pdf-reader-web/reducers/index.ts

import * as mainActions from './main';
import * as pdfActions from './pdf';
import * as types from '../constants/actionTypes';

const createReducer = (handlers: {[key: string]: any}) => (
  state: Record<string, any>,
  action: { type: string },
): any => {
  if (!Object.prototype.hasOwnProperty.call(handlers, action.type)) {
    return state;
  }

  return handlers[action.type](state, action);
};

export default createReducer({
  [types.SWITCH_NAVBAR]: mainActions.setNavbarState,
  [types.SWITCH_SIDEBAR]: mainActions.setSidebarState,

  [types.SET_CURRENT_PAGE]: pdfActions.setCurrentPage,
  [types.SET_TOTAL_PAGE]: pdfActions.setTotalPage,
  [types.SET_PDF]: pdfActions.setPdf,
  [types.SET_PROGRESS]: pdfActions.setProgress,
  [types.SET_VIEWPORT]: pdfActions.setViewport,
  [types.CHANGE_SCALE]: pdfActions.changeScale,
  [types.CHANGE_ROTATE]: pdfActions.changeRotate,
});