<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation;

/**
 * StreamedResponse represents a streamed HTTP response.
 *
 * A StreamedResponse uses a callback for its content.
 *
 * The callback should use the standard PHP functions like echo
 * to stream the response back to the client. The flush() function
 * can also be used if needed.
 *
 * @see flush()
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class StreamedResponse extends Response
{
    protected $callback;
    protected $streamed;
    private bool $headersSent;

    public function __construct(callable $callback = null, int $status = 200, array $headers = [])
    {
        parent::__construct(null, $status, $headers);

        if (null !== $callback) {
            $this->setCallback($callback);
        }
        $this->streamed = false;
        $this->headersSent = false;
    }

    /**
     * Sets the PHP callback associated with this Response.
     *
     * @return $this
     */
    public function setCallback(callable $callback): static
    {
        $this->callback = $callback;

        return $this;
    }

    /**
     * {@inheritdoc}
     *
     * This method only sends the headers once.
     *
     * @return $this
     */
    public function sendHeaders(): static
    {
        if ($this->headersSent) {
            return $this;
        }

        $this->headersSent = true;

        return parent::sendHeaders();
    }

    /**
     * {@inheritdoc}
     *
     * This method only sends the content once.
     *
     * @return $this
     */
    public function sendContent(): static
    {
        if ($this->streamed) {
            return $this;
        }

        $this->streamed = true;

        if (null === $this->callback) {
            throw new \LogicException('The Response callback must not be null.');
        }

        ($this->callback)();

        return $this;
    }

    /**
     * {@inheritdoc}
     *
     * @throws \LogicException when the content is not null
     *
     * @return $this
     */
    public function setContent(?string $content): static
    {
        if (null !== $content) {
            throw new \LogicException('The content cannot be set on a StreamedResponse instance.');
        }

        $this->streamed = true;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getContent(): string|false
    {
        return false;
    }
}

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• [D] File
• [D] RateLimiter
• [D] Session
• [D] Test
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• [F] CHANGELOG.md
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• [F] ExpressionRequestMatcher.php
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• [F] FileBag.php
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• [F] HeaderBag.php
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• [F] HeaderUtils.php
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• [F] Response.php
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• [F] ServerBag.php
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• [F] StreamedResponse.php
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• [F] UrlHelper.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