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<?php /* * This file is part of Twig. * * (c) Fabien Potencier * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Twig\Loader; use Twig\Error\LoaderError; use Twig\Source; /** * Loads template from the filesystem. * * @author Fabien Potencier <fabien@symfony.com> */ class FilesystemLoader implements LoaderInterface, ExistsLoaderInterface, SourceContextLoaderInterface { /** Identifier of the main namespace. */ const MAIN_NAMESPACE = '__main__'; protected $paths = []; protected $cache = []; protected $errorCache = []; private $rootPath; /** * @param string|array $paths A path or an array of paths where to look for templates * @param string|null $rootPath The root path common to all relative paths (null for getcwd()) */ public function __construct($paths = [], string $rootPath = null) { $this->rootPath = (null === $rootPath ? getcwd() : $rootPath).\DIRECTORY_SEPARATOR; if (false !== $realPath = realpath($rootPath)) { $this->rootPath = $realPath.\DIRECTORY_SEPARATOR; } if ($paths) { $this->setPaths($paths); } } /** * Returns the paths to the templates. * * @param string $namespace A path namespace * * @return array The array of paths where to look for templates */ public function getPaths($namespace = self::MAIN_NAMESPACE) { return isset($this->paths[$namespace]) ? $this->paths[$namespace] : []; } /** * Returns the path namespaces. * * The main namespace is always defined. * * @return array The array of defined namespaces */ public function getNamespaces() { return array_keys($this->paths); } /** * Sets the paths where templates are stored. * * @param string|array $paths A path or an array of paths where to look for templates * @param string $namespace A path namespace */ public function setPaths($paths, $namespace = self::MAIN_NAMESPACE) { if (!\is_array($paths)) { $paths = [$paths]; } $this->paths[$namespace] = []; foreach ($paths as $path) { $this->addPath($path, $namespace); } } /** * Adds a path where templates are stored. * * @param string $path A path where to look for templates * @param string $namespace A path namespace * * @throws LoaderError */ public function addPath($path, $namespace = self::MAIN_NAMESPACE) { // invalidate the cache $this->cache = $this->errorCache = []; $checkPath = $this->isAbsolutePath($path) ? $path : $this->rootPath.$path; if (!is_dir($checkPath)) { throw new LoaderError(sprintf('The "%s" directory does not exist ("%s").', $path, $checkPath)); } $this->paths[$namespace][] = rtrim($path, '/\\'); } /** * Prepends a path where templates are stored. * * @param string $path A path where to look for templates * @param string $namespace A path namespace * * @throws LoaderError */ public function prependPath($path, $namespace = self::MAIN_NAMESPACE) { // invalidate the cache $this->cache = $this->errorCache = []; $checkPath = $this->isAbsolutePath($path) ? $path : $this->rootPath.$path; if (!is_dir($checkPath)) { throw new LoaderError(sprintf('The "%s" directory does not exist ("%s").', $path, $checkPath)); } $path = rtrim($path, '/\\'); if (!isset($this->paths[$namespace])) { $this->paths[$namespace][] = $path; } else { array_unshift($this->paths[$namespace], $path); } } public function getSourceContext($name) { if (null === ($path = $this->findTemplate($name)) || false === $path) { return new Source('', $name, ''); } return new Source(file_get_contents($path), $name, $path); } public function getCacheKey($name) { if (null === ($path = $this->findTemplate($name)) || false === $path) { return ''; } $len = \strlen($this->rootPath); if (0 === strncmp($this->rootPath, $path, $len)) { return substr($path, $len); } return $path; } public function exists($name) { $name = $this->normalizeName($name); if (isset($this->cache[$name])) { return true; } return null !== ($path = $this->findTemplate($name, false)) && false !== $path; } public function isFresh($name, $time) { // false support to be removed in 3.0 if (null === ($path = $this->findTemplate($name)) || false === $path) { return false; } return filemtime($path) < $time; } /** * Checks if the template can be found. * * In Twig 3.0, findTemplate must return a string or null (returning false won't work anymore). * * @param string $name The template name * @param bool $throw Whether to throw an exception when an error occurs * * @return string|false|null The template name or false/null */ protected function findTemplate($name, $throw = true) { $name = $this->normalizeName($name); if (isset($this->cache[$name])) { return $this->cache[$name]; } if (isset($this->errorCache[$name])) { if (!$throw) { return false; } throw new LoaderError($this->errorCache[$name]); } try { $this->validateName($name); list($namespace, $shortname) = $this->parseName($name); } catch (LoaderError $e) { if (!$throw) { return false; } throw $e; } if (!isset($this->paths[$namespace])) { $this->errorCache[$name] = sprintf('There are no registered paths for namespace "%s".', $namespace); if (!$throw) { return false; } throw new LoaderError($this->errorCache[$name]); } foreach ($this->paths[$namespace] as $path) { if (!$this->isAbsolutePath($path)) { $path = $this->rootPath.$path; } if (is_file($path.'/'.$shortname)) { if (false !== $realpath = realpath($path.'/'.$shortname)) { return $this->cache[$name] = $realpath; } return $this->cache[$name] = $path.'/'.$shortname; } } $this->errorCache[$name] = sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths[$namespace])); if (!$throw) { return false; } throw new LoaderError($this->errorCache[$name]); } private function normalizeName($name) { return preg_replace('#/{2,}#', '/', str_replace('\\', '/', $name)); } private function parseName($name, $default = self::MAIN_NAMESPACE) { if (isset($name[0]) && '@' == $name[0]) { if (false === $pos = strpos($name, '/')) { throw new LoaderError(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name)); } $namespace = substr($name, 1, $pos - 1); $shortname = substr($name, $pos + 1); return [$namespace, $shortname]; } return [$default, $name]; } private function validateName($name) { if (false !== strpos($name, "\0")) { throw new LoaderError('A template name cannot contain NUL bytes.'); } $name = ltrim($name, '/'); $parts = explode('/', $name); $level = 0; foreach ($parts as $part) { if ('..' === $part) { --$level; } elseif ('.' !== $part) { ++$level; } if ($level < 0) { throw new LoaderError(sprintf('Looks like you try to load a template outside configured directories (%s).', $name)); } } } private function isAbsolutePath($file) { return strspn($file, '/\\', 0, 1) || (\strlen($file) > 3 && ctype_alpha($file[0]) && ':' === $file[1] && strspn($file, '/\\', 2, 1) ) || null !== parse_url($file, PHP_URL_SCHEME) ; } } class_alias('Twig\Loader\FilesystemLoader', 'Twig_Loader_Filesystem');