@gitlab/ui/dist/components/base/new_dropdowns/listbox/utils.js

GitLab UI Components

import { isString, isNumber } from 'lodash-es';

const isOption = item => Boolean(item) && (isString(item.value) || isNumber(item.value) || item.value === null);

// eslint-disable-next-line unicorn/no-array-callback-reference
const isGroup = function () {
  let _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
    options = _ref.options;
  return Array.isArray(options) && options.every(isOption);
};
const hasNoDuplicates = array => array.length === new Set(array).size;
const flattenedOptions = items => items.flatMap(item => isOption(item) ? item : item.options);

// eslint-disable-next-line unicorn/no-array-callback-reference
const isAllOptionsOrAllGroups = items => items.every(isOption) || items.every(isGroup);
const hasUniqueValues = items => hasNoDuplicates(flattenedOptions(items).map(_ref2 => {
  let value = _ref2.value;
  return value;
}));

// eslint-disable-next-line unicorn/no-array-callback-reference
const hasUniqueGroups = items => hasNoDuplicates(items.filter(isGroup).map(_ref3 => {
  let text = _ref3.text;
  return text;
}));
const itemsValidator = items => isAllOptionsOrAllGroups(items) && hasUniqueValues(items) && hasUniqueGroups(items);

export { flattenedOptions, isOption, itemsValidator };