original_string: protected function getNewAppId($oldAppId)
      {
          if (empty($oldAppId)) {
              return null;
          }
  
          $apps = $this->package->getResourceFromZip('system/app.json');
          $appName = null;
          foreach ($apps as $app) {
              if ($oldAppId === $app['id']) {
                  $appName = $app['name'];
                  break;
              }
          }
  
          if (!empty($appName)) {
              $newApp = App::whereName($appName)->first(['id']);
              if (!empty($newApp)) {
                  return $newApp->id;
              }
          } else {
              $existingApp = App::find($oldAppId);
              if (!empty($existingApp)) {
                  $appName = $existingApp->name;
  
                  if (in_array($appName, ['admin', 'api_docs', 'file_manager'])) {
                      // If app is one of the pre-defined system apps
                      // then new id is most likely the same as the old id.
                      return $oldAppId;
                  }
              }
          }
  
          return null;
      }
code: protected function getNewAppId($oldAppId)
      {
          if (empty($oldAppId)) {
              return null;
          }
  
          $apps = $this->package->getResourceFromZip('system/app.json');
          $appName = null;
          foreach ($apps as $app) {
              if ($oldAppId === $app['id']) {
                  $appName = $app['name'];
                  break;
              }
          }
  
          if (!empty($appName)) {
              $newApp = App::whereName($appName)->first(['id']);
              if (!empty($newApp)) {
                  return $newApp->id;
              }
          } else {
              $existingApp = App::find($oldAppId);
              if (!empty($existingApp)) {
                  $appName = $existingApp->name;
  
                  if (in_array($appName, ['admin', 'api_docs', 'file_manager'])) {
                      // If app is one of the pre-defined system apps
                      // then new id is most likely the same as the old id.
                      return $oldAppId;
                  }
              }
          }
  
          return null;
      }
code_tokens: protected function getNewAppId ( $ oldAppId ) { if ( empty ( $ oldAppId ) ) { return null ; } $ apps = $ this -> package -> getResourceFromZip ( 'system/app.json' ) ; $ appName = null ; foreach ( $ apps as $ app ) { if ( $ oldAppId === $ app [ 'id' ] ) { $ appName = $ app [ 'name' ] ; break ; } } if ( ! empty ( $ appName ) ) { $ newApp = App :: whereName ( $ appName ) -> first ( [ 'id' ] ) ; if ( ! empty ( $ newApp ) ) { return $ newApp -> id ; } } else { $ existingApp = App :: find ( $ oldAppId ) ; if ( ! empty ( $ existingApp ) ) { $ appName = $ existingApp -> name ; if ( in_array ( $ appName , [ 'admin' , 'api_docs' , 'file_manager' ] ) ) { // If app is one of the pre-defined system apps // then new id is most likely the same as the old id. return $ oldAppId ; } } } return null ; }
docstring: Finds and returns new App id by old App id.
  
  @param $oldAppId
  
  @return int|null
docstring_tokens: Finds and returns new App id by old App id .