public function compile(JsCompiler $compiler, \Twig_NodeInterface $node)
{
if (!$node instanceof \Twig_Node_For) {
throw new \RuntimeException(sprintf('$node must be an instanceof of \\For, but got "%s".', get_class($node)));
}
$count = $this->count++;
$suffix = $count > 0 ? $count : '';
$seqName = 'seq' . $suffix;
$keyName = 'k' . $suffix;
$valueName = 'v' . $suffix;
$iteratedName = 'iterated' . $suffix;
$loopName = 'loop' . $suffix;
if ($count > 0) {
$compiler->enterScope();
}
$compiler->setVar('_seq', $seqName)->setVar('_iterated', $iteratedName)->setVar('loop', $loopName)->addDebugInfo($node);
// keep parent reference as some might rely on this
if (0 === $count) {
$compiler->write("context['_parent'] = context;\n");
}
$compiler->write("var {$seqName} = ")->subcompile($node->getNode('seq'))->raw(";\n");
if (null !== $node->getNode('else')) {
$compiler->write("var {$iteratedName} = false;\n");
}
if ($node->getAttribute('with_loop')) {
$compiler->write("var {$loopName} = {\n")->indent();
if ($count > 0) {
$parentSuffix = $count - 1 > 0 ? $count - 1 : '';
$compiler->write("'parent': {loop: loop{$parentSuffix}},\n");
}
$compiler->write("'index0': 0,\n")->write("'index': 1,\n")->write("'first': true\n")->outdent()->write("};\n");
if (false === $node->getAttribute('ifexpr')) {
$compiler->write("if (twig.countable({$seqName})) {\n")->indent()->write("var length = twig.count({$seqName});\n")->write("{$loopName}['revindex0'] = length - 1;\n")->write("{$loopName}['revindex'] = length;\n")->write("{$loopName}['length'] = length;\n")->write("{$loopName}['last'] = 1 === length;\n")->outdent()->write("}\n");
}
}
$ref = new \ReflectionProperty($node, 'loop');
$ref->setAccessible(true);
$loop = $ref->getValue($node);
$loop->setAttribute('else', null !== $node->getNode('else'));
$loop->setAttribute('with_loop', $node->getAttribute('with_loop'));
$loop->setAttribute('ifexpr', $node->getAttribute('ifexpr'));
$compiler->write("twig.forEach({$seqName}, function({$valueName}, {$keyName}) {\n")->indent()->write('')->subcompile($node->getNode('key_target'))->raw(" = {$keyName};\n")->write('')->subcompile($node->getNode('value_target'))->raw(" = {$valueName};\n")->subcompile($node->getNode('body'))->outdent()->write("}, this);\n");
if (null !== $node->getNode('else')) {
$compiler->write("if (!{$iteratedName}) {\n")->indent()->subcompile($node->getNode('else'))->outdent()->write("}\n");
}
if ($count > 0) {
$compiler->leaveScope();
}
$this->count = $count;
}
