Viewing file:  FilesystemLoader.php (7.63 KB) -rw-r--r--
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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 <[email protected]>
*/
class FilesystemLoader implements LoaderInterface
{
/** Identifier of the main namespace. */
public 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 (null !== $rootPath && false !== ($realPath = realpath($rootPath))) {
$this->rootPath = $realPath.\DIRECTORY_SEPARATOR;
}
if ($paths) {
$this->setPaths($paths);
}
}
/**
* Returns the paths to the templates.
*/
public function getPaths(string $namespace = self::MAIN_NAMESPACE): array
{
return $this->paths[$namespace] ?? [];
}
/**
* Returns the path namespaces.
*
* The main namespace is always defined.
*/
public function getNamespaces(): array
{
return array_keys($this->paths);
}
/**
* @param string|array $paths A path or an array of paths where to look for templates
*/
public function setPaths($paths, string $namespace = self::MAIN_NAMESPACE): void
{
if (!\is_array($paths)) {
$paths = [$paths];
}
$this->paths[$namespace] = [];
foreach ($paths as $path) {
$this->addPath($path, $namespace);
}
}
/**
* @throws LoaderError
*/
public function addPath(string $path, string $namespace = self::MAIN_NAMESPACE): void
{
// 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, '/\\');
}
/**
* @throws LoaderError
*/
public function prependPath(string $path, string $namespace = self::MAIN_NAMESPACE): void
{
// 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(string $name): Source
{
if (null === $path = $this->findTemplate($name)) {
return new Source('', $name, '');
}
return new Source(file_get_contents($path), $name, $path);
}
public function getCacheKey(string $name): string
{
if (null === $path = $this->findTemplate($name)) {
return '';
}
$len = \strlen($this->rootPath);
if (0 === strncmp($this->rootPath, $path, $len)) {
return substr($path, $len);
}
return $path;
}
/**
* @return bool
*/
public function exists(string $name)
{
$name = $this->normalizeName($name);
if (isset($this->cache[$name])) {
return true;
}
return null !== $this->findTemplate($name, false);
}
public function isFresh(string $name, int $time): bool
{
// false support to be removed in 3.0
if (null === $path = $this->findTemplate($name)) {
return false;
}
return filemtime($path) < $time;
}
/**
* @return string|null
*/
protected function findTemplate(string $name, bool $throw = true)
{
$name = $this->normalizeName($name);
if (isset($this->cache[$name])) {
return $this->cache[$name];
}
if (isset($this->errorCache[$name])) {
if (!$throw) {
return null;
}
throw new LoaderError($this->errorCache[$name]);
}
try {
$this->validateName($name);
list($namespace, $shortname) = $this->parseName($name);
} catch (LoaderError $e) {
if (!$throw) {
return null;
}
throw $e;
}
if (!isset($this->paths[$namespace])) {
$this->errorCache[$name] = sprintf('There are no registered paths for namespace "%s".', $namespace);
if (!$throw) {
return null;
}
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 (!$throw) {
return null;
}
throw new LoaderError($this->errorCache[$name]);
}
private function normalizeName(string $name): string
{
return preg_replace('#/{2,}#', '/', str_replace('\\', '/', $name));
}
private function parseName(string $name, string $default = self::MAIN_NAMESPACE): array
{
if (isset($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(string $name): void
{
if (false !== strpos($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(string $file): bool
{
return strspn($file, '/\\', 0, 1)
|| (\strlen($file) > 3 && ctype_alpha($file[0])
&& ':' === $file[1]
&& strspn($file, '/\\', 2, 1)
)
|| null !== parse_url($file, \PHP_URL_SCHEME)
;
}
}
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