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<?php |
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namespace Helmut\Forms; |
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class Renderer { |
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/** |
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* Array of engine definitions using |
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* file extension as key. |
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* |
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* @var array |
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*/ |
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protected $engines = [ |
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'.mustache.php' => 'Helmut\Forms\Engines\Mustache', |
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'.twig.php' => 'Helmut\Forms\Engines\Twig', |
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'.blade.php' => 'Helmut\Forms\Engines\Blade', |
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]; |
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/** |
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* Cache of running engines. |
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* |
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* @var array |
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*/ |
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protected $running = []; |
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/** |
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* Cache of template files. |
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* |
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* @var array |
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*/ |
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protected $templates = []; |
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/** |
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* Add a new engine implementation. |
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* |
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* @param string $extension |
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* @param string $class |
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* @return void |
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*/ |
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public function addEngine($extension, $class) |
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{ |
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array_unshift($this->engines, [$extension => $class]); |
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} |
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/** |
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* Get an engine implementation. |
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* |
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* @param string $key |
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* @return \Helmut\Forms\Engine |
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*/ |
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public function start($key) |
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{ |
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if ( ! isset($this->running[$key])) { |
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$this->running[$key] = new $this->engines[$key]; |
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} |
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return $this->running[$key]; |
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} |
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/** |
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* Get engine file extensions. |
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* |
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* @return array |
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*/ |
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public function extensions() |
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{ |
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return array_keys($this->engines); |
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} |
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/** |
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* Create a template cache key. |
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* |
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* @param string $template |
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* @param array $paths |
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* @return string |
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*/ |
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public function key($template, $paths) |
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{ |
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return $template.'-'.md5(serialize($paths)); |
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} |
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/** |
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* Render a template. |
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* |
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* @param string $template |
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* @param array $properties |
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* @param array $paths |
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* @return string |
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*/ |
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public function render($template, $properties, $paths) |
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{ |
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if ($this->has($template, $paths)) { |
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$template = $this->findTemplate($template, $paths); |
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return $this->start($template['engine'])->render($template['path'], $properties); |
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} |
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} |
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/** |
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* Check if a template exists. |
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* |
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* @param string $template |
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* @param array $paths |
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* @return boolean |
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*/ |
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public function has($template, $paths) |
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{ |
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return ! is_null($this->findTemplate($template, $paths)); |
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} |
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/** |
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* Find template file with engine. |
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* |
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* @param string $template |
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* @param array $paths |
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* @return array |
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*/ |
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public function findTemplate($template, $paths) |
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{ |
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$key = $this->key($template, $paths); |
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if ( ! isset($this->templates[$key])) { |
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$this->templates[$key] = null; |
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$extensions = $this->extensions(); |
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foreach ($paths as $path) { |
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foreach ($extensions as $extension) { |
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if (file_exists($path.$template.$extension)) { |
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return $this->templates[$key] = [ |
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'engine' => $extension, |
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'path' => $path.$template.$extension, |
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]; |
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} |
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} |
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} |
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} |
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return $this->templates[$key]; |
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} |
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} |
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helmut /
forms
