<?php

declare(strict_types=1);

namespace Doctrine\Common\Lexer;

use ReflectionClass;
use UnitEnum;

use function get_class;
use function implode;
use function preg_split;
use function sprintf;
use function substr;

use const PREG_SPLIT_DELIM_CAPTURE;
use const PREG_SPLIT_NO_EMPTY;
use const PREG_SPLIT_OFFSET_CAPTURE;

/**
 * Base class for writing simple lexers, i.e. for creating small DSLs.
 *
 * @template T of UnitEnum|string|int
 * @template V of string|int
 */
abstract class AbstractLexer
{
    /**
     * Lexer original input string.
     *
     * @var string
     */
    private $input;

    /**
     * Array of scanned tokens.
     *
     * @var list<Token<T, V>>
     */
    private $tokens = [];

    /**
     * Current lexer position in input string.
     *
     * @var int
     */
    private $position = 0;

    /**
     * Current peek of current lexer position.
     *
     * @var int
     */
    private $peek = 0;

    /**
     * The next token in the input.
     *
     * @var Token<T, V>|null
     */
    public $lookahead;

    /**
     * The last matched/seen token.
     *
     * @var Token<T, V>|null
     */
    public $token;

    /**
     * Composed regex for input parsing.
     *
     * @var non-empty-string|null
     */
    private $regex;

    /**
     * Sets the input data to be tokenized.
     *
     * The Lexer is immediately reset and the new input tokenized.
     * Any unprocessed tokens from any previous input are lost.
     *
     * @param string $input The input to be tokenized.
     *
     * @return void
     */
    public function setInput($input)
    {
        $this->input  = $input;
        $this->tokens = [];

        $this->reset();
        $this->scan($input);
    }

    /**
     * Resets the lexer.
     *
     * @return void
     */
    public function reset()
    {
        $this->lookahead = null;
        $this->token     = null;
        $this->peek      = 0;
        $this->position  = 0;
    }

    /**
     * Resets the peek pointer to 0.
     *
     * @return void
     */
    public function resetPeek()
    {
        $this->peek = 0;
    }

    /**
     * Resets the lexer position on the input to the given position.
     *
     * @param int $position Position to place the lexical scanner.
     *
     * @return void
     */
    public function resetPosition($position = 0)
    {
        $this->position = $position;
    }

    /**
     * Retrieve the original lexer's input until a given position.
     *
     * @param int $position
     *
     * @return string
     */
    public function getInputUntilPosition($position)
    {
        return substr($this->input, 0, $position);
    }

    /**
     * Checks whether a given token matches the current lookahead.
     *
     * @param T $type
     *
     * @return bool
     *
     * @psalm-assert-if-true !=null $this->lookahead
     */
    public function isNextToken($type)
    {
        return $this->lookahead !== null && $this->lookahead->isA($type);
    }

    /**
     * Checks whether any of the given tokens matches the current lookahead.
     *
     * @param list<T> $types
     *
     * @return bool
     *
     * @psalm-assert-if-true !=null $this->lookahead
     */
    public function isNextTokenAny(array $types)
    {
        return $this->lookahead !== null && $this->lookahead->isA(...$types);
    }

    /**
     * Moves to the next token in the input string.
     *
     * @return bool
     *
     * @psalm-assert-if-true !null $this->lookahead
     */
    public function moveNext()
    {
        $this->peek      = 0;
        $this->token     = $this->lookahead;
        $this->lookahead = isset($this->tokens[$this->position])
            ? $this->tokens[$this->position++] : null;

        return $this->lookahead !== null;
    }

    /**
     * Tells the lexer to skip input tokens until it sees a token with the given value.
     *
     * @param T $type The token type to skip until.
     *
     * @return void
     */
    public function skipUntil($type)
    {
        while ($this->lookahead !== null && ! $this->lookahead->isA($type)) {
            $this->moveNext();
        }
    }

    /**
     * Checks if given value is identical to the given token.
     *
     * @param string     $value
     * @param int|string $token
     *
     * @return bool
     */
    public function isA($value, $token)
    {
        return $this->getType($value) === $token;
    }

    /**
     * Moves the lookahead token forward.
     *
     * @return Token<T, V>|null The next token or NULL if there are no more tokens ahead.
     */
    public function peek()
    {
        if (isset($this->tokens[$this->position + $this->peek])) {
            return $this->tokens[$this->position + $this->peek++];
        }

        return null;
    }

    /**
     * Peeks at the next token, returns it and immediately resets the peek.
     *
     * @return Token<T, V>|null The next token or NULL if there are no more tokens ahead.
     */
    public function glimpse()
    {
        $peek       = $this->peek();
        $this->peek = 0;

        return $peek;
    }

    /**
     * Scans the input string for tokens.
     *
     * @param string $input A query string.
     *
     * @return void
     */
    protected function scan($input)
    {
        if (! isset($this->regex)) {
            $this->regex = sprintf(
                '/(%s)|%s/%s',
                implode(')|(', $this->getCatchablePatterns()),
                implode('|', $this->getNonCatchablePatterns()),
                $this->getModifiers()
            );
        }

        $flags   = PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_OFFSET_CAPTURE;
        $matches = preg_split($this->regex, $input, -1, $flags);

        if ($matches === false) {
            // Work around https://bugs.php.net/78122
            $matches = [[$input, 0]];
        }

        foreach ($matches as $match) {
            // Must remain before 'value' assignment since it can change content
            $firstMatch = $match[0];
            $type       = $this->getType($firstMatch);

            $this->tokens[] = new Token(
                $firstMatch,
                $type,
                $match[1]
            );
        }
    }

    /**
     * Gets the literal for a given token.
     *
     * @param T $token
     *
     * @return int|string
     */
    public function getLiteral($token)
    {
        if ($token instanceof UnitEnum) {
            return get_class($token) . '::' . $token->name;
        }

        $className = static::class;

        $reflClass = new ReflectionClass($className);
        $constants = $reflClass->getConstants();

        foreach ($constants as $name => $value) {
            if ($value === $token) {
                return $className . '::' . $name;
            }
        }

        return $token;
    }

    /**
     * Regex modifiers
     *
     * @return string
     */
    protected function getModifiers()
    {
        return 'iu';
    }

    /**
     * Lexical catchable patterns.
     *
     * @return string[]
     */
    abstract protected function getCatchablePatterns();

    /**
     * Lexical non-catchable patterns.
     *
     * @return string[]
     */
    abstract protected function getNonCatchablePatterns();

    /**
     * Retrieve token type. Also processes the token value if necessary.
     *
     * @param string $value
     *
     * @return T|null
     *
     * @param-out V $value
     */
    abstract protected function getType(&$value);
}

• [F] AbstractLexer.php
  Delete
• [F] Token.php
  Delete

Secure, Swift, and Smart Payments with NFCPay !

With NFC Pay, experience seamless and secure transactions right at your fingertips. Add your cards, load your wallet, and make payments effortlessly. Activate your merchant account to receive payments or transfer money instantly to other users. NFC Pay combines security, speed, and smart features, making every transaction smooth and reliable. Embrace the future of payments with NFC Pay.

2320

Total User

2320

Happy User

Our Best Customer

How it Works

Quick Steps to NFC Pay

Getting started with NFC Pay is simple and quick. Register your account, add your cards, and you're ready to make payments in no time. Whether you're paying at a store, sending money to a friend, or managing your merchant transactions, NFC Pay makes it easy and secure.

1

Register Your Account

Download the NFC Pay app and sign up with your email or phone number. Complete the registration process by verifying your identity, and set up your secure PIN to protect your account.

2

Add Your Cards

Link your debit or credit cards to your NFC Pay wallet. Simply scan your card or enter the details manually, and you’re set to load funds, shop, and pay with ease.

3

Make Payment

To pay, simply tap your phone or scan the QR code at checkout. You can also transfer money to other users with a few taps. Enjoy fast, contactless payments with top-notch security.

Security System

Advanced Security Features Designed to Protect Your Information Effectively

NFC Pay prioritizes your security with advanced features that safeguard every transaction. From SMS or email verification to end-to-end encryption, we've implemented robust measures to ensure your data is always protected. Our security systems are designed to prevent unauthorized access and provide you with a safe and reliable payment experience.

SMS or Email Verification

Receive instant alerts for every transaction to keep track of your account activities.

KYC Solution

Verify your identity through our Know Your Customer process to prevent fraud and enhance security.

Two Factor Authentication

Dramatically supply transparent backward deliverables before caward comp internal or "organic" sources.

End-to-End Encryption

All your data and transactions are encrypted, ensuring that your sensitive information remains private.

Behavior Tracking

Monitor unusual activity patterns to detect and prevent suspicious behavior in real-time.

Why Choice Us

Top Reasons to Choose Us for Reliable and Expert Solutions

With NFC Pay, you get a trusted platform backed by proven expertise and a commitment to quality. We put our customers first, offering innovative solutions tailored to your needs, ensuring every transaction is secure, swift, and seamless.

1

Proven Expertise

Our team brings years of experience in the digital payments industry to provide reliable services.

2

Commitment to Quality

We prioritize excellence, ensuring that every aspect of our platform meets the highest standards.

3

Customer-Centric Approach

Your needs drive our solutions, and we are dedicated to delivering a superior user experience.

4

Innovative Solutions

We continuously evolve, integrating the latest technologies to enhance your payment experience.

Testimonial Section

Customer Feedback: Real Experiences from Satisfied Clients and Partners

Hear from our users who trust NFC Pay for their everyday transactions. Our commitment to security, ease of use, and exceptional service shines through in their experiences. See why our clients choose NFC Pay for their payment needs and how it has transformed the way they manage their finances.

"NFC Pay has made my transactions incredibly simple and secure. The intuitive interface and quick payment options are game-changers for my business"

Sophia Martinez

"I love how NFC Pay prioritizes security without compromising on convenience. The two-factor authentication and instant alerts give me peace of mind every time I use it."

Emily Clark

"Setting up my merchant account was a breeze, and now I can accept payments effortlessly. NFC Pay has truly streamlined my operations, saving me time and hassle."

John Carter

App Section

Get the NFC Pay App for Seamless Transactions Anytime, Anywhere

Unlock the full potential of NFC Pay by downloading our app, designed to bring secure, swift, and smart transactions to your fingertips. Whether you're paying at a store, transferring money to friends, or managing your business payments, the NFC Pay app makes it effortless. Available on both iOS and Android, it's your all-in-one solution for convenient and reliable digital payments. Download now and experience the future of payments!

Get it on

Google Pay

Download On The

Apple Store