Function updatePagination

examples/real-world/src/reducers/paginate.js:18–46

(state = {
    isFetching: false,
    nextPageUrl: undefined,
    pageCount: 0,
    ids: []
  }, action)

  const [ requestType, successType, failureType ] = types

  const updatePagination = (state = {
    isFetching: false,
    nextPageUrl: undefined,
    pageCount: 0,
    ids: []
  }, action) => {
    switch (action.type) {
      case requestType:
        return {
          ...state,
          isFetching: true
        }
      case successType:
        return {
          ...state,
          isFetching: false,
          ids: union(state.ids, action.response.result),
          nextPageUrl: action.response.nextPageUrl,
          pageCount: state.pageCount + 1
        }
      case failureType:
        return {
          ...state,
          isFetching: false
        }
      default:
        return state
    }
  }

  return (state = {}, action) => {
    // Update pagination by key