/**
* Called before child nodes are visited.
*
* @param Twig_Node $node The node to visit
* @param Twig_Environment $env The Twig environment instance
*
* @return Twig_Node The modified node
*/
public function enterNode(Twig_Node $node, Twig_Environment $env)
{
if ($node instanceof Twig_Node_Module) {
$this->inAModule = true;
$this->tags = array();
$this->filters = array();
$this->functions = array();
return $node;
} elseif ($this->inAModule) {
// look for tags
if ($node->getNodeTag() && !isset($this->tags[$node->getNodeTag()])) {
$this->tags[$node->getNodeTag()] = $node;
}
// look for filters
if ($node instanceof Twig_Node_Expression_Filter && !isset($this->filters[$node->getNode('filter')->getAttribute('value')])) {
$this->filters[$node->getNode('filter')->getAttribute('value')] = $node;
}
// look for functions
if ($node instanceof Twig_Node_Expression_Function && !isset($this->functions[$node->getAttribute('name')])) {
$this->functions[$node->getAttribute('name')] = $node;
}
// wrap print to check __toString() calls
if ($node instanceof Twig_Node_Print) {
return new Twig_Node_SandboxedPrint($node->getNode('expr'), $node->getLine(), $node->getNodeTag());
}
}
return $node;
}
public function replace(Node $node, TemplateContext $context)
{
// we only overwrite assetic nodes
if (!$node instanceof AsseticNode) {
return null;
}
// we leave images as they are
$tagName = $node->getNodeTag();
if (!in_array($tagName, array('stylesheets', 'javascripts'), true)) {
return null;
}
// we only handle collection of file assets
$asset = $node->getAttribute('asset');
if (!$asset instanceof AssetCollectionInterface) {
throw new \RuntimeException('Unexpected asset type: ' . get_class($asset));
}
// skip assetic nodes that has some (not-ignored) filters defined
$additionalFilters = array_diff($node->getAttribute('filters'), $this->ignoredFilters);
if (count($additionalFilters) > 0) {
$context->addNotice(sprintf('Skipping %s in %s as filter is used (%s). Remove filter and re-run if you want to migrate this tag', $tagName, $context->getTemplateName(), implode(' ', $additionalFilters)));
return null;
}
$count = $context->getAttribute(self::ATTRIBUTE_NODE_COUNT);
$count = $count !== null ? $count : 0;
$context->setAttribute(self::ATTRIBUTE_NODE_COUNT, $count + 1);
$postfix = $count === 0 ? '' : '-' . $count;
$templateName = $context->getTemplateName();
$assetPath = str_replace('/Resources/views/', '/' . $this->pathInBundle . '/', $templateName);
$assetPath = preg_replace('/(\\.html)?\\.twig$/', '', $assetPath) . $postfix . '.js';
$variables = $asset->getVars();
if (count($variables) === 0) {
$expression = $this->dumpAssets($node, $asset, $tagName, $assetPath);
} else {
$combinations = VarUtils::getCombinations($variables, $this->possibleVariables);
$expression = null;
foreach ($combinations as $combination) {
$combinationAssetPath = substr($assetPath, 0, -2) . implode('.', $combination) . '.js';
if ($expression === null) {
// first combination will be in "else" part (if no other combinations will match)
$expression = $this->dumpAssets($node, $asset, $tagName, $combinationAssetPath, $combination);
} else {
// we recursively build condition like this:
// matchesCombination ? webpack_asset(combinationPath) : [recursion]
$expression = $this->buildCombinationCondition($combination) . "\n" . '? ' . $this->dumpAssets($node, $asset, $tagName, $combinationAssetPath, $combination) . "\n" . ': (' . "\n" . $this->indent($expression) . "\n" . ')';
}
}
}
$body = $node->getNode('body');
// we find and replace "asset_url" to our expression
return $this->replaceAssetUrl($body, $body, $expression);
}
