优化用户管理

src/lib/user-cache.ts

@@ -55,6 +55,51 @@ class UserInfoCache {
   }
 }
 
+// 站长存在状态缓存
+class OwnerExistenceCache {
+  private cache: Map<string, { exists: boolean; cachedAt: number }> = new Map();
+  private readonly TTL = 10 * 60 * 1000; // 10分钟过期
+
+  get(ownerUsername: string): boolean | null {
+    const cached = this.cache.get(ownerUsername);
+    if (!cached) return null;
+
+    // 检查是否过期
+    if (Date.now() - cached.cachedAt > this.TTL) {
+      this.cache.delete(ownerUsername);
+      return null;
+    }
+
+    return cached.exists;
+  }
+
+  set(ownerUsername: string, exists: boolean): void {
+    this.cache.set(ownerUsername, {
+      exists,
+      cachedAt: Date.now(),
+    });
+  }
+
+  delete(ownerUsername: string): void {
+    this.cache.delete(ownerUsername);
+  }
+
+  clear(): void {
+    this.cache.clear();
+  }
+
+  // 清理过期的缓存
+  cleanup(): void {
+    const now = Date.now();
+    const entries = Array.from(this.cache.entries());
+    for (const [username, cached] of entries) {
+      if (now - cached.cachedAt > this.TTL) {
+        this.cache.delete(username);
+      }
+    }
+  }
+}
+
 // 全局单例
 const globalKey = Symbol.for('__MOONTV_USER_INFO_CACHE__');
 let userInfoCache: UserInfoCache | undefined = (global as any)[globalKey];
@@ -69,4 +114,17 @@ if (!userInfoCache) {
   }, 60 * 1000);
 }
 
-export { userInfoCache };
+const ownerExistenceGlobalKey = Symbol.for('__MOONTV_OWNER_EXISTENCE_CACHE__');
+let ownerExistenceCache: OwnerExistenceCache | undefined = (global as any)[ownerExistenceGlobalKey];
+
+if (!ownerExistenceCache) {
+  ownerExistenceCache = new OwnerExistenceCache();
+  (global as any)[ownerExistenceGlobalKey] = ownerExistenceCache;
+
+  // 每分钟清理一次过期缓存
+  setInterval(() => {
+    ownerExistenceCache?.cleanup();
+  }, 60 * 1000);
+}
+
+export { userInfoCache, ownerExistenceCache };