Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Extension;
Chris@0: 
Chris@0: use Drupal\Component\Serialization\Exception\InvalidDataTypeException;
Chris@0: use Drupal\Core\Serialization\Yaml;
Chris@0: 
Chris@0: /**
Chris@0:  * Parses dynamic .info.yml files that might change during the page request.
Chris@0:  */
Chris@0: class InfoParserDynamic implements InfoParserInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function parse($filename) {
Chris@0:     if (!file_exists($filename)) {
Chris@0:       $parsed_info = [];
Chris@0:     }
Chris@0:     else {
Chris@0:       try {
Chris@0:         $parsed_info = Yaml::decode(file_get_contents($filename));
Chris@0:       }
Chris@0:       catch (InvalidDataTypeException $e) {
Chris@0:         throw new InfoParserException("Unable to parse $filename " . $e->getMessage());
Chris@0:       }
Chris@0:       $missing_keys = array_diff($this->getRequiredKeys(), array_keys($parsed_info));
Chris@0:       if (!empty($missing_keys)) {
Chris@0:         throw new InfoParserException('Missing required keys (' . implode(', ', $missing_keys) . ') in ' . $filename);
Chris@0:       }
Chris@0:       if (isset($parsed_info['version']) && $parsed_info['version'] === 'VERSION') {
Chris@0:         $parsed_info['version'] = \Drupal::VERSION;
Chris@0:       }
Chris@0:     }
Chris@0:     return $parsed_info;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns an array of keys required to exist in .info.yml file.
Chris@0:    *
Chris@0:    * @return array
Chris@0:    *   An array of required keys.
Chris@0:    */
Chris@0:   protected function getRequiredKeys() {
Chris@0:     return ['type', 'core', 'name'];
Chris@0:   }
Chris@0: 
Chris@0: }