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<?php

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* This file is part of Twig.

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* (c) Fabien Potencier

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* (c) Armin Ronacher

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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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namespace WPML\Core\Twig\TokenParser;

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use WPML\Core\Twig\Error\SyntaxError;

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use WPML\Core\Twig\Node\Expression\AssignNameExpression;

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use WPML\Core\Twig\Node\Expression\ConstantExpression;

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use WPML\Core\Twig\Node\Expression\GetAttrExpression;

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use WPML\Core\Twig\Node\Expression\NameExpression;

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use WPML\Core\Twig\Node\ForNode;

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use WPML\Core\Twig\Token;

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use WPML\Core\Twig\TokenStream;

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/**

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* Loops over each item of a sequence.

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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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* @final

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class ForTokenParser extends \WPML\Core\Twig\TokenParser\AbstractTokenParser

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{

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public function parse(\WPML\Core\Twig\Token $token)

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{

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$lineno = $token->getLine();

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$stream = $this->parser->getStream();

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$targets = $this->parser->getExpressionParser()->parseAssignmentExpression();

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$stream->expect(\WPML\Core\Twig\Token::OPERATOR_TYPE, 'in');

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$seq = $this->parser->getExpressionParser()->parseExpression();

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$ifexpr = null;

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if ($stream->nextIf(\WPML\Core\Twig\Token::NAME_TYPE, 'if')) {

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$ifexpr = $this->parser->getExpressionParser()->parseExpression();

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}

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$stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE);

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$body = $this->parser->subparse([$this, 'decideForFork']);

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if ('else' == $stream->next()->getValue()) {

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$stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE);

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$else = $this->parser->subparse([$this, 'decideForEnd'], \true);

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} else {

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$else = null;

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}

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$stream->expect(\WPML\Core\Twig\Token::BLOCK_END_TYPE);

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if (\count($targets) > 1) {

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$keyTarget = $targets->getNode(0);

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$keyTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($keyTarget->getAttribute('name'), $keyTarget->getTemplateLine());

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$valueTarget = $targets->getNode(1);

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$valueTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine());

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} else {

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$keyTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression('_key', $lineno);

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$valueTarget = $targets->getNode(0);

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$valueTarget = new \WPML\Core\Twig\Node\Expression\AssignNameExpression($valueTarget->getAttribute('name'), $valueTarget->getTemplateLine());

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}

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if ($ifexpr) {

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$this->checkLoopUsageCondition($stream, $ifexpr);

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$this->checkLoopUsageBody($stream, $body);

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}

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return new \WPML\Core\Twig\Node\ForNode($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, $lineno, $this->getTag());

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}

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public function decideForFork(\WPML\Core\Twig\Token $token)

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{

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return $token->test(['else', 'endfor']);

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}

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public function decideForEnd(\WPML\Core\Twig\Token $token)

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{

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return $token->test('endfor');

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}

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// the loop variable cannot be used in the condition

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protected function checkLoopUsageCondition(\WPML\Core\Twig\TokenStream $stream, \WPML\Core\Twig_NodeInterface $node)

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{

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if ($node instanceof \WPML\Core\Twig\Node\Expression\GetAttrExpression && $node->getNode('node') instanceof \WPML\Core\Twig\Node\Expression\NameExpression && 'loop' == $node->getNode('node')->getAttribute('name')) {

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throw new \WPML\Core\Twig\Error\SyntaxError('The "loop" variable cannot be used in a looping condition.', $node->getTemplateLine(), $stream->getSourceContext());

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}

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foreach ($node as $n) {

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if (!$n) {

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continue;

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}

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$this->checkLoopUsageCondition($stream, $n);

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}

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}

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// check usage of non-defined loop-items

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// it does not catch all problems (for instance when a for is included into another or when the variable is used in an include)

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protected function checkLoopUsageBody(\WPML\Core\Twig\TokenStream $stream, \WPML\Core\Twig_NodeInterface $node)

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{

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$attribute = $node->getNode('attribute');

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if ($attribute instanceof \WPML\Core\Twig\Node\Expression\ConstantExpression && \in_array($attribute->getAttribute('value'), ['length', 'revindex0', 'revindex', 'last'])) {

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throw new \WPML\Core\Twig\Error\SyntaxError(\sprintf('The "loop.%s" variable is not defined when looping with a condition.', $attribute->getAttribute('value')), $node->getTemplateLine(), $stream->getSourceContext());

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}

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}

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// should check for parent.loop.XXX usage

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if ($node instanceof \WPML\Core\Twig\Node\ForNode) {

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return;

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}

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foreach ($node as $n) {

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if (!$n) {

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continue;

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}

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$this->checkLoopUsageBody($stream, $n);

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}

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}

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public function getTag()

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{

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return 'for';

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}

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}

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\class_alias('WPML\\Core\\Twig\\TokenParser\\ForTokenParser', 'WPML\\Core\\Twig_TokenParser_For');

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