<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Provider\Node;

use Ramsey\Uuid\Exception\NodeException;
use Ramsey\Uuid\Provider\NodeProviderInterface;
use Ramsey\Uuid\Type\Hexadecimal;

use function array_filter;
use function array_map;
use function array_walk;
use function count;
use function ob_get_clean;
use function ob_start;
use function preg_match;
use function preg_match_all;
use function reset;
use function str_contains;
use function str_replace;
use function strtolower;
use function strtoupper;
use function substr;

use const GLOB_NOSORT;
use const PREG_PATTERN_ORDER;

/**
 * SystemNodeProvider retrieves the system node ID, if possible
 *
 * The system node ID, or host ID, is often the same as the MAC address for a
 * network interface on the host.
 */
class SystemNodeProvider implements NodeProviderInterface
{
    /**
     * Pattern to match nodes in ifconfig and ipconfig output.
     */
    private const IFCONFIG_PATTERN = '/[^:]([0-9a-f]{2}([:-])[0-9a-f]{2}(\2[0-9a-f]{2}){4})[^:]/i';

    /**
     * Pattern to match nodes in sysfs stream output.
     */
    private const SYSFS_PATTERN = '/^([0-9a-f]{2}:){5}[0-9a-f]{2}$/i';

    public function getNode(): Hexadecimal
    {
        $node = $this->getNodeFromSystem();

        if ($node === '') {
            throw new NodeException(
                'Unable to fetch a node for this system'
            );
        }

        return new Hexadecimal($node);
    }

    /**
     * Returns the system node, if it can find it
     */
    protected function getNodeFromSystem(): string
    {
        static $node = null;

        if ($node !== null) {
            return (string) $node;
        }

        // First, try a Linux-specific approach.
        $node = $this->getSysfs();

        if ($node === '') {
            // Search ifconfig output for MAC addresses & return the first one.
            $node = $this->getIfconfig();
        }

        $node = str_replace([':', '-'], '', $node);

        return $node;
    }

    /**
     * Returns the network interface configuration for the system
     *
     * @codeCoverageIgnore
     */
    protected function getIfconfig(): string
    {
        $disabledFunctions = strtolower((string) ini_get('disable_functions'));

        if (str_contains($disabledFunctions, 'passthru')) {
            return '';
        }

        /**
         * @psalm-suppress UnnecessaryVarAnnotation
         * @var string $phpOs
         */
        $phpOs = constant('PHP_OS');

        ob_start();
        switch (strtoupper(substr($phpOs, 0, 3))) {
            case 'WIN':
                passthru('ipconfig /all 2>&1');

                break;
            case 'DAR':
                passthru('ifconfig 2>&1');

                break;
            case 'FRE':
                passthru('netstat -i -f link 2>&1');

                break;
            case 'LIN':
            default:
                passthru('netstat -ie 2>&1');

                break;
        }

        $ifconfig = (string) ob_get_clean();

        if (preg_match_all(self::IFCONFIG_PATTERN, $ifconfig, $matches, PREG_PATTERN_ORDER)) {
            foreach ($matches[1] as $iface) {
                if ($iface !== '00:00:00:00:00:00' && $iface !== '00-00-00-00-00-00') {
                    return $iface;
                }
            }
        }

        return '';
    }

    /**
     * Returns MAC address from the first system interface via the sysfs interface
     */
    protected function getSysfs(): string
    {
        $mac = '';

        /**
         * @psalm-suppress UnnecessaryVarAnnotation
         * @var string $phpOs
         */
        $phpOs = constant('PHP_OS');

        if (strtoupper($phpOs) === 'LINUX') {
            $addressPaths = glob('/sys/class/net/*/address', GLOB_NOSORT);

            if ($addressPaths === false || count($addressPaths) === 0) {
                return '';
            }

            /** @var array<array-key, string> $macs */
            $macs = [];

            array_walk($addressPaths, function (string $addressPath) use (&$macs): void {
                if (is_readable($addressPath)) {
                    $macs[] = file_get_contents($addressPath);
                }
            });

            /** @var callable $trim */
            $trim = 'trim';

            $macs = array_map($trim, $macs);

            // Remove invalid entries.
            $macs = array_filter($macs, function (string $address) {
                return $address !== '00:00:00:00:00:00'
                    && preg_match(self::SYSFS_PATTERN, $address);
            });

            /** @var string|bool $mac */
            $mac = reset($macs);
        }

        return (string) $mac;
    }
}

• [F] FallbackNodeProvider.php
  Delete
• [F] NodeProviderCollection.php
  Delete
• [F] RandomNodeProvider.php
  Delete
• [F] StaticNodeProvider.php
  Delete
• [F] SystemNodeProvider.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.