<?php

/*
 * This file is part of fruitcake/php-cors and was originally part of asm89/stack-cors
 *
 * (c) Alexander <iam.asm89@gmail.com>
 * (c) Barryvdh <barryvdh@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Fruitcake\Cors;

use Fruitcake\Cors\Exceptions\InvalidOptionException;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * @phpstan-type CorsInputOptions array{
 *  'allowedOrigins'?: string[],
 *  'allowedOriginsPatterns'?: string[],
 *  'supportsCredentials'?: bool,
 *  'allowedHeaders'?: string[],
 *  'allowedMethods'?: string[],
 *  'exposedHeaders'?: string[]|false,
 *  'maxAge'?: int|bool|null,
 *  'allowed_origins'?: string[],
 *  'allowed_origins_patterns'?: string[],
 *  'supports_credentials'?: bool,
 *  'allowed_headers'?: string[],
 *  'allowed_methods'?: string[],
 *  'exposed_headers'?: string[]|false,
 *  'max_age'?: int|bool|null
 * }
 *
 */
class CorsService
{
    /** @var string[]  */
    private array $allowedOrigins = [];
    /** @var string[] */
    private array $allowedOriginsPatterns = [];
    /** @var string[] */
    private array $allowedMethods = [];
    /** @var string[] */
    private array $allowedHeaders = [];
    /** @var string[] */
    private array $exposedHeaders = [];
    private bool $supportsCredentials = false;
    private ?int $maxAge = 0;

    private bool $allowAllOrigins = false;
    private bool $allowAllMethods = false;
    private bool $allowAllHeaders = false;

    /**
     * @param CorsInputOptions $options
     */
    public function __construct(array $options = [])
    {
        if ($options) {
            $this->setOptions($options);
        }
    }

    /**
     * @param CorsInputOptions $options
     */
    public function setOptions(array $options): void
    {
        $this->allowedOrigins = $options['allowedOrigins'] ?? $options['allowed_origins'] ?? $this->allowedOrigins;
        $this->allowedOriginsPatterns =
            $options['allowedOriginsPatterns'] ?? $options['allowed_origins_patterns'] ?? $this->allowedOriginsPatterns;
        $this->allowedMethods = $options['allowedMethods'] ?? $options['allowed_methods'] ?? $this->allowedMethods;
        $this->allowedHeaders = $options['allowedHeaders'] ?? $options['allowed_headers'] ?? $this->allowedHeaders;
        $this->supportsCredentials =
            $options['supportsCredentials'] ?? $options['supports_credentials'] ?? $this->supportsCredentials;

        $maxAge = $this->maxAge;
        if (array_key_exists('maxAge', $options)) {
            $maxAge = $options['maxAge'];
        } elseif (array_key_exists('max_age', $options)) {
            $maxAge = $options['max_age'];
        }
        $this->maxAge = $maxAge === null ? null : (int)$maxAge;

        $exposedHeaders = $options['exposedHeaders'] ?? $options['exposed_headers'] ?? $this->exposedHeaders;
        $this->exposedHeaders = $exposedHeaders === false ? [] : $exposedHeaders;

        $this->normalizeOptions();
    }

    private function normalizeOptions(): void
    {
        // Normalize case
        $this->allowedHeaders = array_map('strtolower', $this->allowedHeaders);
        $this->allowedMethods = array_map('strtoupper', $this->allowedMethods);

        // Normalize ['*'] to true
        $this->allowAllOrigins = in_array('*', $this->allowedOrigins);
        $this->allowAllHeaders = in_array('*', $this->allowedHeaders);
        $this->allowAllMethods = in_array('*', $this->allowedMethods);

        // Transform wildcard pattern
        if (!$this->allowAllOrigins) {
            foreach ($this->allowedOrigins as $origin) {
                if (strpos($origin, '*') !== false) {
                    $this->allowedOriginsPatterns[] = $this->convertWildcardToPattern($origin);
                }
            }
        }
    }

    /**
     * Create a pattern for a wildcard, based on Str::is() from Laravel
     *
     * @see https://github.com/laravel/framework/blob/5.5/src/Illuminate/Support/Str.php
     * @param string $pattern
     * @return string
     */
    private function convertWildcardToPattern($pattern)
    {
        $pattern = preg_quote($pattern, '#');

        // Asterisks are translated into zero-or-more regular expression wildcards
        // to make it convenient to check if the strings starts with the given
        // pattern such as "*.example.com", making any string check convenient.
        $pattern = str_replace('\*', '.*', $pattern);

        return '#^' . $pattern . '\z#u';
    }

    public function isCorsRequest(Request $request): bool
    {
        return $request->headers->has('Origin');
    }

    public function isPreflightRequest(Request $request): bool
    {
        return $request->getMethod() === 'OPTIONS' && $request->headers->has('Access-Control-Request-Method');
    }

    public function handlePreflightRequest(Request $request): Response
    {
        $response = new Response();

        $response->setStatusCode(204);

        return $this->addPreflightRequestHeaders($response, $request);
    }

    public function addPreflightRequestHeaders(Response $response, Request $request): Response
    {
        $this->configureAllowedOrigin($response, $request);

        if ($response->headers->has('Access-Control-Allow-Origin')) {
            $this->configureAllowCredentials($response, $request);

            $this->configureAllowedMethods($response, $request);

            $this->configureAllowedHeaders($response, $request);

            $this->configureMaxAge($response, $request);
        }

        return $response;
    }

    public function isOriginAllowed(Request $request): bool
    {
        if ($this->allowAllOrigins === true) {
            return true;
        }

        $origin = (string) $request->headers->get('Origin');

        if (in_array($origin, $this->allowedOrigins)) {
            return true;
        }

        foreach ($this->allowedOriginsPatterns as $pattern) {
            if (preg_match($pattern, $origin)) {
                return true;
            }
        }

        return false;
    }

    public function addActualRequestHeaders(Response $response, Request $request): Response
    {
        $this->configureAllowedOrigin($response, $request);

        if ($response->headers->has('Access-Control-Allow-Origin')) {
            $this->configureAllowCredentials($response, $request);

            $this->configureExposedHeaders($response, $request);
        }

        return $response;
    }

    private function configureAllowedOrigin(Response $response, Request $request): void
    {
        if ($this->allowAllOrigins === true && !$this->supportsCredentials) {
            // Safe+cacheable, allow everything
            $response->headers->set('Access-Control-Allow-Origin', '*');
        } elseif ($this->isSingleOriginAllowed()) {
            // Single origins can be safely set
            $response->headers->set('Access-Control-Allow-Origin', array_values($this->allowedOrigins)[0]);
        } else {
            // For dynamic headers, set the requested Origin header when set and allowed
            if ($this->isCorsRequest($request) && $this->isOriginAllowed($request)) {
                $response->headers->set('Access-Control-Allow-Origin', (string) $request->headers->get('Origin'));
            }

            $this->varyHeader($response, 'Origin');
        }
    }

    private function isSingleOriginAllowed(): bool
    {
        if ($this->allowAllOrigins === true || count($this->allowedOriginsPatterns) > 0) {
            return false;
        }

        return count($this->allowedOrigins) === 1;
    }

    private function configureAllowedMethods(Response $response, Request $request): void
    {
        if ($this->allowAllMethods === true) {
            $allowMethods = strtoupper((string) $request->headers->get('Access-Control-Request-Method'));
            $this->varyHeader($response, 'Access-Control-Request-Method');
        } else {
            $allowMethods = implode(', ', $this->allowedMethods);
        }

        $response->headers->set('Access-Control-Allow-Methods', $allowMethods);
    }

    private function configureAllowedHeaders(Response $response, Request $request): void
    {
        if ($this->allowAllHeaders === true) {
            $allowHeaders = (string) $request->headers->get('Access-Control-Request-Headers');
            $this->varyHeader($response, 'Access-Control-Request-Headers');
        } else {
            $allowHeaders = implode(', ', $this->allowedHeaders);
        }
        $response->headers->set('Access-Control-Allow-Headers', $allowHeaders);
    }

    private function configureAllowCredentials(Response $response, Request $request): void
    {
        if ($this->supportsCredentials) {
            $response->headers->set('Access-Control-Allow-Credentials', 'true');
        }
    }

    private function configureExposedHeaders(Response $response, Request $request): void
    {
        if ($this->exposedHeaders) {
            $response->headers->set('Access-Control-Expose-Headers', implode(', ', $this->exposedHeaders));
        }
    }

    private function configureMaxAge(Response $response, Request $request): void
    {
        if ($this->maxAge !== null) {
            $response->headers->set('Access-Control-Max-Age', (string) $this->maxAge);
        }
    }

    public function varyHeader(Response $response, string $header): Response
    {
        if (!$response->headers->has('Vary')) {
            $response->headers->set('Vary', $header);
        } elseif (!in_array($header, explode(', ', (string) $response->headers->get('Vary')))) {
            $response->headers->set('Vary', ((string) $response->headers->get('Vary')) . ', ' . $header);
        }

        return $response;
    }
}

• [D] Exceptions
• [F] CorsService.php
  Delete

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