74 lines
2.0 KiB
PHP
74 lines
2.0 KiB
PHP
<?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\TokenParser;
|
|
|
|
use Twig\Error\SyntaxError;
|
|
use Twig\Node\EmptyNode;
|
|
use Twig\Node\Node;
|
|
use Twig\Node\Nodes;
|
|
use Twig\Token;
|
|
|
|
/**
|
|
* @internal
|
|
*/
|
|
final class GuardTokenParser extends AbstractTokenParser
|
|
{
|
|
public function parse(Token $token): Node
|
|
{
|
|
$stream = $this->parser->getStream();
|
|
$typeToken = $stream->expect(Token::NAME_TYPE);
|
|
if (!\in_array($typeToken->getValue(), ['function', 'filter', 'test'])) {
|
|
throw new SyntaxError(\sprintf('Supported guard types are function, filter and test, "%s" given.', $typeToken->getValue()), $typeToken->getLine(), $stream->getSourceContext());
|
|
}
|
|
$method = 'get'.$typeToken->getValue();
|
|
|
|
$nameToken = $stream->expect(Token::NAME_TYPE);
|
|
|
|
try {
|
|
$exists = null !== $this->parser->getEnvironment()->$method($nameToken->getValue());
|
|
} catch (SyntaxError) {
|
|
$exists = false;
|
|
}
|
|
|
|
$stream->expect(Token::BLOCK_END_TYPE);
|
|
if ($exists) {
|
|
$body = $this->parser->subparse([$this, 'decideGuardFork']);
|
|
} else {
|
|
$body = new EmptyNode();
|
|
$this->parser->subparseIgnoreUnknownTwigCallables([$this, 'decideGuardFork']);
|
|
}
|
|
$else = new EmptyNode();
|
|
if ('else' === $stream->next()->getValue()) {
|
|
$stream->expect(Token::BLOCK_END_TYPE);
|
|
$else = $this->parser->subparse([$this, 'decideGuardEnd'], true);
|
|
}
|
|
$stream->expect(Token::BLOCK_END_TYPE);
|
|
|
|
return new Nodes([$exists ? $body : $else]);
|
|
}
|
|
|
|
public function decideGuardFork(Token $token): bool
|
|
{
|
|
return $token->test(['else', 'endguard']);
|
|
}
|
|
|
|
public function decideGuardEnd(Token $token): bool
|
|
{
|
|
return $token->test(['endguard']);
|
|
}
|
|
|
|
public function getTag(): string
|
|
{
|
|
return 'guard';
|
|
}
|
|
}
|