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<?php |
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/** |
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* This file is part of slick/template package |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Slick\Template\Engine; |
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use Slick\Template\TemplateEngineInterface; |
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use Twig_Environment; |
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use Twig_Extension_Debug; |
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use Twig_Loader_Filesystem; |
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use Twig_TemplateWrapper; |
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/** |
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* Twig |
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* |
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* @package Slick\Template\Engine |
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*/ |
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class Twig implements TemplateEngineInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $optionsMap = [ |
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'debug' => 'debug', |
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'autoEscape' => 'autoescape', |
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'strictVariables' => 'strict_variables', |
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'autoReload' => 'auto_reload', |
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'cache' => 'cache', |
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'baseTemplateClass' => 'base_template_class', |
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'charset' => 'charset', |
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'optimizations' => 'optimizations' |
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]; |
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/** |
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* @var array |
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*/ |
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private $defaultOptions = [ |
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'debug' => false, |
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'autoEscape' => true, |
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'strictVariables' => false, |
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'autoReload' => false, |
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'cache' => false, |
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'baseTemplateClass' => 'Twig_Template', |
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'charset' => 'utf8', |
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'optimizations' => -1 |
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]; |
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/** |
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* @var array |
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*/ |
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private $options = []; |
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/** |
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* @var Twig_Environment |
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*/ |
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private $twigEnvironment; |
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/** |
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* @var array |
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*/ |
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private $locations = []; |
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/** |
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* @var Twig_Loader_Filesystem |
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*/ |
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private $loader; |
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/** |
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* @var Twig_TemplateWrapper |
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*/ |
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private $template; |
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/** |
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* Creates a Twig template engine |
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* |
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* @param array $options |
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* @param Twig_Environment $twigEnvironment |
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*/ |
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public function __construct(array $options = [], Twig_Environment $twigEnvironment = null) |
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{ |
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$this->options = array_merge($this->defaultOptions, $options); |
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$this->twigEnvironment = $twigEnvironment; |
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} |
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/** |
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* Engine configuration options |
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* |
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* @return array |
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*/ |
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public function options() |
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{ |
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return $this->options; |
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} |
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/** |
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* Parses the source template code. |
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* |
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* @param string $source The template to parse |
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* |
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* @return TemplateEngineInterface|self|$this |
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* |
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* @throws \Twig_Error_Loader When the template cannot be found |
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* @throws \Twig_Error_Runtime When a previously generated cache is corrupted |
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* @throws \Twig_Error_Syntax When an error occurred during compilation |
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*/ |
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public function parse($source) |
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{ |
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$this->template = $this->getTwigEnvironment()->load($source); |
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return $this; |
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} |
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/** |
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* Processes the template with data to produce the final output. |
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* |
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* @param mixed $data The data that will be used to process the view. |
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* |
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* @return string Returns processed output string. |
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*/ |
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public function process($data = array()) |
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{ |
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return $this->template->render($data); |
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} |
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/** |
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* Sets the list of available locations for template files. |
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* |
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* @param array $locations |
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* |
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* @return TemplateEngineInterface|self|$this |
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*/ |
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public function setLocations(array $locations) |
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{ |
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$this->locations = $locations; |
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return $this; |
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} |
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/** |
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* Returns the source template engine |
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* |
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* @return object |
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*/ |
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public function getSourceEngine() |
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{ |
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return $this->getTwigEnvironment(); |
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} |
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/** |
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* Creates a twig environment if not injected |
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* |
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* @return Twig_Environment |
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*/ |
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private function getTwigEnvironment() |
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{ |
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if (null == $this->twigEnvironment) { |
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$this->twigEnvironment = $this->createTwigEnvironment(); |
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} |
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return $this->twigEnvironment; |
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} |
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/** |
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* Creates the twig environment |
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* |
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* @return Twig_Environment |
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*/ |
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private function createTwigEnvironment() |
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{ |
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$twigEnv = new Twig_Environment( |
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$this->getLoader(), |
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$this->getOptions() |
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); |
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if ($this->options['debug']) { |
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$twigEnv->addExtension(new Twig_Extension_Debug()); |
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} |
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return $twigEnv; |
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} |
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/** |
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* Creates a file system loader |
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* |
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* @return Twig_Loader_Filesystem |
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*/ |
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private function getLoader() |
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{ |
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if (null == $this->loader) { |
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$this->loader = new Twig_Loader_Filesystem( |
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$this->locations |
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); |
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} |
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return $this->loader; |
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} |
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/** |
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* Returns current configured options |
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* |
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* @return array |
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*/ |
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private function getOptions() |
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{ |
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$options = []; |
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foreach($this->optionsMap as $property => $name) { |
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$options[$name] = $this->options[$property]; |
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} |
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return $options; |
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} |
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} |
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