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Current File : /home/utripoli/www/alqalam/lib/pkp/lib/vendor/nette/utils/src/Utils/Callback.php
<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Utils;

use Nette;
use function is_array, is_object, is_string;


/**
 * PHP callable tools.
 */
final class Callback
{
	use Nette\StaticClass;

	/**
	 * Invokes internal PHP function with own error handler.
	 */
	public static function invokeSafe(string $function, array $args, callable $onError): mixed
	{
		$prev = set_error_handler(function ($severity, $message, $file) use ($onError, &$prev, $function): ?bool {
			if ($file === __FILE__) {
				$msg = ini_get('html_errors')
					? Html::htmlToText($message)
					: $message;
				$msg = preg_replace("#^$function\\(.*?\\): #", '', $msg);
				if ($onError($msg, $severity) !== false) {
					return null;
				}
			}

			return $prev ? $prev(...func_get_args()) : false;
		});

		try {
			return $function(...$args);
		} finally {
			restore_error_handler();
		}
	}


	/**
	 * Checks that $callable is valid PHP callback. Otherwise throws exception. If the $syntax is set to true, only verifies
	 * that $callable has a valid structure to be used as a callback, but does not verify if the class or method actually exists.
	 * @return callable
	 * @throws Nette\InvalidArgumentException
	 */
	public static function check(mixed $callable, bool $syntax = false)
	{
		if (!is_callable($callable, $syntax)) {
			throw new Nette\InvalidArgumentException(
				$syntax
				? 'Given value is not a callable type.'
				: sprintf("Callback '%s' is not callable.", self::toString($callable)),
			);
		}

		return $callable;
	}


	/**
	 * Converts PHP callback to textual form. Class or method may not exists.
	 */
	public static function toString(mixed $callable): string
	{
		if ($callable instanceof \Closure) {
			$inner = self::unwrap($callable);
			return '{closure' . ($inner instanceof \Closure ? '}' : ' ' . self::toString($inner) . '}');
		} else {
			is_callable(is_object($callable) ? [$callable, '__invoke'] : $callable, true, $textual);
			return $textual;
		}
	}


	/**
	 * Returns reflection for method or function used in PHP callback.
	 * @param  callable  $callable  type check is escalated to ReflectionException
	 * @throws \ReflectionException  if callback is not valid
	 */
	public static function toReflection($callable): \ReflectionMethod|\ReflectionFunction
	{
		if ($callable instanceof \Closure) {
			$callable = self::unwrap($callable);
		}

		if (is_string($callable) && str_contains($callable, '::')) {
			return new \ReflectionMethod($callable);
		} elseif (is_array($callable)) {
			return new \ReflectionMethod($callable[0], $callable[1]);
		} elseif (is_object($callable) && !$callable instanceof \Closure) {
			return new \ReflectionMethod($callable, '__invoke');
		} else {
			return new \ReflectionFunction($callable);
		}
	}


	/**
	 * Checks whether PHP callback is function or static method.
	 */
	public static function isStatic(callable $callable): bool
	{
		return is_string(is_array($callable) ? $callable[0] : $callable);
	}


	/**
	 * Unwraps closure created by Closure::fromCallable().
	 */
	public static function unwrap(\Closure $closure): callable|array
	{
		$r = new \ReflectionFunction($closure);
		if (str_ends_with($r->name, '}')) {
			return $closure;

		} elseif ($obj = $r->getClosureThis()) {
			return [$obj, $r->name];

		} elseif ($class = $r->getClosureScopeClass()) {
			return [$class->name, $r->name];

		} else {
			return $r->name;
		}
	}
}

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