urn;
		}

		if ( ! Helper::is_post_indexable( $post_id ) ) {
			return;
		}

		// Check if it's a hidden product.
		if ( 'product' === $post->post_type && Helper::is_woocommerce_active() ) {
			$product = wc_get_product( $post_id );
			if ( $product && ! $product->is_visible() ) {
				return;
			}
		}

		$url = get_permalink( $post );
		if ( 'trash' === $post->post_status ) {
			$url = $this->previous_post_permalinks[ $post_id ];
		}

		/**
		 * Filter the URL to be submitted to IndexNow.
		 * Returning false will prevent the URL from being submitted.
		 *
		 * @param string  $url  URL to be submitted.
		 * @param WP_POST $post Post object.
		 */
		$send_url = $this->do_filter( 'instant_indexing/publish_url', $url, $post );

		// Early exit if filter is set to false.
		if ( ! $send_url ) {
			return;
		}

		$this->api_submit( $send_url, false );
		$this->submitted[] = $post_id;
	}

	/**
	 * Is module configured.
	 *
	 * @return boolean
	 */
	private function is_configured() {
		return (bool) Helper::get_settings( 'instant_indexing.indexnow_api_key' );
	}

	/**
	 * Enqueue CSS & JS.
	 *
	 * @param string $hook Page hook name.
	 * @return void
	 */
	public function enqueue( $hook ) {
		if ( 'rank-math_page_rank-math-options-instant-indexing' !== $hook && 'rank-math_page_instant-indexing' !== $hook ) {
			return;
		}

		$uri = untrailingslashit( plugin_dir_url( __FILE__ ) );
		wp_enqueue_script( 'rank-math-instant-indexing', $uri . '/assets/js/instant-indexing.js', [ 'jquery' ], rank_math()->version, true );
		Helper::add_json(
			'indexNow',
			[
				'restUrl'                => rest_url( \RankMath\Rest\Rest_Helper::BASE . '/in' ),
				'refreshHistoryInterval' => 30000,
				'i18n'                   => [
					'submitError'       => esc_html__( 'An error occurred while submitting the URL.', 'rank-math' ),
					'clearHistoryError' => esc_html__( 'Error: could not clear history.', 'rank-math' ),
					'getHistoryError'   => esc_html__( 'Error: could not get history.', 'rank-math' ),
					'noHistory'         => esc_html__( 'No submissions yet.', 'rank-math' ),
				],
			]
		);
	}

	/**
	 * Serve API key for search engines.
	 */
	public function serve_api_key() {
		global $wp;

		$api          = Api::get();
		$key          = $api->get_key();
		$key_location = $api->get_key_location( 'serve_api_key' );
		$current_url  = home_url( $wp->request );

		if ( isset( $current_url ) && $key_location === $current_url ) {
			header( 'Content-Type: text/plain' );
			header( 'X-Robots-Tag: noindex' );
			status_header( 200 );
			echo esc_html( $key );

			exit();
		}
	}

	/**
	 * Submit URL to IndexNow API.
	 *
	 * @param string $url                  URL to be submitted.
	 * @param bool   $is_manual_submission Whether the URL is submitted manually by the user.
	 *
	 * @return bool
	 */
	private function api_submit( $url, $is_manual_submission ) {
		$api = Api::get();

		/**
		 * Filter the URL to be submitted to IndexNow.
		 * Returning false will prevent the URL from being submitted.
		 *
		 * @param bool   $is_manual_submission Whether the URL is submitted manually by the user.
		 */
		$url = $this->do_filter( 'instant_indexing/submit_url', $url, $is_manual_submission );
		if ( ! $url ) {
			return false;
		}

		$api_logs = $api->get_log();
		if ( ! $is_manual_submission && ! empty( $api_logs ) ) {
			$logs = array_values( array_reverse( $api_logs ) );
			if ( ! empty( $logs[0] ) && $logs[0]['url'] === $url && time() - $logs[0]['time'] < self::THROTTLE_LIMIT ) {
				return false;
			}
		}

		$submitted = $api->submit( $url, $is_manual_submission );

		if ( ! $is_manual_submission ) {
			return $submitted;
		}

		$count = is_array( $url ) ? count( $url ) : 1;
		$this->add_submit_message_notice( $submitted, $count );

		return $submitted;
	}

	/**
	 * Add notice after submitting one or more URLs.
	 *
	 * @param bool $success Whether the submission was successful.
	 * @param int  $count   Number of submitted URLs.
	 *
	 * @return void
	 */
	private function add_submit_message_notice( $success, $count ) {
		$notification_type    = 'error';
		$notification_message = __( 'Error submitting page to IndexNow.', 'rank-math' );

		if ( $success ) {
			$notification_type    = 'success';
			$notification_message = sprintf(
				/* translators: %s: Number of pages submitted. */
				_n( '%s page submitted to IndexNow.', '%s pages submitted to IndexNow.', $count, 'rank-math' ),
				$count
			);
		}

		Helper::add_notification( $notification_message, [ 'type' => $notification_type ] );
	}

	/**
	 * Get post types where auto-submit is enabled.
	 *
	 * @return array
	 */
	private function get_auto_submit_post_types() {
		$post_types = Helper::get_settings( 'instant_indexing.bing_post_types', [] );
		return $post_types;
	}

}