feat: add view command to view recycled resource objects

Author: poneding

cmd/krb-cli/cmd/view.go

@@ -0,0 +1,109 @@
+/*
+Copyright 2025 The Ketches Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"context"
+	"strings"
+
+	krbclient "github.com/ketches/kube-recycle-bin/internal/client"
+	"github.com/ketches/kube-recycle-bin/internal/completion"
+	"github.com/ketches/kube-recycle-bin/pkg/tlog"
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+type ViewFlags struct {
+	ObjectResource  string
+	ObjectNamespace string
+	OutputFormat    string
+}
+
+var viewFlags ViewFlags
+
+var viewCmd = &cobra.Command{
+	Use:     "view",
+	Aliases: []string{"show", "display"},
+	Short:   "View recyceled resource objects from RecycleItem",
+	Example: `
+# View recycled resource objects from RecycleItem with names foo and bar
+krb-cli view foo bar
+
+# View recycled resource objects from RecycleItem deployments foo and filter by object resource deployments
+krb-cli view --object-resource deployments foo
+
+# View recycled resource objects from RecycleItem deployments foo-deploy, service foo-svc and filter by object namespace dev
+krb-cli view --object-namespace dev foo-deploy foo-svc
+
+# View recycled resource objects from RecycleItem with names foo and bar in JSON format
+krb-cli view foo bar --output json
+`,
+	Args: cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		runView(args)
+	},
+	ValidArgsFunction: completion.RecycleItem,
+}
+
+func init() {
+	rootCmd.AddCommand(viewCmd)
+
+	viewCmd.Flags().StringVarP(&viewFlags.ObjectResource, "object-resource", "", "", "View recycled resource objects filtered by the specified object resource")
+	viewCmd.Flags().StringVarP(&viewFlags.ObjectNamespace, "object-namespace", "", "", "View recycled resource objects filtered by the specified object namespace")
+	viewCmd.Flags().StringVarP(&viewFlags.OutputFormat, "output", "o", "yaml", "Output format. One of: json|yaml, default is yaml")
+
+	viewCmd.RegisterFlagCompletionFunc("object-resource", completion.RecycleItemGroupResource)
+	viewCmd.RegisterFlagCompletionFunc("object-namespace", completion.RecycleItemNamespace)
+	viewCmd.RegisterFlagCompletionFunc("output", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		return []string{"json", "yaml"}, cobra.ShellCompDirectiveNoFileComp
+	})
+}
+
+func runView(args []string) {
+	if len(args) == 0 {
+		tlog.Panicf("✗ please specify recycle items to view.")
+	}
+
+	var objContents []string
+	for _, recycleItemName := range args {
+		recycleItem, err := krbclient.RecycleItem().Get(context.Background(), recycleItemName, client.GetOptions{})
+		if err != nil {
+			tlog.Printf("✗ failed to get RecycleItem [%s]: %v, ignored.", recycleItemName, err)
+			continue
+		}
+
+		switch viewFlags.OutputFormat {
+		case "json":
+			objContent, err := recycleItem.Object.IndentedJSON()
+			if err != nil {
+				tlog.Printf("✗ failed to view recycled resource object [%s: %s] from RecycleItem [%s] in JSON format: %s, error: %v", recycleItem.Object.Kind, recycleItem.Object.Key().String(), recycleItem.Name, recycleItem.Name, err)
+				continue
+			}
+			objContents = append(objContents, objContent)
+			// tlog.Printf("✓ recycled resource object [%s: %s] from RecycleItem [%s]: \n%s \n", recycleItem.Object.Kind, recycleItem.Object.Key().String(), recycleItem.Name, objContent)
+		default:
+			objContent, err := recycleItem.Object.YAML()
+			if err != nil {
+				tlog.Printf("✗ failed to view recycled resource object [%s: %s] from RecycleItem [%s] in YAML format: %s, error: %v", recycleItem.Object.Kind, recycleItem.Object.Key().String(), recycleItem.Name, recycleItem.Name, err)
+				continue
+			}
+			objContents = append(objContents, objContent)
+			// tlog.Printf("✓ recycled resource object [%s: %s] from RecycleItem [%s]: \n%s \n", recycleItem.Object.Kind, recycleItem.Object.Key().String(), recycleItem.Name, objContent)
+		}
+	}
+	tlog.Print(strings.Join(objContents, "\n---\n"))
+}