signin+userlevelsystem

Change-Id: I4d2b2660b23521817ae2ed6a55c6c322a20385ec
diff --git a/src/main/java/com/example/g8backend/controller/UserController.java b/src/main/java/com/example/g8backend/controller/UserController.java
index 121bc1a..8019967 100644
--- a/src/main/java/com/example/g8backend/controller/UserController.java
+++ b/src/main/java/com/example/g8backend/controller/UserController.java
@@ -8,6 +8,7 @@
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.web.bind.annotation.*;
+import com.example.g8backend.service.ISigningService;
 
 import java.util.List;
 import java.util.Map;
@@ -90,4 +91,14 @@
         Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
         return (Long) authentication.getPrincipal();
     }
+
+    @Autowired
+    private ISigningService signingService; // 修改接口名称
+
+    @PostMapping("/signin")
+    public String signIn() {
+        Long userId = getCurrentUserId(); // 假设从安全上下文中获取用户ID
+        boolean success = signingService.signIn(userId);
+        return success ? "签到成功" : "今日已签到";
+    }
 }