Refactoring the backend

backend/src/core/ApiResponse.ts

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+export class ApiResponse<T> {
+  success: boolean;
+  data?: T;
+  message?: string;
+  code: number;
+
+  private constructor(success: boolean, code: number, data?: T, message?: string) {
+    this.success = success;
+    this.code = code;
+    this.data = data;
+    this.message = message;
+  }
+
+  static success<T>(data?: T, message = "操作成功"): ApiResponse<T> {
+    return new ApiResponse(true, 200, data, message);
+  }
+
+  static error(message: string, code = 500): ApiResponse<null> {
+    return new ApiResponse(false, code, null, message);
+  }
+}

backend/src/core/ServiceRegistry.ts

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+export class ServiceRegistry {
+  private static instance: ServiceRegistry;
+  private services: Map<string, any> = new Map();
+
+  static getInstance(): ServiceRegistry {
+    if (!ServiceRegistry.instance) {
+      ServiceRegistry.instance = new ServiceRegistry();
+    }
+    return ServiceRegistry.instance;
+  }
+
+  register(name: string, service: any): void {
+    this.services.set(name, service);
+  }
+
+  get<T>(name: string): T {
+    return this.services.get(name);
+  }
+}

backend/src/core/container.ts

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+import { Container } from "inversify";
+import { TYPES } from "./types";
+import { Cloud115Service } from "../services/Cloud115Service";
+import { QuarkService } from "../services/QuarkService";
+import { Searcher } from "../services/Searcher";
+import { DatabaseService } from "../services/DatabaseService";
+
+const container = new Container();
+
+// 注册服务
+container.bind<Cloud115Service>(TYPES.Cloud115Service).to(Cloud115Service);
+container.bind<QuarkService>(TYPES.QuarkService).to(QuarkService);
+container.bind<Searcher>(TYPES.Searcher).to(Searcher);
+container.bind<DatabaseService>(TYPES.DatabaseService).to(DatabaseService);
+
+export { container };

backend/src/core/types.ts

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+export const TYPES = {
+  DatabaseService: Symbol.for("DatabaseService"),
+  Cloud115Service: Symbol.for("Cloud115Service"),
+  QuarkService: Symbol.for("QuarkService"),
+  Searcher: Symbol.for("Searcher"),
+  DoubanService: Symbol.for("DoubanService"),
+  ImageService: Symbol.for("ImageService"),
+  SettingService: Symbol.for("SettingService"),
+  UserService: Symbol.for("UserService"),
+
+  Cloud115Controller: Symbol.for("Cloud115Controller"),
+  QuarkController: Symbol.for("QuarkController"),
+  ResourceController: Symbol.for("ResourceController"),
+  DoubanController: Symbol.for("DoubanController"),
+  ImageController: Symbol.for("ImageController"),
+  SettingController: Symbol.for("SettingController"),
+  UserController: Symbol.for("UserController"),
+};