#pragma once #include "repo.h" #include "Subject.h" class Service : public Subject{ private: Repository& _repository; public: Service(Repository& repository); void add(std::string name, std::string category, int current_price); void bid(std::string name, int bid, int id, std::string date); std::vector get_items(); Item& find_item(std::string name); void attach(Observer* observer) override; void detach(Observer* observer) override; void notify() override; };