refactor: mass refactoring

src/utils/command.ts

@@ -0,0 +1,10 @@
+export type Command = {
+    name: string;
+    flags: Record<string, true>;
+    options: Record<string, string>;
+    params: string[];
+}
+
+// TODO implement this
+export function parseCommand(input: string): Command { 
+}

src/utils/entity.ts

@@ -0,0 +1,46 @@
+import {Signal, signal} from "@preact/signals-core";
+
+export type Entity = {
+  id: string;
+};
+
+export type EntityAccessor<T extends Entity> = {
+  id: string;
+  value: T;
+}
+
+export function createEntityCollection<T extends Entity>() {
+  const collection = signal({} as Record<string, Signal<T>>);
+  const remove = (...ids: string[]) => {
+    collection.value = Object.fromEntries(
+      Object.entries(collection.value).filter(([id]) => !ids.includes(id)),
+    );
+  };
+  
+  const add = (...entities: T[]) => {
+    collection.value = {
+      ...collection.value,
+      ...Object.fromEntries(entities.map((entity) => [entity.id, signal(entity)])),
+    };
+  };
+  
+  const get = (id: string) => {
+    return {
+      id,
+      get value(){
+        return collection.value[id]?.value;
+      },
+      set value(value: T){
+        const signal = collection.value[id];
+        if(signal)signal.value = value;
+      }
+    }
+  }
+  
+  return {
+    collection,
+    remove,
+    add,
+    get
+  }
+}

src/utils/rng.ts

@@ -0,0 +1,12 @@
+export interface RNG {
+    /** 设置随机数种子 */
+    (seed: number): void;
+    
+    /** 获取一个[0,1)随机数 */
+    next(max?: number):  number;
+    
+    /** 获取一个[0,max)随机整数 */
+    nextInt(max: number): number;
+}
+
+// TODO: create a RNG implementation with the alea library