@wordpress/core-data/build-module/batch/default-processor.js

Access to and manipulation of core WordPress entities.

/**
 * WordPress dependencies
 */
import apiFetch from '@wordpress/api-fetch';

/**
 * Maximum number of requests to place in a single batch request. Obtained by
 * sending a preflight OPTIONS request to /batch/v1/.
 *
 * @type {number?}
 */
let maxItems = null;
function chunk(arr, chunkSize) {
  const tmp = [...arr];
  const cache = [];
  while (tmp.length) {
    cache.push(tmp.splice(0, chunkSize));
  }
  return cache;
}

/**
 * Default batch processor. Sends its input requests to /batch/v1.
 *
 * @param {Array} requests List of API requests to perform at once.
 *
 * @return {Promise} Promise that resolves to a list of objects containing
 *                   either `output` (if that request was successful) or `error`
 *                   (if not ).
 */
export default async function defaultProcessor(requests) {
  if (maxItems === null) {
    const preflightResponse = await apiFetch({
      path: '/batch/v1',
      method: 'OPTIONS'
    });
    maxItems = preflightResponse.endpoints[0].args.requests.maxItems;
  }
  const results = [];

  // @ts-ignore We would have crashed or never gotten to this point if we hadn't received the maxItems count.
  for (const batchRequests of chunk(requests, maxItems)) {
    const batchResponse = await apiFetch({
      path: '/batch/v1',
      method: 'POST',
      data: {
        validation: 'require-all-validate',
        requests: batchRequests.map(request => ({
          path: request.path,
          body: request.data,
          // Rename 'data' to 'body'.
          method: request.method,
          headers: request.headers
        }))
      }
    });
    let batchResults;
    if (batchResponse.failed) {
      batchResults = batchResponse.responses.map(response => ({
        error: response?.body
      }));
    } else {
      batchResults = batchResponse.responses.map(response => {
        const result = {};
        if (response.status >= 200 && response.status < 300) {
          result.output = response.body;
        } else {
          result.error = response.body;
        }
        return result;
      });
    }
    results.push(...batchResults);
  }
  return results;
}
//# sourceMappingURL=default-processor.js.map