@wordpress/editor/build-module/utils/terms.js

Enhanced block editor for WordPress posts.

/**
 * External dependencies
 */
import { groupBy, map, unescape as lodashUnescapeString } from 'lodash';
/**
 * Returns terms in a tree form.
 *
 * @param {Array} flatTerms  Array of terms in flat format.
 *
 * @return {Array} Array of terms in tree format.
 */

export function buildTermsTree(flatTerms) {
  const flatTermsWithParentAndChildren = flatTerms.map(term => {
    return {
      children: [],
      parent: null,
      ...term
    };
  });
  const termsByParent = groupBy(flatTermsWithParentAndChildren, 'parent');

  if (termsByParent.null && termsByParent.null.length) {
    return flatTermsWithParentAndChildren;
  }

  const fillWithChildren = terms => {
    return terms.map(term => {
      const children = termsByParent[term.id];
      return { ...term,
        children: children && children.length ? fillWithChildren(children) : []
      };
    });
  };

  return fillWithChildren(termsByParent['0'] || []);
} // Lodash unescape function handles ' but not ' which may be return in some API requests.

export const unescapeString = arg => {
  return lodashUnescapeString(arg.replace(''', "'"));
};
/**
 * Returns a term object with name unescaped.
 * The unescape of the name property is done using lodash unescape function.
 *
 * @param {Object} term The term object to unescape.
 *
 * @return {Object} Term object with name property unescaped.
 */

export const unescapeTerm = term => {
  return { ...term,
    name: unescapeString(term.name)
  };
};
/**
 * Returns an array of term objects with names unescaped.
 * The unescape of each term is performed using the unescapeTerm function.
 *
 * @param {Object[]} terms Array of term objects to unescape.
 *
 * @return {Object[]} Array of term objects unescaped.
 */

export const unescapeTerms = terms => {
  return map(terms, unescapeTerm);
};
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