fix: export class of DefaultConfig (#38)

tsc throw errors when tsconfig.json set "declaration": true config/defaultConfig.ts(9,1): error TS4082: Default export of the module has or is using private name 'DefaultConfig'. config/defaultConfig.ts(13,28): error TS4033: Property 'config' of exported interface has or is using private name 'DefaultConfig'. define interface NewsItem as return type of HackerNews.getItem() for types recognition app/controller/news.ts: variable newsList can be recognized as type of NewsItem[] correctly instead of an object missing array

Author: waitingsong

hackernews-async-ts/app/router.ts

@@ -1,5 +1,6 @@
 import { Application } from 'egg';
-module.exports = (app: Application) => {
+
+export default (app: Application) => {
  const controller = app.controller;
  app.redirect('/', '/news');
  app.get('/news', controller.news.list);

hackernews-async-ts/app/service/HackerNews.ts

@@ -1,9 +1,21 @@
 import { Context, Service } from 'egg';
 
+export interface NewsItem {
+ id: number;
+ score: number;
+ time: number;
+ title: string;
+ type: string;
+ url: string;
+ descendants: number;
+ kids: number[];
+ by: string;
+}
+
 /**
  * HackerNews Api Service
  */
-export default class HackerNews extends Service {
+export class HackerNews extends Service {
  constructor(ctx: Context) {
  super(ctx);
  }
@@ -54,17 +66,7 @@ export default class HackerNews extends Service {
  * query item
  * @param id - itemId
  */
- public async getItem(id: number): Promise<{
- id: number;
- score: number;
- time: number;
- title: string;
- type: string;
- url: string;
- descendants: number;
- kids: number[];
- by: string;
- }> {
+ public async getItem(id: number): Promise<NewsItem> {
  return await this.request(`item/${id}.json`);
  }
 
@@ -76,3 +78,5 @@ export default class HackerNews extends Service {
  return await this.request(`user/${id}.json`);
  }
 }
+
+export default HackerNews;

hackernews-async-ts/config/config.ts

@@ -5,7 +5,7 @@ import * as path from 'path';
 import 'source-map-support/register';
 import defaultConfig from './defaultConfig';
 
-module.exports = (appInfo: EggAppConfig) => {
+export default (appInfo: EggAppConfig) => {
  const config: any = {};
 
  // should change to your own

hackernews-async-ts/config/defaultConfig.ts

@@ -1,4 +1,4 @@
-class DefaultConfig {
+export class DefaultConfig {
  news = {
  pageSize: 30,
  serverUrl: 'https://hacker-news.firebaseio.com/v0',