create urlverificationlts

packages/slackbot-proxy/src/middlewares/slack-to-growi/url-verification.ts

@@ -0,0 +1,20 @@
+import {
+  IMiddleware, Middleware, Req, Res,
+} from '@tsed/common';
+import { SlackOauthReq } from '~/interfaces/slack-to-growi/slack-oauth-req';
+
+
+@Middleware()
+export class UrlVerificationMiddleware implements IMiddleware {
+
+  async use(@Req() req: SlackOauthReq, @Res() res: Res): Promise<void> {
+
+    // eslint-disable-next-line max-len
+    // see: https://api.slack.com/apis/connections/events-api#the-events-api__subscribing-to-event-types__events-api-request-urls__request-url-configuration--verification
+    if (req.body.type === 'url_verification') {
+      res.send(req.body.challenge);
+      return;
+    }
+  }
+
+}