@gitlab/ui/src/components/base/new_dropdowns/disclosure/utils.js

GitLab UI Components

import Vue from 'vue';
import isFunction from 'lodash/isFunction';
import isString from 'lodash/isString';
import { DISCLOSURE_DROPDOWN_ITEM_NAME, DISCLOSURE_DROPDOWN_GROUP_NAME } from './constants';

const itemValidator = (item) => item?.text?.length > 0 && !Array.isArray(item?.items);

const isItem = (item) => Boolean(item) && itemValidator(item);

const isGroup = (group) =>
  Boolean(group) &&
  Array.isArray(group.items) &&
  Boolean(group.items.length) &&
  // eslint-disable-next-line unicorn/no-array-callback-reference
  group.items.every(isItem);

// eslint-disable-next-line unicorn/no-array-callback-reference
const itemsValidator = (items) => items.every(isItem) || items.every(isGroup);

const isListItem = (tag) =>
  ['gl-disclosure-dropdown-group', 'gl-disclosure-dropdown-item', 'li'].includes(tag);

const isValidSlotTagVue2 = (vNode) =>
  Boolean(vNode) && isListItem(vNode.componentOptions?.tag || vNode.tag);

const isValidSlotTagVue3 = (vNode) => {
  return (
    [DISCLOSURE_DROPDOWN_ITEM_NAME, DISCLOSURE_DROPDOWN_GROUP_NAME].includes(vNode.type?.name) ||
    vNode.type === 'li'
  );
};

const hasOnlyListItemsVue2 = (defaultSlot) => {
  const nodes = defaultSlot();

  if (!Array.isArray(nodes)) {
    return false;
  }

  const tags = nodes.filter((vNode) => vNode.tag);

  return tags.length && tags.every((tag) => isValidSlotTagVue2(tag));
};

const hasOnlyListItemsVue3 = (defaultSlot) => {
  const nodes = defaultSlot();
  const fragment = nodes.find((node) => Array.isArray(node.children) && node.children.length);
  const targetNodes = fragment ? fragment.children : nodes;

  return (
    targetNodes
      // Remove empty text vNodes
      .filter((vNode) => !isString(vNode.text) || vNode.text.trim().length > 0)
      .every((vNode) => isValidSlotTagVue3(vNode))
  );
};

const hasOnlyListItems = (defaultSlot) => {
  if (!isFunction(defaultSlot)) {
    return false;
  }

  if (Vue.version.startsWith('3')) {
    return hasOnlyListItemsVue3(defaultSlot);
  }

  return hasOnlyListItemsVue2(defaultSlot);
};

export { itemsValidator, isItem, isGroup, hasOnlyListItems };