# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function
## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place
Related PR https://github.com/twentyhq/twenty/pull/9941
Our tests on FE are red, which is a threat to code quality. I'm adding a
few unit tests to improve the coverage and lowering a bit the lines
coverage threshold
Signing in is a two steps process:
- Checking if the user email is already used
- Checking if the email + password is correct
Those two steps need a captchaToken to be valid. Unfortunately, from
Cloudflare Turnstile doc:
`A token can only be validated once and cannot be consumed twice. Once a
token has been issued, it can be validated within the next 300 seconds.
After 300 seconds, the token is no longer valid and another challenge
needs to be solved`
So we need to generate a new token at each step instead of re-using the
same
## Description
This PR adds recaptcha on login form. One can add any one of three
recaptcha vendor -
1. Google Recaptcha -
https://developers.google.com/recaptcha/docs/v3#programmatically_invoke_the_challenge
2. HCaptcha -
https://docs.hcaptcha.com/invisible#programmatically-invoke-the-challenge
3. Turnstile -
https://developers.cloudflare.com/turnstile/get-started/client-side-rendering/#execution-modes
### Issue
- #3546
### Environment variables -
1. `CAPTCHA_DRIVER` - `google-recaptcha` | `hcaptcha` | `turnstile`
2. `CAPTCHA_SITE_KEY` - site key
3. `CAPTCHA_SECRET_KEY` - secret key
### Engineering choices
1. If some of the above env variable provided, then, backend generates
an error -
<img width="990" alt="image"
src="https://github.com/twentyhq/twenty/assets/60139930/9fb00fab-9261-4ff3-b23e-2c2e06f1bf89">
Please note that login/signup form will keep working as expected.
2. I'm using a Captcha guard that intercepts the request. If
"captchaToken" is present in the body and all env is set, then, the
captcha token is verified by backend through the service.
3. One can use this guard on any resolver to protect it by the captcha.
4. On frontend, two hooks `useGenerateCaptchaToken` and
`useInsertCaptchaScript` is created. `useInsertCaptchaScript` adds the
respective captcha JS script on frontend. `useGenerateCaptchaToken`
returns a function that one can use to trigger captcha token generation
programatically. This allows one to generate token keeping recaptcha
invisible.
### Note
This PR contains some changes in unrelated files like indentation,
spacing, inverted comma etc. I ran "yarn nx fmt:fix twenty-front" and
"yarn nx lint twenty-front -- --fix".
### Screenshots
<img width="869" alt="image"
src="https://github.com/twentyhq/twenty/assets/60139930/a75f5677-9b66-47f7-9730-4ec916073f8c">
---------
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>
Co-authored-by: Charles Bochet <charles@twenty.com>
