cli/command/issue.go

package command

import (
	"errors"
	"fmt"
	"io"
	"net/url"
	"regexp"
	"strconv"
	"strings"
	"time"

	"github.com/cli/cli/api"
	"github.com/cli/cli/git"
	"github.com/cli/cli/internal/ghrepo"
	"github.com/cli/cli/pkg/githubtemplate"
	"github.com/cli/cli/utils"
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

func init() {
	RootCmd.AddCommand(issueCmd)
	issueCmd.AddCommand(issueStatusCmd)
	issueCmd.AddCommand(issueViewCmd)

	issueCmd.AddCommand(issueCreateCmd)
	issueCreateCmd.Flags().StringP("title", "t", "",
		"Supply a title. Will prompt for one otherwise.")
	issueCreateCmd.Flags().StringP("body", "b", "",
		"Supply a body. Will prompt for one otherwise.")
	issueCreateCmd.Flags().BoolP("web", "w", false, "Open the browser to create an issue")

	issueCmd.AddCommand(issueListCmd)
	issueListCmd.Flags().StringP("assignee", "a", "", "Filter by assignee")
	issueListCmd.Flags().StringSliceP("label", "l", nil, "Filter by label")
	issueListCmd.Flags().StringP("state", "s", "", "Filter by state: {open|closed|all}")
	issueListCmd.Flags().IntP("limit", "L", 30, "Maximum number of issues to fetch")

	issueViewCmd.Flags().BoolP("preview", "p", false, "Display preview of issue content")
}

var issueCmd = &cobra.Command{
	Use:   "issue",
	Short: "Create and view issues",
	Long: `Work with GitHub issues.

An issue can be supplied as argument in any of the following formats:
- by number, e.g. "123"; or
- by URL, e.g. "https://github.com/OWNER/REPO/issues/123".`,
}
var issueCreateCmd = &cobra.Command{
	Use:   "create",
	Short: "Create a new issue",
	RunE:  issueCreate,
}
var issueListCmd = &cobra.Command{
	Use:   "list",
	Short: "List and filter issues in this repository",
	RunE:  issueList,
}
var issueStatusCmd = &cobra.Command{
	Use:   "status",
	Short: "Show status of relevant issues",
	RunE:  issueStatus,
}
var issueViewCmd = &cobra.Command{
	Use: "view {<number> | <url> | <branch>}",
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) < 1 {
			return FlagError{errors.New("issue required as argument")}
		}
		return nil
	},
	Short: "View an issue in the browser",
	RunE:  issueView,
}

func issueList(cmd *cobra.Command, args []string) error {
	ctx := contextForCommand(cmd)
	apiClient, err := apiClientForContext(ctx)
	if err != nil {
		return err
	}

	baseRepo, err := determineBaseRepo(cmd, ctx)
	if err != nil {
		return err
	}

	state, err := cmd.Flags().GetString("state")
	if err != nil {
		return err
	}

	labels, err := cmd.Flags().GetStringSlice("label")
	if err != nil {
		return err
	}

	assignee, err := cmd.Flags().GetString("assignee")
	if err != nil {
		return err
	}

	limit, err := cmd.Flags().GetInt("limit")
	if err != nil {
		return err
	}

	fmt.Fprintf(colorableErr(cmd), "\nIssues for %s\n\n", ghrepo.FullName(*baseRepo))

	issues, err := api.IssueList(apiClient, *baseRepo, state, labels, assignee, limit)
	if err != nil {
		return err
	}

	if len(issues) == 0 {
		colorErr := colorableErr(cmd) // Send to stderr because otherwise when piping this command it would seem like the "no open issues" message is actually an issue
		msg := "There are no open issues"

		userSetFlags := false
		cmd.Flags().Visit(func(f *pflag.Flag) {
			userSetFlags = true
		})
		if userSetFlags {
			msg = "No issues match your search"
		}
		printMessage(colorErr, msg)
		return nil
	}

	out := cmd.OutOrStdout()
	table := utils.NewTablePrinter(out)
	for _, issue := range issues {
		issueNum := strconv.Itoa(issue.Number)
		if table.IsTTY() {
			issueNum = "#" + issueNum
		}
		labels := labelList(issue)
		if labels != "" && table.IsTTY() {
			labels = fmt.Sprintf("(%s)", labels)
		}
		table.AddField(issueNum, nil, colorFuncForState(issue.State))
		table.AddField(replaceExcessiveWhitespace(issue.Title), nil, nil)
		table.AddField(labels, nil, utils.Gray)
		table.EndRow()
	}
	table.Render()

	return nil
}

func issueStatus(cmd *cobra.Command, args []string) error {
	ctx := contextForCommand(cmd)
	apiClient, err := apiClientForContext(ctx)
	if err != nil {
		return err
	}

	baseRepo, err := determineBaseRepo(cmd, ctx)
	if err != nil {
		return err
	}

	currentUser, err := ctx.AuthLogin()
	if err != nil {
		return err
	}

	issuePayload, err := api.IssueStatus(apiClient, *baseRepo, currentUser)
	if err != nil {
		return err
	}

	out := colorableOut(cmd)

	fmt.Fprintln(out, "")
	fmt.Fprintf(out, "Relevant issues in %s\n", ghrepo.FullName(*baseRepo))
	fmt.Fprintln(out, "")

	printHeader(out, "Issues assigned to you")
	if issuePayload.Assigned.TotalCount > 0 {
		printIssues(out, "  ", issuePayload.Assigned.TotalCount, issuePayload.Assigned.Issues)
	} else {
		message := fmt.Sprintf("  There are no issues assigned to you")
		printMessage(out, message)
	}
	fmt.Fprintln(out)

	printHeader(out, "Issues mentioning you")
	if issuePayload.Mentioned.TotalCount > 0 {
		printIssues(out, "  ", issuePayload.Mentioned.TotalCount, issuePayload.Mentioned.Issues)
	} else {
		printMessage(out, "  There are no issues mentioning you")
	}
	fmt.Fprintln(out)

	printHeader(out, "Issues opened by you")
	if issuePayload.Authored.TotalCount > 0 {
		printIssues(out, "  ", issuePayload.Authored.TotalCount, issuePayload.Authored.Issues)
	} else {
		printMessage(out, "  There are no issues opened by you")
	}
	fmt.Fprintln(out)

	return nil
}

func issueView(cmd *cobra.Command, args []string) error {
	ctx := contextForCommand(cmd)

	apiClient, err := apiClientForContext(ctx)
	if err != nil {
		return err
	}

	baseRepo, err := determineBaseRepo(cmd, ctx)
	if err != nil {
		return err
	}

	issue, err := issueFromArg(apiClient, *baseRepo, args[0])
	if err != nil {
		return err
	}
	openURL := issue.URL

	preview, err := cmd.Flags().GetBool("preview")
	if err != nil {
		return err
	}

	if preview {
		out := colorableOut(cmd)
		printIssuePreview(out, issue)
		return nil
	} else {
		fmt.Fprintf(cmd.ErrOrStderr(), "Opening %s in your browser.\n", openURL)
		return utils.OpenInBrowser(openURL)
	}

}

func printIssuePreview(out io.Writer, issue *api.Issue) {
	coloredLabels := labelList(*issue)
	if coloredLabels != "" {
		coloredLabels = utils.Gray(fmt.Sprintf("(%s)", coloredLabels))
	}

	fmt.Fprintln(out, utils.Bold(issue.Title))
	fmt.Fprintln(out, utils.Gray(fmt.Sprintf(
		"opened by %s. %s. %s",
		issue.Author.Login,
		utils.Pluralize(issue.Comments.TotalCount, "comment"),
		coloredLabels,
	)))
	if issue.Body != "" {
		fmt.Fprintln(out)
		fmt.Fprintln(out, utils.RenderMarkdown(issue.Body))
		fmt.Fprintln(out)
	}
	fmt.Fprintf(out, utils.Gray("View this issue on GitHub: %s\n"), issue.URL)
}

var issueURLRE = regexp.MustCompile(`^https://github\.com/([^/]+)/([^/]+)/issues/(\d+)`)

func issueFromArg(apiClient *api.Client, baseRepo ghrepo.Interface, arg string) (*api.Issue, error) {
	if issueNumber, err := strconv.Atoi(arg); err == nil {
		return api.IssueByNumber(apiClient, baseRepo, issueNumber)
	}

	if m := issueURLRE.FindStringSubmatch(arg); m != nil {
		issueNumber, _ := strconv.Atoi(m[3])
		return api.IssueByNumber(apiClient, baseRepo, issueNumber)
	}

	return nil, fmt.Errorf("invalid issue format: %q", arg)
}

func issueCreate(cmd *cobra.Command, args []string) error {
	ctx := contextForCommand(cmd)

	// NB no auto forking like over in pr create
	baseRepo, err := determineBaseRepo(cmd, ctx)
	if err != nil {
		return err
	}

	fmt.Fprintf(colorableErr(cmd), "\nCreating issue in %s\n\n", ghrepo.FullName(*baseRepo))

	baseOverride, err := cmd.Flags().GetString("repo")
	if err != nil {
		return err
	}

	var templateFiles []string
	if baseOverride == "" {
		if rootDir, err := git.ToplevelDir(); err == nil {
			// TODO: figure out how to stub this in tests
			templateFiles = githubtemplate.Find(rootDir, "ISSUE_TEMPLATE")
		}
	}

	if isWeb, err := cmd.Flags().GetBool("web"); err == nil && isWeb {
		// TODO: move URL generation into GitHubRepository
		openURL := fmt.Sprintf("https://github.com/%s/issues/new", ghrepo.FullName(*baseRepo))
		if len(templateFiles) > 1 {
			openURL += "/choose"
		}
		cmd.Printf("Opening %s in your browser.\n", openURL)
		return utils.OpenInBrowser(openURL)
	}

	apiClient, err := apiClientForContext(ctx)
	if err != nil {
		return err
	}

	repo, err := api.GitHubRepo(apiClient, *baseRepo)
	if err != nil {
		return err
	}
	if !repo.HasIssuesEnabled {
		return fmt.Errorf("the '%s' repository has disabled issues", ghrepo.FullName(*baseRepo))
	}

	action := SubmitAction

	title, err := cmd.Flags().GetString("title")
	if err != nil {
		return fmt.Errorf("could not parse title: %w", err)
	}
	body, err := cmd.Flags().GetString("body")
	if err != nil {
		return fmt.Errorf("could not parse body: %w", err)
	}

	interactive := title == "" || body == ""

	if interactive {
		tb, err := titleBodySurvey(cmd, title, body, templateFiles)
		if err != nil {
			return fmt.Errorf("could not collect title and/or body: %w", err)
		}

		action = tb.Action

		if tb.Action == CancelAction {
			fmt.Fprintln(cmd.ErrOrStderr(), "Discarding.")

			return nil
		}

		if title == "" {
			title = tb.Title
		}
		if body == "" {
			body = tb.Body
		}
	}

	if action == PreviewAction {
		openURL := fmt.Sprintf(
			"https://github.com/%s/issues/new/?title=%s&body=%s",
			ghrepo.FullName(*baseRepo),
			url.QueryEscape(title),
			url.QueryEscape(body),
		)
		// TODO could exceed max url length for explorer
		fmt.Fprintf(cmd.ErrOrStderr(), "Opening %s in your browser.\n", displayURL(openURL))
		return utils.OpenInBrowser(openURL)
	} else if action == SubmitAction {
		params := map[string]interface{}{
			"title": title,
			"body":  body,
		}

		newIssue, err := api.IssueCreate(apiClient, repo, params)
		if err != nil {
			return err
		}

		fmt.Fprintln(cmd.OutOrStdout(), newIssue.URL)
	} else {
		panic("Unreachable state")
	}

	return nil
}

func printIssues(w io.Writer, prefix string, totalCount int, issues []api.Issue) {
	for _, issue := range issues {
		number := utils.Green("#" + strconv.Itoa(issue.Number))
		coloredLabels := labelList(issue)
		if coloredLabels != "" {
			coloredLabels = utils.Gray(fmt.Sprintf("  (%s)", coloredLabels))
		}

		now := time.Now()
		ago := now.Sub(issue.UpdatedAt)

		fmt.Fprintf(w, "%s%s %s%s %s\n", prefix, number,
			truncate(70, replaceExcessiveWhitespace(issue.Title)),
			coloredLabels,
			utils.Gray(utils.FuzzyAgo(ago)))
	}
	remaining := totalCount - len(issues)
	if remaining > 0 {
		fmt.Fprintf(w, utils.Gray("%sAnd %d more\n"), prefix, remaining)
	}
}

func labelList(issue api.Issue) string {
	if len(issue.Labels.Nodes) == 0 {
		return ""
	}

	labelNames := []string{}
	for _, label := range issue.Labels.Nodes {
		labelNames = append(labelNames, label.Name)
	}

	list := strings.Join(labelNames, ", ")
	if issue.Labels.TotalCount > len(issue.Labels.Nodes) {
		list += ", …"
	}
	return list
}

func displayURL(urlStr string) string {
	u, err := url.Parse(urlStr)
	if err != nil {
		return urlStr
	}
	return u.Hostname() + u.Path
}