@shopgate/pwa-common-commerce/reviews/reducers/reviewsByHash.js

Commerce library for the Shopgate Connect PWA.

import uniq from 'lodash/uniq';
import { REVIEWS_LIFETIME, REQUEST_REVIEWS, RECEIVE_REVIEWS, ERROR_REVIEWS } from "../constants";

/**
 * Stores a collection of products by the related hash of the request parameters.
 * @param {Object} [state={}] The current state.
 * @param {Object} action The current redux action.
 * @return {Object} The new state.
 */
function reviewsByHash(state = {}, action = {}) {
  switch (action.type) {
    case REQUEST_REVIEWS:
      return {
        ...state,
        [action.hash]: {
          ...state[action.hash],
          isFetching: true,
          expires: 0
        }
      };
    case RECEIVE_REVIEWS:
      {
        const reviews = state[action.hash].reviews || [];
        const nextReviews = action.reviews || [];

        /**
         * If there are no previous reviews and no incoming reviews
         * its set to empty array, otherwise it will be an array of the previous and the
         * new reviews. Duplicates are removed.
         */
        const stateReviews = reviews || nextReviews.length ? uniq([].concat(reviews, nextReviews.map(review => review.id))) : [];
        return {
          ...state,
          [action.hash]: {
            ...state[action.hash],
            reviews: stateReviews,
            totalReviewCount: action.totalReviewCount || null,
            isFetching: false,
            expires: Date.now() + REVIEWS_LIFETIME
          }
        };
      }
    case ERROR_REVIEWS:
      return {
        ...state,
        [action.hash]: {
          ...state[action.hash],
          isFetching: false,
          expires: 0
        }
      };
    default:
      return state;
  }
}
export default reviewsByHash;