gmail-to-exchange365/src/server/googleAuth.ts

Complete Gmail to Exchange 365 migration tool with UI - Migrate emails, attachments, and folders seamlessly

import { google } from "googleapis";

export function getGoogleOAuthClient() {
  return new google.auth.OAuth2(
    process.env.GOOGLE_CLIENT_ID!,
    process.env.GOOGLE_CLIENT_SECRET!,
    process.env.GOOGLE_REDIRECT!
  );
}

export function generateGoogleAuthUrl() {
  const oauth = getGoogleOAuthClient();

  return oauth.generateAuthUrl({
    access_type: "offline",
    prompt: "consent",
    scope: [
      "https://www.googleapis.com/auth/gmail.readonly",
      "https://www.googleapis.com/auth/gmail.labels",
      "email",
      "profile"
    ]
  });
}

export async function exchangeGoogleCode(code: string) {
  const oauth = getGoogleOAuthClient();
  const { tokens } = await oauth.getToken(code);
  return tokens;
}

export function refreshGoogleToken(refreshToken: string) {
  const oauth = getGoogleOAuthClient();
  oauth.setCredentials({ refresh_token: refreshToken });
  return oauth.refreshAccessToken();
}