LearnersGuild/echo

import {
  GET_CHAPTER_REQUEST,
  GET_CHAPTER_SUCCESS,
  GET_CHAPTER_FAILURE,
  FIND_CHAPTERS_REQUEST,
  FIND_CHAPTERS_SUCCESS,
  FIND_CHAPTERS_FAILURE,
  SAVE_CHAPTER_REQUEST,
  SAVE_CHAPTER_SUCCESS,
  SAVE_CHAPTER_FAILURE,
  ADD_INVITE_CODE_TO_CHAPTER_REQUEST,
  ADD_INVITE_CODE_TO_CHAPTER_SUCCESS,
  ADD_INVITE_CODE_TO_CHAPTER_FAILURE,
  FIND_MEMBERS_SUCCESS,
  REASSIGN_MEMBERS_TO_CHAPTER_SUCCESS,
} from 'src/common/actions/types'
 
import {mergeEntities} from '../util'
 
const initialState = {
  chapters: {},
  isBusy: false,
}
 
Function `chapters` has 31 lines of code (exceeds 25 allowed). Consider refactoring.
export default function chapters(state = initialState, action) {
  switch (action.type) {
    case GET_CHAPTER_REQUEST:
    case FIND_CHAPTERS_REQUEST:
    case ADD_INVITE_CODE_TO_CHAPTER_REQUEST:
    case SAVE_CHAPTER_REQUEST:
      return Object.assign({}, state, {
        isBusy: true,
      })
    case GET_CHAPTER_SUCCESS:
    case FIND_CHAPTERS_SUCCESS:
    case ADD_INVITE_CODE_TO_CHAPTER_SUCCESS:
    case SAVE_CHAPTER_SUCCESS:
    case FIND_MEMBERS_SUCCESS:
    case REASSIGN_MEMBERS_TO_CHAPTER_SUCCESS:
      {
        const chapters = mergeEntities(state.chapters, action.response.entities.chapters)
        return Object.assign({}, state, {
          isBusy: false,
          chapters,
        })
      }
    case GET_CHAPTER_FAILURE:
    case FIND_CHAPTERS_FAILURE:
    case ADD_INVITE_CODE_TO_CHAPTER_FAILURE:
    case SAVE_CHAPTER_FAILURE:
      return Object.assign({}, state, {
        isBusy: false,
      })
    default:
      return state
  }
}