@wordpress/editor/build-module/components/post-publish-panel/maybe-category-panel.js

Enhanced block editor for WordPress posts.

/**
 * WordPress dependencies
 */
import { __ } from '@wordpress/i18n';
import { useSelect } from '@wordpress/data';
import { PanelBody } from '@wordpress/components';
import { store as coreStore } from '@wordpress/core-data';
import { useState, useEffect } from '@wordpress/element';

/**
 * Internal dependencies
 */
import HierarchicalTermSelector from '../post-taxonomies/hierarchical-term-selector';
import { store as editorStore } from '../../store';
import { jsx as _jsx, jsxs as _jsxs } from "react/jsx-runtime";
function MaybeCategoryPanel() {
  const {
    hasNoCategory,
    hasSiteCategories
  } = useSelect(select => {
    const postType = select(editorStore).getCurrentPostType();
    const {
      canUser,
      getEntityRecord
    } = select(coreStore);
    const categoriesTaxonomy = getEntityRecord('root', 'taxonomy', 'category');
    const defaultCategoryId = canUser('read', {
      kind: 'root',
      name: 'site'
    }) ? getEntityRecord('root', 'site')?.default_category : undefined;
    const defaultCategory = defaultCategoryId ? getEntityRecord('taxonomy', 'category', defaultCategoryId) : undefined;
    const postTypeSupportsCategories = categoriesTaxonomy && categoriesTaxonomy.types.some(type => type === postType);
    const categories = categoriesTaxonomy && select(editorStore).getEditedPostAttribute(categoriesTaxonomy.rest_base);
    const siteCategories = postTypeSupportsCategories ? !!select(coreStore).getEntityRecords('taxonomy', 'category', {
      exclude: [defaultCategoryId],
      per_page: 1
    })?.length : false;

    // This boolean should return true if everything is loaded
    // ( categoriesTaxonomy, defaultCategory )
    // and the post has not been assigned a category different than "uncategorized".
    const noCategory = !!categoriesTaxonomy && !!defaultCategory && postTypeSupportsCategories && (categories?.length === 0 || categories?.length === 1 && defaultCategory?.id === categories[0]);
    return {
      hasNoCategory: noCategory,
      hasSiteCategories: siteCategories
    };
  }, []);
  const [shouldShowPanel, setShouldShowPanel] = useState(false);
  useEffect(() => {
    // We use state to avoid hiding the panel if the user edits the categories
    // and adds one within the panel itself (while visible).
    if (hasNoCategory) {
      setShouldShowPanel(true);
    }
  }, [hasNoCategory]);

  // We only want to show the category panel:
  // if the post type supports categories,
  // if the site has categories other than the default category,
  // and if the post has no other categories than the default category.
  if (!shouldShowPanel || !hasSiteCategories) {
    return null;
  }
  const panelBodyTitle = [__('Suggestion:'), /*#__PURE__*/_jsx("span", {
    className: "editor-post-publish-panel__link",
    children: __('Assign a category')
  }, "label")];
  return /*#__PURE__*/_jsxs(PanelBody, {
    initialOpen: false,
    title: panelBodyTitle,
    children: [/*#__PURE__*/_jsx("p", {
      children: __('Categories provide a helpful way to group related posts together and to quickly tell readers what a post is about.')
    }), /*#__PURE__*/_jsx(HierarchicalTermSelector, {
      slug: "category"
    })]
  });
}
export default MaybeCategoryPanel;
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