feat: 支持限制活动打卡的总次数

dao/checkin.go

@@ -23,6 +23,17 @@ func (c CheckinDAO) FindUserActivityByDay(userID int, activityID int, day string
 	}
 	return &userActivity
 }
+func (c CheckinDAO) FindUserActivityInHistorySince(userID int, activityID int) *po.UserActivity {
+	var userActivity po.UserActivity
+	err := c.Tx.Take(&userActivity, "user_id=? and activity_id=?", userID, activityID).Error
+	if err == gorm.ErrRecordNotFound {
+		return nil
+	}
+	if err != nil {
+		panic(err)
+	}
+	return &userActivity
+}
 func (c CheckinDAO) CreateCheckin(userID int, activityID int, files string) (*po.UserActivity, error) {
 	if activity := c.FindActivityByID(activityID); activity == nil {
 		return nil, errors.New("activityID不存在")

data/po/checkin.go

@@ -10,6 +10,8 @@ type Activity struct {
 	Name             string `json:"name"`
 	Image            string `json:"image"`
 	Credit           int    `json:"credit"`
+	Visible          int    `json:"visible"`
+	Limit            int    `json:"limit"`
 	TeacherAvailable int    `json:"teacher_available"`
 }
 

service/checkin.go

@@ -25,6 +25,16 @@ func (c CheckinService) Submit(aw *app.Wrapper) app.Result {
 		return aw.Error(err.Error())
 	}
 	today := time.Now().Format("20060102")
+	// 检查是否为限制打卡总次数的活动
+	activity := checkinDAO.FindActivityByID(req.ActivityID)
+	if activity == nil {
+		return aw.Error("活动不存在")
+	} else if activity.Limit > 0 {
+		if checkinDAO.FindUserActivityInHistorySince(uc.UserID, req.ActivityID) != nil {
+			return aw.Error("该打卡活动已经达到限制次数")
+		}
+	}
+	// 检查当天是否已经打卡过
 	if checkinDAO.FindUserActivityByDay(uc.UserID, req.ActivityID, today) != nil {
 		return aw.Error("您今天已参加过该项目，请明天再来")
 	}