<?php declare(strict_types=1);
/*
 * This file is part of sebastian/recursion-context.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\RecursionContext;

use const PHP_INT_MAX;
use const PHP_INT_MIN;
use function array_key_exists;
use function array_pop;
use function array_slice;
use function count;
use function is_array;
use function is_object;
use function random_int;
use function spl_object_hash;
use SplObjectStorage;

/**
 * A context containing previously processed arrays and objects
 * when recursively processing a value.
 */
final class Context
{
    /**
     * @var array[]
     */
    private $arrays;

    /**
     * @var SplObjectStorage
     */
    private $objects;

    /**
     * Initialises the context.
     */
    public function __construct()
    {
        $this->arrays  = [];
        $this->objects = new SplObjectStorage;
    }

    /**
     * @codeCoverageIgnore
     */
    public function __destruct()
    {
        foreach ($this->arrays as &$array) {
            if (is_array($array)) {
                array_pop($array);
                array_pop($array);
            }
        }
    }

    /**
     * Adds a value to the context.
     *
     * @param array|object $value the value to add
     *
     * @throws InvalidArgumentException Thrown if $value is not an array or object
     *
     * @return bool|int|string the ID of the stored value, either as a string or integer
     *
     * @psalm-template T
     * @psalm-param T $value
     * @param-out T $value
     */
    public function add(&$value)
    {
        if (is_array($value)) {
            return $this->addArray($value);
        }

        if (is_object($value)) {
            return $this->addObject($value);
        }

        throw new InvalidArgumentException(
            'Only arrays and objects are supported'
        );
    }

    /**
     * Checks if the given value exists within the context.
     *
     * @param array|object $value the value to check
     *
     * @throws InvalidArgumentException Thrown if $value is not an array or object
     *
     * @return false|int|string the string or integer ID of the stored value if it has already been seen, or false if the value is not stored
     *
     * @psalm-template T
     * @psalm-param T $value
     * @param-out T $value
     */
    public function contains(&$value)
    {
        if (is_array($value)) {
            return $this->containsArray($value);
        }

        if (is_object($value)) {
            return $this->containsObject($value);
        }

        throw new InvalidArgumentException(
            'Only arrays and objects are supported'
        );
    }

    /**
     * @return bool|int
     */
    private function addArray(array &$array)
    {
        $key = $this->containsArray($array);

        if ($key !== false) {
            return $key;
        }

        $key            = count($this->arrays);
        $this->arrays[] = &$array;

        if (!array_key_exists(PHP_INT_MAX, $array) && !array_key_exists(PHP_INT_MAX - 1, $array)) {
            $array[] = $key;
            $array[] = $this->objects;
        } else { /* cover the improbable case too */
            /* Note that array_slice (used in containsArray) will return the
             * last two values added *not necessarily* the highest integer
             * keys in the array, so the order of these writes to $array
             * is important, but the actual keys used is not. */
            do {
                $key = random_int(PHP_INT_MIN, PHP_INT_MAX);
            } while (array_key_exists($key, $array));

            $array[$key] = $key;

            do {
                $key = random_int(PHP_INT_MIN, PHP_INT_MAX);
            } while (array_key_exists($key, $array));

            $array[$key] = $this->objects;
        }

        return $key;
    }

    /**
     * @param object $object
     */
    private function addObject($object): string
    {
        if (!$this->objects->contains($object)) {
            $this->objects->attach($object);
        }

        return spl_object_hash($object);
    }

    /**
     * @return false|int
     */
    private function containsArray(array &$array)
    {
        $end = array_slice($array, -2);

        return isset($end[1]) && $end[1] === $this->objects ? $end[0] : false;
    }

    /**
     * @param object $value
     *
     * @return false|string
     */
    private function containsObject($value)
    {
        if ($this->objects->contains($value)) {
            return spl_object_hash($value);
        }

        return false;
    }
}

• [F] Context.php
  Delete
• [F] Exception.php
  Delete
• [F] InvalidArgumentException.php
  Delete

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

Easily save your credit and debit card details within our app for quick and secure transactions. This feature ensures that your payment information is protected with advanced encryption and can be used for future purchases with just a tap.

Effortless Money Transfers

Transfer funds quickly and securely between users with our streamlined money transfer service. Simply select the recipient, enter the amount, and authorize the transaction for instant, hassle-free transfers.

Merchant Account Setup

Activate your merchant account effortlessly to start receiving payments. Our intuitive setup process ensures that you can begin accepting transactions smoothly, helping your business thrive with minimal setup time.

Real-Time Transaction Tracking

Keep track of all your transactions in real time through our app. Monitor payment statuses, view transaction history, and manage your account efficiently, ensuring complete control over your financial activities.

Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.