From 33717ceb303f3092ad3fe1c1e4526d869447c13c Mon Sep 17 00:00:00 2001
From: Martin McKeaveney <martinmckeaveney@gmail.com>
Date: Sun, 24 Apr 2022 23:32:47 +0100
Subject: [PATCH] auto fetch access token in gsheets integration

---
 packages/backend-core/src/db/utils.js         |  1 +
 .../middleware/passport/datasource/google.js  | 17 ++++--
 .../server/src/integrations/googlesheets.ts   | 54 ++++++++++++++++---
 3 files changed, 62 insertions(+), 10 deletions(-)

diff --git a/packages/backend-core/src/db/utils.js b/packages/backend-core/src/db/utils.js
index feb17c4129..b0b7794096 100644
--- a/packages/backend-core/src/db/utils.js
+++ b/packages/backend-core/src/db/utils.js
@@ -460,3 +460,4 @@ exports.getConfigParams = getConfigParams
 exports.getScopedFullConfig = getScopedFullConfig
 exports.generateNewUsageQuotaDoc = generateNewUsageQuotaDoc
 exports.generateDevInfoID = generateDevInfoID
+exports.getPlatformUrl = getPlatformUrl
diff --git a/packages/backend-core/src/middleware/passport/datasource/google.js b/packages/backend-core/src/middleware/passport/datasource/google.js
index 5046815b1f..ff305b01b3 100644
--- a/packages/backend-core/src/middleware/passport/datasource/google.js
+++ b/packages/backend-core/src/middleware/passport/datasource/google.js
@@ -2,7 +2,7 @@ const google = require("../google")
 const { Cookies, Configs } = require("../../../constants")
 const { clearCookie, getCookie } = require("../../../utils")
 const { getDB } = require("../../../db")
-const { getScopedConfig } = require("../../../db/utils")
+const { getScopedConfig, getPlatformUrl } = require("../../../db/utils")
 const environment = require("../../../environment")
 const { getGlobalDB } = require("../../../tenancy")
 
@@ -21,10 +21,20 @@ async function fetchGoogleCreds() {
   return config
 }
 
+async function platformUrl() {
+  const db = getGlobalDB()
+  const publicConfig = await getScopedConfig(db, {
+    type: Configs.SETTINGS,
+  })
+  return getPlatformUrl(publicConfig)
+}
+
 async function preAuth(passport, ctx, next) {
   // get the relevant config
   const googleConfig = await fetchGoogleCreds()
-  let callbackUrl = `${environment.PLATFORM_URL}/api/global/auth/datasource/google/callback`
+  const platUrl = await platformUrl()
+
+  let callbackUrl = `${platUrl}/api/global/auth/datasource/google/callback`
   const strategy = await google.strategyFactory(googleConfig, callbackUrl)
 
   if (!ctx.query.appId || !ctx.query.datasourceId) {
@@ -41,8 +51,9 @@ async function preAuth(passport, ctx, next) {
 async function postAuth(passport, ctx, next) {
   // get the relevant config
   const config = await fetchGoogleCreds()
+  const platUrl = await platformUrl()
 
-  let callbackUrl = `${environment.PLATFORM_URL}/api/global/auth/datasource/google/callback`
+  let callbackUrl = `${platUrl}/api/global/auth/datasource/google/callback`
   const strategy = await google.strategyFactory(
     config,
     callbackUrl,
diff --git a/packages/server/src/integrations/googlesheets.ts b/packages/server/src/integrations/googlesheets.ts
index c58fdea551..f6d800da7a 100644
--- a/packages/server/src/integrations/googlesheets.ts
+++ b/packages/server/src/integrations/googlesheets.ts
@@ -10,6 +10,7 @@ import { Table, TableSchema } from "../definitions/common"
 import { buildExternalTableId } from "./utils"
 import { DataSourceOperation, FieldTypes } from "../constants"
 import { GoogleSpreadsheet } from "google-spreadsheet"
+import fetch from "node-fetch"
 import env from "../environment"
 
 module GoogleSheetsModule {
@@ -28,6 +29,16 @@ module GoogleSheetsModule {
     refreshToken: string
   }
 
+  interface AuthTokenRequest {
+    client_id: string
+    client_secret: string
+    refresh_token: string
+  }
+
+  interface AuthTokenResponse {
+    access_token: string
+  }
+
   const SCHEMA: Integration = {
     plus: true,
     auth: {
@@ -40,6 +51,7 @@ module GoogleSheetsModule {
     friendlyName: "Google Sheets",
     datasource: {
       spreadsheetId: {
+        display: "Google Sheet URL",
         type: DatasourceFieldTypes.STRING,
         required: true,
       },
@@ -135,6 +147,30 @@ module GoogleSheetsModule {
       return parts.length > 5 ? parts[5] : spreadsheetId
     }
 
+    async fetchAccessToken(
+      payload: AuthTokenRequest
+    ): Promise<AuthTokenResponse> {
+      const response = await fetch(
+        "https://www.googleapis.com/oauth2/v4/token",
+        {
+          method: "POST",
+          body: JSON.stringify({
+            ...payload,
+            grant_type: "refresh_token",
+          }),
+          headers: {
+            "Content-Type": "application/json",
+          },
+        }
+      )
+
+      if (response.status !== 200) {
+        throw new Error("Error authenticating with google sheets.")
+      }
+
+      return response.json()
+    }
+
     async connect() {
       try {
         // Initialise oAuth client
@@ -154,14 +190,18 @@ module GoogleSheetsModule {
           clientId: googleConfig.clientID,
           clientSecret: googleConfig.clientSecret,
         })
-        oauthClient.on("tokens", tokens => {
-          oauthClient.setCredentials({
-            refresh_token: googleConfig.refreshToken,
-            access_token: tokens.access_token,
-          })
+
+        const tokenResponse = await this.fetchAccessToken({
+          client_id: googleConfig.clientID,
+          client_secret: googleConfig.clientSecret,
+          refresh_token: this.config.auth.refreshToken,
         })
-        oauthClient.credentials.access_token = this.config.auth.accessToken
-        oauthClient.credentials.refresh_token = this.config.auth.refreshToken
+
+        oauthClient.setCredentials({
+          refresh_token: this.config.auth.refreshToken,
+          access_token: tokenResponse.access_token,
+        })
+
         this.client.useOAuth2Client(oauthClient)
         await this.client.loadInfo()
       } catch (err) {