@airbnb/lunar-apollo/esm/updaters/addToList.js

Apollo and GraphQL utilities.

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

import get from 'lodash/get';
import set from 'lodash/set';
import prepareQuery from '../utils/prepareQuery';
import getQueryName from '../utils/getQueryName';
export default function addToList(docOrQuery, listPath, mutationPath) {
  const query = prepareQuery(docOrQuery);
  return (cache, mutationResult) => {
    const queryResult = cache.readQuery(query);

    const nextResult = _extends({}, queryResult);

    const list = get(queryResult, listPath);

    if (typeof list === 'undefined' || !Array.isArray(list)) {
      if ("production" !== process.env.NODE_ENV) {
        throw new TypeError("\"" + getQueryName(query.query) + "\" list \"" + listPath + "\" is not an array.");
      } else {
        return;
      }
    }

    const data = get(mutationResult.data, mutationPath);

    if (typeof data === 'undefined') {
      if ("production" !== process.env.NODE_ENV) {
        throw new Error("Cannot find mutation \"" + mutationPath + "\". Unable to update query list.");
      } else {
        return;
      }
    }

    set(nextResult, listPath, [...list, data]);
    cache.writeQuery(_extends({}, query, {
      data: nextResult
    }));
  };
}