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Filename : LinkStub.php
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<?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\VarDumper\Caster;

/**
 * Represents a file or a URL.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
class LinkStub extends ConstStub
{
    public $inVendor = false;

    private static $vendorRoots;
    private static $composerRoots;

    public function __construct($label, int $line = 0, $href = null)
    {
        $this->value = $label;

        if (null === $href) {
            $href = $label;
        }
        if (!\is_string($href)) {
            return;
        }
        if (0 === strpos($href, 'file://')) {
            if ($href === $label) {
                $label = substr($label, 7);
            }
            $href = substr($href, 7);
        } elseif (false !== strpos($href, '://')) {
            $this->attr['href'] = $href;

            return;
        }
        if (!file_exists($href)) {
            return;
        }
        if ($line) {
            $this->attr['line'] = $line;
        }
        if ($label !== $this->attr['file'] = realpath($href) ?: $href) {
            return;
        }
        if ($composerRoot = $this->getComposerRoot($href, $this->inVendor)) {
            $this->attr['ellipsis'] = \strlen($href) - \strlen($composerRoot) + 1;
            $this->attr['ellipsis-type'] = 'path';
            $this->attr['ellipsis-tail'] = 1 + ($this->inVendor ? 2 + \strlen(implode('', \array_slice(explode(\DIRECTORY_SEPARATOR, substr($href, 1 - $this->attr['ellipsis'])), 0, 2))) : 0);
        } elseif (3 < \count($ellipsis = explode(\DIRECTORY_SEPARATOR, $href))) {
            $this->attr['ellipsis'] = 2 + \strlen(implode('', \array_slice($ellipsis, -2)));
            $this->attr['ellipsis-type'] = 'path';
            $this->attr['ellipsis-tail'] = 1;
        }
    }

    private function getComposerRoot($file, &$inVendor)
    {
        if (null === self::$vendorRoots) {
            self::$vendorRoots = [];

            foreach (get_declared_classes() as $class) {
                if ('C' === $class[0] && 0 === strpos($class, 'ComposerAutoloaderInit')) {
                    $r = new \ReflectionClass($class);
                    $v = \dirname(\dirname($r->getFileName()));
                    if (file_exists($v.'/composer/installed.json')) {
                        self::$vendorRoots[] = $v.\DIRECTORY_SEPARATOR;
                    }
                }
            }
        }
        $inVendor = false;

        if (isset(self::$composerRoots[$dir = \dirname($file)])) {
            return self::$composerRoots[$dir];
        }

        foreach (self::$vendorRoots as $root) {
            if ($inVendor = 0 === strpos($file, $root)) {
                return $root;
            }
        }

        $parent = $dir;
        while (!@file_exists($parent.'/composer.json')) {
            if (!@file_exists($parent)) {
                // open_basedir restriction in effect
                break;
            }
            if ($parent === \dirname($parent)) {
                return self::$composerRoots[$dir] = false;
            }

            $parent = \dirname($parent);
        }

        return self::$composerRoots[$dir] = $parent.\DIRECTORY_SEPARATOR;
    }
}