@shopgate/engage/a11y/reducers/index.js

Shopgate's ENGAGE library.

import { produce } from 'immer';
import { isDev, logger } from '@shopgate/engage/core/helpers';
import { A11Y_INCREASE_MODAL_COUNT, A11Y_DECREASE_MODAL_COUNT } from "../constants";
const defaultState = {
  modalCount: 0
};

/**
 * Stores a11y state
 * @param {Object} [state={}] The current state.
 * @param {Object} action The action object.
 * @returns {Object} The new state.
 */
export default function a11y(state = defaultState, action = {}) {
  const producer = produce(draft => {
    switch (action.type) {
      case A11Y_INCREASE_MODAL_COUNT:
        {
          draft.modalCount += 1;
          break;
        }
      case A11Y_DECREASE_MODAL_COUNT:
        {
          draft.modalCount -= 1;
          if (draft.modalCount < 0) {
            if (isDev) {
              logger.warn('Modal count is negative, resetting to 0');
            }
            draft.modalCount = 0;
          }
          break;
        }
      default:
        break;
    }
  });
  return producer(state);
}