Add Profile Builder Login form.

src/php/Main.php

@@ -417,6 +417,9 @@ public function print_inline_styles() {
 			.elementor-field-type-hcaptcha .h-captcha {
 				margin-bottom: unset;
 			}
+			#wppb-loginform .h-captcha {
+				margin-bottom: 14px;
+			}
 			div[style*="z-index: 2147483647"] div[style*="border-width: 11px"][style*="position: absolute"][style*="pointer-events: none"] {
 				border-style: none;
 			}
@@ -873,6 +876,11 @@ public function load_modules() {
 				'paid-memberships-pro/paid-memberships-pro.php',
 				PaidMembershipsPro\Login::class,
 			],
+			'Profile Builder Login'             => [
+				[ 'profile_builder_status', 'login' ],
+				'profile-builder/index.php',
+				ProfileBuilder\Login::class,
+			],
 			'Quform'                            => [
 				[ 'quform_status', 'form' ],
 				'quform/quform.php',

src/php/ProfileBuilder/Login.php

@@ -0,0 +1,109 @@
+<?php
+/**
+ * Login class file.
+ *
+ * @package hcaptcha-wp
+ */
+
+namespace HCaptcha\ProfileBuilder;
+
+use HCaptcha\Abstracts\LoginBase;
+use HCaptcha\Helpers\HCaptcha;
+use WP_Error;
+use WP_User;
+
+/**
+ * Class Login.
+ */
+class Login extends LoginBase {
+
+	/**
+	 * Nonce action.
+	 */
+	const ACTION = 'hcaptcha_login';
+
+	/**
+	 * Nonce name.
+	 */
+	const NONCE = 'hcaptcha_login_nonce';
+
+	/**
+	 * Init hooks.
+	 */
+	protected function init_hooks() {
+		parent::init_hooks();
+
+		add_filter( 'wppb_login_form_before_content_output', [ $this, 'add_captcha' ], 10, 2 );
+		add_filter( 'wp_authenticate_user', [ $this, 'verify' ], 10, 2 );
+	}
+
+	/**
+	 * Add captcha.
+	 *
+	 * @param string|mixed $login_form Login form html.
+	 * @param array        $form_args  Form arguments.
+	 *
+	 * @return string|mixed
+	 * @noinspection PhpUnusedParameterInspection
+	 */
+	public function add_captcha( $login_form, array $form_args ) {
+		if ( ! $this->is_login_limit_exceeded() ) {
+			return $login_form;
+		}
+
+		$login_form = (string) $login_form;
+
+		$args = [
+			'action' => self::ACTION,
+			'name'   => self::NONCE,
+			'id'     => [
+				'source'  => HCaptcha::get_class_source( __CLASS__ ),
+				'form_id' => 'login',
+			],
+		];
+
+		$search = '<p class="login-submit">';
+
+		return str_replace( $search, HCaptcha::form( $args ) . $search, $login_form );
+	}
+
+	/**
+	 * Verify 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
+	 * @noinspection PhpUnusedParameterInspection
+	 */
+	public function verify( $user, string $password ) {
+		// phpcs:disable WordPress.Security.NonceVerification.Missing
+		$wppb_login_form_used = isset( $_POST['wppb_login'] ) ?
+			sanitize_text_field( wp_unslash( $_POST['wppb_login'] ) ) :
+			'';
+		// phpcs:enable WordPress.Security.NonceVerification.Missing
+
+		if ( ! $wppb_login_form_used ) {
+			return $user;
+		}
+
+		if ( ! $this->is_login_limit_exceeded() ) {
+			return $user;
+		}
+
+		$error_message = hcaptcha_verify_post(
+			self::NONCE,
+			self::ACTION
+		);
+
+		if ( null === $error_message ) {
+			return $user;
+		}
+
+		$code = array_search( $error_message, hcap_get_error_messages(), true );
+		$code = $code ?: 'fail';
+
+		return new WP_Error( $code, $error_message, 400 );
+	}
+}

src/php/Settings/Integrations.php

@@ -279,6 +279,13 @@ public function init_form_fields() {
 					'login'    => __( 'Login Form', 'hcaptcha-for-forms-and-more' ),
 				],
 			],
+			'profile_builder_status'        => [
+				'label'   => 'Profile Builder',
+				'type'    => 'checkbox',
+				'options' => [
+					'login' => __( 'Login Form', 'hcaptcha-for-forms-and-more' ),
+				],
+			],
 			'quform_status'                 => [
 				'label'   => 'Quform',
 				'type'    => 'checkbox',