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<?php |
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/** |
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* Retry-After response body mirror. |
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* |
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* @package WCPOS\WooCommercePOS\Sync |
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*/ |
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|
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namespace WCPOS\WooCommercePOS\Sync; |
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|
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use WCPOS\WooCommercePOS\API as Root_API; |
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use WP_HTTP_Response; |
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use WP_REST_Request; |
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|
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/** Mirrors Retry-After into WCPOS REST error bodies. */ |
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final class Retry_After_Mirror { |
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/** Register the response filter once. */ |
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public static function register_hooks(): void { |
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if ( false === has_filter( 'rest_post_dispatch', array( self::class, 'filter_response' ) ) ) { |
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add_filter( 'rest_post_dispatch', array( self::class, 'filter_response' ), PHP_INT_MAX - 2, 3 ); |
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} |
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} |
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|
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/** |
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* Normalize delay-seconds or an HTTP-date to whole seconds. |
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* |
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* @param string $value Retry-After header value. |
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* @param int|null $now Current Unix timestamp. |
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*/ |
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public static function seconds_from_header( string $value, ?int $now = null ): ?int { |
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if ( 1 === preg_match( '/^[0-9]+$/D', $value ) ) { |
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$digits = ltrim( $value, '0' ); |
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$digits = '' === $digits ? '0' : $digits; |
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if ( strlen( $digits ) > strlen( (string) PHP_INT_MAX ) || ( strlen( $digits ) === strlen( (string) PHP_INT_MAX ) && strcmp( $digits, (string) PHP_INT_MAX ) > 0 ) ) { |
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return null; |
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} |
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return (int) $digits; |
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} |
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$target = strtotime( $value ); |
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if ( false === $target || ! in_array( $value, array( gmdate( 'D, d M Y H:i:s \G\M\T', $target ), gmdate( 'l, d-M-y H:i:s \G\M\T', $target ), gmdate( 'D M j H:i:s Y', $target ), gmdate( 'D M j H:i:s Y', $target ) ), true ) ) { |
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return null; |
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} |
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return max( 0, (int) ceil( $target - ( $now ?? time() ) ) ); |
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} |
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|
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/** |
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* Mirror Retry-After for WCPOS error responses. |
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* |
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* @param mixed $response REST response. |
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* @param mixed $server REST server. |
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* @param WP_REST_Request $request REST request. |
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* |
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* @return mixed |
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*/ |
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public static function filter_response( $response, $server, WP_REST_Request $request ) { |
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$route = strtolower( '/' . ltrim( $request->get_route(), '/' ) ); |
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if ( ! $response instanceof WP_HTTP_Response || $response->get_status() < 400 || ! self::is_wcpos_request( $request, $route ) ) { |
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return $response; |
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} |
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$data = $response->get_data(); |
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$headers = array_change_key_case( $response->get_headers(), CASE_LOWER ); |
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if ( ! is_array( $data ) ) { |
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return $response; |
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} |
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if ( |
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! isset( $headers['retry-after'] ) |
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&& 503 === $response->get_status() |
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&& 'wcpos_sync_unavailable' === ( $data['code'] ?? null ) |
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&& Health::RETRY_AFTER_SECONDS === ( $data['data']['retry_after_seconds'] ?? null ) |
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) { |
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$response->header( 'Retry-After', (string) Health::RETRY_AFTER_SECONDS ); |
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return $response; |
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} |
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if ( ! isset( $headers['retry-after'] ) ) { |
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return $response; |
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} |
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if ( ! isset( $data['data'] ) ) { |
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$data['data'] = array(); |
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} |
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if ( ! is_array( $data['data'] ) || array_key_exists( 'retry_after_seconds', $data['data'] ) ) { |
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return $response; |
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} |
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$seconds = self::seconds_from_header( (string) $headers['retry-after'] ); |
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if ( null !== $seconds ) { |
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$data['data']['retry_after_seconds'] = $seconds; |
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$response->set_data( $data ); |
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} |
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return $response; |
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} |
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/** |
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* Whether this is a WCPOS namespace route or explicitly marked request. |
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* |
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* @param WP_REST_Request $request REST request. |
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* @param string $route Normalized REST route. |
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*/ |
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private static function is_wcpos_request( WP_REST_Request $request, string $route ): bool { |
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foreach ( Root_API::ROUTE_NAMESPACES as $namespace ) { |
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if ( 0 === strpos( $route, '/' . strtolower( $namespace ) . '/' ) ) { |
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return true; |
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} |
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} |
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return '1' === trim( (string) $request->get_header( 'X-WCPOS' ) ); |
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} |
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} |
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|
