119 lines
2.5 KiB
Go
119 lines
2.5 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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"github.com/derailed/k9s/internal/client"
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metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
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)
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const ageTableCol = "Age"
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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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ageIndex int
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}
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// Happy returns true if resoure is happy, false otherwise
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func (Generic) Happy(ns string, r Row) bool {
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return true
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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) Header {
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if g.table == nil {
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return Header{}
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}
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h := make(Header, 0, len(g.table.ColumnDefinitions))
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for i, c := range g.table.ColumnDefinitions {
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if c.Name == ageTableCol {
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g.ageIndex = i
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continue
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}
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h = append(h, HeaderColumn{Name: strings.ToUpper(c.Name)})
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}
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if g.ageIndex > 0 {
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h = append(h, HeaderColumn{Name: "AGE", Time: true,})
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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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nns, err := resourceNS(row.Object.Raw)
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if err != nil {
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return err
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}
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n, ok := row.Cells[0].(string)
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if !ok {
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return fmt.Errorf("expecting row 0 to be a string but got %T", row.Cells[0])
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}
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r.ID = client.FQN(nns, n)
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r.Fields = make(Fields, 0, len(g.Header(ns)))
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if client.IsAllNamespaces(ns) && nns != "" {
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r.Fields = append(r.Fields, nns)
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}
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var ageCell interface{}
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for i, c := range row.Cells {
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if g.ageIndex > 0 && i == g.ageIndex {
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ageCell = c
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continue
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}
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r.Fields = append(r.Fields, fmt.Sprintf("%v", c))
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}
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if ageCell != nil {
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r.Fields = append(r.Fields, fmt.Sprintf("%v", ageCell))
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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 resourceNS(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"]
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if !ok {
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return client.ClusterScope, nil
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}
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nns, ok := ns.(string)
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if !ok {
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return "", fmt.Errorf("expecting namespace string type but got %T", ns)
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}
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return nns, nil
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}
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