first commit

vendor/symfony/routing/Generator/CompiledUrlGenerator.php

@@ -0,0 +1,69 @@
+<?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\Generator;
+
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Routing\Exception\RouteNotFoundException;
+use Symfony\Component\Routing\RequestContext;
+
+/**
+ * Generates URLs based on rules dumped by CompiledUrlGeneratorDumper.
+ */
+class CompiledUrlGenerator extends UrlGenerator
+{
+    private array $compiledRoutes = [];
+    private ?string $defaultLocale;
+
+    public function __construct(array $compiledRoutes, RequestContext $context, ?LoggerInterface $logger = null, ?string $defaultLocale = null)
+    {
+        $this->compiledRoutes = $compiledRoutes;
+        $this->context = $context;
+        $this->logger = $logger;
+        $this->defaultLocale = $defaultLocale;
+    }
+
+    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH): string
+    {
+        $locale = $parameters['_locale']
+            ?? $this->context->getParameter('_locale')
+            ?: $this->defaultLocale;
+
+        if (null !== $locale) {
+            do {
+                if (($this->compiledRoutes[$name.'.'.$locale][1]['_canonical_route'] ?? null) === $name) {
+                    $name .= '.'.$locale;
+                    break;
+                }
+            } while (false !== $locale = strstr($locale, '_', true));
+        }
+
+        if (!isset($this->compiledRoutes[$name])) {
+            throw new RouteNotFoundException(sprintf('Unable to generate a URL for the named route "%s" as such route does not exist.', $name));
+        }
+
+        [$variables, $defaults, $requirements, $tokens, $hostTokens, $requiredSchemes, $deprecations] = $this->compiledRoutes[$name] + [6 => []];
+
+        foreach ($deprecations as $deprecation) {
+            trigger_deprecation($deprecation['package'], $deprecation['version'], $deprecation['message']);
+        }
+
+        if (isset($defaults['_canonical_route']) && isset($defaults['_locale'])) {
+            if (!\in_array('_locale', $variables, true)) {
+                unset($parameters['_locale']);
+            } elseif (!isset($parameters['_locale'])) {
+                $parameters['_locale'] = $defaults['_locale'];
+            }
+        }
+
+        return $this->doGenerate($variables, $defaults, $requirements, $tokens, $parameters, $name, $referenceType, $hostTokens, $requiredSchemes);
+    }
+}

vendor/symfony/routing/Generator/ConfigurableRequirementsInterface.php

@@ -0,0 +1,53 @@
+<?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\Generator;
+
+/**
+ * ConfigurableRequirementsInterface must be implemented by URL generators that
+ * can be configured whether an exception should be generated when the parameters
+ * do not match the requirements. It is also possible to disable the requirements
+ * check for URL generation completely.
+ *
+ * The possible configurations and use-cases:
+ * - setStrictRequirements(true): Throw an exception for mismatching requirements. This
+ *   is mostly useful in development environment.
+ * - setStrictRequirements(false): Don't throw an exception but return an empty string as URL for
+ *   mismatching requirements and log the problem. Useful when you cannot control all
+ *   params because they come from third party libs but don't want to have a 404 in
+ *   production environment. It should log the mismatch so one can review it.
+ * - setStrictRequirements(null): Return the URL with the given parameters without
+ *   checking the requirements at all. When generating a URL you should either trust
+ *   your params or you validated them beforehand because otherwise it would break your
+ *   link anyway. So in production environment you should know that params always pass
+ *   the requirements. Thus this option allows to disable the check on URL generation for
+ *   performance reasons (saving a preg_match for each requirement every time a URL is
+ *   generated).
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Tobias Schultze <http://tobion.de>
+ */
+interface ConfigurableRequirementsInterface
+{
+    /**
+     * Enables or disables the exception on incorrect parameters.
+     * Passing null will deactivate the requirements check completely.
+     *
+     * @return void
+     */
+    public function setStrictRequirements(?bool $enabled);
+
+    /**
+     * Returns whether to throw an exception on incorrect parameters.
+     * Null means the requirements check is deactivated completely.
+     */
+    public function isStrictRequirements(): ?bool;
+}

vendor/symfony/routing/Generator/Dumper/CompiledUrlGeneratorDumper.php

@@ -0,0 +1,121 @@
+<?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\Generator\Dumper;
+
+use Symfony\Component\Routing\Exception\RouteCircularReferenceException;
+use Symfony\Component\Routing\Exception\RouteNotFoundException;
+use Symfony\Component\Routing\Matcher\Dumper\CompiledUrlMatcherDumper;
+
+/**
+ * CompiledUrlGeneratorDumper creates a PHP array to be used with CompiledUrlGenerator.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Tobias Schultze <http://tobion.de>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class CompiledUrlGeneratorDumper extends GeneratorDumper
+{
+    public function getCompiledRoutes(): array
+    {
+        $compiledRoutes = [];
+        foreach ($this->getRoutes()->all() as $name => $route) {
+            $compiledRoute = $route->compile();
+
+            $compiledRoutes[$name] = [
+                $compiledRoute->getVariables(),
+                $route->getDefaults(),
+                $route->getRequirements(),
+                $compiledRoute->getTokens(),
+                $compiledRoute->getHostTokens(),
+                $route->getSchemes(),
+                [],
+            ];
+        }
+
+        return $compiledRoutes;
+    }
+
+    public function getCompiledAliases(): array
+    {
+        $routes = $this->getRoutes();
+        $compiledAliases = [];
+        foreach ($routes->getAliases() as $name => $alias) {
+            $deprecations = $alias->isDeprecated() ? [$alias->getDeprecation($name)] : [];
+            $currentId = $alias->getId();
+            $visited = [];
+            while (null !== $alias = $routes->getAlias($currentId) ?? null) {
+                if (false !== $searchKey = array_search($currentId, $visited)) {
+                    $visited[] = $currentId;
+
+                    throw new RouteCircularReferenceException($currentId, \array_slice($visited, $searchKey));
+                }
+
+                if ($alias->isDeprecated()) {
+                    $deprecations[] = $deprecation = $alias->getDeprecation($currentId);
+                    trigger_deprecation($deprecation['package'], $deprecation['version'], $deprecation['message']);
+                }
+
+                $visited[] = $currentId;
+                $currentId = $alias->getId();
+            }
+
+            if (null === $target = $routes->get($currentId)) {
+                throw new RouteNotFoundException(sprintf('Target route "%s" for alias "%s" does not exist.', $currentId, $name));
+            }
+
+            $compiledTarget = $target->compile();
+
+            $compiledAliases[$name] = [
+                $compiledTarget->getVariables(),
+                $target->getDefaults(),
+                $target->getRequirements(),
+                $compiledTarget->getTokens(),
+                $compiledTarget->getHostTokens(),
+                $target->getSchemes(),
+                $deprecations,
+            ];
+        }
+
+        return $compiledAliases;
+    }
+
+    public function dump(array $options = []): string
+    {
+        return <<<EOF
+<?php
+
+// This file has been auto-generated by the Symfony Routing Component.
+
+return [{$this->generateDeclaredRoutes()}
+];
+
+EOF;
+    }
+
+    /**
+     * Generates PHP code representing an array of defined routes
+     * together with the routes properties (e.g. requirements).
+     */
+    private function generateDeclaredRoutes(): string
+    {
+        $routes = '';
+        foreach ($this->getCompiledRoutes() as $name => $properties) {
+            $routes .= sprintf("\n    '%s' => %s,", $name, CompiledUrlMatcherDumper::export($properties));
+        }
+
+        foreach ($this->getCompiledAliases() as $alias => $properties) {
+            $routes .= sprintf("\n    '%s' => %s,", $alias, CompiledUrlMatcherDumper::export($properties));
+        }
+
+        return $routes;
+    }
+}

vendor/symfony/routing/Generator/Dumper/GeneratorDumper.php

@@ -0,0 +1,34 @@
+<?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\Generator\Dumper;
+
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * GeneratorDumper is the base class for all built-in generator dumpers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class GeneratorDumper implements GeneratorDumperInterface
+{
+    private RouteCollection $routes;
+
+    public function __construct(RouteCollection $routes)
+    {
+        $this->routes = $routes;
+    }
+
+    public function getRoutes(): RouteCollection
+    {
+        return $this->routes;
+    }
+}

vendor/symfony/routing/Generator/Dumper/GeneratorDumperInterface.php

@@ -0,0 +1,33 @@
+<?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\Generator\Dumper;
+
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * GeneratorDumperInterface is the interface that all generator dumper classes must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface GeneratorDumperInterface
+{
+    /**
+     * Dumps a set of routes to a string representation of executable code
+     * that can then be used to generate a URL of such a route.
+     */
+    public function dump(array $options = []): string;
+
+    /**
+     * Gets the routes to dump.
+     */
+    public function getRoutes(): RouteCollection;
+}

vendor/symfony/routing/Generator/UrlGenerator.php

@@ -0,0 +1,358 @@
+<?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\Generator;
+
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Routing\Exception\InvalidParameterException;
+use Symfony\Component\Routing\Exception\MissingMandatoryParametersException;
+use Symfony\Component\Routing\Exception\RouteNotFoundException;
+use Symfony\Component\Routing\RequestContext;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * UrlGenerator can generate a URL or a path for any route in the RouteCollection
+ * based on the passed parameters.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Tobias Schultze <http://tobion.de>
+ */
+class UrlGenerator implements UrlGeneratorInterface, ConfigurableRequirementsInterface
+{
+    private const QUERY_FRAGMENT_DECODED = [
+        // RFC 3986 explicitly allows those in the query/fragment to reference other URIs unencoded
+        '%2F' => '/',
+        '%252F' => '%2F',
+        '%3F' => '?',
+        // reserved chars that have no special meaning for HTTP URIs in a query or fragment
+        // this excludes esp. "&", "=" and also "+" because PHP would treat it as a space (form-encoded)
+        '%40' => '@',
+        '%3A' => ':',
+        '%21' => '!',
+        '%3B' => ';',
+        '%2C' => ',',
+        '%2A' => '*',
+    ];
+
+    protected $routes;
+    protected $context;
+
+    /**
+     * @var bool|null
+     */
+    protected $strictRequirements = true;
+
+    protected $logger;
+
+    private ?string $defaultLocale;
+
+    /**
+     * This array defines the characters (besides alphanumeric ones) that will not be percent-encoded in the path segment of the generated URL.
+     *
+     * PHP's rawurlencode() encodes all chars except "a-zA-Z0-9-._~" according to RFC 3986. But we want to allow some chars
+     * to be used in their literal form (reasons below). Other chars inside the path must of course be encoded, e.g.
+     * "?" and "#" (would be interpreted wrongly as query and fragment identifier),
+     * "'" and """ (are used as delimiters in HTML).
+     */
+    protected $decodedChars = [
+        // the slash can be used to designate a hierarchical structure and we want allow using it with this meaning
+        // some webservers don't allow the slash in encoded form in the path for security reasons anyway
+        // see http://stackoverflow.com/questions/4069002/http-400-if-2f-part-of-get-url-in-jboss
+        '%2F' => '/',
+        '%252F' => '%2F',
+        // the following chars are general delimiters in the URI specification but have only special meaning in the authority component
+        // so they can safely be used in the path in unencoded form
+        '%40' => '@',
+        '%3A' => ':',
+        // these chars are only sub-delimiters that have no predefined meaning and can therefore be used literally
+        // so URI producing applications can use these chars to delimit subcomponents in a path segment without being encoded for better readability
+        '%3B' => ';',
+        '%2C' => ',',
+        '%3D' => '=',
+        '%2B' => '+',
+        '%21' => '!',
+        '%2A' => '*',
+        '%7C' => '|',
+    ];
+
+    public function __construct(RouteCollection $routes, RequestContext $context, ?LoggerInterface $logger = null, ?string $defaultLocale = null)
+    {
+        $this->routes = $routes;
+        $this->context = $context;
+        $this->logger = $logger;
+        $this->defaultLocale = $defaultLocale;
+    }
+
+    /**
+     * @return void
+     */
+    public function setContext(RequestContext $context)
+    {
+        $this->context = $context;
+    }
+
+    public function getContext(): RequestContext
+    {
+        return $this->context;
+    }
+
+    /**
+     * @return void
+     */
+    public function setStrictRequirements(?bool $enabled)
+    {
+        $this->strictRequirements = $enabled;
+    }
+
+    public function isStrictRequirements(): ?bool
+    {
+        return $this->strictRequirements;
+    }
+
+    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH): string
+    {
+        $route = null;
+        $locale = $parameters['_locale'] ?? $this->context->getParameter('_locale') ?: $this->defaultLocale;
+
+        if (null !== $locale) {
+            do {
+                if (null !== ($route = $this->routes->get($name.'.'.$locale)) && $route->getDefault('_canonical_route') === $name) {
+                    break;
+                }
+            } while (false !== $locale = strstr($locale, '_', true));
+        }
+
+        if (null === $route ??= $this->routes->get($name)) {
+            throw new RouteNotFoundException(sprintf('Unable to generate a URL for the named route "%s" as such route does not exist.', $name));
+        }
+
+        // the Route has a cache of its own and is not recompiled as long as it does not get modified
+        $compiledRoute = $route->compile();
+
+        $defaults = $route->getDefaults();
+        $variables = $compiledRoute->getVariables();
+
+        if (isset($defaults['_canonical_route']) && isset($defaults['_locale'])) {
+            if (!\in_array('_locale', $variables, true)) {
+                unset($parameters['_locale']);
+            } elseif (!isset($parameters['_locale'])) {
+                $parameters['_locale'] = $defaults['_locale'];
+            }
+        }
+
+        return $this->doGenerate($variables, $defaults, $route->getRequirements(), $compiledRoute->getTokens(), $parameters, $name, $referenceType, $compiledRoute->getHostTokens(), $route->getSchemes());
+    }
+
+    /**
+     * @throws MissingMandatoryParametersException When some parameters are missing that are mandatory for the route
+     * @throws InvalidParameterException           When a parameter value for a placeholder is not correct because
+     *                                             it does not match the requirement
+     */
+    protected function doGenerate(array $variables, array $defaults, array $requirements, array $tokens, array $parameters, string $name, int $referenceType, array $hostTokens, array $requiredSchemes = []): string
+    {
+        $variables = array_flip($variables);
+        $mergedParams = array_replace($defaults, $this->context->getParameters(), $parameters);
+
+        // all params must be given
+        if ($diff = array_diff_key($variables, $mergedParams)) {
+            throw new MissingMandatoryParametersException($name, array_keys($diff));
+        }
+
+        $url = '';
+        $optional = true;
+        $message = 'Parameter "{parameter}" for route "{route}" must match "{expected}" ("{given}" given) to generate a corresponding URL.';
+        foreach ($tokens as $token) {
+            if ('variable' === $token[0]) {
+                $varName = $token[3];
+                // variable is not important by default
+                $important = $token[5] ?? false;
+
+                if (!$optional || $important || !\array_key_exists($varName, $defaults) || (null !== $mergedParams[$varName] && (string) $mergedParams[$varName] !== (string) $defaults[$varName])) {
+                    // check requirement (while ignoring look-around patterns)
+                    if (null !== $this->strictRequirements && !preg_match('#^'.preg_replace('/\(\?(?:=|<=|!|<!)((?:[^()\\\\]+|\\\\.|\((?1)\))*)\)/', '', $token[2]).'$#i'.(empty($token[4]) ? '' : 'u'), $mergedParams[$token[3]] ?? '')) {
+                        if ($this->strictRequirements) {
+                            throw new InvalidParameterException(strtr($message, ['{parameter}' => $varName, '{route}' => $name, '{expected}' => $token[2], '{given}' => $mergedParams[$varName]]));
+                        }
+
+                        $this->logger?->error($message, ['parameter' => $varName, 'route' => $name, 'expected' => $token[2], 'given' => $mergedParams[$varName]]);
+
+                        return '';
+                    }
+
+                    $url = $token[1].$mergedParams[$varName].$url;
+                    $optional = false;
+                }
+            } else {
+                // static text
+                $url = $token[1].$url;
+                $optional = false;
+            }
+        }
+
+        if ('' === $url) {
+            $url = '/';
+        }
+
+        // the contexts base URL is already encoded (see Symfony\Component\HttpFoundation\Request)
+        $url = strtr(rawurlencode($url), $this->decodedChars);
+
+        // the path segments "." and ".." are interpreted as relative reference when resolving a URI; see http://tools.ietf.org/html/rfc3986#section-3.3
+        // so we need to encode them as they are not used for this purpose here
+        // otherwise we would generate a URI that, when followed by a user agent (e.g. browser), does not match this route
+        $url = strtr($url, ['/../' => '/%2E%2E/', '/./' => '/%2E/']);
+        if (str_ends_with($url, '/..')) {
+            $url = substr($url, 0, -2).'%2E%2E';
+        } elseif (str_ends_with($url, '/.')) {
+            $url = substr($url, 0, -1).'%2E';
+        }
+
+        $schemeAuthority = '';
+        $host = $this->context->getHost();
+        $scheme = $this->context->getScheme();
+
+        if ($requiredSchemes) {
+            if (!\in_array($scheme, $requiredSchemes, true)) {
+                $referenceType = self::ABSOLUTE_URL;
+                $scheme = current($requiredSchemes);
+            }
+        }
+
+        if ($hostTokens) {
+            $routeHost = '';
+            foreach ($hostTokens as $token) {
+                if ('variable' === $token[0]) {
+                    // check requirement (while ignoring look-around patterns)
+                    if (null !== $this->strictRequirements && !preg_match('#^'.preg_replace('/\(\?(?:=|<=|!|<!)((?:[^()\\\\]+|\\\\.|\((?1)\))*)\)/', '', $token[2]).'$#i'.(empty($token[4]) ? '' : 'u'), $mergedParams[$token[3]])) {
+                        if ($this->strictRequirements) {
+                            throw new InvalidParameterException(strtr($message, ['{parameter}' => $token[3], '{route}' => $name, '{expected}' => $token[2], '{given}' => $mergedParams[$token[3]]]));
+                        }
+
+                        $this->logger?->error($message, ['parameter' => $token[3], 'route' => $name, 'expected' => $token[2], 'given' => $mergedParams[$token[3]]]);
+
+                        return '';
+                    }
+
+                    $routeHost = $token[1].$mergedParams[$token[3]].$routeHost;
+                } else {
+                    $routeHost = $token[1].$routeHost;
+                }
+            }
+
+            if ($routeHost !== $host) {
+                $host = $routeHost;
+                if (self::ABSOLUTE_URL !== $referenceType) {
+                    $referenceType = self::NETWORK_PATH;
+                }
+            }
+        }
+
+        if (self::ABSOLUTE_URL === $referenceType || self::NETWORK_PATH === $referenceType) {
+            if ('' !== $host || ('' !== $scheme && 'http' !== $scheme && 'https' !== $scheme)) {
+                $port = '';
+                if ('http' === $scheme && 80 !== $this->context->getHttpPort()) {
+                    $port = ':'.$this->context->getHttpPort();
+                } elseif ('https' === $scheme && 443 !== $this->context->getHttpsPort()) {
+                    $port = ':'.$this->context->getHttpsPort();
+                }
+
+                $schemeAuthority = self::NETWORK_PATH === $referenceType || '' === $scheme ? '//' : "$scheme://";
+                $schemeAuthority .= $host.$port;
+            }
+        }
+
+        if (self::RELATIVE_PATH === $referenceType) {
+            $url = self::getRelativePath($this->context->getPathInfo(), $url);
+        } else {
+            $url = $schemeAuthority.$this->context->getBaseUrl().$url;
+        }
+
+        // add a query string if needed
+        $extra = array_udiff_assoc(array_diff_key($parameters, $variables), $defaults, fn ($a, $b) => $a == $b ? 0 : 1);
+
+        array_walk_recursive($extra, $caster = static function (&$v) use (&$caster) {
+            if (\is_object($v)) {
+                if ($vars = get_object_vars($v)) {
+                    array_walk_recursive($vars, $caster);
+                    $v = $vars;
+                } elseif (method_exists($v, '__toString')) {
+                    $v = (string) $v;
+                }
+            }
+        });
+
+        // extract fragment
+        $fragment = $defaults['_fragment'] ?? '';
+
+        if (isset($extra['_fragment'])) {
+            $fragment = $extra['_fragment'];
+            unset($extra['_fragment']);
+        }
+
+        if ($extra && $query = http_build_query($extra, '', '&', \PHP_QUERY_RFC3986)) {
+            $url .= '?'.strtr($query, self::QUERY_FRAGMENT_DECODED);
+        }
+
+        if ('' !== $fragment) {
+            $url .= '#'.strtr(rawurlencode($fragment), self::QUERY_FRAGMENT_DECODED);
+        }
+
+        return $url;
+    }
+
+    /**
+     * Returns the target path as relative reference from the base path.
+     *
+     * Only the URIs path component (no schema, host etc.) is relevant and must be given, starting with a slash.
+     * Both paths must be absolute and not contain relative parts.
+     * Relative URLs from one resource to another are useful when generating self-contained downloadable document archives.
+     * Furthermore, they can be used to reduce the link size in documents.
+     *
+     * Example target paths, given a base path of "/a/b/c/d":
+     * - "/a/b/c/d"     -> ""
+     * - "/a/b/c/"      -> "./"
+     * - "/a/b/"        -> "../"
+     * - "/a/b/c/other" -> "other"
+     * - "/a/x/y"       -> "../../x/y"
+     *
+     * @param string $basePath   The base path
+     * @param string $targetPath The target path
+     */
+    public static function getRelativePath(string $basePath, string $targetPath): string
+    {
+        if ($basePath === $targetPath) {
+            return '';
+        }
+
+        $sourceDirs = explode('/', isset($basePath[0]) && '/' === $basePath[0] ? substr($basePath, 1) : $basePath);
+        $targetDirs = explode('/', isset($targetPath[0]) && '/' === $targetPath[0] ? substr($targetPath, 1) : $targetPath);
+        array_pop($sourceDirs);
+        $targetFile = array_pop($targetDirs);
+
+        foreach ($sourceDirs as $i => $dir) {
+            if (isset($targetDirs[$i]) && $dir === $targetDirs[$i]) {
+                unset($sourceDirs[$i], $targetDirs[$i]);
+            } else {
+                break;
+            }
+        }
+
+        $targetDirs[] = $targetFile;
+        $path = str_repeat('../', \count($sourceDirs)).implode('/', $targetDirs);
+
+        // A reference to the same base directory or an empty subdirectory must be prefixed with "./".
+        // This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used
+        // as the first segment of a relative-path reference, as it would be mistaken for a scheme name
+        // (see http://tools.ietf.org/html/rfc3986#section-4.2).
+        return '' === $path || '/' === $path[0]
+            || false !== ($colonPos = strpos($path, ':')) && ($colonPos < ($slashPos = strpos($path, '/')) || false === $slashPos)
+            ? "./$path" : $path;
+    }
+}

vendor/symfony/routing/Generator/UrlGeneratorInterface.php

@@ -0,0 +1,80 @@
+<?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\Generator;
+
+use Symfony\Component\Routing\Exception\InvalidParameterException;
+use Symfony\Component\Routing\Exception\MissingMandatoryParametersException;
+use Symfony\Component\Routing\Exception\RouteNotFoundException;
+use Symfony\Component\Routing\RequestContextAwareInterface;
+
+/**
+ * UrlGeneratorInterface is the interface that all URL generator classes must implement.
+ *
+ * The constants in this interface define the different types of resource references that
+ * are declared in RFC 3986: http://tools.ietf.org/html/rfc3986
+ * We are using the term "URL" instead of "URI" as this is more common in web applications
+ * and we do not need to distinguish them as the difference is mostly semantical and
+ * less technical. Generating URIs, i.e. representation-independent resource identifiers,
+ * is also possible.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Tobias Schultze <http://tobion.de>
+ */
+interface UrlGeneratorInterface extends RequestContextAwareInterface
+{
+    /**
+     * Generates an absolute URL, e.g. "http://example.com/dir/file".
+     */
+    public const ABSOLUTE_URL = 0;
+
+    /**
+     * Generates an absolute path, e.g. "/dir/file".
+     */
+    public const ABSOLUTE_PATH = 1;
+
+    /**
+     * Generates a relative path based on the current request path, e.g. "../parent-file".
+     *
+     * @see UrlGenerator::getRelativePath()
+     */
+    public const RELATIVE_PATH = 2;
+
+    /**
+     * Generates a network path, e.g. "//example.com/dir/file".
+     * Such reference reuses the current scheme but specifies the host.
+     */
+    public const NETWORK_PATH = 3;
+
+    /**
+     * Generates a URL or path for a specific route based on the given parameters.
+     *
+     * Parameters that reference placeholders in the route pattern will substitute them in the
+     * path or host. Extra params are added as query string to the URL.
+     *
+     * When the passed reference type cannot be generated for the route because it requires a different
+     * host or scheme than the current one, the method will return a more comprehensive reference
+     * that includes the required params. For example, when you call this method with $referenceType = ABSOLUTE_PATH
+     * but the route requires the https scheme whereas the current scheme is http, it will instead return an
+     * ABSOLUTE_URL with the https scheme and the current host. This makes sure the generated URL matches
+     * the route in any case.
+     *
+     * If there is no route with the given name, the generator must throw the RouteNotFoundException.
+     *
+     * The special parameter _fragment will be used as the document fragment suffixed to the final URL.
+     *
+     * @throws RouteNotFoundException              If the named route doesn't exist
+     * @throws MissingMandatoryParametersException When some parameters are missing that are mandatory for the route
+     * @throws InvalidParameterException           When a parameter value for a placeholder is not correct because
+     *                                             it does not match the requirement
+     */
+    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH): string;
+}