90 lines
2.4 KiB
PHP
90 lines
2.4 KiB
PHP
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<?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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* (c) Armin Ronacher
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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\TokenParser;
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use Twig\Error\SyntaxError;
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use Twig\Node\IfNode;
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use Twig\Node\Node;
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use Twig\Token;
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/**
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* Tests a condition.
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*
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* {% if users %}
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* <ul>
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* {% for user in users %}
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* <li>{{ user.username|e }}</li>
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* {% endfor %}
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* </ul>
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* {% endif %}
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*
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* @internal
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*/
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final class IfTokenParser extends AbstractTokenParser
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{
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public function parse(Token $token): Node
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{
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$lineno = $token->getLine();
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$expr = $this->parser->getExpressionParser()->parseExpression();
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$stream = $this->parser->getStream();
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$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
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$body = $this->parser->subparse([$this, 'decideIfFork']);
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$tests = [$expr, $body];
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$else = null;
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$end = false;
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while (!$end) {
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switch ($stream->next()->getValue()) {
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case 'else':
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$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
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$else = $this->parser->subparse([$this, 'decideIfEnd']);
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break;
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case 'elseif':
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$expr = $this->parser->getExpressionParser()->parseExpression();
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$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
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$body = $this->parser->subparse([$this, 'decideIfFork']);
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$tests[] = $expr;
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$tests[] = $body;
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break;
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case 'endif':
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$end = true;
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break;
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default:
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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(), $stream->getSourceContext());
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}
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}
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$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
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return new IfNode(new Node($tests), $else, $lineno, $this->getTag());
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}
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public function decideIfFork(Token $token): bool
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{
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return $token->test(['elseif', 'else', 'endif']);
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}
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public function decideIfEnd(Token $token): bool
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{
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return $token->test(['endif']);
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}
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public function getTag(): string
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{
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return 'if';
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}
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}
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