main.cpp

/******************************************************************************
# Author:           Kate Stingle
# Assignment:       Assignment 2 (CS 161B)
# Date:             January 18th, 2025
# Description:      - The goal of this program is to take some user input about a student’s assignment submission
					  and generate a file name for their submission. There will always be a welcome and exit
					  message, and the program uses input validation.

# Input:            In ReadOption(char &option):
					- option as char& reference.
					In ReadInput(char fName[], char lName[], bool &lateFlag):
					- fName and lName as char[] arrays (to be read to)
					- yesNo as char (to be read to, for lateFlag t/f)
					In ReadInput(char parsedID[], char fileName[]):
					- stdID (student ID, last 4 chars copied to parsedID) and fileName as char[] 
					  arrays (to be read to)
					In ReadTime(char strTime[]):
					- hr (0-24) and min (0-60) as ints (to be read to)
					- discard as char (for “:”)
					- strTime as char[] array (not to be read to, but edited)

# Output:           - ERR_INPUT_MSG as const string = “Invalid option! Please try again!!”
					- outputFileName[] as Char array (the produced file name based on user input, passed
					  in and generated by the encode(char encodeFileName[]) function
# Sources:          Assignment 2 Specifications
#******************************************************************************/
#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
#include <iomanip>
#include <string>
#include <cstring>
using namespace std;

// CONSTANTS
const string ERR_INPUT_MSG = "Invalid option! Please try again!!";
const string WELCOME_MSG = "Welcome to my fileName encoding program!!";
const string EXIT_MSG = "Thank you for using my fileName generator!";
const string PRGRM_DESC_MSG = "This program will ask you a few questions and generate an encoded fileName based on your answers.";
const string LNAME_PROMPT_MSG = "Enter your last name: ";
const string FNAME_PROMPT_MSG = "Enter your first name: ";
const string LATE_PROMPT_MSG = "Was your assignment Late (y/n)? ";
const string STUDENTID_PROMPT_MSG = "Enter your Student-ID (format: 222-22-2222): ";
const string FILENAME_PROMPT_MSG = "Enter the file name: ";
const string TIME_PROMPT_MSG = "Enter the time submitted (military time - ex: 18:24 for 6:24pm): ";
const int MIN_IN_HR = 60;
const int HR_IN_DAY = 24;
const int MAXCHAR = 50;

// FUNCTION HEADERS
void welcome();
void displayMenu();
void readOption(char& option);
void readInput(char fName[], char lName[], bool& lateFlag);
void readInput(char parsedID[], char fileName[]);
void readTime(char strTime[]);
void encode(char outputFileName[]);
void cStrToLower(char cStr[]);

// MAIN
int main() {
	char option;
	char outputFileName[MAXCHAR];
	welcome();
	displayMenu();
	readOption(option); // encode a file name or quit
	while (option == 'e') {
		encode(outputFileName); //prompts user for info and constructs name
		cout << "Your encoded file name is: " << outputFileName << endl;
		displayMenu(); //reprompts to continue making file names or quit
		readOption(option);
	}
	cout << EXIT_MSG << endl;
	return 0;
}

// DEFINE FUNCTIONS
void welcome() {
	cout << WELCOME_MSG << endl;
}
void displayMenu(){
	cout << "Please pick an option below : " << endl;
	cout << "(e)Encode a file name" << endl;
	cout << "(q)quit" << endl;
}

void readOption(char& option) {
	cin >> option;
	//input validation:
	while (cin.fail() || !isalpha(option) || (tolower(option) != 'e' && tolower(option) != 'q')) {
		cout << ERR_INPUT_MSG << endl; // error message
		cin.clear();
		cin.ignore(numeric_limits<streamsize>::max(), '\n'); //clear buffer and lower fail flag
		cin >> option; // reinput
	}
}

// prompts user info & generates password to outputFileName[]
void encode(char outputFileName[]){
	char fName[MAXCHAR], lName[MAXCHAR], parsedID[MAXCHAR];
    char inputFileName[MAXCHAR], strTime[MAXCHAR];
	bool lateFlag;
	cout << PRGRM_DESC_MSG << endl; // output program function description
	readInput(fName, lName, lateFlag); // prompt and read for first & last name & ask if late
	readInput(parsedID, inputFileName); // prompt for student id and file name
	readTime(strTime); // prompt for time submitted in military time
	// construct the file name in outputFileName
	strcpy(outputFileName, lName);
	strcat(outputFileName, "_");
	strcat(outputFileName, fName); // FIX THIS more optimal????????????????
	strcat(outputFileName, "_");
	if (lateFlag) { // add LATE if late
		strcat(outputFileName, "LATE_");
	}
	strcat(outputFileName, parsedID);
	strcat(outputFileName, "_");
	strcat(outputFileName, strTime);
	strcat(outputFileName, "_");
	strcat(outputFileName, inputFileName);
}

//collects first, last name and asks if late
void readInput(char fName[], char lName[], bool& lateFlag) {
	char yesNo;
	cout << FNAME_PROMPT_MSG;
	cin >> fName;
	cStrToLower(fName);
	cout << LNAME_PROMPT_MSG;
	cin >> lName;
	cStrToLower(lName);
	cout << LATE_PROMPT_MSG;
	cin >> yesNo;
	yesNo = tolower(yesNo);
	while(yesNo != 'y' && yesNo != 'n'){
		cout << ERR_INPUT_MSG << endl;
		cin.clear();
		cin.ignore(numeric_limits<streamsize>::max(), '\n'); //clear buffer and lower fail flag
		cin >> yesNo;
	}
	if (yesNo == 'y') {
		lateFlag = true;
	} else{
		lateFlag = false;
	}
}

// collect student ID and file name
void readInput(char parsedID[], char fileName[]){
	char stdID[MAXCHAR];
	cout << STUDENTID_PROMPT_MSG;
	cin >> stdID;
	strncpy(parsedID, stdID + 8, 4);
	parsedID[4] = '\0'; // Ensure null termination
	cout << FILENAME_PROMPT_MSG;
	cin >> fileName;
}

//collect submission time
void readTime(char strTime[]) {
	int hr, min;
	char discard;
	cout << TIME_PROMPT_MSG;
	cin >> hr >> discard >> min; //discard holds the ":" between the hours and the mins
	while(cin.fail() || hr < 0 || hr >= 24 || min < 0 || min >= 60 || discard != ':') {
		cout << ERR_INPUT_MSG << endl;
		cin.clear();
		cin.ignore(numeric_limits<streamsize>::max(), '\n'); //clear buffer and lower fail flag
		cout << TIME_PROMPT_MSG;
		cin >> hr >> discard >> min;
	}
	//convert hour from int to string then to cstring and copy to timeStr
	strncpy(strTime, to_string(hr).c_str(), 10);
	//convert min from int to string and then cstring and concatenate to timeStr
	strcat(strTime, to_string(min).c_str());
}

//goes through each character in a char array and changes to lower
void cStrToLower(char cStr[]){
	for (int i = 0; i < strlen(cStr) ; i++) {
		cStr[i] = tolower(cStr[i]);
	}
}