redux-tiles/src/middleware.ts

Library to create and easily compose redux pieces together in less verbose manner

import { Action, Dispatch, Middleware } from 'redux';
import { IPromiseObject } from './tiles/types';
import { waitTiles } from './waitTiles';

export function createMiddleware(paramsToInject: any = {}): { middleware: Middleware, waitTiles: Function} {
  const promisesStorage: IPromiseObject = {};

  const middleware: Middleware = (
    { dispatch, getState }: { dispatch: Dispatch<any>, getState(): any }
  ): ((next: Dispatch<any>) => Dispatch<any>) =>
    (next: Dispatch<any>): Dispatch<any> => (action: Action): Action => {
    if (typeof action === 'function') {
      return action({ dispatch, getState, promisesStorage, ...paramsToInject });
    }

    return next(action);
  };

  return {
    middleware,
    waitTiles: waitTiles.bind(null, promisesStorage)
  };
}