抽奖 新增获取有效活动（单个）

rc-service/rc-service-other/other-adapter/src/main/java/com/red/circle/other/adapter/app/activity/LotteryActivityRestController.java

@@ -58,6 +58,20 @@ public class LotteryActivityRestController extends BaseController {
     return lotteryActivityRestService.listValidActivities(cmd);
   }
 
+  /**
+   * 获取有效活动（单个）.
+   *
+   * @eo.name 获取有效活动（单个）.
+   * @eo.url /valid-activity
+   * @eo.method get
+   * @eo.request-type formdata
+   */
+  @GetMapping("/valid-activity")
+  public LotteryActivityCO getValidActivity(AppExtCommand cmd) {
+    List<LotteryActivityCO> activities = lotteryActivityRestService.listValidActivities(cmd);
+    return activities.isEmpty() ? null : activities.get(0);
+  }
+
   /**
    * 获取活动详情.
    *