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Edit File : StaticPrefixCollection.php \| Size : 6.71 KB
<?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\Routing\RouteCollection; /* * Prefix tree of routes preserving routes order. * * @author Frank de Jonge <info@frankdejonge.nl> * @author Nicolas Grekas <p@tchwork.com> * * @internal / class StaticPrefixCollection { private $prefix; /* * @var string[] / private $staticPrefixes = []; /* * @var string[] / private $prefixes = []; /* * @var array[]\|self[] / private $items = []; public function __construct(string $prefix = '/') { $this->prefix = $prefix; } public function getPrefix(): string { return $this->prefix; } /* * @return array[]\|self[] / public function getRoutes(): array { return $this->items; } /* * Adds a route to a group. * * @param array\|self $route / public function addRoute(string $prefix, $route) { list($prefix, $staticPrefix) = $this->getCommonPrefix($prefix, $prefix); for ($i = \count($this->items) - 1; 0 <= $i; --$i) { $item = $this->items[$i]; list($commonPrefix, $commonStaticPrefix) = $this->getCommonPrefix($prefix, $this->prefixes[$i]); if ($this->prefix === $commonPrefix) { // the new route and a previous one have no common prefix, let's see if they are exclusive to each others if ($this->prefix !== $staticPrefix && $this->prefix !== $this->staticPrefixes[$i]) { // the new route and the previous one have exclusive static prefixes continue; } if ($this->prefix === $staticPrefix && $this->prefix === $this->staticPrefixes[$i]) { // the new route and the previous one have no static prefix break; } if ($this->prefixes[$i] !== $this->staticPrefixes[$i] && $this->prefix === $this->staticPrefixes[$i]) { // the previous route is non-static and has no static prefix break; } if ($prefix !== $staticPrefix && $this->prefix === $staticPrefix) { // the new route is non-static and has no static prefix break; } continue; } if ($item instanceof self && $this->prefixes[$i] === $commonPrefix) { // the new route is a child of a previous one, let's nest it $item->addRoute($prefix, $route); } else { // the new route and a previous one have a common prefix, let's merge them $child = new self($commonPrefix); list($child->prefixes[0], $child->staticPrefixes[0]) = $child->getCommonPrefix($this->prefixes[$i], $this->prefixes[$i]); list($child->prefixes[1], $child->staticPrefixes[1]) = $child->getCommonPrefix($prefix, $prefix); $child->items = [$this->items[$i], $route]; $this->staticPrefixes[$i] = $commonStaticPrefix; $this->prefixes[$i] = $commonPrefix; $this->items[$i] = $child; } return; } // No optimised case was found, in this case we simple add the route for possible // grouping when new routes are added. $this->staticPrefixes[] = $staticPrefix; $this->prefixes[] = $prefix; $this->items[] = $route; } /* * Linearizes back a set of nested routes into a collection. / public function populateCollection(RouteCollection $routes): RouteCollection { foreach ($this->items as $route) { if ($route instanceof self) { $route->populateCollection($routes); } else { $routes->add(...$route); } } return $routes; } /* * Gets the full and static common prefixes between two route patterns. * * The static prefix stops at last at the first opening bracket. */ private function getCommonPrefix(string $prefix, string $anotherPrefix): array { $baseLength = \strlen($this->prefix); $end = min(\strlen($prefix), \strlen($anotherPrefix)); $staticLength = null; set_error_handler([__CLASS__, 'handleError']); for ($i = $baseLength; $i < $end && $prefix[$i] === $anotherPrefix[$i]; ++$i) { if ('(' === $prefix[$i]) { $staticLength = $staticLength ?? $i; for ($j = 1 + $i, $n = 1; $j < $end && 0 < $n; ++$j) { if ($prefix[$j] !== $anotherPrefix[$j]) { break 2; } if ('(' === $prefix[$j]) { ++$n; } elseif (')' === $prefix[$j]) { --$n; } elseif ('\\' === $prefix[$j] && (++$j === $end \|\| $prefix[$j] !== $anotherPrefix[$j])) { --$j; break; } } if (0 < $n) { break; } if (('?' === ($prefix[$j] ?? '') \|\| '?' === ($anotherPrefix[$j] ?? '')) && ($prefix[$j] ?? '') !== ($anotherPrefix[$j] ?? '')) { break; } $subPattern = substr($prefix, $i, $j - $i); if ($prefix !== $anotherPrefix && !preg_match('/^\(\[[^\]]++\]\+\+\)$/', $subPattern) && !preg_match('{(?<!'.$subPattern.')}', '')) { // sub-patterns of variable length are not considered as common prefixes because their greediness would break in-order matching break; } $i = $j - 1; } elseif ('\\' === $prefix[$i] && (++$i === $end \|\| $prefix[$i] !== $anotherPrefix[$i])) { --$i; break; } } restore_error_handler(); if ($i < $end && 0b10 === (\ord($prefix[$i]) >> 6) && preg_match('//u', $prefix.' '.$anotherPrefix)) { do { // Prevent cutting in the middle of an UTF-8 characters --$i; } while (0b10 === (\ord($prefix[$i]) >> 6)); } return [substr($prefix, 0, $i), substr($prefix, 0, $staticLength ?? $i)]; } public static function handleError($type, $msg) { return false !== strpos($msg, 'Compilation failed: lookbehind assertion is not fixed length'); } } Back

Edit File : StaticPrefixCollection.php | Size : 6.71 KB

<?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\Routing\RouteCollection;

/**
 * Prefix tree of routes preserving routes order.
 *
 * @author Frank de Jonge <info@frankdejonge.nl>
 * @author Nicolas Grekas <p@tchwork.com>
 *
 * @internal
 */
class StaticPrefixCollection
{
    private $prefix;

/**
     * @var string[]
     */
    private $staticPrefixes = [];

/**
     * @var string[]
     */
    private $prefixes = [];

/**
     * @var array[]|self[]
     */
    private $items = [];

public function __construct(string $prefix = '/')
    {
        $this->prefix = $prefix;
    }

public function getPrefix(): string
    {
        return $this->prefix;
    }

/**
     * @return array[]|self[]
     */
    public function getRoutes(): array
    {
        return $this->items;
    }

/**
     * Adds a route to a group.
     *
     * @param array|self $route
     */
    public function addRoute(string $prefix, $route)
    {
        list($prefix, $staticPrefix) = $this->getCommonPrefix($prefix, $prefix);

for ($i = \count($this->items) - 1; 0 <= $i; --$i) {
            $item = $this->items[$i];

list($commonPrefix, $commonStaticPrefix) = $this->getCommonPrefix($prefix, $this->prefixes[$i]);

if ($this->prefix === $commonPrefix) {
                // the new route and a previous one have no common prefix, let's see if they are exclusive to each others

if ($this->prefix !== $staticPrefix && $this->prefix !== $this->staticPrefixes[$i]) {
                    // the new route and the previous one have exclusive static prefixes
                    continue;
                }

if ($this->prefix === $staticPrefix && $this->prefix === $this->staticPrefixes[$i]) {
                    // the new route and the previous one have no static prefix
                    break;
                }

if ($this->prefixes[$i] !== $this->staticPrefixes[$i] && $this->prefix === $this->staticPrefixes[$i]) {
                    // the previous route is non-static and has no static prefix
                    break;
                }

if ($prefix !== $staticPrefix && $this->prefix === $staticPrefix) {
                    // the new route is non-static and has no static prefix
                    break;
                }

continue;
            }

if ($item instanceof self && $this->prefixes[$i] === $commonPrefix) {
                // the new route is a child of a previous one, let's nest it
                $item->addRoute($prefix, $route);
            } else {
                // the new route and a previous one have a common prefix, let's merge them
                $child = new self($commonPrefix);
                list($child->prefixes[0], $child->staticPrefixes[0]) = $child->getCommonPrefix($this->prefixes[$i], $this->prefixes[$i]);
                list($child->prefixes[1], $child->staticPrefixes[1]) = $child->getCommonPrefix($prefix, $prefix);
                $child->items = [$this->items[$i], $route];

$this->staticPrefixes[$i] = $commonStaticPrefix;
                $this->prefixes[$i] = $commonPrefix;
                $this->items[$i] = $child;
            }

return;
        }

// No optimised case was found, in this case we simple add the route for possible
        // grouping when new routes are added.
        $this->staticPrefixes[] = $staticPrefix;
        $this->prefixes[] = $prefix;
        $this->items[] = $route;
    }

/**
     * Linearizes back a set of nested routes into a collection.
     */
    public function populateCollection(RouteCollection $routes): RouteCollection
    {
        foreach ($this->items as $route) {
            if ($route instanceof self) {
                $route->populateCollection($routes);
            } else {
                $routes->add(...$route);
            }
        }

return $routes;
    }

/**
     * Gets the full and static common prefixes between two route patterns.
     *
     * The static prefix stops at last at the first opening bracket.
     */
    private function getCommonPrefix(string $prefix, string $anotherPrefix): array
    {
        $baseLength = \strlen($this->prefix);
        $end = min(\strlen($prefix), \strlen($anotherPrefix));
        $staticLength = null;
        set_error_handler([__CLASS__, 'handleError']);

for ($i = $baseLength; $i < $end && $prefix[$i] === $anotherPrefix[$i]; ++$i) {
            if ('(' === $prefix[$i]) {
                $staticLength = $staticLength ?? $i;
                for ($j = 1 + $i, $n = 1; $j < $end && 0 < $n; ++$j) {
                    if ($prefix[$j] !== $anotherPrefix[$j]) {
                        break 2;
                    }
                    if ('(' === $prefix[$j]) {
                        ++$n;
                    } elseif (')' === $prefix[$j]) {
                        --$n;
                    } elseif ('\\' === $prefix[$j] && (++$j === $end || $prefix[$j] !== $anotherPrefix[$j])) {
                        --$j;
                        break;
                    }
                }
                if (0 < $n) {
                    break;
                }
                if (('?' === ($prefix[$j] ?? '') || '?' === ($anotherPrefix[$j] ?? '')) && ($prefix[$j] ?? '') !== ($anotherPrefix[$j] ?? '')) {
                    break;
                }
                $subPattern = substr($prefix, $i, $j - $i);
                if ($prefix !== $anotherPrefix && !preg_match('/^$\[[^\]]++\]\+\+$$/', $subPattern) && !preg_match('{(?<!'.$subPattern.')}', '')) {
                    // sub-patterns of variable length are not considered as common prefixes because their greediness would break in-order matching
                    break;
                }
                $i = $j - 1;
            } elseif ('\\' === $prefix[$i] && (++$i === $end || $prefix[$i] !== $anotherPrefix[$i])) {
                --$i;
                break;
            }
        }
        restore_error_handler();
        if ($i < $end && 0b10 === (\ord($prefix[$i]) >> 6) && preg_match('//u', $prefix.' '.$anotherPrefix)) {
            do {
                // Prevent cutting in the middle of an UTF-8 characters
                --$i;
            } while (0b10 === (\ord($prefix[$i]) >> 6));
        }

return [substr($prefix, 0, $i), substr($prefix, 0, $staticLength ?? $i)];
    }

public static function handleError($type, $msg)
    {
        return false !== strpos($msg, 'Compilation failed: lookbehind assertion is not fixed length');
    }
}

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