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<?php |
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namespace TheCodingMachine\CMS\Theme; |
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use Psr\Http\Message\StreamInterface; |
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use TheCodingMachine\CMS\Block\BlockInterface; |
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use TheCodingMachine\CMS\Block\BlockRendererInterface; |
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use TheCodingMachine\CMS\CMSException; |
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use TheCodingMachine\CMS\RenderableInterface; |
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use TheCodingMachine\CMS\Theme\Extensions\ThemeExtension; |
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use Zend\Diactoros\Stream; |
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class TwigTheme implements RenderableInterface |
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{ |
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/** |
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* @var \Twig_Environment |
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*/ |
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private $twig; |
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/** |
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* @var string |
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*/ |
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private $template; |
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/** |
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* @var BlockRendererInterface |
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*/ |
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private $blockRenderer; |
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/** |
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* @var string |
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*/ |
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private $themeUrl; |
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public function __construct(\Twig_Environment $twig, string $template, BlockRendererInterface $blockRenderer, string $themeUrl = null) |
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{ |
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$this->twig = $twig; |
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$this->template = $template; |
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$this->blockRenderer = $blockRenderer; |
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$this->themeUrl = $themeUrl; |
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} |
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/** |
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* Renders (as a stream) the data passed in parameter. |
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* |
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* @param mixed[] $context |
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* @return StreamInterface |
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*/ |
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public function render(array $context): StreamInterface |
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{ |
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$parent = $context['parent'] ?? null; |
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unset($context['parent']); |
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$page = $context['page'] ?? null; |
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unset($context['page']); |
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foreach ($context as $key => &$value) { |
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$value = $this->contextValueToString($value, $context); |
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} |
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if ($parent !== null) { |
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$context['parent'] = $parent; |
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} |
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if ($page !== null) { |
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$context['page'] = $page; |
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} |
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if (!$this->twig->hasExtension(ThemeExtension::class)) { |
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$this->twig->addExtension(new ThemeExtension()); |
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} |
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$themeExtension = $this->twig->getExtension(ThemeExtension::class); |
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/* @var $themeExtension ThemeExtension */ |
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$themeExtension->pushThemeUrl($this->themeUrl); |
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try { |
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$text = $this->twig->render($this->template, $context); |
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} finally { |
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$themeExtension->popThemeUrl(); |
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} |
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$stream = new Stream('php://temp', 'wb+'); |
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$stream->write($text); |
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$stream->rewind(); |
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return $stream; |
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} |
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/** |
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* @param mixed $value |
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* @param mixed[] $context |
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* @return string|array |
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* @throws CMSException |
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*/ |
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private function contextValueToString($value, array $context) |
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{ |
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if ($value instanceof BlockInterface) { |
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$additionalContext = [ |
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'parent' => $context, |
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'page' => $context['page'] ?? $context |
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]; |
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return (string) $this->blockRenderer->renderBlock($value, $additionalContext); |
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} |
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if (is_array($value)) { |
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$value = array_map(function($item) use ($context) { |
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return $this->contextValueToString($item, $context); |
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}, $value); |
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} |
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return $value; |
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} |
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} |
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thecodingmachine /
cms-utils
