How to get id_token from passport-google-oauth20 package - NestJs - nestjs

Question

I am new to NestJs and trying to implement Google Sign in using passport-google-oauth20 package. I have followed that blog to implement google sign in. Through this package I am able to successfully signed-in and able to get access_token but I need id_token instead of access_token. I dug into the passport-google-oauth20 Strategy class and there I can see different overloaded constructors where one overloaded constructor contains params argument of type GoogleCallbackParameters which contains optional id_token field. But don't know how to make that constructor called. Tried different ways but with no success. :(
Below is my code,
import { Injectable } from "#nestjs/common";
import { PassportStrategy } from "#nestjs/passport";
import { Request } from "express";
import { Profile } from "passport";
import {
GoogleCallbackParameters,
Strategy,
VerifyCallback,
} from "passport-google-oauth20";
import { googleStrategy } from "src/utils/constants";
#Injectable()
export class GoogleStrategy extends PassportStrategy(Strategy, "google") {
constructor() {
super({
clientID:
process.env.BACKEND_ENV === "dev"
? googleStrategy.GOOGLE_CLIENT_ID
: process.env.GOOGLE_CLIENT_ID,
clientSecret:
process.env.BACKEND_ENV === "dev"
? googleStrategy.GOOGLE_CLIENT_SECRET
: process.env.GOOGLE_CLIENT_SECRET,
callbackURL:
process.env.BACKEND_ENV === "dev"
? googleStrategy.GOOGLE_CALLBACK_URL
: process.env.GOOGLE_CALLBACK_URL,
scope: ["email", "profile", "openid"],
passReqToCallback: true,
});
}
async validate(
req: Request,
accessToken: string,
refreshToken: string,
params: GoogleCallbackParameters,
profile: Profile,
done: VerifyCallback,
): Promise<any> {
const { name, emails, photos } = profile;
const user = {
email: emails[0].value,
firstName: name.givenName,
lastName: name.familyName,
picture: photos[0].value,
accessToken,
refreshToken,
};
done(null, user);
}
}
As you can see for getting Request, I have mentoned passReqToCallback: true option and in the validate method I am getting the Request object but don't know how to make params of type GoogleCallbackParameters get filled with the required object.
Thanks.

Answer 1

I solved the problem by passing the callback directly in the super method as a second parameter, I do not why in the validate method it does not work, maybe it is a problem of the passportStrategy that uses nestjs.
Something like below works:
#Injectable()
export class GoogleStrategy extends PassportStrategy(Strategy, 'google') {
constructor() {
super(
{
clientID:
process.env.BACKEND_ENV === 'dev'
? googleStrategy.GOOGLE_CLIENT_ID
: process.env.GOOGLE_CLIENT_ID,
clientSecret:
process.env.BACKEND_ENV === 'dev'
? googleStrategy.GOOGLE_CLIENT_SECRET
: process.env.GOOGLE_CLIENT_SECRET,
callbackURL:
process.env.BACKEND_ENV === 'dev'
? googleStrategy.GOOGLE_CALLBACK_URL
: process.env.GOOGLE_CALLBACK_URL,
scope: ['email', 'profile', 'openid'],
passReqToCallback: true,
},
async (
req: Request,
accessToken: string,
refreshToken: string,
params: GoogleCallbackParameters,
profile: Profile,
done: VerifyCallback,
): Promise<any> => {
const { name, emails, photos } = profile;
const user = {
email: emails[0].value,
firstName: name.givenName,
lastName: name.familyName,
picture: photos[0].value,
accessToken,
refreshToken,
};
done(null, user);
},
);
}
}