Lovable and Google Classroom integration: Step-by-Step Guide 2025

 

Setting Up Google Developer Credentials

 

• Create a project at the Google Developers Console (https://console.developers.google.com/) and enable the Google Classroom API.
• Generate OAuth 2.0 credentials (Client ID and Client Secret) from the Credentials section.
• Since Lovable does not have a terminal, you must store these credentials directly in your code (or in a configuration file). Create a new file called googleConfig.ts in your project and add the following:

export const googleConfig = {
  clientId: "YOURCLIENTID_HERE",
  clientSecret: "YOURCLIENTSECRET_HERE",
  redirectUri: "YOURREDIRECTURI_HERE" // e.g., "https://your-lovable-app.com/auth/google/callback"
};

• Replace YOURCLIENTIDHERE, YOURCLIENTSECRETHERE, and YOURREDIRECTURI_HERE with your actual credentials.

 

Adding Dependencies in Code

 

• Lovable does not have a terminal, so to use external libraries like googleapis, you should add the dependency information in your project’s configuration file. If your project has a package.json file or similar configuration file, include the dependency as follows. If not, you may need to create this file in the root folder:

{
  "dependencies": {
    "googleapis": "^100.0.0"
  }
}

• This tells your Lovable project to use the googleapis library. Lovable will read this configuration and load the dependency accordingly.

 

Creating the Google Authentication File

 

• Create a new file in your project called googleAuth.ts. This file will handle OAuth authentication and interactions with the Google Classroom API.
• Add the following TypeScript code snippet to googleAuth.ts:

import { google, oauth2_v2 } from "googleapis";
import { googleConfig } from "./googleConfig";

// Create an OAuth2 client with the given credentials
const oauth2Client = new google.auth.OAuth2(
  googleConfig.clientId,
  googleConfig.clientSecret,
  googleConfig.redirectUri
);

/**
- Generate a URL that asks permissions for Classroom scopes.
 */
export const getAuthUrl = (): string => {
  const scopes = [
    "https://www.googleapis.com/auth/classroom.courses.readonly",
    "https://www.googleapis.com/auth/classroom.rosters.readonly"
  ];

  const authUrl = oauth2Client.generateAuthUrl({
    access_type: "offline",
    scope: scopes
  });

  return authUrl;
};

/**
- Exchange the authorization code for tokens.
- @param code The authorization code returned from Google after user consent.
 */
export const getTokens = async (code: string) => {
  const { tokens } = await oauth2Client.getToken(code);
  oauth2Client.setCredentials(tokens);
  return tokens;
};

/**
- Example function to list Google Classroom courses.
 */
export const listCourses = async () => {
  const classroom = google.classroom({ version: "v1", auth: oauth2Client });
  const res = await classroom.courses.list();
  return res.data.courses;
};

• This code sets up the OAuth2 client, provides functions to generate the auth URL, exchange the code for tokens, and query the Google Classroom API (here, listing courses).

 

Integrating Google Authentication with Lovable

 

• Within Lovable, locate your main application file (for example, app.ts or the file where you handle routes).
• Import the functions from googleAuth.ts and add routes to handle authentication. For instance, add the following code snippet in the appropriate place:

import express from "express";
import { getAuthUrl, getTokens, listCourses } from "./googleAuth";

const app = express();

// Route to start the Google OAuth process
app.get("/auth/google", (req, res) => {
  const authUrl = getAuthUrl();
  res.redirect(authUrl);
});

// Google OAuth callback route
app.get("/auth/google/callback", async (req, res) => {
  const code = req.query.code as string;
  if (!code) {
    return res.status(400).send("No code provided.");
  }
  try {
    // Exchange authorization code for tokens
    await getTokens(code);
    // Optionally, you can now call Google Classroom API functions. For example, listing courses:
    const courses = await listCourses();
    res.json({ courses });
  } catch (error) {
    console.error("Error during Google authentication:", error);
    res.status(500).send("Authentication failed");
  }
});

// Start your server (adjust host/port as needed by Lovable)
app.listen(3000, () => {
  console.log("Server running on port 3000");
});

• Ensure that your Lovable project routes match the above example or adjust them accordingly. Insert these code snippets into your main server initialization file.

 

Testing the Integration

 

• To test the integration, open your web browser and navigate to https://your-lovable-app.com/auth/google (adjust the domain and port as necessary).
• You will be redirected to Google’s authentication page. After consenting, Google will redirect back to your callback route, which will exchange the code for tokens and list your courses as a JSON response.
• If everything works correctly, you should see your Google Classroom courses.