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<?php declare(strict_types=1); namespace Automattic\WooCommerce\Vendor\GraphQL\Error; use Automattic\WooCommerce\Vendor\GraphQL\Executor\ExecutionResult; use Automattic\WooCommerce\Vendor\GraphQL\Language\Source; use Automattic\WooCommerce\Vendor\GraphQL\Language\SourceLocation; use Automattic\WooCommerce\Vendor\GraphQL\Type\Definition\Type; use Automattic\WooCommerce\Vendor\GraphQL\Utils\Utils; use PHPUnit\Framework\Test; /** * This class is used for [default error formatting](error-handling.md). * It converts PHP exceptions to [spec-compliant errors](https://facebook.github.io/graphql/#sec-Errors) * and provides tools for error debugging. * * @see ExecutionResult * * @phpstan-import-type SerializableError from ExecutionResult * @phpstan-import-type ErrorFormatter from ExecutionResult * * @see \Automattic\WooCommerce\Vendor\GraphQL\Tests\Error\FormattedErrorTest / class FormattedError { private static string $internalErrorMessage = 'Internal server error'; /* * Set default error message for internal errors formatted using createFormattedError(). * This value can be overridden by passing 3rd argument to `createFormattedError()`. * * @api / public static function setInternalErrorMessage(string $msg): void { self::$internalErrorMessage = $msg; } /* * Prints a GraphQLError to a string, representing useful location information * about the error's position in the source. / public static function printError(Error $error): string { $printedLocations = []; $nodes = $error->nodes; if (isset($nodes) && $nodes !== []) { foreach ($nodes as $node) { $location = $node->loc; if (isset($location)) { $source = $location->source; if (isset($source)) { $printedLocations[] = self::highlightSourceAtLocation( $source, $source->getLocation($location->start) ); } } } } elseif ($error->getSource() !== null && $error->getLocations() !== []) { $source = $error->getSource(); foreach ($error->getLocations() as $location) { $printedLocations[] = self::highlightSourceAtLocation($source, $location); } } return $printedLocations === [] ? $error->getMessage() : implode("\n\n", array_merge([$error->getMessage()], $printedLocations)) . "\n"; } /* * Render a helpful description of the location of the error in the Automattic\WooCommerce\Vendor\GraphQL * Source document. / private static function highlightSourceAtLocation(Source $source, SourceLocation $location): string { $line = $location->line; $lineOffset = $source->locationOffset->line - 1; $columnOffset = self::getColumnOffset($source, $location); $contextLine = $line + $lineOffset; $contextColumn = $location->column + $columnOffset; $prevLineNum = (string) ($contextLine - 1); $lineNum = (string) $contextLine; $nextLineNum = (string) ($contextLine + 1); $padLen = strlen($nextLineNum); $lines = Utils::splitLines($source->body); $lines[0] = self::spaces($source->locationOffset->column - 1) . $lines[0]; $outputLines = [ "{$source->name} ({$contextLine}:{$contextColumn})", $line >= 2 ? (self::leftPad($padLen, $prevLineNum) . ': ' . $lines[$line - 2]) : null, self::leftPad($padLen, $lineNum) . ': ' . $lines[$line - 1], self::spaces(2 + $padLen + $contextColumn - 1) . '^', $line < count($lines) ? self::leftPad($padLen, $nextLineNum) . ': ' . $lines[$line] : null, ]; return implode("\n", array_filter($outputLines)); } private static function getColumnOffset(Source $source, SourceLocation $location): int { return $location->line === 1 ? $source->locationOffset->column - 1 : 0; } private static function spaces(int $length): string { return str_repeat(' ', $length); } private static function leftPad(int $length, string $str): string { return self::spaces($length - mb_strlen($str)) . $str; } /* * Convert any exception to a Automattic\WooCommerce\Vendor\GraphQL spec compliant array. * * This method only exposes the exception message when the given exception * implements the ClientAware interface, or when debug flags are passed. * * For a list of available debug flags @see \Automattic\WooCommerce\Vendor\GraphQL\Error\DebugFlag constants. * * @return SerializableError * * @api / public static function createFromException(\Throwable $exception, int $debugFlag = DebugFlag::NONE, ?string $internalErrorMessage = null): array { $internalErrorMessage ??= self::$internalErrorMessage; $message = $exception instanceof ClientAware && $exception->isClientSafe() ? $exception->getMessage() : $internalErrorMessage; $formattedError = ['message' => $message]; if ($exception instanceof Error) { $locations = array_map( static fn (SourceLocation $loc): array => $loc->toSerializableArray(), $exception->getLocations() ); if ($locations !== []) { $formattedError['locations'] = $locations; } if ($exception->path !== null && $exception->path !== []) { $formattedError['path'] = $exception->path; } } if ($exception instanceof ProvidesExtensions) { $extensions = $exception->getExtensions(); if (is_array($extensions) && $extensions !== []) { $formattedError['extensions'] = $extensions; } } if ($debugFlag !== DebugFlag::NONE) { $formattedError = self::addDebugEntries($formattedError, $exception, $debugFlag); } return $formattedError; } /* * Decorates spec-compliant $formattedError with debug entries according to $debug flags. * * @param SerializableError $formattedError * @param int $debugFlag For available flags @see \Automattic\WooCommerce\Vendor\GraphQL\Error\DebugFlag * * @throws \Throwable * * @return SerializableError / public static function addDebugEntries(array $formattedError, \Throwable $e, int $debugFlag): array { if ($debugFlag === DebugFlag::NONE) { return $formattedError; } if (($debugFlag & DebugFlag::RETHROW_INTERNAL_EXCEPTIONS) !== 0) { if (! $e instanceof Error) { throw $e; } if ($e->getPrevious() !== null) { throw $e->getPrevious(); } } $isUnsafe = ! $e instanceof ClientAware \|\| ! $e->isClientSafe(); if (($debugFlag & DebugFlag::RETHROW_UNSAFE_EXCEPTIONS) !== 0 && $isUnsafe && $e->getPrevious() !== null) { throw $e->getPrevious(); } if (($debugFlag & DebugFlag::INCLUDE_DEBUG_MESSAGE) !== 0 && $isUnsafe) { $formattedError['extensions']['debugMessage'] = $e->getMessage(); } if (($debugFlag & DebugFlag::INCLUDE_TRACE) !== 0) { $actualError = $e->getPrevious() ?? $e; if ($e instanceof \ErrorException \|\| $e instanceof \Error) { $formattedError['extensions']['file'] = $e->getFile(); $formattedError['extensions']['line'] = $e->getLine(); } else { $formattedError['extensions']['file'] = $actualError->getFile(); $formattedError['extensions']['line'] = $actualError->getLine(); } $isTrivial = $e instanceof Error && $e->getPrevious() === null; if (! $isTrivial) { $formattedError['extensions']['trace'] = static::toSafeTrace($actualError); } } return $formattedError; } /* * Prepares final error formatter taking in account $debug flags. * * If initial formatter is not set, FormattedError::createFromException is used. * * @phpstan-param ErrorFormatter\|null $formatter / public static function prepareFormatter(?callable $formatter, int $debug): callable { return $formatter === null ? static fn (\Throwable $e): array => static::createFromException($e, $debug) : static fn (\Throwable $e): array => static::addDebugEntries($formatter($e), $e, $debug); } /* * Returns error trace as serializable array. * * @return array<int, array{ * file?: string, * line?: int, * function?: string, * call?: string, * }> * * @api / public static function toSafeTrace(\Throwable $error): array { $trace = $error->getTrace(); if ( isset($trace[0]['function']) && isset($trace[0]['class']) // Remove invariant entries as they don't provide much value: && ($trace[0]['class'] . '::' . $trace[0]['function'] === 'Automattic\WooCommerce\Vendor\GraphQL\Utils\Utils::invariant') ) { array_shift($trace); } elseif (! isset($trace[0]['file'])) { // Remove root call as it's likely error handler trace: array_shift($trace); } $formatted = []; foreach ($trace as $err) { $safeErr = []; if (isset($err['file'])) { $safeErr['file'] = $err['file']; } if (isset($err['line'])) { $safeErr['line'] = $err['line']; } $func = $err['function']; $args = array_map([self::class, 'printVar'], $err['args'] ?? []); $funcStr = $func . '(' . implode(', ', $args) . ')'; if (isset($err['class'])) { $safeErr['call'] = $err['class'] . '::' . $funcStr; } else { $safeErr['function'] = $funcStr; } $formatted[] = $safeErr; } return $formatted; } /* @param mixed $var */ public static function printVar($var): string { if ($var instanceof Type) { return 'GraphQLType: ' . $var->toString(); } if (is_object($var)) { // Calling `count` on instances of `PHPUnit\Framework\Test` triggers an unintended side effect - see https://github.com/sebastianbergmann/phpunit/issues/5866#issuecomment-2172429263 $count = ! $var instanceof Test && $var instanceof \Countable ? '(' . count($var) . ')' : ''; return 'instance of ' . get_class($var) . $count; } if (is_array($var)) { return 'array(' . count($var) . ')'; } if ($var === '') { return '(empty string)'; } if (is_string($var)) { return "'" . addcslashes($var, "'") . "'"; } if (is_bool($var)) { return $var ? 'true' : 'false'; } if (is_scalar($var)) { return (string) $var; } if ($var === null) { return 'null'; } return gettype($var); } }

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