refactor(code): Cleaned-up the code base

lib/server/admin_format.go

@@ -0,0 +1,73 @@
+package server
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func parseOptionalInt64(raw string) (*int64, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil, nil
+	}
+	value, err := strconv.ParseInt(raw, 10, 64)
+	if err != nil {
+		return nil, errors.New("must be an integer")
+	}
+	if value < 0 {
+		return nil, errors.New("must be at least 0")
+	}
+	return &value, nil
+}
+
+func parseCSVInt64(raw string) ([]int64, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil, nil
+	}
+	parts := strings.Split(raw, ",")
+	values := make([]int64, 0, len(parts))
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		value, err := strconv.ParseInt(part, 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("allowed expiry durations must be comma-separated seconds")
+		}
+		if value < 0 {
+			return nil, fmt.Errorf("allowed expiry durations must be at least 0")
+		}
+		values = append(values, value)
+	}
+	return values, nil
+}
+
+func optionalInt64Label(value *int64) string {
+	if value == nil {
+		return "-"
+	}
+	return strconv.FormatInt(*value, 10)
+}
+
+func joinInt64s(values []int64) string {
+	if len(values) == 0 {
+		return "-"
+	}
+	parts := make([]string, 0, len(values))
+	for _, value := range values {
+		parts = append(parts, strconv.FormatInt(value, 10))
+	}
+	return strings.Join(parts, ", ")
+}
+
+func formatAdminTime(value time.Time) string {
+	if value.IsZero() {
+		return "-"
+	}
+	return value.Local().Format("2006-01-02 15:04:05")
+}