<?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\Routing\Matcher\Dumper;

use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;

/**
 * CompiledUrlMatcherDumper creates PHP arrays to be used with CompiledUrlMatcher.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Tobias Schultze <http://tobion.de>
 * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
 * @author Nicolas Grekas <p@tchwork.com>
 */
class CompiledUrlMatcherDumper extends MatcherDumper
{
    private $expressionLanguage;
    private ?\Exception $signalingException = null;

    /**
     * @var ExpressionFunctionProviderInterface[]
     */
    private array $expressionLanguageProviders = [];

    /**
     * {@inheritdoc}
     */
    public function dump(array $options = []): string
    {
        return <<<EOF
<?php

/**
 * This file has been auto-generated
 * by the Symfony Routing Component.
 */

return [
{$this->generateCompiledRoutes()}];

EOF;
    }

    public function addExpressionLanguageProvider(ExpressionFunctionProviderInterface $provider)
    {
        $this->expressionLanguageProviders[] = $provider;
    }

    /**
     * Generates the arrays for CompiledUrlMatcher's constructor.
     */
    public function getCompiledRoutes(bool $forDump = false): array
    {
        // Group hosts by same-suffix, re-order when possible
        $matchHost = false;
        $routes = new StaticPrefixCollection();
        foreach ($this->getRoutes()->all() as $name => $route) {
            if ($host = $route->getHost()) {
                $matchHost = true;
                $host = '/'.strtr(strrev($host), '}.{', '(/)');
            }

            $routes->addRoute($host ?: '/(.*)', [$name, $route]);
        }

        if ($matchHost) {
            $compiledRoutes = [true];
            $routes = $routes->populateCollection(new RouteCollection());
        } else {
            $compiledRoutes = [false];
            $routes = $this->getRoutes();
        }

        [$staticRoutes, $dynamicRoutes] = $this->groupStaticRoutes($routes);

        $conditions = [null];
        $compiledRoutes[] = $this->compileStaticRoutes($staticRoutes, $conditions);
        $chunkLimit = \count($dynamicRoutes);

        while (true) {
            try {
                $this->signalingException = new \RuntimeException('Compilation failed: regular expression is too large');
                $compiledRoutes = array_merge($compiledRoutes, $this->compileDynamicRoutes($dynamicRoutes, $matchHost, $chunkLimit, $conditions));

                break;
            } catch (\Exception $e) {
                if (1 < $chunkLimit && $this->signalingException === $e) {
                    $chunkLimit = 1 + ($chunkLimit >> 1);
                    continue;
                }
                throw $e;
            }
        }

        if ($forDump) {
            $compiledRoutes[2] = $compiledRoutes[4];
        }
        unset($conditions[0]);

        if ($conditions) {
            foreach ($conditions as $expression => $condition) {
                $conditions[$expression] = "case {$condition}: return {$expression};";
            }

            $checkConditionCode = <<<EOF
    static function (\$condition, \$context, \$request) { // \$checkCondition
        switch (\$condition) {
{$this->indent(implode("\n", $conditions), 3)}
        }
    }
EOF;
            $compiledRoutes[4] = $forDump ? $checkConditionCode.",\n" : eval('return '.$checkConditionCode.';');
        } else {
            $compiledRoutes[4] = $forDump ? "    null, // \$checkCondition\n" : null;
        }

        return $compiledRoutes;
    }

    private function generateCompiledRoutes(): string
    {
        [$matchHost, $staticRoutes, $regexpCode, $dynamicRoutes, $checkConditionCode] = $this->getCompiledRoutes(true);

        $code = self::export($matchHost).', // $matchHost'."\n";

        $code .= '[ // $staticRoutes'."\n";
        foreach ($staticRoutes as $path => $routes) {
            $code .= sprintf("    %s => [\n", self::export($path));
            foreach ($routes as $route) {
                $code .= sprintf("        [%s, %s, %s, %s, %s, %s, %s],\n", ...array_map([__CLASS__, 'export'], $route));
            }
            $code .= "    ],\n";
        }
        $code .= "],\n";

        $code .= sprintf("[ // \$regexpList%s\n],\n", $regexpCode);

        $code .= '[ // $dynamicRoutes'."\n";
        foreach ($dynamicRoutes as $path => $routes) {
            $code .= sprintf("    %s => [\n", self::export($path));
            foreach ($routes as $route) {
                $code .= sprintf("        [%s, %s, %s, %s, %s, %s, %s],\n", ...array_map([__CLASS__, 'export'], $route));
            }
            $code .= "    ],\n";
        }
        $code .= "],\n";
        $code = preg_replace('/ => \[\n        (\[.+?),\n    \],/', ' => [$1],', $code);

        return $this->indent($code, 1).$checkConditionCode;
    }

    /**
     * Splits static routes from dynamic routes, so that they can be matched first, using a simple switch.
     */
    private function groupStaticRoutes(RouteCollection $collection): array
    {
        $staticRoutes = $dynamicRegex = [];
        $dynamicRoutes = new RouteCollection();

        foreach ($collection->all() as $name => $route) {
            $compiledRoute = $route->compile();
            $staticPrefix = rtrim($compiledRoute->getStaticPrefix(), '/');
            $hostRegex = $compiledRoute->getHostRegex();
            $regex = $compiledRoute->getRegex();
            if ($hasTrailingSlash = '/' !== $route->getPath()) {
                $pos = strrpos($regex, '$');
                $hasTrailingSlash = '/' === $regex[$pos - 1];
                $regex = substr_replace($regex, '/?$', $pos - $hasTrailingSlash, 1 + $hasTrailingSlash);
            }

            if (!$compiledRoute->getPathVariables()) {
                $host = !$compiledRoute->getHostVariables() ? $route->getHost() : '';
                $url = $route->getPath();
                if ($hasTrailingSlash) {
                    $url = substr($url, 0, -1);
                }
                foreach ($dynamicRegex as [$hostRx, $rx, $prefix]) {
                    if (('' === $prefix || str_starts_with($url, $prefix)) && (preg_match($rx, $url) || preg_match($rx, $url.'/')) && (!$host || !$hostRx || preg_match($hostRx, $host))) {
                        $dynamicRegex[] = [$hostRegex, $regex, $staticPrefix];
                        $dynamicRoutes->add($name, $route);
                        continue 2;
                    }
                }

                $staticRoutes[$url][$name] = [$route, $hasTrailingSlash];
            } else {
                $dynamicRegex[] = [$hostRegex, $regex, $staticPrefix];
                $dynamicRoutes->add($name, $route);
            }
        }

        return [$staticRoutes, $dynamicRoutes];
    }

    /**
     * Compiles static routes in a switch statement.
     *
     * Condition-less paths are put in a static array in the switch's default, with generic matching logic.
     * Paths that can match two or more routes, or have user-specified conditions are put in separate switch's cases.
     *
     * @throws \LogicException
     */
    private function compileStaticRoutes(array $staticRoutes, array &$conditions): array
    {
        if (!$staticRoutes) {
            return [];
        }
        $compiledRoutes = [];

        foreach ($staticRoutes as $url => $routes) {
            $compiledRoutes[$url] = [];
            foreach ($routes as $name => [$route, $hasTrailingSlash]) {
                $compiledRoutes[$url][] = $this->compileRoute($route, $name, (!$route->compile()->getHostVariables() ? $route->getHost() : $route->compile()->getHostRegex()) ?: null, $hasTrailingSlash, false, $conditions);
            }
        }

        return $compiledRoutes;
    }

    /**
     * Compiles a regular expression followed by a switch statement to match dynamic routes.
     *
     * The regular expression matches both the host and the pathinfo at the same time. For stellar performance,
     * it is built as a tree of patterns, with re-ordering logic to group same-prefix routes together when possible.
     *
     * Patterns are named so that we know which one matched (https://pcre.org/current/doc/html/pcre2syntax.html#SEC23).
     * This name is used to "switch" to the additional logic required to match the final route.
     *
     * Condition-less paths are put in a static array in the switch's default, with generic matching logic.
     * Paths that can match two or more routes, or have user-specified conditions are put in separate switch's cases.
     *
     * Last but not least:
     *  - Because it is not possible to mix unicode/non-unicode patterns in a single regexp, several of them can be generated.
     *  - The same regexp can be used several times when the logic in the switch rejects the match. When this happens, the
     *    matching-but-failing subpattern is excluded by replacing its name by "(*F)", which forces a failure-to-match.
     *    To ease this backlisting operation, the name of subpatterns is also the string offset where the replacement should occur.
     */
    private function compileDynamicRoutes(RouteCollection $collection, bool $matchHost, int $chunkLimit, array &$conditions): array
    {
        if (!$collection->all()) {
            return [[], [], ''];
        }
        $regexpList = [];
        $code = '';
        $state = (object) [
            'regexMark' => 0,
            'regex' => [],
            'routes' => [],
            'mark' => 0,
            'markTail' => 0,
            'hostVars' => [],
            'vars' => [],
        ];
        $state->getVars = static function ($m) use ($state) {
            if ('_route' === $m[1]) {
                return '?:';
            }

            $state->vars[] = $m[1];

            return '';
        };

        $chunkSize = 0;
        $prev = null;
        $perModifiers = [];
        foreach ($collection->all() as $name => $route) {
            preg_match('#[a-zA-Z]*$#', $route->compile()->getRegex(), $rx);
            if ($chunkLimit < ++$chunkSize || $prev !== $rx[0] && $route->compile()->getPathVariables()) {
                $chunkSize = 1;
                $routes = new RouteCollection();
                $perModifiers[] = [$rx[0], $routes];
                $prev = $rx[0];
            }
            $routes->add($name, $route);
        }

        foreach ($perModifiers as [$modifiers, $routes]) {
            $prev = false;
            $perHost = [];
            foreach ($routes->all() as $name => $route) {
                $regex = $route->compile()->getHostRegex();
                if ($prev !== $regex) {
                    $routes = new RouteCollection();
                    $perHost[] = [$regex, $routes];
                    $prev = $regex;
                }
                $routes->add($name, $route);
            }
            $prev = false;
            $rx = '{^(?';
            $code .= "\n    {$state->mark} => ".self::export($rx);
            $startingMark = $state->mark;
            $state->mark += \strlen($rx);
            $state->regex = $rx;

            foreach ($perHost as [$hostRegex, $routes]) {
                if ($matchHost) {
                    if ($hostRegex) {
                        preg_match('#^.\^(.*)\$.[a-zA-Z]*$#', $hostRegex, $rx);
                        $state->vars = [];
                        $hostRegex = '(?i:'.preg_replace_callback('#\?P<([^>]++)>#', $state->getVars, $rx[1]).')\.';
                        $state->hostVars = $state->vars;
                    } else {
                        $hostRegex = '(?:(?:[^./]*+\.)++)';
                        $state->hostVars = [];
                    }
                    $state->mark += \strlen($rx = ($prev ? ')' : '')."|{$hostRegex}(?");
                    $code .= "\n        .".self::export($rx);
                    $state->regex .= $rx;
                    $prev = true;
                }

                $tree = new StaticPrefixCollection();
                foreach ($routes->all() as $name => $route) {
                    preg_match('#^.\^(.*)\$.[a-zA-Z]*$#', $route->compile()->getRegex(), $rx);

                    $state->vars = [];
                    $regex = preg_replace_callback('#\?P<([^>]++)>#', $state->getVars, $rx[1]);
                    if ($hasTrailingSlash = '/' !== $regex && '/' === $regex[-1]) {
                        $regex = substr($regex, 0, -1);
                    }
                    $hasTrailingVar = (bool) preg_match('#\{\w+\}/?$#', $route->getPath());

                    $tree->addRoute($regex, [$name, $regex, $state->vars, $route, $hasTrailingSlash, $hasTrailingVar]);
                }

                $code .= $this->compileStaticPrefixCollection($tree, $state, 0, $conditions);
            }
            if ($matchHost) {
                $code .= "\n        .')'";
                $state->regex .= ')';
            }
            $rx = ")/?$}{$modifiers}";
            $code .= "\n        .'{$rx}',";
            $state->regex .= $rx;
            $state->markTail = 0;

            // if the regex is too large, throw a signaling exception to recompute with smaller chunk size
            set_error_handler(function ($type, $message) { throw str_contains($message, $this->signalingException->getMessage()) ? $this->signalingException : new \ErrorException($message); });
            try {
                preg_match($state->regex, '');
            } finally {
                restore_error_handler();
            }

            $regexpList[$startingMark] = $state->regex;
        }

        $state->routes[$state->mark][] = [null, null, null, null, false, false, 0];
        unset($state->getVars);

        return [$regexpList, $state->routes, $code];
    }

    /**
     * Compiles a regexp tree of subpatterns that matches nested same-prefix routes.
     *
     * @param \stdClass $state A simple state object that keeps track of the progress of the compilation,
     *                         and gathers the generated switch's "case" and "default" statements
     */
    private function compileStaticPrefixCollection(StaticPrefixCollection $tree, \stdClass $state, int $prefixLen, array &$conditions): string
    {
        $code = '';
        $prevRegex = null;
        $routes = $tree->getRoutes();

        foreach ($routes as $i => $route) {
            if ($route instanceof StaticPrefixCollection) {
                $prevRegex = null;
                $prefix = substr($route->getPrefix(), $prefixLen);
                $state->mark += \strlen($rx = "|{$prefix}(?");
                $code .= "\n            .".self::export($rx);
                $state->regex .= $rx;
                $code .= $this->indent($this->compileStaticPrefixCollection($route, $state, $prefixLen + \strlen($prefix), $conditions));
                $code .= "\n            .')'";
                $state->regex .= ')';
                ++$state->markTail;
                continue;
            }

            [$name, $regex, $vars, $route, $hasTrailingSlash, $hasTrailingVar] = $route;
            $compiledRoute = $route->compile();
            $vars = array_merge($state->hostVars, $vars);

            if ($compiledRoute->getRegex() === $prevRegex) {
                $state->routes[$state->mark][] = $this->compileRoute($route, $name, $vars, $hasTrailingSlash, $hasTrailingVar, $conditions);
                continue;
            }

            $state->mark += 3 + $state->markTail + \strlen($regex) - $prefixLen;
            $state->markTail = 2 + \strlen($state->mark);
            $rx = sprintf('|%s(*:%s)', substr($regex, $prefixLen), $state->mark);
            $code .= "\n            .".self::export($rx);
            $state->regex .= $rx;

            $prevRegex = $compiledRoute->getRegex();
            $state->routes[$state->mark] = [$this->compileRoute($route, $name, $vars, $hasTrailingSlash, $hasTrailingVar, $conditions)];
        }

        return $code;
    }

    /**
     * Compiles a single Route to PHP code used to match it against the path info.
     */
    private function compileRoute(Route $route, string $name, string|array|null $vars, bool $hasTrailingSlash, bool $hasTrailingVar, array &$conditions): array
    {
        $defaults = $route->getDefaults();

        if (isset($defaults['_canonical_route'])) {
            $name = $defaults['_canonical_route'];
            unset($defaults['_canonical_route']);
        }

        if ($condition = $route->getCondition()) {
            $condition = $this->getExpressionLanguage()->compile($condition, ['context', 'request']);
            $condition = $conditions[$condition] ?? $conditions[$condition] = (str_contains($condition, '$request') ? 1 : -1) * \count($conditions);
        } else {
            $condition = null;
        }

        return [
            ['_route' => $name] + $defaults,
            $vars,
            array_flip($route->getMethods()) ?: null,
            array_flip($route->getSchemes()) ?: null,
            $hasTrailingSlash,
            $hasTrailingVar,
            $condition,
        ];
    }

    private function getExpressionLanguage(): ExpressionLanguage
    {
        if (!isset($this->expressionLanguage)) {
            if (!class_exists(ExpressionLanguage::class)) {
                throw new \LogicException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
            }
            $this->expressionLanguage = new ExpressionLanguage(null, $this->expressionLanguageProviders);
        }

        return $this->expressionLanguage;
    }

    private function indent(string $code, int $level = 1): string
    {
        return preg_replace('/^./m', str_repeat('    ', $level).'$0', $code);
    }

    /**
     * @internal
     */
    public static function export(mixed $value): string
    {
        if (null === $value) {
            return 'null';
        }
        if (!\is_array($value)) {
            if (\is_object($value)) {
                throw new \InvalidArgumentException('Symfony\Component\Routing\Route cannot contain objects.');
            }

            return str_replace("\n", '\'."\n".\'', var_export($value, true));
        }
        if (!$value) {
            return '[]';
        }

        $i = 0;
        $export = '[';

        foreach ($value as $k => $v) {
            if ($i === $k) {
                ++$i;
            } else {
                $export .= self::export($k).' => ';

                if (\is_int($k) && $i < $k) {
                    $i = 1 + $k;
                }
            }

            $export .= self::export($v).', ';
        }

        return substr_replace($export, ']', -2);
    }
}

• [F] CompiledUrlMatcherDumper.php
  Delete
• [F] CompiledUrlMatcherTrait.php
  Delete
• [F] MatcherDumper.php
  Delete
• [F] MatcherDumperInterface.php
  Delete
• [F] StaticPrefixCollection.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