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<?php /** @noinspection PhpElementIsNotAvailableInCurrentPhpVersionInspection */
namespace RebelCode\Wpra\Core;
use Exception;
use Psr\Log\LogLevel;
use Throwable;
/**
* Handles errors.
*
* @since 4.14
*/
class ErrorHandler
{
/**
* The callback to invoke.
*
* @since 4.14
*
* @var callable
*/
protected $callback;
/*
* The previous exception handler.
*
* @since 4.14
*/
protected $previous;
/**
* The root directory for which to limit exception handling.
*
* @since 4.14
*
* @var string
*/
protected $rootDir;
/**
* Constructor.
*
* @since 4.14
*
* @param string $rootDir The root directory for which to limit exception handling.
* @param callable $callback The callback to invoke when an exception is handled. The callback will receive the
* exception or PHP7 {@see \Throwable} as argument.
*/
public function __construct($rootDir, callable $callback)
{
$this->rootDir = $rootDir;
$this->callback = $callback;
$this->previous = null;
}
/**
* Registers the handler.
*
* @since 4.14
*/
public function register()
{
$this->previous = set_exception_handler($this);
}
/**
* De-registers the handler.
*
* @since 4.14
*/
public function deregister()
{
set_exception_handler($this->previous);
}
/**
* @since 4.14
*/
public function __invoke()
{
if ($this->previous) {
call_user_func_array($this->previous, func_get_args());
}
$throwable = func_get_arg(0);
if (!($throwable instanceof Exception) && !($throwable instanceof Throwable)) {
return;
}
if ($this->isErrorFromRootDir($throwable->getFile())) {
$this->handleError($throwable);
return;
}
// Detect an exception thrown from within the root directory
foreach ($throwable->getTrace() as $trace) {
if (array_key_exists('file', $trace) && $this->isErrorFromRootDir($trace['file'])) {
$this->handleError($throwable);
}
}
}
/**
* Checks if an error path is from the root directory.
*
* @since 4.14
*
* @param string $path The path of the error.
*
* @return bool
*/
protected function isErrorFromRootDir($path)
{
return stripos($path, $this->rootDir) === 0;
}
/**
* Handles errors.
*
* @since 4.14
*
* @param Exception|Throwable $throwable
*/
protected function handleError($throwable)
{
// Attempt to log the error
try {
wpra_get_logger()->log(
LogLevel::ERROR,
'Exception: "{msg}", at {file} line {line}',
[
'msg' => $throwable->getMessage(),
'file' => $throwable->getFile(),
'line' => $throwable->getLine(),
]
);
} catch (Exception $exception) {
// Ignore
}
if (defined('REST_REQUEST')) {
wp_send_json_error(['error' => $throwable->getMessage(), 'trace' => $throwable->getTrace()], 500);
return;
}
if (is_callable($this->callback)) {
call_user_func_array($this->callback, [$throwable]);
}
}
}