251123:2300 Update T1

backend/src/common/services/request-context.service.ts

@@ -0,0 +1,35 @@
+// File: src/common/services/request-context.service.ts
+// บันทึกการแก้ไข: เก็บ Context ระหว่าง Request (User, TraceID) (T1.1)
+
+import { Injectable, Scope } from '@nestjs/common';
+import { AsyncLocalStorage } from 'async_hooks';
+
+@Injectable({ scope: Scope.DEFAULT })
+export class RequestContextService {
+  private static readonly cls = new AsyncLocalStorage<Map<string, any>>();
+
+  static run(fn: () => void) {
+    this.cls.run(new Map(), fn);
+  }
+
+  static set(key: string, value: any) {
+    const store = this.cls.getStore();
+    if (store) {
+      store.set(key, value);
+    }
+  }
+
+  static get<T>(key: string): T | undefined {
+    const store = this.cls.getStore();
+    return store?.get(key);
+  }
+
+  // Helper methods
+  static get currentUserId(): number | null {
+    return this.get('user_id') || null;
+  }
+
+  static get requestId(): string | null {
+    return this.get('request_id') || null;
+  }
+}