141 lines
3.0 KiB
Go
141 lines
3.0 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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// Copyright Authors of K9s
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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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Base
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table *metav1beta1.Table
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header Header
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ageIndex int
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}
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func (*Generic) IsGeneric() 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(ns string, t *metav1beta1.Table) {
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g.table = t
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g.header = g.Header(ns)
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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.header != nil {
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return g.header
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}
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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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if !client.IsClusterScoped(ns) {
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h = append(h, HeaderColumn{Name: "NAMESPACE"})
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}
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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, name, 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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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, name)
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r.Fields = make(Fields, 0, len(g.Header(ns)))
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if !client.IsClusterScoped(ns) {
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r.Fields = append(r.Fields, nns)
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}
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var duration 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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duration = c
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continue
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}
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if c == nil {
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r.Fields = append(r.Fields, Blank)
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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 d, ok := duration.(string); ok {
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r.Fields = append(r.Fields, d)
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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, string, error) {
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var obj map[string]interface{}
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var ns, name string
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err := json.Unmarshal(raw, &obj)
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if err != nil {
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return ns, name, 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 ns, name, errors.New("no metadata found on generic resource")
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}
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ina, ok := meta["name"]
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if !ok {
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return ns, name, errors.New("unable to extract resource name")
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}
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name, ok = ina.(string)
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if !ok {
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return ns, name, fmt.Errorf("expecting name string type but got %T", ns)
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}
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ins, ok := meta["namespace"]
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if !ok {
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return client.ClusterScope, name, nil
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}
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ns, ok = ins.(string)
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if !ok {
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return ns, name, fmt.Errorf("expecting namespace string type but got %T", ns)
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}
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return ns, name, nil
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}
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