90 lines
2.4 KiB
PHP
90 lines
2.4 KiB
PHP
<?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 %}
|
|
*
|
|
* @internal
|
|
*/
|
|
final class IfTokenParser extends AbstractTokenParser
|
|
{
|
|
public function parse(Token $token): Node
|
|
{
|
|
$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): bool
|
|
{
|
|
return $token->test(['elseif', 'else', 'endif']);
|
|
}
|
|
|
|
public function decideIfEnd(Token $token): bool
|
|
{
|
|
return $token->test(['endif']);
|
|
}
|
|
|
|
public function getTag(): string
|
|
{
|
|
return 'if';
|
|
}
|
|
}
|