policy_list.go

// Copyright 2020 Talhuang<talhuang1231@gmail.com>. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.

package policy

import (
	"bytes"
	"context"
	"fmt"

	"github.com/fatih/color"
	"github.com/marmotedu/component-base/pkg/json"
	metav1 "github.com/marmotedu/component-base/pkg/meta/v1"
	"github.com/marmotedu/marmotedu-sdk-go/marmotedu/service/iam"
	"github.com/spf13/cobra"

	cmdutil "github.com/skeleton1231/go-iam-ecommerce-microservice/internal/iamctl/cmd/util"
	"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/iamctl/util/templates"
	"github.com/skeleton1231/go-iam-ecommerce-microservice/pkg/cli/genericclioptions"
)

const (
	defaultLimit = 1000
)

// ListOptions is an options struct to support list subcommands.
type ListOptions struct {
	Offset int64
	Limit  int64

	iamclient iam.IamInterface
	genericclioptions.IOStreams
}

var listExample = templates.Examples(`
		# Display all policy resources
		iamctl poicy list

		# Display all policy resources with offset and limit
		iamctl policy list --offset=0 --limit=10`)

// NewListOptions returns an initialized ListOptions instance.
func NewListOptions(ioStreams genericclioptions.IOStreams) *ListOptions {
	return &ListOptions{
		Offset:    0,
		Limit:     defaultLimit,
		IOStreams: ioStreams,
	}
}

// NewCmdList returns new initialized instance of list sub command.
func NewCmdList(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
	o := NewListOptions(ioStreams)

	cmd := &cobra.Command{
		Use:                   "list",
		DisableFlagsInUseLine: true,
		Aliases:               []string{},
		Short:                 "Display all authorization policy resources",
		TraverseChildren:      true,
		Long:                  "Display all authorization policy resources.",
		Example:               listExample,
		Run: func(cmd *cobra.Command, args []string) {
			cmdutil.CheckErr(o.Complete(f, cmd, args))
			cmdutil.CheckErr(o.Validate(cmd, args))
			cmdutil.CheckErr(o.Run(args))
		},
		SuggestFor: []string{},
	}

	cmd.Flags().Int64VarP(&o.Offset, "offset", "o", o.Offset, "Specify the offset of the first row to be returned.")
	cmd.Flags().Int64VarP(&o.Limit, "limit", "l", o.Limit, "Specify the amount records to be returned.")

	return cmd
}

// Complete completes all the required options.
func (o *ListOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
	var err error

	o.iamclient, err = f.IAMClient()
	if err != nil {
		return err
	}

	return nil
}

// Validate makes sure there is no discrepency in command options.
func (o *ListOptions) Validate(cmd *cobra.Command, args []string) error {
	return nil
}

// Run executes a list subcommand using the specified options.
func (o *ListOptions) Run(args []string) error {
	policies, err := o.iamclient.APIV1().Policies().List(context.TODO(), metav1.ListOptions{
		Offset: &o.Offset,
		Limit:  &o.Limit,
	})
	if err != nil {
		return err
	}

	for _, pol := range policies.Items {
		bf := bytes.NewBuffer([]byte{})
		jsonEncoder := json.NewEncoder(bf)
		jsonEncoder.SetEscapeHTML(false)
		if err := jsonEncoder.Encode(pol.Policy); err != nil {
			return err
		}

		fmt.Fprintf(o.Out, "%12s %s\n", color.RedString(pol.Name+":"), bf.String())
	}

	return nil
}