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<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
* (c) Armin Ronacher
*
* 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\IfNode;
use Twig\Node\Node;
use Twig\Token;
/**
* Tests a condition.
*
* {% if users %}
* <ul>
* {% for user in users %}
* <li>{{ user.username|e }}</li>
* {% endfor %}
* </ul>
* {% endif %}
*/
final class IfTokenParser extends AbstractTokenParser
{
public function parse(Token $token)
{
$lineno = $token->getLine();
$expr = $this->parser->getExpressionParser()->parseExpression();
$stream = $this->parser->getStream();
$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
$body = $this->parser->subparse([$this, 'decideIfFork']);
$tests = [$expr, $body];
$else = null;
$end = false;
while (!$end) {
switch ($stream->next()->getValue()) {
case 'else':
$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
$else = $this->parser->subparse([$this, 'decideIfEnd']);
break;
case 'elseif':
$expr = $this->parser->getExpressionParser()->parseExpression();
$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
$body = $this->parser->subparse([$this, 'decideIfFork']);
$tests[] = $expr;
$tests[] = $body;
break;
case 'endif':
$end = true;
break;
default:
throw new SyntaxError(sprintf('Unexpected end of template. Twig was looking for the following tags "else", "elseif", or "endif" to close the "if" block started at line %d).', $lineno), $stream->getCurrent()->getLine(), $stream->getSourceContext());
}
}
$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
return new IfNode(new Node($tests), $else, $lineno, $this->getTag());
}
public function decideIfFork(Token $token)
{
return $token->test(['elseif', 'else', 'endif']);
}
public function decideIfEnd(Token $token)
{
return $token->test(['endif']);
}
public function getTag()
{
return 'if';
}
}
class_alias('Twig\TokenParser\IfTokenParser', 'Twig_TokenParser_If');