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69 lines
1.3 KiB
69 lines
1.3 KiB
package ordercalc
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import (
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"math/rand"
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"strconv"
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"strings"
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"time"
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)
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/**
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* 订单号规则
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* id后4位（随机4位）+当前时间（10位）
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* 2020/08/10
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*/
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func NewOrderSn(user_id string) string {
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var prefix string
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if user_id != "" {
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if len(user_id) > 4 {
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prefix = user_id[len(user_id)-4:] //截取后4位
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} else {
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prefix = user_id
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}
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} else {
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//随机4位
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str := "123456789"
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bytes := []byte(str)
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result := []byte{}
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := 0; i < 4; i++ {
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result = append(result, bytes[r.Intn(len(bytes))])
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}
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prefix = string(result)
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}
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//拼接
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var build strings.Builder
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build.WriteString(prefix)
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build.WriteString(strconv.FormatInt(time.Now().Unix(), 10)) //当前时间
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return build.String()
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}
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/**
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* 核销码规则
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* 随机2位+当前时间（6位）
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* 2020/08/10
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*/
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func VerifyNumber() string {
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var prefix string
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//随机4位
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str := "123456789"
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bytes := []byte(str)
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result := []byte{}
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := 0; i < 1; i++ {
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result = append(result, bytes[r.Intn(len(bytes))])
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}
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prefix = string(result)
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//拼接
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var build strings.Builder
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build.WriteString(prefix)
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build.WriteString(strconv.FormatInt(time.Now().UnixNano(), 10)[10:17]) //当前时间
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return build.String()
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}
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