WIP: setup InstallProvider

packages/slackbot-proxy/.env

@@ -0,0 +1 @@
+SLACK_INSTALLPROVIDER_STATE_SECRET=change-it

packages/slackbot-proxy/src/controllers/slack.ts

@@ -1,21 +1,67 @@
-import { Controller, Get, Post } from '@tsed/common';
+import {
+  BodyParams, Context, Controller, Get, Post, Req, Res,
+} from '@tsed/common';
+
+import { InstallProvider } from '@slack/oauth';
+import { parse as parseUrl } from 'url';
 
 @Controller('/slack')
 export class SlackCtrl {
 
+  installer: InstallProvider;
+
+  constructor() {
+    const clientId = process.env.SLACK_CLIENT_ID;
+    const clientSecret = process.env.SLACK_CLIENT_SECRET;
+    const stateSecret = process.env.SLACK_INSTALLPROVIDER_STATE_SECRET;
+
+    if (clientId === undefined) {
+      throw new Error('The environment variable \'SLACK_CLIENT_ID\' must be defined.');
+    }
+    if (clientSecret === undefined) {
+      throw new Error('The environment variable \'SLACK_CLIENT_SECRET\' must be defined.');
+    }
+
+    this.installer = new InstallProvider({
+      clientId,
+      clientSecret,
+      stateSecret,
+    });
+  }
+
   @Post('/events')
-  handlewithBolt(): string {
+  handlewEvent(@BodyParams() body: any, @Res() res: Res): string {
+    // Send response immediately to avoid opelation_timeout error
+    // See https://api.slack.com/apis/connections/events-api#the-events-api__responding-to-events
+    res.send();
+
+    console.log('body', body);
+
     return 'This action will be handled by bolt service.';
   }
 
   @Get('/oauth_redirect')
-  handleOauthRedirect(): string {
-    // see: https://slack.dev/bolt-js/ja-jp/concepts#authenticating-oauth
-    // see: https://slack.dev/node-slack-sdk/oauth#handling-the-oauth-redirect
+  handleOauthRedirect(@Req() req: Req, @Res() res: Res): void {
+    const parsedUrl = parseUrl(req.url, true);
+    const code = parsedUrl.query.code as string;
+    const state = parsedUrl.query.state as string;
+
+    console.log({ parsedUrl, code, state });
+
+    if (state.length === 0) {
+      req.query.state = 'initial';
+    }
 
-    // installer.handleCallback(req, res);
+    const parsedUrl2 = parseUrl(req.url, true);
+    const code2 = parsedUrl.query.code as string;
+    const state2 = parsedUrl.query.state as string;
+    console.log({ parsedUrl2, code2, state2 });
 
-    return '';
+    this.installer.handleCallback(req, res);
+    // this.installer.handleCallback(req, res, {
+    //   success: (installation, metadata, req, res) => {},
+    //   failure: (error, installOptions, req, res) => {},
+    // });
   }
 
 }