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<?php |
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namespace Schnittstabil\Curty; |
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use Closure; |
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use Schnittstabil\Get; |
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/** |
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* Curty micro templating renderer. |
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* |
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* @internal |
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*/ |
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class Renderer |
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{ |
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/** |
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* Render template until a fixed point is reached. |
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* |
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* @param string $tpl Curty template |
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* @param object|array $ctx Context (variable lookup table) |
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* |
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* @return string |
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*/ |
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public function __invoke(string $tpl, $ctx) : string |
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{ |
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do { |
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$old = $tpl; |
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$tpl = $this->render($tpl, $ctx); |
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} while ($tpl !== $old); |
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return $tpl; |
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} |
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/** |
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* Render template. |
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* |
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* @param string $tpl Curty template |
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* @param object|array $ctx Context (variable lookup table) |
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* |
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* @return string |
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*/ |
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public function render(string $tpl, $ctx) : string |
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{ |
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if (!preg_match_all('/{{([^{]+?)}}/', $tpl, $matches)) { |
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return $tpl; |
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} |
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foreach ($matches[1] as $key) { |
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try { |
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$replace = $this->getValue($key, $ctx); |
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} catch (\Schnittstabil\Get\OutOfBoundsException $e) { |
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continue; |
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} |
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$tpl = str_replace('{{'.$key.'}}', $this->renderValue($replace), $tpl); |
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} |
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return $tpl; |
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} |
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protected function getValue(string $key, $ctx) |
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{ |
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$value = Get\valueOrFail($key, $ctx); |
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if ($value instanceof Closure) { |
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return $value(); |
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} |
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return $value; |
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} |
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protected function renderValue($value) : string |
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{ |
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if (is_bool($value)) { |
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return var_export($value, true); |
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} |
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if (is_scalar($value) || method_exists($value, '__toString')) { |
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return (string) $value; |
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} |
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return @json_encode($value, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRESERVE_ZERO_FRACTION); |
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} |
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} |
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schnittstabil /
curty
