/
generic.go
144 lines (126 loc) 路 3.19 KB
/
generic.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of K9s
package render
import (
"encoding/json"
"errors"
"fmt"
"strings"
"github.com/derailed/k9s/internal/client"
"github.com/derailed/k9s/internal/model1"
"github.com/rs/zerolog/log"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const ageTableCol = "Age"
// Generic renders a generic resource to screen.
type Generic struct {
Base
table *metav1.Table
header model1.Header
ageIndex int
}
func (*Generic) IsGeneric() bool {
return true
}
// SetTable sets the tabular resource.
func (g *Generic) SetTable(ns string, t *metav1.Table) {
g.table = t
g.header = g.Header(ns)
}
// ColorerFunc colors a resource row.
func (*Generic) ColorerFunc() model1.ColorerFunc {
return model1.DefaultColorer
}
// Header returns a header row.
func (g *Generic) Header(ns string) model1.Header {
if g.header != nil {
return g.header
}
if g.table == nil {
return model1.Header{}
}
h := make(model1.Header, 0, len(g.table.ColumnDefinitions))
if !client.IsClusterScoped(ns) {
h = append(h, model1.HeaderColumn{Name: "NAMESPACE"})
}
for i, c := range g.table.ColumnDefinitions {
if c.Name == ageTableCol {
g.ageIndex = i
continue
}
h = append(h, model1.HeaderColumn{Name: strings.ToUpper(c.Name)})
}
if g.ageIndex > 0 {
h = append(h, model1.HeaderColumn{Name: "AGE", Time: true})
}
return h
}
// Render renders a K8s resource to screen.
func (g *Generic) Render(o interface{}, ns string, r *model1.Row) error {
row, ok := o.(metav1.TableRow)
if !ok {
return fmt.Errorf("expecting a TableRow but got %T", o)
}
nns, name, err := resourceNS(row.Object.Raw)
if err != nil {
return err
}
if !ok {
return fmt.Errorf("expecting row 0 to be a string but got %T", row.Cells[0])
}
r.ID = client.FQN(nns, name)
r.Fields = make(model1.Fields, 0, len(g.Header(ns)))
if !client.IsClusterScoped(ns) {
r.Fields = append(r.Fields, nns)
}
var duration interface{}
for i, c := range row.Cells {
if g.ageIndex > 0 && i == g.ageIndex {
duration = c
continue
}
if c == nil {
r.Fields = append(r.Fields, Blank)
continue
}
r.Fields = append(r.Fields, fmt.Sprintf("%v", c))
}
if d, ok := duration.(string); ok {
r.Fields = append(r.Fields, d)
} else if g.ageIndex > 0 {
log.Warn().Msgf("No Duration detected on age field")
r.Fields = append(r.Fields, NAValue)
}
return nil
}
// ----------------------------------------------------------------------------
// Helpers...
func resourceNS(raw []byte) (string, string, error) {
var obj map[string]interface{}
var ns, name string
err := json.Unmarshal(raw, &obj)
if err != nil {
return ns, name, err
}
meta, ok := obj["metadata"].(map[string]interface{})
if !ok {
return ns, name, errors.New("no metadata found on generic resource")
}
ina, ok := meta["name"]
if !ok {
return ns, name, errors.New("unable to extract resource name")
}
name, ok = ina.(string)
if !ok {
return ns, name, fmt.Errorf("expecting name string type but got %T", ns)
}
ins, ok := meta["namespace"]
if !ok {
return client.ClusterScope, name, nil
}
ns, ok = ins.(string)
if !ok {
return ns, name, fmt.Errorf("expecting namespace string type but got %T", ns)
}
return ns, name, nil
}