<?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;use Twig\Error\Error;use Twig\Error\LoaderError;use Twig\Error\RuntimeError;/** * Default base class for compiled templates. * * This class is an implementation detail of how template compilation currently * works, which might change. It should never be used directly. Use $twig->load() * instead, which returns an instance of \Twig\TemplateWrapper. * * @author Fabien Potencier <fabien@symfony.com> * * @internal */abstract class Template{ const ANY_CALL = 'any'; const ARRAY_CALL = 'array'; const METHOD_CALL = 'method'; protected $parent; protected $parents = []; protected $env; protected $blocks = []; protected $traits = []; protected $extensions = []; protected $sandbox; public function __construct(Environment $env) { $this->env = $env; $this->extensions = $env->getExtensions(); } /** * @internal this method will be removed in 3.0 and is only used internally to provide an upgrade path from 1.x to 2.0 */ public function __toString() { return $this->getTemplateName(); } /** * Returns the template name. * * @return string The template name */ abstract public function getTemplateName(); /** * Returns debug information about the template. * * @return array Debug information */ abstract public function getDebugInfo(); /** * Returns information about the original template source code. * * @return Source */ public function getSourceContext() { return new Source('', $this->getTemplateName()); } /** * Returns the parent template. * * This method is for internal use only and should never be called * directly. * * @param array $context * * @return Template|TemplateWrapper|false The parent template or false if there is no parent */ public function getParent(array $context) { if (null !== $this->parent) { return $this->parent; } try { $parent = $this->doGetParent($context); if (false === $parent) { return false; } if ($parent instanceof self || $parent instanceof TemplateWrapper) { return $this->parents[$parent->getSourceContext()->getName()] = $parent; } if (!isset($this->parents[$parent])) { $this->parents[$parent] = $this->loadTemplate($parent); } } catch (LoaderError $e) { $e->setSourceContext(null); $e->guess(); throw $e; } return $this->parents[$parent]; } protected function doGetParent(array $context) { return false; } public function isTraitable() { return true; } /** * Displays a parent block. * * This method is for internal use only and should never be called * directly. * * @param string $name The block name to display from the parent * @param array $context The context * @param array $blocks The current set of blocks */ public function displayParentBlock($name, array $context, array $blocks = []) { if (isset($this->traits[$name])) { $this->traits[$name][0]->displayBlock($name, $context, $blocks, false); } elseif (false !== $parent = $this->getParent($context)) { $parent->displayBlock($name, $context, $blocks, false); } else { throw new RuntimeError(sprintf('The template has no parent and no traits defining the "%s" block.', $name), -1, $this->getSourceContext()); } } /** * Displays a block. * * This method is for internal use only and should never be called * directly. * * @param string $name The block name to display * @param array $context The context * @param array $blocks The current set of blocks * @param bool $useBlocks Whether to use the current set of blocks */ public function displayBlock($name, array $context, array $blocks = [], $useBlocks = true, self $templateContext = null) { if ($useBlocks && isset($blocks[$name])) { $template = $blocks[$name][0]; $block = $blocks[$name][1]; } elseif (isset($this->blocks[$name])) { $template = $this->blocks[$name][0]; $block = $this->blocks[$name][1]; } else { $template = null; $block = null; } // avoid RCEs when sandbox is enabled if (null !== $template && !$template instanceof self) { throw new \LogicException('A block must be a method on a \Twig\Template instance.'); } if (null !== $template) { try { $template->$block($context, $blocks); } catch (Error $e) { if (!$e->getSourceContext()) { $e->setSourceContext($template->getSourceContext()); } // this is mostly useful for \Twig\Error\LoaderError exceptions // see \Twig\Error\LoaderError if (-1 === $e->getTemplateLine()) { $e->guess(); } throw $e; } catch (\Exception $e) { $e = new RuntimeError(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $template->getSourceContext(), $e); $e->guess(); throw $e; } } elseif (false !== $parent = $this->getParent($context)) { $parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false, $templateContext ?? $this); } elseif (isset($blocks[$name])) { throw new RuntimeError(sprintf('Block "%s" should not call parent() in "%s" as the block does not exist in the parent template "%s".', $name, $blocks[$name][0]->getTemplateName(), $this->getTemplateName()), -1, $blocks[$name][0]->getSourceContext()); } else { throw new RuntimeError(sprintf('Block "%s" on template "%s" does not exist.', $name, $this->getTemplateName()), -1, ($templateContext ?? $this)->getSourceContext()); } } /** * Renders a parent block. * * This method is for internal use only and should never be called * directly. * * @param string $name The block name to render from the parent * @param array $context The context * @param array $blocks The current set of blocks * * @return string The rendered block */ public function renderParentBlock($name, array $context, array $blocks = []) { if ($this->env->isDebug()) { ob_start(); } else { ob_start(function () { return ''; }); } $this->displayParentBlock($name, $context, $blocks); return ob_get_clean(); } /** * Renders a block. * * This method is for internal use only and should never be called * directly. * * @param string $name The block name to render * @param array $context The context * @param array $blocks The current set of blocks * @param bool $useBlocks Whether to use the current set of blocks * * @return string The rendered block */ public function renderBlock($name, array $context, array $blocks = [], $useBlocks = true) { if ($this->env->isDebug()) { ob_start(); } else { ob_start(function () { return ''; }); } $this->displayBlock($name, $context, $blocks, $useBlocks); return ob_get_clean(); } /** * Returns whether a block exists or not in the current context of the template. * * This method checks blocks defined in the current template * or defined in "used" traits or defined in parent templates. * * @param string $name The block name * @param array $context The context * @param array $blocks The current set of blocks * * @return bool true if the block exists, false otherwise */ public function hasBlock($name, array $context, array $blocks = []) { if (isset($blocks[$name])) { return $blocks[$name][0] instanceof self; } if (isset($this->blocks[$name])) { return true; } if (false !== $parent = $this->getParent($context)) { return $parent->hasBlock($name, $context); } return false; } /** * Returns all block names in the current context of the template. * * This method checks blocks defined in the current template * or defined in "used" traits or defined in parent templates. * * @param array $context The context * @param array $blocks The current set of blocks * * @return array An array of block names */ public function getBlockNames(array $context, array $blocks = []) { $names = array_merge(array_keys($blocks), array_keys($this->blocks)); if (false !== $parent = $this->getParent($context)) { $names = array_merge($names, $parent->getBlockNames($context)); } return array_unique($names); } /** * @return Template|TemplateWrapper */ protected function loadTemplate($template, $templateName = null, $line = null, $index = null) { try { if (\is_array($template)) { return $this->env->resolveTemplate($template); } if ($template instanceof self || $template instanceof TemplateWrapper) { return $template; } if ($template === $this->getTemplateName()) { $class = \get_class($this); if (false !== $pos = strrpos($class, '___', -1)) { $class = substr($class, 0, $pos); } return $this->env->loadClass($class, $template, $index); } return $this->env->loadTemplate($template, $index); } catch (Error $e) { if (!$e->getSourceContext()) { $e->setSourceContext($templateName ? new Source('', $templateName) : $this->getSourceContext()); } if ($e->getTemplateLine() > 0) { throw $e; } if (!$line) { $e->guess(); } else { $e->setTemplateLine($line); } throw $e; } } /** * @internal * * @return Template */ protected function unwrap() { return $this; } /** * Returns all blocks. * * This method is for internal use only and should never be called * directly. * * @return array An array of blocks */ public function getBlocks() { return $this->blocks; } public function display(array $context, array $blocks = []) { $this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks)); } public function render(array $context) { $level = ob_get_level(); if ($this->env->isDebug()) { ob_start(); } else { ob_start(function () { return ''; }); } try { $this->display($context); } catch (\Throwable $e) { while (ob_get_level() > $level) { ob_end_clean(); } throw $e; } return ob_get_clean(); } protected function displayWithErrorHandling(array $context, array $blocks = []) { try { $this->doDisplay($context, $blocks); } catch (Error $e) { if (!$e->getSourceContext()) { $e->setSourceContext($this->getSourceContext()); } // this is mostly useful for \Twig\Error\LoaderError exceptions // see \Twig\Error\LoaderError if (-1 === $e->getTemplateLine()) { $e->guess(); } throw $e; } catch (\Exception $e) { $e = new RuntimeError(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getSourceContext(), $e); $e->guess(); throw $e; } } /** * Auto-generated method to display the template with the given context. * * @param array $context An array of parameters to pass to the template * @param array $blocks An array of blocks to pass to the template */ abstract protected function doDisplay(array $context, array $blocks = []);}class_alias('Twig\Template', 'Twig_Template');