func pickZoneFromTopology()

in pkg/csi_driver/controller.go [363:383]

• 17 lines of code
• 6 McCabe index (conditional complexity)

func pickZoneFromTopology(top *csi.TopologyRequirement) (string, error) {
	reqZones, err := getZonesFromTopology(top.GetRequisite())
	if err != nil {
		return "", fmt.Errorf("could not get zones from requisite topology: %w", err)
	}

	prefZones, err := getZonesFromTopology(top.GetPreferred())
	if err != nil {
		return "", fmt.Errorf("could not get zones from preferred topology: %w", err)
	}

	if len(prefZones) == 0 && len(reqZones) == 0 {
		return "", errors.New("both requisite and preferred topology list empty")
	}

	if len(prefZones) != 0 {
		return prefZones[0], nil
	}

	return reqZones[0], nil
}