<?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);
		$class = $r->getClosureScopeClass()?->name;
		if (str_ends_with($r->name, '}')) {
			return $closure;

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

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

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

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• [F] ArrayList.php
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• [F] Arrays.php
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• [F] Callback.php
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• [F] DateTime.php
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• [F] exceptions.php
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• [F] FileInfo.php
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• [F] FileSystem.php
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• [F] Finder.php
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• [F] ImageType.php
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• [F] Iterables.php
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• [F] Json.php
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• [F] ObjectHelpers.php
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• [F] Paginator.php
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• [F] Random.php
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• [F] Reflection.php
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• [F] ReflectionMethod.php
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About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard