#ifndef INSTALLER_H_
 #define INSTALLER_H_

 #include <string>

 #include <memory>
 #include <functional>

 #include "token.h"
 #include "sys_unistd.h"
 #include "user.h"
 
 
 class installer_ifc {

     public:

         using generator = std::function<std::string()>;
         virtual std::string install_token() const {

             return "123456";
         }
 };

 class installer {
     public:
         using delegate = std::shared_ptr<installer_ifc>;
     private:
         delegate delegate_;
     public:
         installer(const delegate &delegate = std::make_shared<installer_ifc>()) : delegate_(delegate) {}
         std::string install_token() const {
             return delegate_->install_token();
         }
         static installer create(const tokens &tokens, const unistd &unistd,
             const directory &directory, const installer_ifc::generator &generator);
 };
 
 
 
 

 #endif