CasperSecurity
<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
* (c) Armin Ronacher
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig\Node;
use Twig\Compiler;
use Twig\Node\Expression\AbstractExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Source;
/**
* Represents a module node.
*
* Consider this class as being final. If you need to customize the behavior of
* the generated class, consider adding nodes to the following nodes: display_start,
* display_end, constructor_start, constructor_end, and class_end.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class ModuleNode extends Node
{
public function __construct(Node $body, ?AbstractExpression $parent, Node $blocks, Node $macros, Node $traits, $embeddedTemplates, Source $source)
{
$nodes = [
'body' => $body,
'blocks' => $blocks,
'macros' => $macros,
'traits' => $traits,
'display_start' => new Node(),
'display_end' => new Node(),
'constructor_start' => new Node(),
'constructor_end' => new Node(),
'class_end' => new Node(),
];
if (null !== $parent) {
$nodes['parent'] = $parent;
}
// embedded templates are set as attributes so that they are only visited once by the visitors
parent::__construct($nodes, [
'index' => null,
'embedded_templates' => $embeddedTemplates,
], 1);
// populate the template name of all node children
$this->setSourceContext($source);
}
public function setIndex($index)
{
$this->setAttribute('index', $index);
}
public function compile(Compiler $compiler): void
{
$this->compileTemplate($compiler);
foreach ($this->getAttribute('embedded_templates') as $template) {
$compiler->subcompile($template);
}
}
protected function compileTemplate(Compiler $compiler)
{
if (!$this->getAttribute('index')) {
$compiler->write('<?php');
}
$this->compileClassHeader($compiler);
$this->compileConstructor($compiler);
$this->compileGetParent($compiler);
$this->compileDisplay($compiler);
$compiler->subcompile($this->getNode('blocks'));
$this->compileMacros($compiler);
$this->compileGetTemplateName($compiler);
$this->compileIsTraitable($compiler);
$this->compileDebugInfo($compiler);
$this->compileGetSourceContext($compiler);
$this->compileClassFooter($compiler);
}
protected function compileGetParent(Compiler $compiler)
{
if (!$this->hasNode('parent')) {
return;
}
$parent = $this->getNode('parent');
$compiler
->write("protected function doGetParent(array \$context)\n", "{\n")
->indent()
->addDebugInfo($parent)
->write('return ')
;
if ($parent instanceof ConstantExpression) {
$compiler->subcompile($parent);
} else {
$compiler
->raw('$this->loadTemplate(')
->subcompile($parent)
->raw(', ')
->repr($this->getSourceContext()->getName())
->raw(', ')
->repr($parent->getTemplateLine())
->raw(')')
;
}
$compiler
->raw(";\n")
->outdent()
->write("}\n\n")
;
}
protected function compileClassHeader(Compiler $compiler)
{
$compiler
->write("\n\n")
;
if (!$this->getAttribute('index')) {
$compiler
->write("use Twig\Environment;\n")
->write("use Twig\Error\LoaderError;\n")
->write("use Twig\Error\RuntimeError;\n")
->write("use Twig\Extension\SandboxExtension;\n")
->write("use Twig\Markup;\n")
->write("use Twig\Sandbox\SecurityError;\n")
->write("use Twig\Sandbox\SecurityNotAllowedTagError;\n")
->write("use Twig\Sandbox\SecurityNotAllowedFilterError;\n")
->write("use Twig\Sandbox\SecurityNotAllowedFunctionError;\n")
->write("use Twig\Source;\n")
->write("use Twig\Template;\n\n")
;
}
$compiler
// if the template name contains */, add a blank to avoid a PHP parse error
->write('/* '.str_replace('*/', '* /', $this->getSourceContext()->getName())." */\n")
->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getSourceContext()->getName(), $this->getAttribute('index')))
->raw(" extends Template\n")
->write("{\n")
->indent()
->write("private \$source;\n")
->write("private \$macros = [];\n\n")
;
}
protected function compileConstructor(Compiler $compiler)
{
$compiler
->write("public function __construct(Environment \$env)\n", "{\n")
->indent()
->subcompile($this->getNode('constructor_start'))
->write("parent::__construct(\$env);\n\n")
->write("\$this->source = \$this->getSourceContext();\n\n")
;
// parent
if (!$this->hasNode('parent')) {
$compiler->write("\$this->parent = false;\n\n");
}
$countTraits = \count($this->getNode('traits'));
if ($countTraits) {
// traits
foreach ($this->getNode('traits') as $i => $trait) {
$node = $trait->getNode('template');
$compiler
->addDebugInfo($node)
->write(sprintf('$_trait_%s = $this->loadTemplate(', $i))
->subcompile($node)
->raw(', ')
->repr($node->getTemplateName())
->raw(', ')
->repr($node->getTemplateLine())
->raw(");\n")
->write(sprintf("if (!\$_trait_%s->isTraitable()) {\n", $i))
->indent()
->write("throw new RuntimeError('Template \"'.")
->subcompile($trait->getNode('template'))
->raw(".'\" cannot be used as a trait.', ")
->repr($node->getTemplateLine())
->raw(", \$this->source);\n")
->outdent()
->write("}\n")
->write(sprintf("\$_trait_%s_blocks = \$_trait_%s->getBlocks();\n\n", $i, $i))
;
foreach ($trait->getNode('targets') as $key => $value) {
$compiler
->write(sprintf('if (!isset($_trait_%s_blocks[', $i))
->string($key)
->raw("])) {\n")
->indent()
->write("throw new RuntimeError('Block ")
->string($key)
->raw(' is not defined in trait ')
->subcompile($trait->getNode('template'))
->raw(".', ")
->repr($node->getTemplateLine())
->raw(", \$this->source);\n")
->outdent()
->write("}\n\n")
->write(sprintf('$_trait_%s_blocks[', $i))
->subcompile($value)
->raw(sprintf('] = $_trait_%s_blocks[', $i))
->string($key)
->raw(sprintf(']; unset($_trait_%s_blocks[', $i))
->string($key)
->raw("]);\n\n")
;
}
}
if ($countTraits > 1) {
$compiler
->write("\$this->traits = array_merge(\n")
->indent()
;
for ($i = 0; $i < $countTraits; ++$i) {
$compiler
->write(sprintf('$_trait_%s_blocks'.($i == $countTraits - 1 ? '' : ',')."\n", $i))
;
}
$compiler
->outdent()
->write(");\n\n")
;
} else {
$compiler
->write("\$this->traits = \$_trait_0_blocks;\n\n")
;
}
$compiler
->write("\$this->blocks = array_merge(\n")
->indent()
->write("\$this->traits,\n")
->write("[\n")
;
} else {
$compiler
->write("\$this->blocks = [\n")
;
}
// blocks
$compiler
->indent()
;
foreach ($this->getNode('blocks') as $name => $node) {
$compiler
->write(sprintf("'%s' => [\$this, 'block_%s'],\n", $name, $name))
;
}
if ($countTraits) {
$compiler
->outdent()
->write("]\n")
->outdent()
->write(");\n")
;
} else {
$compiler
->outdent()
->write("];\n")
;
}
$compiler
->subcompile($this->getNode('constructor_end'))
->outdent()
->write("}\n\n")
;
}
protected function compileDisplay(Compiler $compiler)
{
$compiler
->write("protected function doDisplay(array \$context, array \$blocks = [])\n", "{\n")
->indent()
->write("\$macros = \$this->macros;\n")
->subcompile($this->getNode('display_start'))
->subcompile($this->getNode('body'))
;
if ($this->hasNode('parent')) {
$parent = $this->getNode('parent');
$compiler->addDebugInfo($parent);
if ($parent instanceof ConstantExpression) {
$compiler
->write('$this->parent = $this->loadTemplate(')
->subcompile($parent)
->raw(', ')
->repr($this->getSourceContext()->getName())
->raw(', ')
->repr($parent->getTemplateLine())
->raw(");\n")
;
$compiler->write('$this->parent');
} else {
$compiler->write('$this->getParent($context)');
}
$compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
}
$compiler
->subcompile($this->getNode('display_end'))
->outdent()
->write("}\n\n")
;
}
protected function compileClassFooter(Compiler $compiler)
{
$compiler
->subcompile($this->getNode('class_end'))
->outdent()
->write("}\n")
;
}
protected function compileMacros(Compiler $compiler)
{
$compiler->subcompile($this->getNode('macros'));
}
protected function compileGetTemplateName(Compiler $compiler)
{
$compiler
->write("public function getTemplateName()\n", "{\n")
->indent()
->write('return ')
->repr($this->getSourceContext()->getName())
->raw(";\n")
->outdent()
->write("}\n\n")
;
}
protected function compileIsTraitable(Compiler $compiler)
{
// A template can be used as a trait if:
// * it has no parent
// * it has no macros
// * it has no body
//
// Put another way, a template can be used as a trait if it
// only contains blocks and use statements.
$traitable = !$this->hasNode('parent') && 0 === \count($this->getNode('macros'));
if ($traitable) {
if ($this->getNode('body') instanceof BodyNode) {
$nodes = $this->getNode('body')->getNode(0);
} else {
$nodes = $this->getNode('body');
}
if (!\count($nodes)) {
$nodes = new Node([$nodes]);
}
foreach ($nodes as $node) {
if (!\count($node)) {
continue;
}
if ($node instanceof TextNode && ctype_space($node->getAttribute('data'))) {
continue;
}
if ($node instanceof BlockReferenceNode) {
continue;
}
$traitable = false;
break;
}
}
if ($traitable) {
return;
}
$compiler
->write("public function isTraitable()\n", "{\n")
->indent()
->write(sprintf("return %s;\n", $traitable ? 'true' : 'false'))
->outdent()
->write("}\n\n")
;
}
protected function compileDebugInfo(Compiler $compiler)
{
$compiler
->write("public function getDebugInfo()\n", "{\n")
->indent()
->write(sprintf("return %s;\n", str_replace("\n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
->outdent()
->write("}\n\n")
;
}
protected function compileGetSourceContext(Compiler $compiler)
{
$compiler
->write("public function getSourceContext()\n", "{\n")
->indent()
->write('return new Source(')
->string($compiler->getEnvironment()->isDebug() ? $this->getSourceContext()->getCode() : '')
->raw(', ')
->string($this->getSourceContext()->getName())
->raw(', ')
->string($this->getSourceContext()->getPath())
->raw(");\n")
->outdent()
->write("}\n")
;
}
protected function compileLoadTemplate(Compiler $compiler, $node, $var)
{
if ($node instanceof ConstantExpression) {
$compiler
->write(sprintf('%s = $this->loadTemplate(', $var))
->subcompile($node)
->raw(', ')
->repr($node->getTemplateName())
->raw(', ')
->repr($node->getTemplateLine())
->raw(");\n")
;
} else {
throw new \LogicException('Trait templates can only be constant nodes.');
}
}
}