Add iterative blank controls utility

Author: sam-mfb

src/core/controls/blankControls.ts

@@ -0,0 +1,28 @@
+/**
+ * @fileoverview Utility for creating blank control matrices
+ */
+
+import type { ControlMatrix } from './types'
+
+/**
+ * Creates a blank control matrix with all controls set to false.
+ * Optionally allows specific controls to be overridden.
+ *
+ * @param source - A source control matrix to use as a template
+ * @param overrides - Optional partial control matrix to override specific controls
+ * @returns A complete control matrix with all controls false except overrides
+ */
+export function blankControls(
+  source: ControlMatrix,
+  overrides?: Partial<ControlMatrix>
+): ControlMatrix {
+  const blank = {} as ControlMatrix
+  const keys = Object.keys(source) as (keyof ControlMatrix)[]
+
+  // Set all controls to false
+  for (const key of keys) {
+    blank[key] = overrides?.[key] ?? false
+  }
+
+  return blank
+}

src/core/controls/index.ts

@@ -23,3 +23,5 @@ export {
 export { getControls } from './getControls'
 
 export { mergeControls } from './mergeControls'
+
+export { blankControls } from './blankControls'

src/game/components/GameRenderer.tsx

@@ -2,7 +2,12 @@ import React, { useEffect, useRef, useState } from 'react'
 import type { FrameInfo, KeyInfo, MonochromeBitmap } from '@lib/bitmap'
 import { useAppDispatch, useAppSelector, type RootState } from '../store'
 import { togglePause, showMap, hideMap, pause, unpause } from '../gameSlice'
-import { getControls, mergeControls, type ControlMatrix } from '@core/controls'
+import {
+  getControls,
+  mergeControls,
+  blankControls,
+  type ControlMatrix
+} from '@core/controls'
 import { Map } from './Map'
 import { bitmapToCollisionItem, type CollisionService } from '@/core/collision'
 import { Collision } from '@/core/collision/constants'
@@ -140,20 +145,10 @@ const GameRenderer: React.FC<GameRendererProps> = ({
 
         // If map is showing, use blank controls (all false) to prevent game input
         const controls = showMapState
-          ? {
-              thrust: false,
-              left: false,
-              right: false,
-              fire: false,
-              shield: false,
-              selfDestruct: false,
-              pause: false,
-              quit: false,
-              nextLevel: false,
-              extraLife: false,
+          ? blankControls(mergedControls, {
               // need to still detect the map key
               map: mergedControls.map
-            }
+            })
           : mergedControls
 
         if (controls.map) {