1 files changed, 255 insertions, 0 deletions
diff --git a/C++/Menu System/MenuSystem.cpp b/C++/Menu System/MenuSystem.cpp
new file mode 100644
index 0000000..20226a4
--- /dev/null
+++ b/C++/Menu System/MenuSystem.cpp
@@ -0,0 +1,255 @@
+// Name: msglm
+// Date: Oct 21st, 2022
+// Program Name: Menu System 
+// Description: CLI, self-servicing kiosk
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+using namespace std;
+
+//Classes
+
+//I would never, ever make this an object in production
+//the concept of an "Orderable" is pure data read from a file that should be acted upon, but not act.
+class Orderable {
+    private:
+        string name;
+        double price;
+    public:
+        Orderable(double iprice, string iname) {
+            name = iname;
+            price = iprice;
+        }
+
+        string get_name() {return name;}
+        double get_price() {return price;}
+};
+
+
+//Structs
+struct foodOrder {
+    string name;
+    double price;
+    int quantity;
+};
+
+//Implementation of Nim's readline (https://nim-lang.org/docs/io.html#readLine%2CFile) because 
+//I am absolutely sick of having to deal with C++'s obsession with streaming.
+//
+//I swear if I have to reimplement the entire Nim language in C++20 just 
+//to get a compiled language that doesn't increase my chance of stroke 20 fold I will
+
+string readline(ifstream & fileVar) {
+    string temp;
+    getline(fileVar, temp);
+    return temp;
+} 
+
+
+void initalize(string location, ifstream & fileVar) {
+    fileVar.open(location);
+
+    if (!fileVar) {
+        cout << "ERROR! " << location << " failed to open!";
+        exit(1);
+    }
+}
+
+
+//Ideally, the input file should be JSON, YAML, or TOML based 
+//instead of pure plain text for ease of human access
+//but C++ doesn't have JSON parsing library in std for some reason
+vector<Orderable> encodeOrderables(ifstream & fileVar) {
+    string temp;
+    vector<Orderable> orderablesFromFile;
+    while(fileVar.peek() != EOF) {
+        //Here's something absolutely nasty that I discovered while working on this:
+        //when attempting to write the line
+        //orderablesFromFile.push_back(Orderable(readline(fileVar)), stod(readline(fileVar)));
+        //with the object's constructor taking the name then price parameter, I found out that
+        //constructors are executed from right-to-left, not left-to-right and the price would be
+        //read first rather than the name.
+        //
+        //This might be the case for all functions, I did not check.
+        //
+        //There is literally no good reason for this to be the case.
+        orderablesFromFile.push_back(Orderable(stod(readline(fileVar)), readline(fileVar)));
+    }
+    return orderablesFromFile;
+}
+
+//Menu systems
+//Wish we could do some ncurses TUI menus, but alas we're stuck with subpar prompts
+
+int catagoryMenu() {
+    int choice;
+    //No input validation here since the rubric doesn't call for it.
+    cout << "Pick a catagory\n";
+    cout << "1. Drink\n";
+    cout << "2. Appetizer\n";
+    cout << "3. Entree\n";
+    cout << "4. Dessert\n";
+    cout << "5. Finish Order\n";
+    cout << "Enter Selection: ";
+    cin >> choice;
+    return choice;
+}
+
+foodOrder orderingMenu(vector<Orderable> items) {
+    foodOrder completeOrder;
+    int choice;
+    for(int itemPos = 0; itemPos < items.size(); itemPos++) {
+        cout << itemPos << ". " << items[itemPos].get_name() << " - $" << items[itemPos].get_price() << endl;
+    }
+    cout << "Enter Selection: ";
+    cin >> choice;
+    cout << "Enter Amount Desired: ";
+    cin >> completeOrder.quantity;
+
+    completeOrder.name = items[choice].get_name();
+    completeOrder.price = items[choice].get_price();
+
+    //"...you will need to record the item name, price and the quantity desired inside of variables (vector or array) for output later..."
+    //I am modifying this instruction a bit to use a struct instead since structs can hold multiple datatypes and play nice with functions
+    return completeOrder;
+}
+
+//Who can afford to pay this much when tipping? 
+//I can barely afford car insurance!
+double tip() {
+    int choice;
+    //No input validation here since the rubric doesn't call for it.
+    cout << "What percent would you like to tip?\n";
+    cout << "1. 18%\n";
+    cout << "2. 20%.\n";
+    cout << "3. 25%.\n";
+    cout << "4. Custom Amount.\n";
+    cin >> choice;
+    switch(choice) {
+        case 1:
+            return 0.18;
+            break;
+        case 2:
+            return 0.20;
+            break;
+        case 3:
+            return 0.25;
+            break;
+        case 4:
+            double tip;
+            cout << "Enter a tip amount (decimal notation) [ex: 0.18]: ";
+            cin >> tip;
+            //Evil solution to evil users
+            return abs(tip);
+            break;
+        default:
+            cout << "ERROR: Your input was invalid, terminating";
+            exit(1);
+
+    }
+    return choice;
+
+}
+
+double figureTotal(vector<foodOrder> orderList) {
+    double subtotal;
+    for(int orderPos = 0; orderPos < orderList.size(); orderPos++) {
+        subtotal = subtotal + orderList[orderPos].price;
+    }
+    double tax = subtotal*0.1;
+    double total = subtotal+tax;
+
+    //tips
+    cout << "===Amount Currently Due==\n";
+    cout << "Subtotal: $" << subtotal << endl;
+    cout << "Tax: $" << tax << endl;
+    cout << "Total: $" << total << endl;
+    cout << "=========================\n";
+
+
+    total = total + (total*tip());
+    
+    cout << "\033[2J\033[1;1H";
+    
+    cout << "===Amount Currently Due==\n";
+    cout << "Subtotal: $" << subtotal << endl;
+    cout << "Tax: $" << tax << endl;
+    cout << "Total: $" << total << endl;
+
+    return total;
+}
+
+void collectDues(double amountDue) {
+    double paid;
+    while (amountDue > 0) {
+        cout << "Please pay for the amount owed: $" << amountDue << endl;
+        cout << "Enter payment: ";
+        cin >> paid;
+        amountDue = amountDue - paid;
+        paid = 0;
+    }
+}
+
+int main() {
+    //File Vars & Inits
+    ifstream drinkFile;
+    ifstream appetizerFile;
+    ifstream entreeFile;
+    ifstream dessertFile;
+
+    initalize("drink.txt", drinkFile);
+    initalize("appetizer.txt", appetizerFile);
+    initalize("entree.txt", entreeFile);
+    initalize("dessert.txt", dessertFile);
+
+    //Ordering Vars
+    vector<Orderable> possibleDrinks = encodeOrderables(drinkFile);
+    vector<Orderable> possibleAppetizer = encodeOrderables(appetizerFile);
+    vector<Orderable> possibleEntree = encodeOrderables(entreeFile);
+    vector<Orderable> possibleDessert = encodeOrderables(dessertFile);
+    
+    vector<foodOrder> userOrderList;
+    bool ordering = true;
+
+    //"The customer should be able to remain in a category menu until they are ready to return to the main menu"
+    //I assume this means that the customer should be allows to keep ordering until they're satisfied
+    while(ordering) {
+    switch(catagoryMenu()) {
+        case 1:
+            userOrderList.push_back(orderingMenu(possibleDrinks));
+            break;
+        case 2:
+            userOrderList.push_back(orderingMenu(possibleAppetizer));
+            break;
+        case 3:
+            userOrderList.push_back(orderingMenu(possibleEntree));
+            break;
+        case 4:
+            userOrderList.push_back(orderingMenu(possibleDessert));
+            break;
+        case 5:
+            ordering = false;
+            break;
+        default:
+            cout << "ERROR: Your input was invalid, terminating";
+            exit(1);
+    }
+
+    }
+    collectDues(figureTotal(userOrderList));
+    //When the customer is finished ordering, display the subtotal, tax, and total on the screen
+    //Ask for a tip (make a suggested tip amount with 18%, 20%, 25%), then update the total with the tip amount entered
+    //Get payment from the user and display change due to the customer
+    //If the customer does not pay enough money, then the program should continue to ask for money until the total is paid in full
+
+}
+
+/*
+   This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License Version 3 ONLY as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+   */