add sync lock for sub or add user's power

api/service/user_service.go

@@ -0,0 +1,83 @@
+package service
+
+import (
+	"fmt"
+	"geekai/core/types"
+	"geekai/store/model"
+	"gorm.io/gorm"
+	"sync"
+	"time"
+)
+
+type UserService struct {
+	db   *gorm.DB
+	lock sync.Mutex
+}
+
+func NewUserService(db *gorm.DB) *UserService {
+	return &UserService{db: db, lock: sync.Mutex{}}
+}
+
+// IncreasePower 增加用户算力
+func (s *UserService) IncreasePower(userId int, power int, log model.PowerLog) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	tx := s.db.Begin()
+	err := tx.Model(&model.User{}).Where("id", userId).UpdateColumn("power", gorm.Expr("power + ?", power)).Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	var user model.User
+	tx.Where("id", userId).First(&user)
+	err = tx.Create(&model.PowerLog{
+		UserId:    user.Id,
+		Username:  user.Username,
+		Type:      log.Type,
+		Amount:    power,
+		Balance:   user.Power,
+		Mark:      types.PowerAdd,
+		Model:     log.Model,
+		Remark:    log.Remark,
+		CreatedAt: time.Now(),
+	}).Error
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	tx.Commit()
+	return nil
+}
+
+// DecreasePower 减少用户算力
+func (s *UserService) DecreasePower(userId int, power int, log model.PowerLog) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	tx := s.db.Begin()
+	err := tx.Model(&model.User{}).Where("id", userId).UpdateColumn("power", gorm.Expr("power - ?", power)).Error
+	if err != nil {
+		tx.Rollback()
+		return fmt.Errorf("扣减算力失败：%v", err)
+	}
+	var user model.User
+	tx.Where("id", userId).First(&user)
+	err = tx.Create(&model.PowerLog{
+		UserId:    user.Id,
+		Username:  user.Username,
+		Type:      log.Type,
+		Amount:    power,
+		Balance:   user.Power,
+		Mark:      types.PowerSub,
+		Model:     log.Model,
+		Remark:    log.Remark,
+		CreatedAt: time.Now(),
+	}).Error
+	if err != nil {
+		tx.Rollback()
+		return fmt.Errorf("记录算力日志失败：%v", err)
+	}
+	tx.Commit()
+	return nil
+}