fastfood.cpp

#include <fstream>
#include <iostream>
#include <string.h>
#include <sstream>
#include <stdlib.h>
#include <string>
#include <unordered_map>

using namespace std;

int get_input();
void display_program_menu();

int POST_NUMBERS = 0; // global number for total posts read by a file in main()

string food_menu[] = {
        "Pizza",
        "Burger",
        "Noodles",
        "Pasta",
        "Sprite",
        "I-Cream",
};

unordered_map<string, float> food_menu_with_prices = {
        {"Pizza", 200.50},
        {"Burger", 150.30},
        {"Noodles", 100.40},
        {"Pasta", 500.00},
        {"Sprite", 120.20},
        {"I-Cream", 180.90},
};
    
class Order
{

    private:

        void display_food_menu()
        {
            for (int food_menu_index = 0; food_menu_index < 6; food_menu_index++)
            {
                cout << "|\t" << food_menu_index + 1 << ". " << food_menu[food_menu_index] << "\t\t\t\t|\n";
            }
            cout << "|\t99. Exit Selection\t\t\t|" << endl;
            cout << "|\t\t\t\t\t\t|" << endl;
        }

        void calculate_total_cost();

    public:

        int id; // all posts having a single unique ID
        string customer_name;
        int number_of_items;
        string address;
        string food_items[100];
        float food_items_cost[100];
        char delivery_or_take_away;
        float total_cost = 0;

        Order()
        {
            POST_NUMBERS++;
            id = POST_NUMBERS;
            number_of_items = 0;
            delivery_or_take_away = 'd';
            address = "";
        }

        ~Order()
        {
            ofstream write_number_of_orders_file("num_orders.txt", ios::out | ios::trunc);
            write_number_of_orders_file << POST_NUMBERS;
            write_number_of_orders_file.close();
        }

        void display_details();
        void enter_details();

};

void display_details(Order order);

int main()
{
    /*
        opens file num_orders.txt to
        read the number of orders
        that exists inside orders.txt
    */
    ifstream number_of_orders_file("num_orders.txt", ios::in);

    // assigns the number to the global variable on line 11
    number_of_orders_file >> POST_NUMBERS;
    // close the file
    number_of_orders_file.close();

    // option for menu by user
    int option;

    // main loop for program starts
    display_program_menu();

    do {
        option = get_input();
        switch (option)
        {
            case 1:
            {
                Order new_order;
                new_order.enter_details();
                new_order.display_details();
                
                ofstream orders("orders", ios::out);
                orders.write((char*)&new_order, sizeof(new_order));
                orders.close();
                break;
            }
            case 2:
            {
                ifstream orders("orders", ios::in);
                Order old_order;
                orders.read((char*)&old_order, sizeof(old_order));
                while (!orders.eof())
                {
                    display_details(old_order);
                    orders.read((char*)&old_order, sizeof(old_order));
                }
                orders.close();
                break;
            }
            default:
                cout << "|\t\t\t\t\t\t|" << endl;
                cout << "|\tERROR! Wrong Input!\t\t\t|" << endl;
                cout << "|\t\t\t\t\t\t|" << endl;
                display_program_menu();
                continue;
        }
        display_program_menu();
    } while(option != 9);

    // Order order;
    // order.enter_details();
    // order.display_details();

    return 0;
}

void Order::enter_details()
{

    string p_customer_name, p_food_items[100], p_address;
    float p_food_items_cost[100];
    char p_delivery_or_take_away;

    cin.ignore();
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tEnter Customer Name : ";
    getline(cin, p_customer_name);
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tEnter Food Items : \t\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    int menu_option;
    string food;
    float cost;
    int order_food_index = 0;

    display_food_menu();

    cout << "|\t> ";
    cin >> menu_option;

    do
    {

        food = food_menu[menu_option-1];
        cost = food_menu_with_prices[food];

        // cout << "Selected : " << food << " with price " << cost << endl;

        p_food_items[order_food_index] = food;
        p_food_items_cost[order_food_index] = cost;

        order_food_index++;
        cout << "|\t> ";
        cin >> menu_option;
    } while (menu_option != 99);

    for (int i=0; i<order_food_index;i++)
    {
        food_items[i] = p_food_items[i];
        food_items_cost[i] = p_food_items_cost[i];
    }

    number_of_items = order_food_index;
    customer_name = p_customer_name;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tDelivery Or Takeaway (d/t) : ";
    cin >> p_delivery_or_take_away;
    
    delivery_or_take_away = (p_delivery_or_take_away=='d' ? 'D':'T');

    if (delivery_or_take_away == 'D')
    {
        cin.ignore();
        cout << "|\tAddress : ";
        getline(cin, p_address);
        address = p_address;
    }

    calculate_total_cost();

}

void Order::display_details()
{
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|~~~~~~~~~~~~~~~ORDER NUMBER 0" << id << "~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tCustomer Name : " << customer_name << "\t\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tFood Items : " << "\t\t\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    string food;
    for (int food_index=0; food_index < number_of_items; food_index++)
    {
        food = food_items[food_index];
        cout << "|\t    ";
        cout << food_index+1 << ". " << food;
        cout << "\t\t" << food_menu_with_prices[food];
        cout << "\t\t|" << endl;
    }
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tTotal Cost\t:\t" << total_cost << "\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tDelivery Type\t:\t" << (delivery_or_take_away=='D' ? "Delivery":"Takeaway") << "\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    if (strlen(address.c_str()) > 0)
    {
        cout << "|\tAddress : \t\t\t\t|\n";
        cout << "|\t\t\t\t\t\t|" << endl;
        cout << "|\t    " << address << endl;
    }
    cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
}

void Order::calculate_total_cost()
{
    for (int item=0; item<number_of_items; item++)
    {
        total_cost += food_items_cost[item];
    }
}

int get_input()
{
    int option;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\t==> ";
    cin >> option;
    if (cin.eof() || option == 99)
    {
        if (option == 99)
            cout << "|\t\t\t\t\t\t|" << endl;
        else
            cout << "99\n|\t\t\t\t\t\t|" << endl;
        cout << "|\tBye\t\t\t\t\t|\n";
        cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|\n" << endl;
        ofstream write_number_of_orders_file("num_orders.txt", ios::out | ios::trunc);
        write_number_of_orders_file << POST_NUMBERS;
        write_number_of_orders_file.close();
        exit(EXIT_SUCCESS);
    }
    return option;
}

void display_program_menu()
{
    cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|" << endl;
    cout << "|\t1. New Order\t\t\t\t|" << endl;
    cout << "|\t2. Get Orders\t\t\t\t|" << endl;
    cout << "|\t3. Search Order\t\t\t\t|" << endl;
    cout << "|\t99. Exit Program\t\t\t|" << endl;
}

void display_details(Order order)
{
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|~~~~~~~~~~~~~~~ORDER NUMBER 0" << order.id << "~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tCustomer Name : " << order.customer_name << "\t\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tFood Items : " << "\t\t\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    string food;
    for (int food_index=0; food_index < order.number_of_items; food_index++)
    {
        food = order.food_items[food_index];
        cout << "|\t    ";
        cout << food_index+1 << ". " << food;
        cout << "\t\t" << food_menu_with_prices[food];
        cout << "\t\t|" << endl;
    }
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tTotal Cost\t:\t" << order.total_cost << "\t\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    cout << "|\tDelivery Type\t:\t" << (order.delivery_or_take_away=='D' ? "Delivery":"Takeaway") << "\t|" << endl;
    cout << "|\t\t\t\t\t\t|" << endl;
    if (strlen(order.address.c_str()) > 0)
    {
        cout << "|\tAddress : \t\t\t\t|\n";
        cout << "|\t\t\t\t\t\t|" << endl;
        cout << "|\t    " << order.address << endl;
    }
    cout << "|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|\n";
    cout << "|\t\t\t\t\t\t|" << endl;
}