Added an basic form to add Google Authenticator.

src/Validator/Constraints/ValidGoogleAuthCodeValidator.php

@@ -0,0 +1,65 @@
+<?php
+
+
+namespace App\Validator\Constraints;
+
+
+use App\Entity\UserSystem\User;
+use Scheb\TwoFactorBundle\Security\TwoFactor\Provider\Google\GoogleAuthenticator;
+use Symfony\Component\Form\Form;
+use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+class ValidGoogleAuthCodeValidator extends ConstraintValidator
+{
+
+    protected $googleAuthenticator;
+
+    public function __construct(GoogleAuthenticator $googleAuthenticator)
+    {
+        $this->googleAuthenticator = $googleAuthenticator;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof ValidGoogleAuthCode) {
+            throw new UnexpectedTypeException($constraint, ValidGoogleAuthCode::class);
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!\is_string($value)) {
+            throw new UnexpectedValueException($value, 'string');
+        }
+
+        if(!ctype_digit($value)) {
+            $this->context->addViolation('validator.google_code.only_digits_allowed');
+        }
+
+        //Number must have 6 digits
+        if(strlen($value) !== 6) {
+            $this->context->addViolation('validator.google_code.wrong_digit_count');
+        }
+
+        //Try to retrieve the user we want to check
+        if($this->context->getObject() instanceof FormInterface &&
+            $this->context->getObject()->getParent() instanceof FormInterface
+        && $this->context->getObject()->getParent()->getData() instanceof User) {
+            $user = $this->context->getObject()->getParent()->getData();
+
+            //Check if the given code is valid
+            if(!$this->googleAuthenticator->checkCode($user, $value)) {
+                $this->context->addViolation('validator.google_code.wrong_code');
+            }
+
+        }
+    }
+}