interestcalculator/Project2/Menu.cpp

/*
* Cody Cook
* Project 2
* SNHU
* 2023/04/02
*/
#include <string>
#include <iomanip>
#include <iostream>
#include "Interest.h"

// surround text with a character, add buffer when needed
void surroundText(std::string t_text, int t_lineLength, char t_dataInputLine, bool t_bothTopBottom)
{
    if (t_text.length() % 2 == t_lineLength % 2)
    {
        t_text = " " + t_text + " ";
    }
    else
    {
        t_text = " " + t_text + "  ";
    }
    if (t_bothTopBottom)
    {
        std::cout << std::string(t_lineLength, t_dataInputLine) << std::endl;
    }
    std::cout << std::string((t_lineLength - t_text.length()) / 2, t_dataInputLine) << t_text << std::string((t_lineLength - t_text.length()) / 2, t_dataInputLine) << std::endl;
    if (t_bothTopBottom)
    {
        std::cout << std::string(t_lineLength, t_dataInputLine) << std::endl;
    }
}

// add a separator line
void separator(int t_lineLength, char t_dataInputLine, bool t_emptyLine = true)
{
    if (t_emptyLine)
    {
        std::cout << t_dataInputLine << std::string(t_lineLength - 2, ' ') << t_dataInputLine << std::endl;
    }
    else
    {
        std::cout << std::string(t_lineLength, t_dataInputLine) << std::endl;
    }
}

// print details out to screen
void printDetails(unsigned int t_year, double t_yearEndBalance, double t_interestEarned)
{
    std::string tabs = "\t\t\t  $";
    std::cout << t_year << tabs;
    std::cout << std::fixed << std::setprecision(2);
    std::cout << t_yearEndBalance << tabs;
    std::cout << t_interestEarned << std::endl;
}

// print out the bank header
void printHeader() {
    unsigned int lineLength = 35;
    std::string bankName = "Airgead Banking";
    char dataInputLine = '#';
    
    // print out the headers
    surroundText(bankName, lineLength, dataInputLine, true);
    separator(lineLength, dataInputLine, true);   
}

void menu() {
    // set some default variables
    int menuOption = 0;
    double initialInvestment = 0;
    double monthlyDeposit = 0;
    double interestRate = 0;
    int numberOfYears = 0;
    std::string invalidInput = "Invalid input. Please try again:";

    // until the menu is -1, loop through the menu
    while (menuOption != -1)
    {
        unsigned int lineLength = 35;
        const std::string DATA_INPUT = "Data Input";
        char dataInputLine = '#';

        // output the step
        surroundText(DATA_INPUT, lineLength, dataInputLine, false);

        // start collecting user input
        std::cout << "Initial Investment:\t$";
        while (!(std::cin >> initialInvestment))
        {
            std::cout << invalidInput;
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        }
        std::cout << "Monthly Deposit:\t$";
        while (!(std::cin >> monthlyDeposit))
        {
            std::cout << invalidInput;
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        }
        std::cout << "Interest Rate:\t\t%";
        while (!(std::cin >> interestRate))
        {
            std::cout << invalidInput;
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        }
        std::cout << "Number of Years:\t ";
        while (!(std::cin >> numberOfYears))
        {
            std::cout << invalidInput;
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        }

        // setup myInterest
        auto myInterest = Interest(initialInvestment, monthlyDeposit, interestRate, numberOfYears);

        system("pause");
        system("cls");
        
        // show the balances without the monthly payment
        myInterest.calculateBalance(false);

        // show the balances with the monthly payment
        myInterest.calculateBalance(true);
        system("pause");

        // find out what user wants to do now
        std::cout << std::endl << std::endl << "To enter new values, press 1. To exit, press 2: ";
        while (!(std::cin >> menuOption))
        {
            // not a valid option
            std::cout << invalidInput;
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        }
        if (menuOption == 1)
        {
            // clear the screen and start over again
            system("cls");
            printHeader();
        }
        else if (menuOption == 2)
        {
            // exit the program
            menuOption = -1;
        }
        else
        {
            //ask the user to try again with a valid input
            std::cout << "Invalid input. Please try again: ";
        }
    }
}