volumen/internal/fediverse/fediverse.go

// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0

// Package fediverse validates the fediverse handle that posts, users and
// the site configuration carry. It is a leaf so that the configuration
// and the domain object can share one rule without either importing the
// other.
package fediverse

import "regexp"

var handleRe = regexp.MustCompile(`\A@[^@\s]+@[^@\s]+\z`)

// Valid reports whether handle looks like @user@host.
func Valid(handle string) bool {
	return handleRe.MatchString(handle)
}