♻️ (viewer) Change to features-centric folder structure

apps/viewer/src/lib/google-sheets.ts

@@ -0,0 +1,48 @@
+import { Credentials as CredentialsFromDb } from 'db'
+import { OAuth2Client, Credentials } from 'google-auth-library'
+import { GoogleSheetsCredentialsData } from 'models'
+import { isDefined } from 'utils'
+import { decrypt, encrypt } from 'utils/api'
+import prisma from './prisma'
+
+export const getAuthenticatedGoogleClient = async (
+  credentialsId: string
+): Promise<OAuth2Client | undefined> => {
+  const credentials = (await prisma.credentials.findFirst({
+    where: { id: credentialsId },
+  })) as CredentialsFromDb | undefined
+  if (!credentials) return
+  const data = decrypt(
+    credentials.data,
+    credentials.iv
+  ) as GoogleSheetsCredentialsData
+
+  const oauth2Client = new OAuth2Client(
+    process.env.GOOGLE_CLIENT_ID,
+    process.env.GOOGLE_CLIENT_SECRET,
+    `${process.env.NEXTAUTH_URL}/api/credentials/google-sheets/callback`
+  )
+  oauth2Client.setCredentials(data)
+  oauth2Client.on('tokens', updateTokens(credentialsId, data))
+  return oauth2Client
+}
+
+const updateTokens =
+  (credentialsId: string, existingCredentials: GoogleSheetsCredentialsData) =>
+  async (credentials: Credentials) => {
+    if (
+      isDefined(existingCredentials.id_token) &&
+      credentials.id_token !== existingCredentials.id_token
+    )
+      return
+    const newCredentials: GoogleSheetsCredentialsData = {
+      ...existingCredentials,
+      expiry_date: credentials.expiry_date,
+      access_token: credentials.access_token,
+    }
+    const { encryptedData, iv } = encrypt(newCredentials)
+    await prisma.credentials.update({
+      where: { id: credentialsId },
+      data: { data: encryptedData, iv },
+    })
+  }