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<?php |
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namespace SilverStripe\Core\Config\Middleware; |
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use Generator; |
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use InvalidArgumentException; |
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use SilverStripe\Config\MergeStrategy\Priority; |
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use SilverStripe\Config\Middleware\Middleware; |
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use SilverStripe\Core\ClassInfo; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\Core\Object; |
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class ExtensionMiddleware implements Middleware |
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{ |
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use MiddlewareCommon; |
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/** |
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* Get config for a class |
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* |
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* @param string $class Name of class |
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* @param int|true $excludeMiddleware Middleware disable flags |
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* @param callable $next Callback to next middleware |
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* @return array Complete class config |
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*/ |
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public function getClassConfig($class, $excludeMiddleware, $next) |
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{ |
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// Get base config |
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$config = $next($class, $excludeMiddleware); |
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if (!$this->enabled($excludeMiddleware)) { |
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return $config; |
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} |
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foreach ($this->getExtraConfig($class, $config) as $extra) { |
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$config = Priority::mergeArray($extra, $config); |
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} |
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return $config; |
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} |
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/** |
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* Applied config to a class from its extensions |
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* |
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* @param string $class |
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* @param array $classConfig |
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* @return Generator |
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*/ |
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protected function getExtraConfig($class, $classConfig) |
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{ |
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if (empty($classConfig['extensions'])) { |
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return; |
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} |
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$extensions = $classConfig['extensions']; |
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foreach ($extensions as $extension) { |
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list($extensionClass, $extensionArgs) = Object::parse_class_spec($extension); |
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if (!class_exists($extensionClass)) { |
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throw new InvalidArgumentException("$class references nonexistent $extensionClass in 'extensions'"); |
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} |
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// Init extension |
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call_user_func(array($extensionClass, 'add_to_class'), $class, $extensionClass, $extensionArgs); |
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// Check class hierarchy from root up |
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foreach (ClassInfo::ancestry($extensionClass) as $extensionClassParent) { |
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// Merge config from extension |
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$extensionConfig = Config::inst()->get($extensionClassParent, null, true); |
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if ($extensionConfig) { |
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yield $extensionConfig; |
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} |
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if (ClassInfo::has_method_from($extensionClassParent, 'get_extra_config', $extensionClassParent)) { |
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$extensionConfig = call_user_func( |
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[ $extensionClassParent, 'get_extra_config' ], |
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$class, |
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$extensionClass, |
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$extensionArgs |
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); |
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if ($extensionConfig) { |
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yield $extensionConfig; |
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} |
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} |
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} |
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} |
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} |
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} |
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silverstripe /
silverstripe-framework
