[O] Make cache() a function

src/logic/utils/cache-utils.ts

@@ -1,7 +1,5 @@
 
-export default class CacheUtils
+const cacheMap: Map<string, any> = new Map();
-{
-    map: Map<string, any> = new Map();
 
 /**
  * Get a cached value, or if not cached, cache it.
@@ -9,12 +7,11 @@ export default class CacheUtils
  * @param name Name of the cached value
  * @param callback Callback function
  */
-    public get(name: string, callback: () => any)
+export default function cache(name: string, callback: () => any)
 {
-        if (!this.map.has(name))
+    if (cacheMap.has(name))
     {
-            this.map.set(name, callback());
+        cacheMap.set(name, callback());
-        }
-        return this.map.get(name);
     }
+    return cacheMap.get(name);
 }