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<?php |
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declare(strict_types=1); |
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namespace Frostaly\Template; |
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class TemplateEngine |
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{ |
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/** |
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* The namespace used by default. |
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*/ |
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public const DEFAULT_NAMESPACE = '__MAIN_NAMESPACE__'; |
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/** |
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* @var TemplateRenderer[] |
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*/ |
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private array $renderers = []; |
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/** |
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* Create the Engine that renders templates. |
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*/ |
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public function __construct(?TemplateRenderer $defaultRenderer = null) |
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{ |
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if ($defaultRenderer) { |
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$this->renderers[self::DEFAULT_NAMESPACE] = $defaultRenderer; |
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} |
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} |
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/** |
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* Check whether a template exists. |
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* |
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* This method supports the "namespace::template" naming convention |
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* and allows omitting the default filename extension. |
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*/ |
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public function exists(string $name): bool |
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{ |
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[$namespace, $template] = $this->normalizeTemplate($name); |
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return $this->getRenderer($namespace)->exists($template); |
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} |
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/** |
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* Render a template with the given parameters. |
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* |
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* This method supports the "namespace::template" naming convention |
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* and allows omitting the default filename extension. |
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*/ |
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public function render(string $name, array $params = []): string |
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{ |
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[$namespace, $template] = $this->normalizeTemplate($name); |
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return $this->getRenderer($namespace)->render($template, $params); |
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} |
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/** |
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* Get the renderer used by the given namespace. |
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*/ |
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public function getRenderer(string $namespace = self::DEFAULT_NAMESPACE): TemplateRenderer |
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{ |
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if (!isset($this->renderers[$namespace])) { |
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throw new \InvalidArgumentException("Namespace \"$namespace\" does not exist."); |
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} |
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return $this->renderers[$namespace]; |
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} |
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/** |
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* Set the renderer used by the given namespace. |
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*/ |
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public function setRenderer(TemplateRenderer $renderer, string $namespace = self::DEFAULT_NAMESPACE): self |
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{ |
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$this->renderers[$namespace] = $renderer; |
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return $this; |
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} |
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/** |
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* Normalize the template's name. |
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*/ |
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private function normalizeTemplate(string $name): array |
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{ |
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$template = explode('::', $name, 2); |
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if (!isset($template[1])) { |
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array_unshift($template, self::DEFAULT_NAMESPACE); |
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} |
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return $template; |
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} |
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} |
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frostaly /
template
