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<?php |
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/** |
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* Bright Nucleus View Component. |
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* |
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* @package BrightNucleus\View |
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* @author Alain Schlesser <[email protected]> |
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* @license MIT |
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* @link http://www.brightnucleus.com/ |
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* @copyright 2016 Alain Schlesser, Bright Nucleus |
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*/ |
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namespace BrightNucleus\View\Engine; |
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use BrightNucleus\View\Exception\FailedToLoadView; |
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use BrightNucleus\View\Support\URIHelper; |
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use Exception; |
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/** |
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* Class PHPEngine. |
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* |
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* @since 0.1.0 |
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* |
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* @package BrightNucleus\View\Engine |
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* @author Alain Schlesser <[email protected]> |
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*/ |
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class PHPEngine extends AbstractEngine |
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{ |
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const PHP_EXTENSION = '.php'; |
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/** |
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* Check whether the Findable can handle an individual criterion. |
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* |
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* @since 0.1.0 |
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* |
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* @param mixed $criterion Criterion to check. |
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* |
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* @return bool Whether the Findable can handle the criterion. |
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*/ |
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public function canHandle($criterion) |
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{ |
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return URIHelper::hasExtension($criterion, static::PHP_EXTENSION) |
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&& is_readable($criterion); |
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} |
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/** |
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* Get the rendering callback for a given URI. |
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* |
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* @since 0.1.0 |
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* |
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* @param string $uri URI to render. |
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* @param array $context Context in which to render. |
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* |
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* @return callable Rendering callback. |
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* @throws FailedToLoadView If the View URI is not accessible or readable. |
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* @throws FailedToLoadView If the View URI could not be loaded. |
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*/ |
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public function getRenderCallback($uri, array $context = []) |
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{ |
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if ( ! is_readable($uri)) { |
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throw new FailedToLoadView( |
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sprintf( |
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_('The View URI "%1$s" is not accessible or readable.'), |
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$uri |
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) |
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); |
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} |
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$closure = function () use ($uri, $context) { |
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// Save current buffering level so we can backtrack in case of an error. |
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// This is needed because the view itself might also add an unknown number of output buffering levels. |
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$bufferLevel = ob_get_level(); |
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ob_start(); |
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try { |
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include($uri); |
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} catch (Exception $exception) { |
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// Remove whatever levels were added up until now. |
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while (ob_get_level() > $bufferLevel) { |
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ob_end_clean(); |
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} |
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throw new FailedToLoadView( |
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sprintf( |
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_('Could not load the View URI "%1$s". Reason: "%2$s".'), |
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$uri, |
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$exception->getMessage() |
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), |
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$exception->getCode(), |
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$exception |
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); |
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} |
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return ob_get_clean(); |
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}; |
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return $closure; |
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} |
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} |
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brightnucleus /
view
