department-of-veterans-affairs/vets-website

/**
 * Helper that takes query params and sets labels and return paths for
 * the multiresponse (list/loop) information pages
 * @param {Object} props - the original dataset, key name, localData object,
 * search index, view field object and ref item for the src array
 * @returns {Object} - the dataset to return
 */
export function getDataToSet(props) {
  const { slices, dataKey, localData, listRef, viewFields } = props;
  return localData === null
    ? { [dataKey]: listRef, [viewFields.add]: null, [viewFields.skip]: true }
    : {
        [dataKey]: [...slices.beforeIndex, localData, ...slices.afterIndex],
        [viewFields.add]: null,
        [viewFields.skip]: true,
      };
}

/**
 * Helper that takes query params and sets labels and return paths for
 * the multiresponse (list/loop) information pages
 * @param {Object} params - the URL Search Params object to query
 * @param {String} returnPath - the path to return upon completing an update action
 * @returns {Object} - the labels, returnPath and action mode
 */
export function getSearchAction(params, returnPath) {
  const mode = params.get('action') || 'add';
  return {
    mode,
    label: `${mode === 'add' ? 'add' : 'edit'}ing`,
    pathToGo: mode === 'update' ? '/review-and-submit' : `/${returnPath}`,
  };
}

/**
 * Helper that takes query params and looks for an associated index in the
 * provided array
 * @param {Object} params - the URL Search Params object to query
 * @param {Array} array - the array from which to find the index value
 * @returns {Number} - the desired index of the array
 */
export function getSearchIndex(params, array = []) {
  let indexToReturn = parseInt(params.get('index'), 10);
  if (Number.isNaN(indexToReturn) || indexToReturn > array.length) {
    indexToReturn = array.length;
  }
  return indexToReturn;
}

/**
 * Helper that determines the default dataset to use based on search params
 * @param {Object} props - the params to use to parse the default state
 * @returns {Object} - the parsed state data
 */
export function getDefaultState(props) {
  const {
    searchIndex,
    searchAction,
    defaultData,
    dataToSearch = [],
    name,
  } = props;
  const resultToReturn = { ...defaultData };

  // check if data exists at the array index and set return result accordingly
  if (typeof dataToSearch[searchIndex] !== 'undefined') {
    resultToReturn.data = dataToSearch[searchIndex];

    if (searchAction.mode !== 'add') {
      window.sessionStorage.setItem(name, searchIndex);
    }
  }

  return resultToReturn;
}