Something similir I have done, here you have (I am passing to repositories) but you can see some commented old code, using remember() to cache. That way I don't have to access database so many times. For example, module can be retrieved from a array, or you can cache it for a long timE ( ->FOREVER() ) and if you updated or insert some new just forget cache for that key. Just ideas. And the code bellow I tell you again, is not definitive, I have a definitive one but I didn't use repositories so I decided to rewrite it.

namespace Nireapp\Permissions;


use Nireapp\Permissions\PermissionInterface;
use \Auth;
use \App;

class PermissionBase implements PermissionInterface {


	private $moduleToCheck;

	private $errors;

	public function __construct($module)
	{
		$this->moduleToCheck = $module ;
		$this->userRepo = App::make('Nireapp\Repositories\Interfaces\UserRepositoryInterface');
		$this->actionRepo = App::make('Nireapp\Repositories\Interfaces\ActionRepositoryInterface');
		$this->moduleRepo = App::make('Nireapp\Repositories\Interfaces\ModuleRepositoryInterface');
		$this->permissionRepo = App::make('Nireapp\Repositories\Interfaces\PermissionRepositoryInterface');
	}


	function can($actionName,$role_id=null)
	{
		if(is_null($role_id)){
			$rol_id = Auth::user()->role_id;
		}

		$moduleTo = $this->$moduleToCheck;
		$action_id = $this->actionRepo->getIdByName($actionName);
		//::where('izena','=',$funtzio)->remember(120)->first()->id;
		$module_id = $this->moduleRepo->getIdByName($moduleTo);

		/*  \Modulu::where('izena','=',$modulua)->where('mota','=','core')->remember(120)->first()->id;
		\Arruntabaimen::where('rol_id','=',$id)->where('funtzio_id','=',$funtzio_id)
		->where('modulu_id','=',$modulu_id)->remember(1)->exists() 
*/

		if( $this->permissionRepo->existsPermission($role_id,$action_id,$module_id) ||  $this->userRepo->isAdmin() )
		{
			return true;
		}else{
			$this->errors = 'ez duzu baimenik "'.$moduleTo.'" moduluan "'.$actionName.'" funtzioa burutzeko';
			return false;
		}

	}


	function getErrors()
	{
		return $this->errors;
	}

	function changeModule($moduleName)
	{
		$this->moduleToCheck = $moduleName;
		return $this;
	}
}