feat(integration): ✨ Add Google Sheets integration

apps/builder/libs/google-sheets.ts

@@ -0,0 +1,28 @@
+import { Prisma, Credentials as CredentialsFromDb } from 'db'
+import { OAuth2Client, Credentials } from 'google-auth-library'
+import prisma from './prisma'
+
+export const oauth2Client = new OAuth2Client(
+  process.env.GOOGLE_CLIENT_ID,
+  process.env.GOOGLE_CLIENT_SECRET,
+  `${process.env.NEXTAUTH_URL}/api/credentials/google-sheets/callback`
+)
+
+export const getAuthenticatedGoogleClient = async (
+  userId: string,
+  credentialsId: string
+): Promise<OAuth2Client> => {
+  const credentials = (await prisma.credentials.findFirst({
+    where: { id: credentialsId, ownerId: userId },
+  })) as CredentialsFromDb
+  oauth2Client.setCredentials(credentials.data as Credentials)
+  oauth2Client.on('tokens', updateTokens(credentialsId))
+  return oauth2Client
+}
+
+const updateTokens =
+  (credentialsId: string) => async (credentials: Credentials) =>
+    prisma.credentials.update({
+      where: { id: credentialsId },
+      data: { data: credentials as Prisma.InputJsonValue },
+    })