// executes at least one write operation if it is closed.
//
// This can be useful within the context of HTTP. At least
// one write operation must happen to send the HTTP headers
// to the peer.
type WriteOnCloser struct {
	io.Writer
	hasWritten bool
}

func (w *WriteOnCloser) Write(p []byte) (int, error) {
	w.hasWritten = true
	return w.Writer.Write(p)
}

	if !corruptedMultipart {
		var writer io.Writer
		var err error
		if noFilename {
			writer, err = w.CreateFormField("file")
		} else {
			writer, err = w.CreateFormFile("file", "upload.txt")
		}
		if err != nil {
			// return nil, err
			return nil, err
		}
		writer.Write(objData)
		// Close before creating the new request.
		w.Close()
	}

	"encoding/json"
	"fmt"
	"io"
	"text/tabwriter"

	"sigs.k8s.io/yaml"
)

// ConfigWriter is a writer for processing responses from the Ztunnel Admin config_dump endpoint
type ConfigWriter struct {
	Stdout      io.Writer
	ztunnelDump *ZtunnelDump
	FullDump    []byte
}

// Prime loads the config dump into the writer ready for printing
func (c *ConfigWriter) Prime(b []byte) error {
	cd := ZtunnelDump{}

)

// Comparator diffs between a config dump from Istiod and one from Envoy
type Comparator struct {
	envoy, istiod *configdump.Wrapper
	w             io.Writer
	context       int
	location      string
}

// NewComparator is a comparator constructor
func NewComparator(w io.Writer, istiodResponses map[string][]byte, envoyResponse []byte) (*Comparator, error) {
	c := &Comparator{}
	for _, resp := range istiodResponses {

func (c *ConfigWriter) PrintSecretSummary() error {
	if c.ztunnelDump == nil {
		return fmt.Errorf("config writer has not been primed")
	}
	secretDump := c.ztunnelDump.Certificates
	w := new(tabwriter.Writer).Init(c.Stdout, 0, 8, 5, ' ', 0)
	fmt.Fprintln(w, "CERTIFICATE NAME\tTYPE\tSTATUS\tVALID CERT\tSERIAL NUMBER\tNOT AFTER\tNOT BEFORE")

	for _, secret := range secretDump {

}

// Decode reads from readers, reconstructs data if needed and writes the data to the writer.
// A set of preferred drives can be supplied. In that case they will be used and the data reconstructed.
func (e Erasure) Decode(ctx context.Context, writer io.Writer, readers []io.ReaderAt, offset, length, totalLength int64, prefer []bool) (written int64, derr error) {
	if offset < 0 || length < 0 {

		}
	}
	return "unknown"
}

func (c *ConfigWriter) PrintEndpoints(filter EndpointFilter, outputFormat string) error {
	if c.configDump == nil {
		return fmt.Errorf("config writer has not been primed")
	}
	dump, err := c.retrieveSortedEndpointsSlice(filter)
	if err != nil {
		return err
	}
	marshaller := make(proto.MessageSlice, 0, len(dump))
	for _, eds := range dump {

				List(context.Background(), metav1.ListOptions{})
			if err != nil {
				return err
			}
			if len(gws.Items) == 0 {
				fmt.Fprintln(writer, "No waypoints found.")
				return nil
			}
			w := new(tabwriter.Writer).Init(writer, 0, 8, 5, ' ', 0)
			slices.SortFunc(gws.Items, func(i, j gateway.Gateway) int {
				if r := cmp.Compare(i.Namespace, j.Namespace); r != 0 {
					return r
				}

    private static String prettyPrintJson(def acceptanceJson) {
        def stringWriter = new StringWriter()
        new JsonWriter(stringWriter).withCloseable { writer ->
            writer.setIndent("    ")
            new Gson().toJson(acceptanceJson, AcceptedApiChange, writer)
        }
        return stringWriter.toString()
    }

    String getCurrentVersion() {
        return context.getUserData().get("currentVersion")

	"cmp"
	"encoding/json"
	"fmt"
	"strings"

	"sigs.k8s.io/yaml"

	"istio.io/istio/pkg/maps"
	"istio.io/istio/pkg/slices"
)

// PolicyFilter is used to pass filter information into service based config writer print functions
type PolicyFilter struct {
	Namespace string
}

// Verify returns true if the passed workload matches the filter fields
func (wf *PolicyFilter) Verify(pol *ZtunnelPolicy) bool {