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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bridge\Twig\NodeVisitor;
use Symfony\Bridge\Twig\Node\TransNode;
/**
* TranslationNodeVisitor extracts translation messages.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class TranslationNodeVisitor implements \Twig_NodeVisitorInterface
{
const UNDEFINED_DOMAIN = '_undefined';
private $enabled = false;
private $messages = array();
public function enable()
{
$this->enabled = true;
$this->messages = array();
}
public function disable()
{
$this->enabled = false;
$this->messages = array();
}
public function getMessages()
{
return $this->messages;
}
/**
* {@inheritdoc}
*/
public function enterNode(\Twig_NodeInterface $node, \Twig_Environment $env)
{
if (!$this->enabled) {
return $node;
}
if (
$node instanceof \Twig_Node_Expression_Filter &&
'trans' === $node->getNode('filter')->getAttribute('value') &&
$node->getNode('node') instanceof \Twig_Node_Expression_Constant
) {
// extract constant nodes with a trans filter
$this->messages[] = array(
$node->getNode('node')->getAttribute('value'),
$this->getReadDomainFromArguments($node->getNode('arguments'), 1),
);
} elseif (
$node instanceof \Twig_Node_Expression_Filter &&
'transchoice' === $node->getNode('filter')->getAttribute('value') &&
$node->getNode('node') instanceof \Twig_Node_Expression_Constant
) {
// extract constant nodes with a trans filter
$this->messages[] = array(
$node->getNode('node')->getAttribute('value'),
$this->getReadDomainFromArguments($node->getNode('arguments'), 2),
);
} elseif ($node instanceof TransNode) {
// extract trans nodes
$this->messages[] = array(
$node->getNode('body')->getAttribute('data'),
$this->getReadDomainFromNode($node->getNode('domain')),
);
}
return $node;
}
/**
* {@inheritdoc}
*/
public function leaveNode(\Twig_NodeInterface $node, \Twig_Environment $env)
{
return $node;
}
/**
* {@inheritdoc}
*/
public function getPriority()
{
return 0;
}
/**
* @param \Twig_Node $arguments
* @param int $index
*
* @return string|null
*/
private function getReadDomainFromArguments(\Twig_Node $arguments, $index)
{
if ($arguments->hasNode('domain')) {
$argument = $arguments->getNode('domain');
} elseif ($arguments->hasNode($index)) {
$argument = $arguments->getNode($index);
} else {
return null;
}
return $this->getReadDomainFromNode($argument);
}
/**
* @param \Twig_Node $node
*
* @return string|null
*/
private function getReadDomainFromNode(\Twig_Node $node = null)
{
if (null === $node) {
return null;
}
if ($node instanceof \Twig_Node_Expression_Constant) {
return $node->getAttribute('value');
}
return self::UNDEFINED_DOMAIN;
}
}