133 lines
3.3 KiB
PHP
133 lines
3.3 KiB
PHP
<?php
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/*
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* This file is part of Twig.
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*
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* (c) Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Twig\Loader;
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use Twig\Error\LoaderError;
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use Twig\Source;
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/**
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* Loads templates from other loaders.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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final class ChainLoader implements LoaderInterface
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{
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/**
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* @var array<string, bool>
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*/
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private $hasSourceCache = [];
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/**
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* @param iterable<LoaderInterface> $loaders
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*/
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public function __construct(
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private iterable $loaders = [],
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) {
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}
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public function addLoader(LoaderInterface $loader): void
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{
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$current = $this->loaders;
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$this->loaders = (static function () use ($current, $loader): \Generator {
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yield from $current;
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yield $loader;
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})();
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$this->hasSourceCache = [];
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}
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/**
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* @return LoaderInterface[]
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*/
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public function getLoaders(): array
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{
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if (!\is_array($this->loaders)) {
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$this->loaders = iterator_to_array($this->loaders, false);
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}
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return $this->loaders;
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}
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public function getSourceContext(string $name): Source
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{
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$exceptions = [];
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foreach ($this->getLoaders() as $loader) {
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if (!$loader->exists($name)) {
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continue;
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}
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try {
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return $loader->getSourceContext($name);
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} catch (LoaderError $e) {
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$exceptions[] = $e->getMessage();
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}
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}
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throw new LoaderError(\sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
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}
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public function exists(string $name): bool
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{
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if (isset($this->hasSourceCache[$name])) {
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return $this->hasSourceCache[$name];
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}
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foreach ($this->getLoaders() as $loader) {
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if ($loader->exists($name)) {
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return $this->hasSourceCache[$name] = true;
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}
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}
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return $this->hasSourceCache[$name] = false;
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}
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public function getCacheKey(string $name): string
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{
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$exceptions = [];
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foreach ($this->getLoaders() as $loader) {
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if (!$loader->exists($name)) {
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continue;
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}
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try {
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return $loader->getCacheKey($name);
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} catch (LoaderError $e) {
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$exceptions[] = \get_class($loader).': '.$e->getMessage();
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}
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}
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throw new LoaderError(\sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
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}
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public function isFresh(string $name, int $time): bool
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{
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$exceptions = [];
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foreach ($this->getLoaders() as $loader) {
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if (!$loader->exists($name)) {
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continue;
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}
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try {
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return $loader->isFresh($name, $time);
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} catch (LoaderError $e) {
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$exceptions[] = \get_class($loader).': '.$e->getMessage();
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}
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}
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throw new LoaderError(\sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
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}
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}
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