From a2222fab08677e5f49a64248373f2bfe4f0d1fe7 Mon Sep 17 00:00:00 2001
From: Yukai Huang <yukaihuangtw@gmail.com>
Date: Thu, 2 Mar 2023 22:32:54 +0800
Subject: [PATCH] feat: handle install and oauth event

---
 .env.example                      |  2 ++
 lib/config.ts                     |  2 ++
 lib/slackApp/index.ts             |  7 ++++---
 pages/api/slack/_app.ts           |  3 ++-
 pages/api/slack/install.ts        | 18 ++++++++++++++++++
 pages/api/slack/oauth_redirect.ts | 18 ++++++++++++++++++
 6 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100644 pages/api/slack/install.ts
 create mode 100644 pages/api/slack/oauth_redirect.ts

diff --git a/.env.example b/.env.example
index a7f02b9..3cc0fc5 100644
--- a/.env.example
+++ b/.env.example
@@ -6,6 +6,8 @@ SLACK_DEV_MODE=false
 SLACK_STATE_SECRET=ZpfmpL2LWpMnbnsP4RGpLAY2dFirKNiv2dC/LtNGv8g=
 SLACK_CLIENT_ID=
 SLACK_CLIENT_SECRET=
+SLACK_REDIRECT_URI=https://localhost:3000/api/slack/oauth_redirect
+SLACK_SLASH_COMMAND=/zuzugo
 
 TARGET_URL=
 ZUZUGO_API_SECRET=
diff --git a/lib/config.ts b/lib/config.ts
index 5b03930..b7a726b 100644
--- a/lib/config.ts
+++ b/lib/config.ts
@@ -45,6 +45,8 @@ export const config = {
   slackClientId: process.env.SLACK_CLIENT_ID,
   slackClientSecret: process.env.SLACK_CLIENT_SECRET,
   slackStateSecret: process.env.SLACK_STATE_SECRET,
+  slackRedirectUri: process.env.SLACK_REDIRECT_URI,
+  slackSlashCommand: process.env.SLACK_SLASH_COMMAND,
 
   apiSecret,
   tokenLine,
diff --git a/lib/slackApp/index.ts b/lib/slackApp/index.ts
index c9ab42f..9d6fee4 100644
--- a/lib/slackApp/index.ts
+++ b/lib/slackApp/index.ts
@@ -15,7 +15,7 @@ const installationStore = new PrismaInstallationStore({
 });
 
 export function setupSlackApp(setupApp: (app: App) => void) {
-  const isDevMode = config.enableSocketModeForDev;
+  const isDevMode = config.slackDevMode;
 
   if (isDevMode) {
     console.log(
@@ -25,15 +25,16 @@ export function setupSlackApp(setupApp: (app: App) => void) {
 
   const baseAppOptions: AppOptions = {
     logLevel: LogLevel.DEBUG,
-    token: config.slackBotToken,
     signingSecret: config.slackSigningSecret,
     clientId: config.slackClientId,
     clientSecret: config.slackClientSecret,
-    scopes: ["commands", "chat:write"],
+    stateSecret: config.slackStateSecret,
+    scopes: ["commands", "chat:write", "incoming-webhook"],
     installerOptions: {
       directInstall: true,
     },
     installationStore,
+    redirectUri: config.slackRedirectUri,
   };
 
   // before start
diff --git a/pages/api/slack/_app.ts b/pages/api/slack/_app.ts
index 03852b8..77e6739 100644
--- a/pages/api/slack/_app.ts
+++ b/pages/api/slack/_app.ts
@@ -1,8 +1,9 @@
+import { config } from "@/lib/config";
 import { setupSlackApp } from "@/lib/slackApp";
 export { appRunner } from "@/lib/slackApp";
 
 setupSlackApp((app) => {
-  app.command("/zuzugo", async ({ ack, command, say, client }) => {
+  app.command(config.slackSlashCommand || "/zuzugo", async ({ ack, command, say, client }) => {
     console.log(command.text);
 
     await client.chat.postMessage({
diff --git a/pages/api/slack/install.ts b/pages/api/slack/install.ts
new file mode 100644
index 0000000..689fab3
--- /dev/null
+++ b/pages/api/slack/install.ts
@@ -0,0 +1,18 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+
+import { appRunner } from "./_app";
+
+import { config as applicationConfig } from "@/lib/config";
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  if (req.method !== "GET") {
+    res.status(405).json({ error: "Sorry! This endpoint does not accept your requests." });
+    return;
+  }
+
+  if (applicationConfig.slackDevMode) {
+    return res.status(200).json({ ok: true });
+  } else {
+    await appRunner?.handleInstallPath(req, res);
+  }
+}
diff --git a/pages/api/slack/oauth_redirect.ts b/pages/api/slack/oauth_redirect.ts
new file mode 100644
index 0000000..c9f994d
--- /dev/null
+++ b/pages/api/slack/oauth_redirect.ts
@@ -0,0 +1,18 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+
+import { appRunner } from "./_app";
+
+import { config } from "@/lib/config";
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  if (req.method !== "GET") {
+    res.status(405).json({ error: "Sorry! This endpoint does not accept your requests." });
+    return;
+  }
+
+  if (config.slackDevMode) {
+    return res.status(200).json({ ok: true });
+  } else {
+    await appRunner?.handleCallback(req, res);
+  }
+}