@coorpacademy/progression-engine/es/reducers/viewed-resources.js

import _includes from "lodash/fp/includes";
import _get from "lodash/fp/get";
import _findIndex from "lodash/fp/findIndex";
import _concat from "lodash/fp/concat";
export default function viewedResources(config) {
  return (currentViewedResources = [], action) => {
    switch (action.type) {
      case 'resource':
        {
          const resourceViewAction = action;
          const contentRef = resourceViewAction.payload.content.ref;
          const contentType = resourceViewAction.payload.content.type;
          const resourceRef = resourceViewAction.payload.resource.ref;
          const contentIndex = _findIndex({
            ref: contentRef
          }, currentViewedResources);
          if (contentIndex === -1) {
            return _concat(currentViewedResources)([{
              ref: contentRef,
              type: contentType,
              resources: [resourceRef]
            }]);
          }
          const contentResources = _get('resources', currentViewedResources[contentIndex]);
          const resourceAlreadyViewed = _includes(resourceRef, contentResources);
          if (resourceAlreadyViewed) return currentViewedResources;
          // return currentViewedResources, contentIndex, resourceRef;
          const newViewedResources = [...currentViewedResources];
          newViewedResources[contentIndex] = {
            ...newViewedResources[contentIndex],
            resources: _concat(newViewedResources[contentIndex].resources, [resourceRef])
          };
          return newViewedResources;
        }
      default:
        return currentViewedResources;
    }
  };
}
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