plugin install

wp/wp-content/plugins/gravityforms/includes/duplicate-submissions/class-gf-duplicate-submissions-handler.php

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+<?php
+/**
+ * Handles logic for duplicate submission prevention services.
+ *
+ * @package Gravity_Forms\Gravity_Forms\Duplicate_Submissions
+ */
+
+namespace Gravity_Forms\Gravity_Forms\Duplicate_Submissions;
+
+/**
+ * Class GF_Duplicate_Submissions_Handler
+ *
+ * @since 2.9.1
+ *
+ * Provides functionality for handling duplicate submissions while avoiding multiple
+ * entries being submitted.
+ */
+class GF_Duplicate_Submissions_Handler {
+
+	/**
+	 * The URL parameter used for redirect protection in Safari.
+	 */
+	const SAFARI_REDIRECT_PARAM = 'gf_protect_submission';
+
+	/**
+	 * The base URL for this plugin
+	 *
+	 * @var string $base_url.
+	 */
+	private $base_url;
+
+	/**
+	 * GF_Duplicate_Submissions_Handler constructor.
+	 *
+	 * @param string $base_url The Base URL for this Plugin.
+	 */
+	public function __construct( $base_url ) {
+		$this->base_url = $base_url;
+	}
+
+	/**
+	 * Returns true if duplicate submission protection is enabled. false otherwise.
+	 *
+	 * @returns bool $is_enabled true if duplicate protection is active/enabled. false otherwise
+	 */
+	public function is_enabled() {
+
+		$form_id = filter_input( INPUT_POST, 'gform_submit', FILTER_SANITIZE_NUMBER_INT );
+
+		if ( empty( $form_id ) ) {
+			return false;
+		}
+
+		/**
+		 * Allows users to disable duplicate submissions protection, either globally
+		 * or on a form-by-form basis.
+		 *
+		 * @since 2.5.15
+		 *
+		 * @param bool       Passes a false value by default.
+		 * @param int|string Passes the current form ID.
+		 */
+		$is_disabled = gf_apply_filters( array( 'gform_is_disabled_duplicate_submissions_protection', $form_id ), false, $form_id );
+
+		return ! $is_disabled;
+
+	}
+
+	/**
+	 * Enqueue the JS file if this is a form submission configured for duplicate protection.
+	 */
+	public function maybe_enqueue_scripts() {
+
+		if ( $this->is_enabled() ) {
+			$min = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG || isset( $_GET['gform_debug'] ) ? '' : '.min';
+			wp_enqueue_script( 'gform_duplicate_submissions', $this->base_url . "/js/duplicate-submissions{$min}.js", array(), true );
+			wp_localize_script( 'gform_duplicate_submissions', 'gf_duplicate_submissions', $this->get_localized_script_data() );
+		}
+	}
+
+	/**
+	 * Get the correct data to localize to the JS file.
+	 *
+	 * @return array
+	 */
+	private function get_localized_script_data() {
+		return array(
+			'is_gf_submission'      => (int) $this->is_valid_submission(),
+			'safari_redirect_param' => self::SAFARI_REDIRECT_PARAM,
+		);
+	}
+
+	/**
+	 * Check if the current submission exists, and is valid.
+	 *
+	 * @return bool
+	 */
+	private function is_valid_submission() {
+		$form_id = filter_input( INPUT_POST, 'gform_submit', FILTER_SANITIZE_NUMBER_INT );
+
+		if ( empty( $form_id ) || ! class_exists( '\GFFormDisplay' ) ) {
+			return false;
+		}
+
+		$entry_id = rgars( \GFFormDisplay::$submission, $form_id . '/lead/id' );
+
+		if ( empty( $entry_id ) ) {
+			return false;
+		}
+
+		\GFCommon::log_debug( __METHOD__ . sprintf( '(): form #%d. entry #%d.', $form_id, $entry_id ) );
+
+		return true;
+	}
+
+	/**
+	 * Redirect to a $_GET request if we detect a dupe submission from Safari.
+	 */
+	public function maybe_handle_safari_redirect() {
+		if ( rgget( self::SAFARI_REDIRECT_PARAM ) != '1' || ! $this->is_enabled() ) {
+			return;
+		}
+
+		// Get the submission URL from the $_SERVER, and strip out our redirect param.
+		$submission_url = filter_input( INPUT_SERVER, 'HTTP_REFERER', FILTER_SANITIZE_URL );
+		$base_url       = esc_url( remove_query_arg( self::SAFARI_REDIRECT_PARAM, $submission_url ) );
+
+		// Redirect to the form's page URL as a GET request.
+		wp_safe_redirect( $base_url, 303 );
+		exit;
+	}
+}

wp/wp-content/plugins/gravityforms/includes/duplicate-submissions/class-gf-duplicate-submissions-service-provider.php

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+<?php
+/**
+ * Service Provider for Duplicate Submission Service
+ *
+ * @package Gravity_Forms\Gravity_Forms\Duplicate_Submissions
+ */
+
+namespace Gravity_Forms\Gravity_Forms\Duplicate_Submissions;
+
+use Gravity_Forms\Gravity_Forms\GF_Service_Container;
+use Gravity_Forms\Gravity_Forms\GF_Service_Provider;
+use Gravity_Forms\Gravity_Forms\Util\GF_Util_Service_Provider;
+
+/**
+ * Class GF_License_Service_Provider
+ *
+ * Service provider for the Duplicate Submission Service.
+ */
+class GF_Duplicate_Submissions_Service_Provider extends GF_Service_Provider {
+
+	const GF_DUPLICATE_SUBMISSION_HANDLER = 'gf_duplicate_submission_handler';
+
+	/**
+	 * Includes all related files and adds all containers.
+	 *
+	 * @param GF_Service_Container $container Container singleton object.
+	 */
+	public function register( GF_Service_Container $container ) {
+		\GFForms::include_gravity_api();
+
+		require_once plugin_dir_path( __FILE__ ) . 'class-gf-duplicate-submissions-handler.php';
+
+		$container->add(
+			self::GF_DUPLICATE_SUBMISSION_HANDLER,
+			function () {
+				return new GF_Duplicate_Submissions_Handler( \GFCommon::get_base_url() );
+			}
+		);
+	}
+
+	/**
+	 * Initializes service.
+	 *
+	 * @param GF_Service_Container $container Service Container.
+	 */
+	public function init( GF_Service_Container $container ) {
+		parent::init( $container );
+
+		$duplicate_submission_handler = $container->get( self::GF_DUPLICATE_SUBMISSION_HANDLER );
+
+		add_action( 'gform_enqueue_scripts', array( $duplicate_submission_handler, 'maybe_enqueue_scripts' ) );
+		add_action( 'wp_loaded', array( $duplicate_submission_handler, 'maybe_handle_safari_redirect' ), 8, 0 );
+	}
+}