fix: bound and configure tunnel quality probes

go-backend/internal/monitoring/tunnel_quality.go

@@ -0,0 +1,52 @@
+package monitoring
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	ConfigTunnelQualityProbeIntervalSec  = "monitor_tunnel_quality_interval_sec"
+	DefaultTunnelQualityProbeIntervalSec = 1
+	MinTunnelQualityProbeIntervalSec     = 1
+	MaxTunnelQualityProbeIntervalSec     = 3600
+)
+
+func TunnelQualityProbeIntervalSecondsFromConfigMap(cfg map[string]string) int {
+	if cfg == nil {
+		return DefaultTunnelQualityProbeIntervalSec
+	}
+	seconds, err := parseTunnelQualityProbeIntervalSeconds(cfg[ConfigTunnelQualityProbeIntervalSec])
+	if err != nil {
+		return DefaultTunnelQualityProbeIntervalSec
+	}
+	return seconds
+}
+
+func NormalizeTunnelQualityProbeIntervalSeconds(value string) (string, error) {
+	seconds, err := parseTunnelQualityProbeIntervalSeconds(value)
+	if err != nil {
+		return "", err
+	}
+	return strconv.Itoa(seconds), nil
+}
+
+func parseTunnelQualityProbeIntervalSeconds(value string) (int, error) {
+	trimmed := strings.TrimSpace(value)
+	if trimmed == "" {
+		return 0, fmt.Errorf("隧道质量探测间隔不能为空")
+	}
+	seconds, err := strconv.Atoi(trimmed)
+	if err != nil {
+		return 0, fmt.Errorf("隧道质量探测间隔必须是整数")
+	}
+	if seconds < MinTunnelQualityProbeIntervalSec || seconds > MaxTunnelQualityProbeIntervalSec {
+		return 0, fmt.Errorf(
+			"隧道质量探测间隔必须在 %d 到 %d 秒之间",
+			MinTunnelQualityProbeIntervalSec,
+			MaxTunnelQualityProbeIntervalSec,
+		)
+	}
+	return seconds, nil
+}