SDI/models.cpp at main · ericayau/SDI · GitHub

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#pragma once
#include "models.h"
#include <vector>
#include <string>

class Database {
public:
    static Database& get();
    void load();
    void saveAll() const;

    std::vector<Product>&  products()  { return m_products;  }
    std::vector<Employee>& employees() { return m_employees; }
    std::vector<Order>&    orders()    { return m_orders;    }

    Product*  findProduct(const std::string& id);
    bool addProduct(const Product& p);
    bool updateProduct(const Product& p);
    bool removeProduct(const std::string& id);

    Employee* findEmployee(const std::string& id);
    Employee* findEmployeeByCredentials(const std::string& id, const std::string& pw);
    bool addEmployee(const Employee& e);
    bool updateEmployee(const Employee& e);
    bool removeEmployee(const std::string& id);

    Order* findOrder(const std::string& num);
    bool addOrder(const Order& o);
    bool updateOrder(const Order& o);
    bool removeOrder(const std::string& num);

private:
    Database() = default;
    Database(const Database&) = delete;
    Database& operator=(const Database&) = delete;
    void loadProducts(); void loadEmployees(); void loadOrders();
    void saveProducts() const; void saveEmployees() const; void saveOrders() const;
    std::vector<Product>  m_products;
    std::vector<Employee> m_employees;
    std::vector<Order>    m_orders;
    static const std::string PRODUCT_FILE;
    static const std::string EMPLOYEE_FILE;
    static const std::string ORDER_FILE;
};