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path: root/commands/bridge_configure.go
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package commands

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"

	"github.com/spf13/cobra"

	"github.com/MichaelMure/git-bug/bridge"
	"github.com/MichaelMure/git-bug/bridge/core"
	"github.com/MichaelMure/git-bug/bridge/core/auth"
	"github.com/MichaelMure/git-bug/repository"
)

type bridgeConfigureOptions struct {
	name       string
	target     string
	params     core.BridgeParams
	token      string
	tokenStdin bool
}

func newBridgeConfigureCommand() *cobra.Command {
	env := newEnv()
	options := bridgeConfigureOptions{}

	cmd := &cobra.Command{
		Use:   "configure",
		Short: "Configure a new bridge.",
		Long: `	Configure a new bridge by passing flags or/and using interactive terminal prompts. You can avoid all the terminal prompts by passing all the necessary flags to configure your bridge.`,
		Example: `# Interactive example
[1]: github
[2]: gitlab
[3]: jira
[4]: launchpad-preview

target: 1
name [default]: default

Detected projects:
[1]: github.com/a-hilaly/git-bug
[2]: github.com/MichaelMure/git-bug

[0]: Another project

Select option: 1

[1]: user provided token
[2]: interactive token creation
Select option: 1

You can generate a new token by visiting https://github.com/settings/tokens.
Choose 'Generate new token' and set the necessary access scope for your repository.

The access scope depend on the type of repository.
Public:
	- 'public_repo': to be able to read public repositories
Private:
	- 'repo'       : to be able to read private repositories

Enter token: 87cf5c03b64029f18ea5f9ca5679daa08ccbd700
Successfully configured bridge: default

# For GitHub
git bug bridge configure \
    --name=default \
    --target=github \
    --owner=$(OWNER) \
    --project=$(PROJECT) \
    --token=$(TOKEN)

# For Launchpad
git bug bridge configure \
    --name=default \
    --target=launchpad-preview \
	--url=https://bugs.launchpad.net/ubuntu/

# For Gitlab
git bug bridge configure \
    --name=default \
    --target=github \
    --url=https://github.com/michaelmure/git-bug \
    --token=$(TOKEN)`,
		PreRunE:  loadBackend(env),
		PostRunE: closeBackend(env),
		RunE: func(cmd *cobra.Command, args []string) error {
			return runBridgeConfigure(env, options)
		},
	}

	flags := cmd.Flags()
	flags.SortFlags = false

	flags.StringVarP(&options.name, "name", "n", "", "A distinctive name to identify the bridge")
	flags.StringVarP(&options.target, "target", "t", "",
		fmt.Sprintf("The target of the bridge. Valid values are [%s]", strings.Join(bridge.Targets(), ",")))
	flags.StringVarP(&options.params.URL, "url", "u", "", "The URL of the remote repository")
	flags.StringVarP(&options.params.BaseURL, "base-url", "b", "", "The base URL of your remote issue tracker")
	flags.StringVarP(&options.params.Login, "login", "l", "", "The login on your remote issue tracker")
	flags.StringVarP(&options.params.CredPrefix, "credential", "c", "", "The identifier or prefix of an already known credential for your remote issue tracker (see \"git-bug bridge auth\")")
	flags.StringVar(&options.token, "token", "", "A raw authentication token for the remote issue tracker")
	flags.BoolVar(&options.tokenStdin, "token-stdin", false, "Will read the token from stdin and ignore --token")
	flags.StringVarP(&options.params.Owner, "owner", "o", "", "The owner of the remote repository")
	flags.StringVarP(&options.params.Project, "project", "p", "", "The name of the remote repository")

	return cmd
}

func runBridgeConfigure(env *Env, opts bridgeConfigureOptions) error {
	var err error

	if (opts.tokenStdin || opts.token != "" || opts.params.CredPrefix != "") &&
		(opts.name == "" || opts.target == "") {
		return fmt.Errorf("you must provide a bridge name and target to configure a bridge with a credential")
	}

	// early fail
	if opts.params.CredPrefix != "" {
		if _, err := auth.LoadWithPrefix(env.repo, opts.params.CredPrefix); err != nil {
			return err
		}
	}

	switch {
	case opts.tokenStdin:
		reader := bufio.NewReader(os.Stdin)
		token, err := reader.ReadString('\n')
		if err != nil {
			return fmt.Errorf("reading from stdin: %v", err)
		}
		opts.params.TokenRaw = strings.TrimSpace(token)
	case opts.token != "":
		opts.params.TokenRaw = opts.token
	}

	if opts.target == "" {
		opts.target, err = promptTarget()
		if err != nil {
			return err
		}
	}

	if opts.name == "" {
		opts.name, err = promptName(env.repo)
		if err != nil {
			return err
		}
	}

	b, err := bridge.NewBridge(env.backend, opts.target, opts.name)
	if err != nil {
		return err
	}

	err = b.Configure(opts.params)
	if err != nil {
		return err
	}

	env.out.Printf("Successfully configured bridge: %s\n", opts.name)
	return nil
}

func promptTarget() (string, error) {
	// TODO: use the reusable prompt from the input package
	targets := bridge.Targets()

	for {
		for i, target := range targets {
			fmt.Printf("[%d]: %s\n", i+1, target)
		}
		fmt.Printf("target: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')

		if err != nil {
			return "", err
		}

		line = strings.TrimSpace(line)

		index, err := strconv.Atoi(line)
		if err != nil || index <= 0 || index > len(targets) {
			fmt.Println("invalid input")
			continue
		}

		return targets[index-1], nil
	}
}

func promptName(repo repository.RepoConfig) (string, error) {
	// TODO: use the reusable prompt from the input package
	const defaultName = "default"

	defaultExist := core.BridgeExist(repo, defaultName)

	for {
		if defaultExist {
			fmt.Printf("name: ")
		} else {
			fmt.Printf("name [%s]: ", defaultName)
		}

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		line = strings.TrimSpace(line)

		name := line
		if defaultExist && name == "" {
			continue
		}

		if name == "" {
			name = defaultName
		}

		if !core.BridgeExist(repo, name) {
			return name, nil
		}

		fmt.Println("a bridge with the same name already exist")
	}
}