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<?php
declare( strict_types = 1 );

namespace Automattic\WooCommerce\Internal\Logging;

use Automattic\WooCommerce\Utilities\FeaturesUtil;
use Automattic\WooCommerce\Utilities\StringUtil;
use Automattic\WooCommerce\Internal\McStats;
use Jetpack_Options;
use WC_Rate_Limiter;
use WC_Log_Levels;
use WC_Site_Tracking;

/**
 * WooCommerce Remote Logger
 *
 * The WooCommerce remote logger class adds functionality to log WooCommerce errors remotely based on if the customer opted in and several other conditions.
 *
 * No personal information is logged, only error information and relevant context.
 *
 * @class RemoteLogger
 * @since 9.2.0
 * @package WooCommerce\Classes
 */
class RemoteLogger extends \WC_Log_Handler {

const LOG_ENDPOINT             = 'https://public-api.wordpress.com/rest/v1.1/logstash';
	const RATE_LIMIT_ID            = 'woocommerce_remote_logging';
	const RATE_LIMIT_DELAY         = 60; // 1 minute.
	const WC_NEW_VERSION_TRANSIENT = 'woocommerce_new_version';

/**
	 * Handle a log entry.
	 *
	 * @param int    $timestamp Log timestamp.
	 * @param string $level emergency|alert|critical|error|warning|notice|info|debug.
	 * @param string $message Log message.
	 * @param array  $context Additional information for log handlers.
	 *
	 * @throws \Exception If the remote logging fails. The error is caught and logged locally.
	 *
	 * @return bool False if value was not handled and true if value was handled.
	 */
	public function handle( $timestamp, $level, $message, $context ) {
		try {
			if ( ! $this->should_handle( $level, $message, $context ) ) {
				return false;
			}

return $this->log( $level, $message, $context );
		} catch ( \Throwable $e ) {
			// Log the error to the local logger so we can investigate.
			SafeGlobalFunctionProxy::wc_get_logger()->error( 'Failed to handle the log: ' . $e->getMessage(), array( 'source' => 'remote-logging' ) );
			return false;
		}
	}

/**
	 * Get formatted log data to be sent to the remote logging service.
	 *
	 * This method formats the log data by sanitizing the message, adding default fields, and including additional context
	 * such as backtrace, tags, and extra attributes. It also integrates with WC_Tracks to include blog and store details.
	 * The formatted log data is then filtered before being sent to the remote logging service.
	 *
	 * @param string $level   Log level (e.g., 'error', 'warning', 'info').
	 * @param string $message Log message to be recorded.
	 * @param array  $context Optional. Additional information for log handlers, such as 'backtrace', 'tags', 'extra', and 'error'.
	 *
	 * @return array Formatted log data ready to be sent to the remote logging service.
	 */
	public function get_formatted_log( $level, $message, $context = array() ) {
		$log_data = array(
			// Default fields.
			'feature'    => 'woocommerce_core',
			'severity'   => $level,
			'message'    => $this->sanitize( $message ),
			'host'       => SafeGlobalFunctionProxy::wp_parse_url( SafeGlobalFunctionProxy::home_url(), PHP_URL_HOST ) ?? 'Unable to retrieve host',
			'tags'       => array( 'woocommerce', 'php' ),
			'properties' => array(
				'wc_version'  => $this->get_wc_version(),
				'php_version' => phpversion(),
				'wp_version'  => SafeGlobalFunctionProxy::get_bloginfo( 'version' ) ?? 'Unable to retrieve wp version',
				'request_uri' => $this->sanitize_request_uri( filter_input( INPUT_SERVER, 'REQUEST_URI', FILTER_SANITIZE_URL ) ),
				'store_id'    => SafeGlobalFunctionProxy::get_option( \WC_Install::STORE_ID_OPTION, null ) ?? 'Unable to retrieve store id',
			),
		);

$blog_id = class_exists( 'Jetpack_Options' ) ? Jetpack_Options::get_option( 'id' ) : null;

if ( ! empty( $blog_id ) && is_int( $blog_id ) ) {
			$log_data['blog_id'] = $blog_id;
		}

if ( isset( $context['backtrace'] ) ) {
			if ( is_array( $context['backtrace'] ) || is_string( $context['backtrace'] ) ) {
				$log_data['trace'] = $this->sanitize_trace( $context['backtrace'] );
			} elseif ( true === $context['backtrace'] ) {
				$log_data['trace'] = $this->sanitize_trace( self::get_backtrace() );
			}
			unset( $context['backtrace'] );
		}

if ( isset( $context['tags'] ) && is_array( $context['tags'] ) ) {
			$log_data['tags'] = array_merge( $log_data['tags'], $context['tags'] );
			unset( $context['tags'] );
		}

if ( isset( $context['error']['file'] ) && is_string( $context['error']['file'] ) && '' !== $context['error']['file'] ) {
			$log_data['file'] = $this->normalize_paths( $context['error']['file'] );
			unset( $context['error']['file'] );
		}

$extra_attrs = $context['extra'] ?? array();
		unset( $context['extra'] );
		unset( $context['remote-logging'] );

// Merge the extra attributes with the remaining context since we can't send arbitrary fields to Logstash.
		$log_data['extra'] = array_merge( $extra_attrs, $context );

/**
		 * Filters the formatted log data before sending it to the remote logging service.
		 * Returning a non-array value will prevent the log from being sent.
		 *
		 * @since 9.2.0
		 *
		 * @param array  $log_data The formatted log data.
		 * @param string $level    The log level (e.g., 'error', 'warning').
		 * @param string $message  The log message.
		 * @param array  $context  The original context array.
		 *
		 * @return array The filtered log data.
		 */
		return apply_filters( 'woocommerce_remote_logger_formatted_log_data', $log_data, $level, $message, $context );
	}

/**
	 * Determines if remote logging is allowed based on the following conditions:
	 *
	 * 1. The feature flag for remote error logging is enabled.
	 * 2. The user has opted into tracking/logging.
	 * 3. The store is allowed to log based on the variant assignment percentage.
	 * 4. The current WooCommerce version is the latest so we don't log errors that might have been fixed in a newer version.
	 *
	 * @return bool
	 */
	public function is_remote_logging_allowed() {
		if ( ! FeaturesUtil::feature_is_enabled( 'remote_logging' ) ) {
			return false;
		}

if ( ! WC_Site_Tracking::is_tracking_enabled() ) {
			return false;
		}

if ( ! $this->should_current_version_be_logged() ) {
			return false;
		}

return true;
	}

/**
	 * Determine whether to handle or ignore log.
	 *
	 * @param string $level emergency|alert|critical|error|warning|notice|info|debug.
	 * @param string $message Log message to be recorded.
	 * @param array  $context Additional information for log handlers.
	 *
	 * @return bool True if the log should be handled.
	 */
	protected function should_handle( $level, $message, $context ) {
		// Ignore logs that are not opted in for remote logging.
		if ( ! isset( $context['remote-logging'] ) || false === $context['remote-logging'] ) {
			return false;
		}

if ( ! $this->is_remote_logging_allowed() ) {
			return false;
		}

if ( $this->is_third_party_error( (string) $message, (array) $context ) ) {
			return false;
		}

// Record fatal error stats.
		if ( WC_Log_Levels::get_level_severity( $level ) >= WC_Log_Levels::get_level_severity( WC_Log_Levels::CRITICAL ) ) {
			try {
				$mc_stats = wc_get_container()->get( McStats::class );
				$mc_stats->add( 'error', 'critical-errors' );
				$mc_stats->do_server_side_stats();
			} catch ( \Throwable $e ) {
				error_log( 'Warning: Failed to record fatal error stats: ' . $e->getMessage() ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
			}
		}

if ( WC_Rate_Limiter::retried_too_soon( self::RATE_LIMIT_ID ) ) {
			// Log locally that the remote logging is throttled.
			SafeGlobalFunctionProxy::wc_get_logger()->warning( 'Remote logging throttled.', array( 'source' => 'remote-logging' ) );
			return false;
		}

return true;
	}

/**
	 * Send the log to the remote logging service.
	 *
	 * @param string $level   Log level (e.g., 'error', 'warning', 'info').
	 * @param string $message Log message to be recorded.
	 * @param array  $context Optional. Additional information for log handlers, such as 'backtrace', 'tags', 'extra', and 'error'.
	 *
	 * @throws \Exception|\Error If the remote logging fails. The error is caught and logged locally.
	 * @return bool
	 */
	private function log( $level, $message, $context ) {
		$log_data = $this->get_formatted_log( $level, $message, $context );

// Ensure the log data is valid.
		if ( ! is_array( $log_data ) || empty( $log_data['message'] ) || empty( $log_data['feature'] ) ) {
			return false;
		}

$body = SafeGlobalFunctionProxy::wp_json_encode( array( 'params' => SafeGlobalFunctionProxy::wp_json_encode( $log_data ) ) );
		if ( is_null( $body ) ) { // if the json encoding fails the API will reject the API call so let's not bother.
			throw new \Error( 'Remote Logger encountered error while attempting to JSON encode $log_data' );
		}

WC_Rate_Limiter::set_rate_limit( self::RATE_LIMIT_ID, self::RATE_LIMIT_DELAY );

if ( $this->is_dev_or_local_environment() ) {
			return false;
		}

$response = SafeGlobalFunctionProxy::wp_safe_remote_post(
			self::LOG_ENDPOINT,
			array(
				'body'     => $body,
				'timeout'  => 3,
				'headers'  => array(
					'Content-Type' => 'application/json',
				),
				'blocking' => false,
			)
		);

if ( is_null( $response ) ) { // SafeGlobalFunctionProxy will return a null if an error occurs within, so there will be a separate log entry with the details.
			SafeGlobalFunctionProxy::wc_get_logger()->error( 'Failed to call wp_safe_remote_post while sending the log to the remote logging service.', array( 'source' => 'remote-logging' ) );
			return false;
		}

$is_api_call_error = SafeGlobalFunctionProxy::is_wp_error( $response );

if ( $is_api_call_error ) {
			SafeGlobalFunctionProxy::wc_get_logger()->error( 'Failed to send the log to the remote logging service: ' . $response->get_error_message(), array( 'source' => 'remote-logging' ) );
			return false;
		} elseif ( is_null( $is_api_call_error ) ) {
			SafeGlobalFunctionProxy::wc_get_logger()->error( 'Failed to parse the response after sending log to the remote logging service. ', array( 'source' => 'remote-logging' ) );
			return false;
		}
		return true;
	}

/**
	 * Check if the current WooCommerce version is the latest.
	 *
	 * @return bool
	 */
	private function should_current_version_be_logged() {
		$new_version = SafeGlobalFunctionProxy::get_site_transient( self::WC_NEW_VERSION_TRANSIENT ) ?? '';

if ( false === $new_version ) {
			$new_version = $this->fetch_new_woocommerce_version();
			// Cache the new version for a week since we want to keep logging in with the same version for a while even if the new version is available.
			SafeGlobalFunctionProxy::set_site_transient( self::WC_NEW_VERSION_TRANSIENT, $new_version, WEEK_IN_SECONDS );
		}

if ( ! is_string( $new_version ) || '' === $new_version ) {
			// If the new version is not available, we consider the current version to be the latest.
			return true;
		}

// If the current version is the latest, we don't want to log errors.
		return version_compare( $this->get_wc_version(), $new_version, '>=' );
	}

/**
	 * Get the current WooCommerce version reliably through a series of fallbacks
	 *
	 * @return string The current WooCommerce version.
	 */
	private function get_wc_version() {
		if ( class_exists( '\Automattic\Jetpack\Constants' ) && method_exists( '\Automattic\Jetpack\Constants', 'get_constant' ) ) {
			$wc_version = \Automattic\Jetpack\Constants::get_constant( 'WC_VERSION' );
			if ( $wc_version ) {
				return $wc_version;
			}
		}

if ( defined( 'WC_VERSION' ) ) {
			return WC_VERSION;
		}

if ( function_exists( 'WC' ) ) {
			return WC()->version;
		}

// Return null since none of the above worked.
		return null;
	}

/**
	 * Check if the error exclusively contains third-party stack frames for fatal-errors source context.
	 *
	 * @param string $message The error message.
	 * @param array  $context The error context.
	 *
	 * @return bool
	 */
	protected function is_third_party_error( string $message, array $context ): bool {
		// Only check for fatal-errors source context.
		if ( ! isset( $context['source'] ) || 'fatal-errors' !== $context['source'] ) {
			return false;
		}

$wc_plugin_dir = StringUtil::normalize_local_path_slashes( WC_ABSPATH );

// Check if the error message contains the WooCommerce plugin directory.
		if ( str_contains( $message, $wc_plugin_dir ) ) {
			return false;
		}

// Without a backtrace, it's impossible to ascertain if the error is third-party. To avoid logging numerous irrelevant errors, we'll consider it a third-party error and ignore it.
		if ( isset( $context['backtrace'] ) && is_array( $context['backtrace'] ) ) {
			$wp_includes_dir = StringUtil::normalize_local_path_slashes( ABSPATH . WPINC );
			$wp_admin_dir    = StringUtil::normalize_local_path_slashes( ABSPATH . 'wp-admin' );

// Find the first relevant frame that is not from WordPress core and not empty.
			$relevant_frame = null;
			foreach ( $context['backtrace'] as $frame ) {
				if ( empty( $frame ) || ! is_string( $frame ) ) {
					continue;
				}

// Skip frames from WordPress core.
				if ( strpos( $frame, $wp_includes_dir ) !== false || strpos( $frame, $wp_admin_dir ) !== false ) {
					continue;
				}

$relevant_frame = $frame;
				break;
			}

// Check if the relevant frame is from WooCommerce.
			if ( $relevant_frame && strpos( $relevant_frame, $wc_plugin_dir ) !== false ) {
				return false;
			}
		}

if ( ! function_exists( 'apply_filters' ) ) {
			require_once ABSPATH . WPINC . '/plugin.php';
		}
		/**
		 * Filter to allow other plugins to overwrite the result of the third-party error check for remote logging.
		 *
		 * @since 9.2.0
		 *
		 * @param bool   $is_third_party_error The result of the third-party error check.
		 * @param string $message              The error message.
		 * @param array  $context              The error context.
		 */
		return apply_filters( 'woocommerce_remote_logging_is_third_party_error', true, $message, $context );
	}

/**
	 * Fetch the new version of WooCommerce from the WordPress API.
	 *
	 * @return string|null New version if an update is available, null otherwise.
	 */
	private function fetch_new_woocommerce_version() {
		$plugin_updates = SafeGlobalFunctionProxy::get_plugin_updates();

// Check if WooCommerce plugin update information is available.
		if ( ! is_array( $plugin_updates ) || ! isset( $plugin_updates[ WC_PLUGIN_BASENAME ] ) ) {
			return null;
		}

$wc_plugin_update = $plugin_updates[ WC_PLUGIN_BASENAME ];

// Ensure the update object exists and has the required information.
		if ( ! $wc_plugin_update || ! isset( $wc_plugin_update->update->new_version ) ) {
			return null;
		}

$new_version = $wc_plugin_update->update->new_version;
		return is_string( $new_version ) ? $new_version : null;
	}

/**
	 * Sanitize the content to exclude sensitive data.
	 *
	 * The trace is sanitized by:
	 *
	 * 1. Remove the absolute path to the plugin directory based on WC_ABSPATH. This is more accurate than using WP_PLUGIN_DIR when the plugin is symlinked.
	 * 2. Remove the absolute path to the WordPress root directory.
	 * 3. Redact potential user data such as email addresses and phone numbers.
	 *
	 * For example, the trace:
	 *
	 * /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-remote-logger.php on line 123
	 * will be sanitized to: **\/woocommerce/includes/class-wc-remote-logger.php on line 123
	 *
	 * Additionally, any user data like email addresses or phone numbers will be redacted.
	 *
	 * @param string $content The content to sanitize.
	 *
	 * @return string The sanitized content.
	 */
	private function sanitize( $content ) {
		if ( ! is_string( $content ) ) {
			return $content;
		}

$sanitized = $this->normalize_paths( $content );
		$sanitized = $this->redact_user_data( $sanitized );

if ( ! function_exists( 'apply_filters' ) ) {
			require_once ABSPATH . WPINC . '/plugin.php';
		}

/**
		 * Filter the sanitized log content before it's sent to the remote logging service.
		 *
		 * @since 9.5.0
		 *
		 * @param string $sanitized The sanitized content.
		 * @param string $content The original content.
		 */
		return apply_filters( 'woocommerce_remote_logger_sanitized_content', $sanitized, $content );
	}

/**
	 * Normalize file paths by replacing absolute paths with relative ones.
	 *
	 * @param string $content The content containing paths to normalize.
	 *
	 * @return string The content with normalized paths.
	 */
	private function normalize_paths( string $content ): string {
		$plugin_path = StringUtil::normalize_local_path_slashes( trailingslashit( dirname( WC_ABSPATH ) ) );
		$wp_path     = StringUtil::normalize_local_path_slashes( trailingslashit( ABSPATH ) );

return str_replace(
			array( $plugin_path, $wp_path ),
			array( './', './' ),
			$content
		);
	}

/**
	 * Sanitize the error trace to exclude sensitive data.
	 *
	 * @param array|string $trace The error trace.
	 * @return string The sanitized trace.
	 */
	private function sanitize_trace( $trace ): string {
		if ( is_string( $trace ) ) {
			return $this->sanitize( $trace );
		}

if ( ! is_array( $trace ) ) {
			return '';
		}

$sanitized_trace = array_map(
			function ( $trace_item ) {
				if ( is_array( $trace_item ) && isset( $trace_item['file'] ) ) {
					$trace_item['file'] = $this->sanitize( $trace_item['file'] );
					return $trace_item;
				}

return $this->sanitize( $trace_item );
			},
			$trace
		);

$is_array_by_file = isset( $sanitized_trace[0]['file'] );
		if ( $is_array_by_file ) {
			return SafeGlobalFunctionProxy::wc_print_r( $sanitized_trace, true );
		}

return implode( "\n", $sanitized_trace );
	}

/**
	 * Redact potential user data from the content.
	 *
	 * @param string $content The content to redact.
	 * @return string The redacted message.
	 */
	private function redact_user_data( $content ) {
		// Redact email addresses.
		$content = preg_replace( '/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/', '[redacted_email]', $content );

// Redact potential IP addresses.
		$content = preg_replace( '/\b(?:\d{1,3}\.){3}\d{1,3}\b/', '[redacted_ip]', $content );

// Redact potential credit card numbers.
		$content = preg_replace( '/(\d{4}[- ]?){3}\d{4}/', '[redacted_credit_card]', $content );

// API key redaction patterns.
		$api_patterns = array(
			'/\b[A-Za-z0-9]{32,40}\b/',                // Generic API key.
			'/\b[0-9a-f]{32}\b/i',                     // 32 hex characters.
			'/\b(?:[A-Z0-9]{4}-){3,7}[A-Z0-9]{4}\b/i', // Segmented API key (e.g., XXXX-XXXX-XXXX-XXXX).
			'/\bsk_[A-Za-z0-9]{24,}\b/i',              // Stripe keys (starts with sk_).
		);

foreach ( $api_patterns as $pattern ) {
			$content = preg_replace( $pattern, '[redacted_api_key]', $content );
		}

/**
		 * Redact potential phone numbers.
		 *
		 * This will match patterns like:
		 * +1 (123) 456 7890 (with parentheses around area code)
		 * +44-123-4567-890 (with area code, no parentheses)
		 * 1234567890 (10 consecutive digits, no area code)
		 * (123) 456-7890 (area code in parentheses, groups)
		 * +91 12345 67890 (international format with space)
		 */
		$content = preg_replace(
			'/(?:(?:\+?\d{1,3}[-\s]?)?$?\d{3}$?[-\s]?\d{3}[-\s]?\d{4}|\b\d{10,11}\b)/',
			'[redacted_phone]',
			$content
		);

return $content;
	}

/**
	 * Check if the current environment is development or local.
	 *
	 * Creates a helper method so we can easily mock this in tests.
	 *
	 * @return bool
	 */
	protected function is_dev_or_local_environment() {
		return in_array( SafeGlobalFunctionProxy::wp_get_environment_type() ?? 'production', array( 'development', 'local' ), true );
	}
	/**
	 * Sanitize the request URI to only allow certain query parameters.
	 *
	 * @param string $request_uri The request URI to sanitize.
	 * @return string The sanitized request URI.
	 */
	private function sanitize_request_uri( $request_uri ) {
		$default_whitelist = array(
			'path',
			'page',
			'step',
			'task',
			'tab',
			'section',
			'status',
			'post_type',
			'taxonomy',
			'action',
		);

/**
		 * Filter to allow other plugins to whitelist request_uri query parameter values for unmasked remote logging.
		 *
		 * @since 9.4.0
		 *
		 * @param string   $default_whitelist The default whitelist of query parameters.
		 */
		$whitelist = apply_filters( 'woocommerce_remote_logger_request_uri_whitelist', $default_whitelist );

$parsed_url = SafeGlobalFunctionProxy::wp_parse_url( $request_uri );
		if ( ! is_array( $parsed_url ) || ! isset( $parsed_url['query'] ) ) {
			return $request_uri;
		}

parse_str( $parsed_url['query'], $query_params );

foreach ( $query_params as $key => &$value ) {
			if ( ! in_array( $key, $whitelist, true ) ) {
				$value = 'xxxxxx';
			}
		}

$parsed_url['query'] = http_build_query( $query_params );
		return $this->build_url( $parsed_url );
	}

/**
	 * Build a URL from its parsed components.
	 *
	 * @param array $parsed_url The parsed URL components.
	 * @return string The built URL.
	 */
	private function build_url( $parsed_url ) {
		$path     = $parsed_url['path'] ?? '';
		$query    = isset( $parsed_url['query'] ) ? "?{$parsed_url['query']}" : '';
		$fragment = isset( $parsed_url['fragment'] ) ? "#{$parsed_url['fragment']}" : '';

return "$path$query$fragment";
	}
}

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Name	Size	Perms	Modified	Actions
OrderLogsCleanupHelper.php	7.24 KB	lrw-r--r--	2026-05-05 14:26:50	Edit Download recursive recursive
OrderLogsDeletionProcessor.php	7.09 KB	lrw-r--r--	2026-05-05 14:26:50	Edit Download recursive recursive
RemoteLogger.php	20.77 KB	lrw-r--r--	2025-10-06 17:56:06	Edit Download recursive recursive
SafeGlobalFunctionProxy.php	4.26 KB	lrw-r--r--	2024-11-14 01:17:00	Edit Download recursive recursive