Fix error when hCaptcha is disabled for standard login but enabled fo…

…r LearnPress login.

readme.txt

@@ -627,6 +627,7 @@ Instructions for popular native integrations are below:
 * Fixed scrolling to the message on the General page.
 * Fixed fatal error during integration installation in some cases.
 * Fixed the Integrations page when active plugin was deleted.
+* Fixed error when hCaptcha is disabled for standard login but enabled for LearnPress login.
 * Fixed error when hCaptcha is disabled for standard login but enabled for Tutor login.
 
 = 4.9.0 =

src/php/LearnPress/Login.php

@@ -8,6 +8,9 @@
 namespace HCaptcha\LearnPress;
 
 use HCaptcha\Abstracts\LoginBase;
+use HCaptcha\Helpers\HCaptcha;
+use WP_Error;
+use WP_User;
 
 /**
  * Class Login.
@@ -23,7 +26,7 @@ protected function init_hooks(): void {
 		parent::init_hooks();
 
 		add_action( 'login_form', [ $this, 'add_captcha' ] );
-		add_filter( 'wp_authenticate_user', [ $this, 'login_base_verify' ], PHP_INT_MAX, 2 );
+		add_filter( 'wp_authenticate_user', [ $this, 'verify' ], 10, 2 );
 	}
 
 	/**
@@ -38,4 +41,30 @@ public function add_captcha(): void {
 
 		parent::add_captcha();
 	}
+
+	/**
+	 * Verify a login form.
+	 *
+	 * @param WP_User|WP_Error $user     WP_User or WP_Error object
+	 *                                   if a previous callback failed authentication.
+	 * @param string           $password Password to check against the user.
+	 *
+	 * @return WP_User|WP_Error
+	 */
+	public function verify( $user, string $password ) {
+		if ( ! $this->is_learn_press_form() ) {
+			return $user;
+		}
+
+		return $this->login_base_verify( $user, $password );
+	}
+
+	/**
+	 * Whether we process the Learn Press login form.
+	 *
+	 * @return bool
+	 */
+	private function is_learn_press_form(): bool {
+		return HCaptcha::did_filter( 'learnpress_login_credentials' );
+	}
 }

src/php/LearnPress/Register.php

@@ -67,6 +67,7 @@ public function add_hcaptcha(): void {
 	 * Verify hCaptcha.
 	 *
 	 * @return void
+	 * @noinspection PhpUndefinedFunctionInspection
 	 */
 	public function verify(): void {
 		$action = 'learn-press-register';