/**
 * Copyright (C) 2022, Dmitriy Pleshevskiy <dmitriy@ideascup.me>
 *
 * This file is part of Paren
 *
 * Paren is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Paren is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Paren.  If not, see <https://www.gnu.org/licenses/>.
 */
import { Attrs } from "../core/node.ts";
import { isNotSkip, isStr, join, Skipable } from "../core/utils.ts";

export function classNames(vals: string | Skipable<string>[]): Attrs {
  const val = isStr(vals) ? vals : join(" ", vals.filter(isNotSkip));
  return !val.length ? {} : { class: val };
}