else {
-            return false
-        }
-    },
 
     hardDrop: function() {
         scheduler.clearTimeout(lockDown)
         playSound(hardDropSound)
         while (matrix.piece.move(TRANSLATION.DOWN, ROTATION.NONE, true)) stats.score +=2
-        // wallSound.currentTime = 0
-        // wallSound.pause()
         matrix.table.classList.add("hard-dropped-table-animation")
         lockDown()
+        return true
     },
 
     hold: function() {
@@ -164,7 +158,12 @@ function onkeydown(event) {
         if (!pressedKeys.has(event.key)) {
             pressedKeys.add(event.key)
             action = settings.keyBind[event.key]
-            action()
+            if (action()) {
+                lastActionSucceded = true
+            } else if (lastActionSucceded) {
+                wallSound.play()
+                lastActionSucceded = false
+            }
             if (REPEATABLE_ACTIONS.includes(action)) {
                 actionsQueue.unshift(action)
                 scheduler.clearTimeout(repeat)
@@ -186,11 +185,15 @@ function repeat() {
 
 function autorepeat() {
     if (actionsQueue.length) {
-        actionsQueue[0]()
+        if (actionsQueue[0]()) {
-    } else {
+            lastActionSucceded = true
-        scheduler.clearInterval(autorepeat)
+        } else if (lastActionSucceded) {
+            wallSound.play()
+            lastActionSucceded = false
         }
     }
+    else scheduler.clearInterval(autorepeat)
+}
 
 function onkeyup(event) {
     if (event.key in settings.keyBind) {

js/game_logic.js

@@ -103,17 +103,32 @@ class Scheduler {
     }
 
     setInterval(func, delay, ...args) {
+        if (this.intervalTasks.has(func)) {
+            console.warn(`$func already in intervalTasks`)
+            return false
+        } else {
             this.intervalTasks.set(func, window.setInterval(func, delay, ...args))
+            return true
+        }
     }
 
     setTimeout(func, delay, ...args) {
+        if (this.timeoutTasks.has(func)) {
+            console.warn(`$func already in timeoutTasks`)
+            return false
+        } else {
             this.timeoutTasks.set(func, window.setTimeout(func, delay, ...args))
+            return true
+        }
     }
 
     clearInterval(func) {
         if (this.intervalTasks.has(func)) {
             window.clearInterval(this.intervalTasks.get(func))
             this.intervalTasks.delete(func)
+            return true
+        } else {
+            return false
         }
     }
 
@@ -121,6 +136,9 @@ class Scheduler {
         if (this.timeoutTasks.has(func)) {
             window.clearTimeout(this.timeoutTasks.get(func))
             this.timeoutTasks.delete(func)
+            return true
+        } else {
+            return false
         }
     }
 }
@@ -332,7 +350,6 @@ class Tetromino {
             matrix.drawPiece()
             return true
         } else if (!hardDropped) {
-            wallSound.play()
             if (translation == TRANSLATION.DOWN) {
                 this.locked = true
                 if (!scheduler.timeoutTasks.has(lockDown))