chore: 并入 iotlcm-worker-svr 历史到 worker-svr/（原提交 96f0f4e）

worker-svr/internal/repository/renewchange/ids.go

@@ -0,0 +1,54 @@
+package renewchange
+
+import (
+	"crypto/rand"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/gogf/gf/v2/errors/gerror"
+)
+
+const businessNoAlphabet = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
+
+// NextOrderSN returns a production order number before any INSERT is issued.
+func NextOrderSN(now time.Time) (string, error) {
+	suffix, err := randomBusinessNoSuffix(8)
+	if err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("SO%s%s", now.Format("20060102150405"), suffix), nil
+}
+
+func randomBusinessNoSuffix(length int) (string, error) {
+	if length <= 0 {
+		return "", gerror.New("business number suffix length must be greater than zero")
+	}
+	randomBytes := make([]byte, length)
+	if _, err := rand.Read(randomBytes); err != nil {
+		return "", gerror.Wrap(err, "generate business number suffix failed")
+	}
+	buf := make([]byte, length)
+	for i, value := range randomBytes {
+		buf[i] = businessNoAlphabet[int(value)%len(businessNoAlphabet)]
+	}
+	return string(buf), nil
+}
+
+// GenerateOrderSn 形如 "yyyyMMddHHmmssfff"+6位随机后缀
+func GenerateOrderSn(t *time.Time) string {
+	now := time.Now()
+	if t != nil {
+		now = *t
+	}
+	return fmt.Sprintf("%s%06d", now.UTC().Format("20060102150405.000")[0:14], now.Nanosecond()/1000%1000000)
+}
+
+// GenerateSubscriptionNo 形如 "SUB" + yyyyMMddHHmmss + 6位后缀
+func GenerateSubscriptionNo(prefix string) string {
+	now := time.Now()
+	if strings.TrimSpace(prefix) == "" {
+		prefix = "SUB"
+	}
+	return fmt.Sprintf("%s%s%06d", prefix, now.UTC().Format("20060102150405"), now.Nanosecond()/1000%1000000)
+}