MiFaZhan
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package renewchange
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import (
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"crypto/rand"
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"fmt"
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"strings"
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"time"
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"github.com/gogf/gf/v2/errors/gerror"
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)
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const businessNoAlphabet = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
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// NextOrderSN returns a production order number before any INSERT is issued.
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func NextOrderSN(now time.Time) (string, error) {
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suffix, err := randomBusinessNoSuffix(8)
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("SO%s%s", now.Format("20060102150405"), suffix), nil
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}
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func randomBusinessNoSuffix(length int) (string, error) {
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if length <= 0 {
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return "", gerror.New("business number suffix length must be greater than zero")
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}
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randomBytes := make([]byte, length)
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if _, err := rand.Read(randomBytes); err != nil {
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return "", gerror.Wrap(err, "generate business number suffix failed")
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}
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buf := make([]byte, length)
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for i, value := range randomBytes {
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buf[i] = businessNoAlphabet[int(value)%len(businessNoAlphabet)]
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}
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return string(buf), nil
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}
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// GenerateOrderSn 形如 "yyyyMMddHHmmssfff"+6位随机后缀
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func GenerateOrderSn(t *time.Time) string {
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now := time.Now()
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if t != nil {
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now = *t
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}
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return fmt.Sprintf("%s%06d", now.UTC().Format("20060102150405.000")[0:14], now.Nanosecond()/1000%1000000)
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}
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// GenerateSubscriptionNo 形如 "SUB" + yyyyMMddHHmmss + 6位后缀
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func GenerateSubscriptionNo(prefix string) string {
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now := time.Now()
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if strings.TrimSpace(prefix) == "" {
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prefix = "SUB"
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}
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return fmt.Sprintf("%s%s%06d", prefix, now.UTC().Format("20060102150405"), now.Nanosecond()/1000%1000000)
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}
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