<?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\Mime\Header;

use Symfony\Component\Mime\Encoder\Rfc2231Encoder;

/**
 * @author Chris Corbyn
 */
final class ParameterizedHeader extends UnstructuredHeader
{
    /**
     * RFC 2231's definition of a token.
     *
     * @var string
     */
    public const TOKEN_REGEX = '(?:[\x21\x23-\x27\x2A\x2B\x2D\x2E\x30-\x39\x41-\x5A\x5E-\x7E]+)';

    private $encoder = null;
    private array $parameters = [];

    public function __construct(string $name, string $value, array $parameters = [])
    {
        parent::__construct($name, $value);

        foreach ($parameters as $k => $v) {
            $this->setParameter($k, $v);
        }

        if ('content-type' !== strtolower($name)) {
            $this->encoder = new Rfc2231Encoder();
        }
    }

    public function setParameter(string $parameter, ?string $value)
    {
        $this->setParameters(array_merge($this->getParameters(), [$parameter => $value]));
    }

    public function getParameter(string $parameter): string
    {
        return $this->getParameters()[$parameter] ?? '';
    }

    /**
     * @param string[] $parameters
     */
    public function setParameters(array $parameters)
    {
        $this->parameters = $parameters;
    }

    /**
     * @return string[]
     */
    public function getParameters(): array
    {
        return $this->parameters;
    }

    public function getBodyAsString(): string
    {
        $body = parent::getBodyAsString();
        foreach ($this->parameters as $name => $value) {
            if (null !== $value) {
                $body .= '; '.$this->createParameter($name, $value);
            }
        }

        return $body;
    }

    /**
     * Generate a list of all tokens in the final header.
     *
     * This doesn't need to be overridden in theory, but it is for implementation
     * reasons to prevent potential breakage of attributes.
     */
    protected function toTokens(string $string = null): array
    {
        $tokens = parent::toTokens(parent::getBodyAsString());

        // Try creating any parameters
        foreach ($this->parameters as $name => $value) {
            if (null !== $value) {
                // Add the semi-colon separator
                $tokens[\count($tokens) - 1] .= ';';
                $tokens = array_merge($tokens, $this->generateTokenLines(' '.$this->createParameter($name, $value)));
            }
        }

        return $tokens;
    }

    /**
     * Render an RFC 2047 compliant header parameter from the $name and $value.
     */
    private function createParameter(string $name, string $value): string
    {
        $origValue = $value;

        $encoded = false;
        // Allow room for parameter name, indices, "=" and DQUOTEs
        $maxValueLength = $this->getMaxLineLength() - \strlen($name.'=*N"";') - 1;
        $firstLineOffset = 0;

        // If it's not already a valid parameter value...
        if (!preg_match('/^'.self::TOKEN_REGEX.'$/D', $value)) {
            // TODO: text, or something else??
            // ... and it's not ascii
            if (!preg_match('/^[\x00-\x08\x0B\x0C\x0E-\x7F]*$/D', $value)) {
                $encoded = true;
                // Allow space for the indices, charset and language
                $maxValueLength = $this->getMaxLineLength() - \strlen($name.'*N*="";') - 1;
                $firstLineOffset = \strlen($this->getCharset()."'".$this->getLanguage()."'");
            }

            if (\in_array($name, ['name', 'filename'], true) && 'form-data' === $this->getValue() && 'content-disposition' === strtolower($this->getName()) && preg_match('//u', $value)) {
                // WHATWG HTML living standard 4.10.21.8 2 specifies:
                // For field names and filenames for file fields, the result of the
                // encoding in the previous bullet point must be escaped by replacing
                // any 0x0A (LF) bytes with the byte sequence `%0A`, 0x0D (CR) with `%0D`
                // and 0x22 (") with `%22`.
                // The user agent must not perform any other escapes.
                $value = str_replace(['"', "\r", "\n"], ['%22', '%0D', '%0A'], $value);

                if (\strlen($value) <= $maxValueLength) {
                    return $name.'="'.$value.'"';
                }

                $value = $origValue;
            }
        }

        // Encode if we need to
        if ($encoded || \strlen($value) > $maxValueLength) {
            if (null !== $this->encoder) {
                $value = $this->encoder->encodeString($origValue, $this->getCharset(), $firstLineOffset, $maxValueLength);
            } else {
                // We have to go against RFC 2183/2231 in some areas for interoperability
                $value = $this->getTokenAsEncodedWord($origValue);
                $encoded = false;
            }
        }

        $valueLines = $this->encoder ? explode("\r\n", $value) : [$value];

        // Need to add indices
        if (\count($valueLines) > 1) {
            $paramLines = [];
            foreach ($valueLines as $i => $line) {
                $paramLines[] = $name.'*'.$i.$this->getEndOfParameterValue($line, true, 0 === $i);
            }

            return implode(";\r\n ", $paramLines);
        } else {
            return $name.$this->getEndOfParameterValue($valueLines[0], $encoded, true);
        }
    }

    /**
     * Returns the parameter value from the "=" and beyond.
     *
     * @param string $value to append
     */
    private function getEndOfParameterValue(string $value, bool $encoded = false, bool $firstLine = false): string
    {
        $forceHttpQuoting = 'form-data' === $this->getValue() && 'content-disposition' === strtolower($this->getName());
        if ($forceHttpQuoting || !preg_match('/^'.self::TOKEN_REGEX.'$/D', $value)) {
            $value = '"'.$value.'"';
        }
        $prepend = '=';
        if ($encoded) {
            $prepend = '*=';
            if ($firstLine) {
                $prepend = '*='.$this->getCharset()."'".$this->getLanguage()."'";
            }
        }

        return $prepend.$value;
    }
}

• [F] AbstractHeader.php
  Delete
• [F] DateHeader.php
  Delete
• [F] HeaderInterface.php
  Delete
• [F] Headers.php
  Delete
• [F] IdentificationHeader.php
  Delete
• [F] MailboxHeader.php
  Delete
• [F] MailboxListHeader.php
  Delete
• [F] ParameterizedHeader.php
  Delete
• [F] PathHeader.php
  Delete
• [F] UnstructuredHeader.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.

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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.

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