Function ParseDiscussionOrCommentArg

pkg/cmd/discussion/shared/lookup.go:67–111

ParseDiscussionOrCommentArg parses a positional argument that can be a discussion number, discussion URL, comment node ID (DC_...), or comment URL (with a "#discussioncomment-NNNNN" fragment).

(arg string)

// ParseDiscussionOrCommentArg parses a positional argument that can be a discussion number,
// discussion URL, comment node ID (DC_...), or comment URL (with a "#discussioncomment-NNNNN" fragment).
func ParseDiscussionOrCommentArg(arg string) (*ParsedDiscussionOrCommentArg, error) {
	if strings.HasPrefix(arg, "DC_") {
		return &ParsedDiscussionOrCommentArg{CommentNodeID: arg}, nil
	}

	if num, err := strconv.ParseInt(arg, 10, 32); err == nil {
		return &ParsedDiscussionOrCommentArg{Number: int32(num)}, nil
	}
	if len(arg) > 1 && arg[0] == '#' {
		if num, err := strconv.ParseInt(arg[1:], 10, 32); err == nil {
			return &ParsedDiscussionOrCommentArg{Number: int32(num)}, nil
		}
	}

	u, err := url.Parse(arg)
	if err != nil || (u.Scheme != "http" && u.Scheme != "https") {
		return nil, fmt.Errorf("invalid argument: %q (expected a discussion number, URL, or comment ID)", arg)
	}

	m := discussionURLRE.FindStringSubmatch(u.Path)
	if m == nil {
		return nil, fmt.Errorf("invalid discussion URL: %q", arg)
	}

	num, err := strconv.ParseInt(m[3], 10, 32)
	if err != nil {
		return nil, fmt.Errorf("invalid discussion number in URL: %q", m[3])
	}
	repo := ghrepo.NewWithHost(m[1], m[2], u.Hostname())

	if fragment := u.Fragment; strings.HasPrefix(fragment, "discussioncomment-") {
		commentNumStr := strings.TrimPrefix(fragment, "discussioncomment-")
		commentNum, err := strconv.ParseInt(commentNumStr, 10, 64)
		if err != nil {
			return nil, fmt.Errorf("invalid comment ID in URL fragment: %q", fragment)
		}
		return &ParsedDiscussionOrCommentArg{
			Number:            int32(num),
			Repo:              repo,
			CommentDatabaseID: commentNum,
		}, nil
	}

	return &ParsedDiscussionOrCommentArg{Number: int32(num), Repo: repo}, nil
}