@wordpress/core-data/build-module/footnotes/get-footnotes-order.js

Access to and manipulation of core WordPress entities.

/**
 * Internal dependencies
 */
import getRichTextValuesCached from './get-rich-text-values-cached';
const cache = new WeakMap();
function getBlockFootnotesOrder(block) {
  if (!cache.has(block)) {
    const order = [];
    for (const value of getRichTextValuesCached(block)) {
      if (!value) {
        continue;
      }

      // replacements is a sparse array, use forEach to skip empty slots.
      value.replacements.forEach(({
        type,
        attributes
      }) => {
        if (type === 'core/footnote') {
          order.push(attributes['data-fn']);
        }
      });
    }
    cache.set(block, order);
  }
  return cache.get(block);
}
export default function getFootnotesOrder(blocks) {
  // We can only separate getting order from blocks at the root level. For
  // deeper inner blocks, this will not work since it's possible to have both
  // inner blocks and block attributes, so order needs to be computed from the
  // Edit functions as a whole.
  return blocks.flatMap(getBlockFootnotesOrder);
}
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