@wordpress/block-library/build-module/query/edit/inspector-controls/parent-control.js

Block library for the WordPress editor.

import { createElement } from "@wordpress/element";

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

import { getEntitiesInfo, mapToIHasNameAndId } from '../../utils';
const EMPTY_ARRAY = [];
const BASE_QUERY = {
  order: 'asc',
  _fields: 'id,title',
  context: 'view'
};

function ParentControl(_ref) {
  let {
    parents,
    postType,
    onChange
  } = _ref;
  const [search, setSearch] = useState('');
  const [value, setValue] = useState(EMPTY_ARRAY);
  const [suggestions, setSuggestions] = useState(EMPTY_ARRAY);
  const debouncedSearch = useDebounce(setSearch, 250);
  const {
    searchResults,
    searchHasResolved
  } = useSelect(select => {
    if (!search) {
      return {
        searchResults: EMPTY_ARRAY,
        searchHasResolved: true
      };
    }

    const {
      getEntityRecords,
      hasFinishedResolution
    } = select(coreStore);
    const selectorArgs = ['postType', postType, { ...BASE_QUERY,
      search,
      orderby: 'relevance',
      exclude: parents,
      per_page: 20
    }];
    return {
      searchResults: getEntityRecords(...selectorArgs),
      searchHasResolved: hasFinishedResolution('getEntityRecords', selectorArgs)
    };
  }, [search, parents]);
  const currentParents = useSelect(select => {
    if (!(parents !== null && parents !== void 0 && parents.length)) return EMPTY_ARRAY;
    const {
      getEntityRecords
    } = select(coreStore);
    return getEntityRecords('postType', postType, { ...BASE_QUERY,
      include: parents,
      per_page: parents.length
    });
  }, [parents]); // Update the `value` state only after the selectors are resolved
  // to avoid emptying the input when we're changing parents.

  useEffect(() => {
    if (!(parents !== null && parents !== void 0 && parents.length)) {
      setValue(EMPTY_ARRAY);
    }

    if (!(currentParents !== null && currentParents !== void 0 && currentParents.length)) return;
    const currentParentsInfo = getEntitiesInfo(mapToIHasNameAndId(currentParents, 'title.rendered')); // Returns only the existing entity ids. This prevents the component
    // from crashing in the editor, when non existing ids are provided.

    const sanitizedValue = parents.reduce((accumulator, id) => {
      const entity = currentParentsInfo.mapById[id];

      if (entity) {
        accumulator.push({
          id,
          value: entity.name
        });
      }

      return accumulator;
    }, []);
    setValue(sanitizedValue);
  }, [parents, currentParents]);
  const entitiesInfo = useMemo(() => {
    if (!(searchResults !== null && searchResults !== void 0 && searchResults.length)) return EMPTY_ARRAY;
    return getEntitiesInfo(mapToIHasNameAndId(searchResults, 'title.rendered'));
  }, [searchResults]); // Update suggestions only when the query has resolved.

  useEffect(() => {
    if (!searchHasResolved) return;
    setSuggestions(entitiesInfo.names);
  }, [entitiesInfo.names, searchHasResolved]);

  const getIdByValue = (entitiesMappedByName, entity) => {
    var _entitiesMappedByName;

    const id = (entity === null || entity === void 0 ? void 0 : entity.id) || (entitiesMappedByName === null || entitiesMappedByName === void 0 ? void 0 : (_entitiesMappedByName = entitiesMappedByName[entity]) === null || _entitiesMappedByName === void 0 ? void 0 : _entitiesMappedByName.id);
    if (id) return id;
  };

  const onParentChange = newValue => {
    const ids = Array.from(newValue.reduce((accumulator, entity) => {
      // Verify that new values point to existing entities.
      const id = getIdByValue(entitiesInfo.mapByName, entity);
      if (id) accumulator.add(id);
      return accumulator;
    }, new Set()));
    setSuggestions(EMPTY_ARRAY);
    onChange({
      parents: ids
    });
  };

  return createElement(FormTokenField, {
    label: __('Parents'),
    value: value,
    onInputChange: debouncedSearch,
    suggestions: suggestions,
    onChange: onParentChange
  });
}

export default ParentControl;
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