feat: enhance configuration management and add error handling

src/validation.ts

@@ -0,0 +1,38 @@
+import { plainToClass } from "class-transformer";
+import { IsBoolean, IsString, validate } from "class-validator";
+
+export class UserStateUpdate {
+  @IsString()
+  userId!: string;
+
+  @IsString()
+  username!: string;
+
+  @IsString()
+  avatar!: string;
+
+  @IsBoolean()
+  speaking!: boolean;
+}
+
+export class AudioMessage {
+  data!: Buffer;
+  userId!: string;
+}
+
+export async function validateUserStateUpdate(
+  data: unknown,
+): Promise<UserStateUpdate | null> {
+  if (typeof data !== "object" || data === null) {
+    return null;
+  }
+
+  const obj = plainToClass(UserStateUpdate, data);
+  const errors = await validate(obj);
+
+  if (errors.length > 0) {
+    return null;
+  }
+
+  return obj;
+}