100 lines
2.0 KiB
Go
100 lines
2.0 KiB
Go
package render
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import (
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"encoding/json"
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"errors"
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"fmt"
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"strings"
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metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
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)
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// Generic renders a generic resource to screen.
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type Generic struct {
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table *metav1beta1.Table
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}
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// SetTable sets the tabular resource.
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func (g *Generic) SetTable(t *metav1beta1.Table) {
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g.table = t
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}
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// ColorerFunc colors a resource row.
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func (Generic) ColorerFunc() ColorerFunc {
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return DefaultColorer
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}
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// Header returns a header row.
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func (g *Generic) Header(ns string) HeaderRow {
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if g.table == nil {
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return HeaderRow{}
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}
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h := make(HeaderRow, 0, len(g.table.ColumnDefinitions))
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if ns == "" {
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h = append(h, Header{Name: "NAMESPACE"})
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}
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for _, c := range g.table.ColumnDefinitions {
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h = append(h, Header{Name: strings.ToUpper(c.Name)})
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}
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return h
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}
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// Render renders a K8s resource to screen.
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func (g *Generic) Render(o interface{}, ns string, r *Row) error {
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row, ok := o.(*metav1beta1.TableRow)
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if !ok {
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return fmt.Errorf("expecting a TableRow but got %T", o)
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}
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count := len(row.Cells)
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if ns == AllNamespaces {
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count++
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}
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r.ID, ok = row.Cells[0].(string)
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if !ok {
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return fmt.Errorf("expecting row id to be a string but got %#v", row.Cells[0])
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}
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r.Fields = make(Fields, count)
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var index int
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if ns == AllNamespaces {
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rns, err := extractNamespace(row.Object.Raw)
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if err != nil {
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return err
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}
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r.Fields[index] = rns
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r.ID = FQN(rns, r.ID)
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index++
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}
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for _, c := range row.Cells {
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r.Fields[index] = fmt.Sprintf("%v", c)
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index++
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}
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return nil
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}
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// ----------------------------------------------------------------------------
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// Helpers...
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func extractNamespace(raw []byte) (string, error) {
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var obj map[string]interface{}
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err := json.Unmarshal(raw, &obj)
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if err != nil {
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return "", err
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}
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meta, ok := obj["metadata"].(map[string]interface{})
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if !ok {
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return "", errors.New("no metadata found on generic resource")
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}
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ns, ok := meta["namespace"].(string)
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if !ok {
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return "", errors.New("invalid namespace found on generic metadata")
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}
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return ns, nil
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}
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