import _classCallCheck from "@babel/runtime/helpers/esm/classCallCheck";
import _createClass from "@babel/runtime/helpers/esm/createClass";
/**
 * source by `component-classes`
 * https://github.com/component/classes.git
 */
import indexOf from 'lodash-es/indexOf';
/**
 * Whitespace regexp.
 */
var re = /\s+/;
export var ClassList = /*#__PURE__*/function () {
  function ClassList(el) {
    _classCallCheck(this, ClassList);
    if (!el || !el.nodeType) {
      throw new Error('A DOM element reference is required');
    }
    this.el = el;
    this.list = el.classList;
  }
  _createClass(ClassList, [{
    key: "array",
    value: function array() {
      var className = this.el.getAttribute('class') || '';
      var str = className.replace(/^\s+|\s+$/g, '');
      var arr = str.split(re);
      if ('' === arr[0]) arr.shift();
      return arr;
    }
    /**
     * Add class `name` if not already present.
     *
     * @param {String} name
     * @return {ClassList}
     * @api public
     */
  }, {
    key: "add",
    value: function add(name) {
      // classList
      if (this.list) {
        this.list.add(name);
        return this;
      }
      // fallback
      var arr = this.array();
      var i = indexOf(arr, name);
      if (!~i) arr.push(name);
      this.el.className = arr.join(' ');
      return this;
    }
    /**
     * Remove class `name` when present, or
     * pass a regular expression to remove
     * any which match.
     *
     * @param {String|RegExp} name
     * @return {ClassList}
     * @api public
     */
  }, {
    key: "remove",
    value: function remove(name) {
      if ('[object RegExp]' === toString.call(name)) {
        return this._removeMatching(name);
      }
      // classList
      if (this.list) {
        this.list.remove(name);
        return this;
      }
      // fallback
      var arr = this.array();
      var i = indexOf(arr, name);
      if (~i) arr.splice(i, 1);
      this.el.className = arr.join(' ');
      return this;
    }
    /**
     * Remove all classes matching `re`.
     *
     * @param {RegExp} re
     * @return {ClassList}
     * @api private
     */
  }, {
    key: "_removeMatching",
    value: function _removeMatching(re) {
      var arr = this.array();
      for (var i = 0; i < arr.length; i++) {
        if (re.test(arr[i])) {
          this.remove(arr[i]);
        }
      }
      return this;
    }
    /**
     * Toggle class `name`, can force state via `force`.
     *
     * For browsers that support classList, but do not support `force` yet,
     * the mistake will be detected and corrected.
     *
     * @param {String} name
     * @param {Boolean} force
     * @return {ClassList}
     * @api public
     */
  }, {
    key: "toggle",
    value: function toggle(name, force) {
      // classList
      if (this.list) {
        if ('undefined' !== typeof force) {
          if (force !== this.list.toggle(name, force)) {
            this.list.toggle(name); // toggle again to correct
          }
        } else {
          this.list.toggle(name);
        }
        return this;
      }
      // fallback
      if ('undefined' !== typeof force) {
        if (!force) {
          this.remove(name);
        } else {
          this.add(name);
        }
      } else {
        if (this.has(name)) {
          this.remove(name);
        } else {
          this.add(name);
        }
      }
      return this;
    }
    /**
     * Check if class `name` is present.
     *
     * @param {String} name
     * @api public
     */
  }, {
    key: "has",
    value: function has(name) {
      return this.list ? this.list.contains(name) : !!~indexOf(this.array(), name);
    }
    /**
     * Check if class `name` is present.
     *
     * @param {String} name
     * @api public
     */
  }, {
    key: "contains",
    value: function contains(name) {
      return this.has(name);
    }
  }]);
  return ClassList;
}();
/**
 * Wrap `el` in a `ClassList`.
 *
 * @param {Element} el
 * @return {ClassList}
 * @api public
 */
export default function (el) {
  return new ClassList(el);
}