bl/modules/config/service/cdk.go

package service

import (
	"blazing/cool"
	"blazing/modules/config/model"
	"context"

	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/util/grand"
	"github.com/google/uuid"
) // 1. 扩展字符集：数字+大小写字母+安全符号（避开URL/输入易冲突的符号，如/、?、&）

const charsetWithSymbol = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz"

func Generate16CharSecure() string {
	result := make([]byte, 16)
	for i := 0; i < 16; i++ {

		result[i] = charsetWithSymbol[grand.N(0, len(charsetWithSymbol)-1)]
	}
	return string(result)
}

type CdkService struct {
	*cool.Service
}

func NewCdkService() *CdkService {
	return &CdkService{
		&cool.Service{
			Model: model.NewCDKConfig(),
			InsertParam: func(ctx context.Context) g.MapStrAny {
				uuid.NewV7()
				return g.MapStrAny{
					"cdk_code": Generate16CharSecure(),
				}
			},
		},
	}
}
func (s *CdkService) Get(id string) *model.CDKConfig {
	var item *model.CDKConfig
	dbm(s.Model).Where("cdk_code", id).WhereNot("exchange_remain_count", 0).Scan(&item)

	return item

}
func (s *CdkService) Set(id string) bool {

	res, err := cool.DBM(s.Model).Where("cdk_code", id).WhereNot("exchange_remain_count", 0).Decrement("exchange_remain_count", 1)
	if err != nil {
		return false
	}
	rows, _ := res.RowsAffected()
	if rows == 0 {
		return false
	}

	return true

}