@wordpress/block-library/build-module/navigation/use-navigation-menu.js

Block library for the WordPress editor.

/**
 * WordPress dependencies
 */
import { store as coreStore, useResourcePermissions, useEntityRecords } from '@wordpress/core-data';
import { useSelect } from '@wordpress/data';

/**
 * Internal dependencies
 */
import { PRELOADED_NAVIGATION_MENUS_QUERY } from './constants';
export default function useNavigationMenu(ref) {
  const permissions = useResourcePermissions({
    kind: 'postType',
    name: 'wp_navigation',
    id: ref
  });
  const {
    navigationMenu,
    isNavigationMenuResolved,
    isNavigationMenuMissing
  } = useSelect(select => {
    return selectExistingMenu(select, ref);
  }, [ref]);
  const {
    // Can the user create navigation menus?
    canCreate: canCreateNavigationMenus,
    // Can the user update the specific navigation menu with the given post ID?
    canUpdate: canUpdateNavigationMenu,
    // Can the user delete the specific navigation menu with the given post ID?
    canDelete: canDeleteNavigationMenu,
    isResolving: isResolvingPermissions,
    hasResolved: hasResolvedPermissions
  } = permissions;
  const {
    records: navigationMenus,
    isResolving: isResolvingNavigationMenus,
    hasResolved: hasResolvedNavigationMenus
  } = useEntityRecords('postType', `wp_navigation`, PRELOADED_NAVIGATION_MENUS_QUERY);
  const canSwitchNavigationMenu = ref ? navigationMenus?.length > 1 : navigationMenus?.length > 0;
  return {
    navigationMenu,
    isNavigationMenuResolved,
    isNavigationMenuMissing,
    navigationMenus,
    isResolvingNavigationMenus,
    hasResolvedNavigationMenus,
    canSwitchNavigationMenu,
    canUserCreateNavigationMenus: canCreateNavigationMenus,
    isResolvingCanUserCreateNavigationMenus: isResolvingPermissions,
    hasResolvedCanUserCreateNavigationMenus: hasResolvedPermissions,
    canUserUpdateNavigationMenu: canUpdateNavigationMenu,
    hasResolvedCanUserUpdateNavigationMenu: ref ? hasResolvedPermissions : undefined,
    canUserDeleteNavigationMenu: canDeleteNavigationMenu,
    hasResolvedCanUserDeleteNavigationMenu: ref ? hasResolvedPermissions : undefined
  };
}
function selectExistingMenu(select, ref) {
  if (!ref) {
    return {
      isNavigationMenuResolved: false,
      isNavigationMenuMissing: true
    };
  }
  const {
    getEntityRecord,
    getEditedEntityRecord,
    hasFinishedResolution
  } = select(coreStore);
  const args = ['postType', 'wp_navigation', ref];
  const navigationMenu = getEntityRecord(...args);
  const editedNavigationMenu = getEditedEntityRecord(...args);
  const hasResolvedNavigationMenu = hasFinishedResolution('getEditedEntityRecord', args);

  // Only published Navigation posts are considered valid.
  // Draft Navigation posts are valid only on the editor,
  // requiring a post update to publish to show in frontend.
  // To achieve that, index.php must reflect this validation only for published.
  const isNavigationMenuPublishedOrDraft = editedNavigationMenu.status === 'publish' || editedNavigationMenu.status === 'draft';
  return {
    isNavigationMenuResolved: hasResolvedNavigationMenu,
    isNavigationMenuMissing: hasResolvedNavigationMenu && (!navigationMenu || !isNavigationMenuPublishedOrDraft),
    // getEditedEntityRecord will return the post regardless of status.
    // Therefore if the found post is not published then we should ignore it.
    navigationMenu: isNavigationMenuPublishedOrDraft ? editedNavigationMenu : null
  };
}
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