main.cpp

#include <iostream>
#include <conio.h> //for cin.get() function
#include <stdlib.h> //for system("cls") and exit(0) function
#include <fstream> //for file handling
#include <string> // for manipulating strings
#include <sstream> //for to_string function
#include <cstdlib> //for stoi function
#include <ctime> //for time_t, tm, localtime_s, mktime
using namespace std;

void start();  //function for intro page
void MainMenu(); //function for main menu
void adminMenu();//function for admin menu	
void membershipMenu(); //function for membership menu	
void adminPassCheck(); //Function to require a password to access admin menu
class book {
	string bookName;
	string authorName;
	string bookID;
	string quantity;
	fstream file;

public:
	void createBook()
	{
		system("cls");
		cout << "\n\n\t\t\t\t\t\t\"NEW BOOK ENTRY\"";
		cout << "\n\n\tEnter the name of the book : ";
		cin.ignore();
		getline(cin, bookName);
		cout << "\n\n\tEnter the name of the author : ";
		getline(cin, authorName);
		cout << "\n\n\tEnter the book ID : ";
		getline(cin, bookID);
		cout << "\n\n\tEnter the quantity of the book : ";
		getline(cin, quantity);
		file.open("bookRecords.txt", ios::out | ios::app);
		file << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
		file.close();
		cout << "\n\n\tBook Created...!";
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.get();
		adminMenu();
	}
	void showBook() //all books
	{
		system("cls");
		file.open("bookRecords.txt", ios::in);
		if (!file)
		{
			cout << "No records found!";
			cout << "\n\n\tPress Enter to go back to admin menu";
			cin.ignore();
			cin.get();
			adminMenu();
			return;
		}
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			cout << "----------------------------------------------";
			cout << "\n\n\tBook Name : " << bookName;
			cout << "\n\n\tAuthor Name : " << authorName;
			cout << "\n\n\tBook ID : " << bookID;
			cout << "\n\n\tQuantity : " << quantity;
			cout << "\n\n----------------------------------------------";
		}
		file.close();
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.ignore();
		cin.get();
		adminMenu();
		return;
	}
	void modifyBook()
	{
		system("cls");
		fstream tempFile; //object of fstream
		file.open("bookRecords.txt", ios::in);
		tempFile.open("temp.txt", ios::out);
		bool found = false;
		cin.ignore();
		cout << "\n\tEnter the id of book you want to modify : ";
		string id;
		getline(cin, id);
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			if (bookID == id) {
				found = true;
				cout << "\n\n\tEnter the new name of the book : ";
				getline(cin, bookName);
				cout << "\n\n\tEnter the new name of the author : ";
				getline(cin, authorName);
				cout << "\n\n\tEnter the new quantity of the book : ";
				getline(cin, quantity);
				tempFile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
				cout << "\n\n\tBook Modified...!";
			}
			else
			{
				tempFile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
			}

		}
		file.close();
		tempFile.close();
		remove("bookRecords.txt");
		rename("temp.txt", "bookRecords.txt");
		if (!found) {
			cout << "\n\n\tBook with this id does not exist in our library";
		}
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.get();
		adminMenu();
	}
	void deleteBook()
	{
		system("cls");
		cout << "\n\tEnter the id of the book you want to delete: ";
		string id;
		cin.ignore();
		getline(cin, id);
		fstream tempFile;
		file.open("bookRecords.txt", ios::in);
		tempFile.open("temp.txt", ios::out);
		bool found = false;
		while (getline(file, bookID, '*')) {
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			if (bookID == id) {
				found = true;
				cout << "\n\n\tBook with ID " << id << " has been deleted.";
			}
			else {
				tempFile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
			}
		}
		file.close();
		tempFile.close();
		remove("bookRecords.txt");
		rename("temp.txt", "bookRecords.txt");
		if (!found) {
			cout << "\n\nBook with this ID does not exist in our library.";
		}
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.get();
		adminMenu();
	}
	void searchBook()
	{
		system("cls");
		cout << "\n\tEnter the id of the book you want to search: ";
		string id;
		cin.ignore();
		getline(cin, id);
		file.open("bookRecords.txt", ios::in);
		bool found = false;
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			if (bookID == id)
			{
				cout << "\tBook id : " << bookID;
				cout << "\n\tBook name : " << bookName;
				cout << "\n\tBook Author : " << authorName;
				cout << "\n\tBook Quantity : " << quantity;
				found = true;
			}
		}
		if (!found)
		{
			cout << "\tThis book does not exist in our library";
		}
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.get();
		adminMenu();
	}
	void issueBook()
	{
		system("CLS");
		file.open("bookRecords.txt", ios::in);
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			cout << "----------------------------------------------";
			cout << "\n\n\tBook Name : " << bookName;
			cout << "\n\n\tAuthor Name : " << authorName;
			cout << "\n\n\tBook ID : " << bookID;
			cout << "\n\n\tQuantity : " << quantity;
			cout << "\n\n----------------------------------------------";
		}
		file.close();

		fstream tempfile;
		fstream duedate;
		file.open("bookRecords.txt", ios::in);
		tempfile.open("temp.txt", ios::out);
		duedate.open("dueDates.txt", ios::out | ios::app);
		string id;
		int newQuantity;
		cout << "\n\n\tEnter the ID of book you want to borrow : ";
		getline(cin, id);
		bool found = false;
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			if (bookID == id)
			{
				newQuantity = stoi(quantity); //built in function present in <cstdlib>
				if (newQuantity <= 0)
				{
					cout << "\n\n\tThis book is currently unavailable";
					tempfile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
					found = true;
				}
				else
				{
					cout << "\n\n\tBook Issued";
					newQuantity--;
					quantity = to_string(newQuantity); //built in function present in <sstream>
					tempfile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;

					// Add due date
					time_t now = time(0);
					tm ltm;
					localtime_s(&ltm, &now);
					ltm.tm_mday += 14; // 2 weeks due date
					mktime(&ltm);
					duedate << bookID << "*" << 1900 + ltm.tm_year << "-" << 1 + ltm.tm_mon << "-" << ltm.tm_mday << endl;
					found = true;
				}

			}
			else
			{
				tempfile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
			}
		}
		file.close();
		tempfile.close();
		duedate.close();
		if (!found)
		{
			cout << "\n\n\tThere is no book with id : " << id;
		}
		remove("bookRecords.txt");
		rename("temp.txt", "bookRecords.txt");

		cout << "\n\n\tPress Enter to go back to main menu ";
		cin.get();
		MainMenu();
	}
	void returnBook()
	{
		system("CLS");
		file.open("bookRecords.txt", ios::in);
		fstream tempfile;
		tempfile.open("temp.txt", ios::out);
		string id;
		int newQuantity;
		cin.ignore();
		cout << "\n\n\tEnter the ID of book you want to return : ";
		getline(cin, id);
		bool found = false;
		while (getline(file, bookID, '*'))
		{
			getline(file, bookName, '*');
			getline(file, authorName, '*');
			getline(file, quantity, '\n');
			if (bookID == id)
			{
				cout << "\n\n\tBook Collected and made available for next use.";
				newQuantity = stoi(quantity);
				newQuantity++;
				quantity = to_string(newQuantity);
				tempfile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;

				found = true;
			}
			else
			{
				tempfile << bookID << "*" << bookName << "*" << authorName << "*" << quantity << endl;
			}
		}
		file.close();
		tempfile.close();
		remove("bookRecords.txt");
		rename("temp.txt", "bookRecords.txt");
		if (!found)
		{
			cout << "\n\n\tThis book is not borrowed from our library ";
		}
		cout << "\n\n\tPress Enter to go back to main menu ";
		cin.get();
		MainMenu();
	}
	void checkOverdueBooks()
	{
		system("CLS");
		fstream duedate;
		duedate.open("dueDates.txt", ios::in);
		if (!duedate)
		{
			cout << "\n\n\tNo records found!";
			cout << "\n\n\tPress Enter to go back to admin menu";
			cin.ignore();
			cin.get();
			adminMenu();
			return;
		}

		string bookID, dueDate;
		bool found = false;
		time_t now = time(0);
		tm ltm;
		localtime_s(&ltm, &now);
		string currentDate = to_string(1900 + ltm.tm_year) + "-" + to_string(1 + ltm.tm_mon) + "-" + to_string(ltm.tm_mday);
		while (getline(duedate, bookID, '*'))
		{
			getline(duedate, dueDate, '\n');
			if (dueDate < currentDate)
			{
				cout << "----------------------------------------------";
				cout << "\n\n\tBook ID : " << bookID;
				cout << "\n\n\tDue Date : " << dueDate;
				cout << "\n\n\tStatus : Overdue";
				cout << "\n\n----------------------------------------------";
				found = true;
			}
		}
		duedate.close();
		if (!found)
		{
			cout << "\n\n\tNo overdue books found.";
		}
		cout << "\n\n\tPress Enter to go back to admin menu";
		cin.ignore();
		cin.get();
		adminMenu();
	}

}obj;

class member
{
	string memberID;
	string memberName;
	string memberPassword;
	fstream file;
public:
	void createMember()
	{
		system("cls");
		cout << "\n\n\t\t\t\t\t\t\"NEW MEMBER ENTRY\"";
		cout << "\n\n\tEnter the name of member : ";
		cin.ignore();
		getline(cin, memberName);
		cout << "\n\n\tEnter the member's ID: ";
		getline(cin, memberID);
		cout << "\n\n\tSet password for member : ";
		getline(cin, memberPassword);
		file.open("memberRecords.txt", ios::out | ios::app);
		file << memberID << "*" << memberName << "*" << memberPassword << endl;
		file.close();
		cout << "\n\n\tMember Created...!";
		cout << "\n\n\tPress enter to go back to membership menu";
		cin.get();
		membershipMenu();

	}
	void removeMember()
	{
		system("cls");
		string id;
		cin.ignore();
		cout << "\n\tEnter the id of member you want to remove : ";
		getline(cin, id);
		fstream tempFile;
		file.open("memberRecords.txt", ios::in);
		tempFile.open("temp.txt", ios::out);
		bool found = false;
		while (getline(file, memberID, '*'))
		{
			getline(file, memberName, '*');
			getline(file, memberPassword, '\n');
			if (id == memberID)
			{
				cout << "\n\n\tMember with ID " << id << " Deleted...";
				found = true;
			}
			else
			{
				tempFile << memberID << "*" << memberName << "*" << memberPassword << endl;
			}
		}
		file.close();
		tempFile.close();
		remove("memberRecords.txt");
		rename("temp.txt", "memberRecords.txt");
		if (!found)
		{
			cout << "\n\n\tThere is no member with ID " << id;
		}
		cout << "\n\n\tPress enter to go back to membership menu";
		cin.get();
		membershipMenu();
	}
	void showMembers()
	{
		system("cls");
		file.open("memberRecords.txt", ios::in);
		cin.ignore();
		while (getline(file, memberID, '*'))
		{
			getline(file, memberName, '*');
			getline(file, memberPassword, '\n');
			cout << "----------------------------------------------";
			cout << "\n\n\tMember Name : " << memberName;
			cout << "\n\n\tMember ID : " << memberID;
			cout << "\n\n----------------------------------------------";
		}
		file.close();
		cout << "\n\n\tPress Enter to go back to membership menu";
		cin.get();
		membershipMenu();

	}
	void searchMember()
	{
		system("CLS");
		string id;
		cin.ignore();
		cout << "\n\tEnter the id of member : ";
		getline(cin, id);
		file.open("memberRecords.txt", ios::in);
		bool found = false;
		while (getline(file, memberID, '*'))
		{
			getline(file, memberName, '*');
			getline(file, memberPassword, '\n');
			if (memberID == id)
			{
				cout << "----------------------------------------------";
				cout << "\n\n\tMember Name : " << memberName;
				cout << "\n\n\tMember ID : " << memberID;
				cout << "\n\n----------------------------------------------";
				found = true;
			}
		}
		file.close();
		if (!found)
		{
			cout << "\tThe member with ID " << id << " cannot be found";
		}
		cout << "\n\n\tPress enter to continue";
		cin.get();
		membershipMenu();

	}
	void modifyMember()
	{
		system("cls");
		string id;
		cin.ignore();
		cout << "\n\tEnter the id of member : ";
		getline(cin, id);
		fstream tempfile;
		bool found = false;
		tempfile.open("temp.txt", ios::out);
		file.open("memberRecords.txt", ios::in);
		while (getline(file, memberID, '*'))
		{
			getline(file, memberName, '*');
			getline(file, memberPassword, '\n');
			if (memberID == id)
			{
				cout << "\n\n\tEnter the new name of the member : ";
				getline(cin, memberName);
				cout << "\n\n\tEnter the new Password for the member : ";
				getline(cin, memberPassword);
				found = true;
				tempfile << memberID << "*" << memberName << "*" << memberPassword << endl;
			}
			else
			{
				tempfile << memberID << "*" << memberName << "*" << memberPassword << endl;
			}
		}
		file.close();
		tempfile.close();
		remove("memberRecords.txt");
		rename("temp.txt", "memberRecords.txt");
		if (!found)
		{
			cout << "\n\n\tThere is no member with id " << id;
		}
		cout << "\n\n\tPress enter to go back to membership menu";
		cin.get();
		membershipMenu();
	}
	void memberPassCheck()
	{
		system("CLS");
		string id;
		string pass;
		int tries = 0;
		file.open("memberRecords.txt", ios::in);
		cin.ignore();
		cout << "\n\n\tEnter Your ID : ";
		getline(cin, id);

		bool idFound = false;
		string foundName, foundPassword;
		while (getline(file, memberID, '*'))
		{
			getline(file, memberName, '*');
			getline(file, memberPassword, '\n');
			if (id == memberID)
			{
				idFound = true;
				foundName = memberName;
				foundPassword = memberPassword;
				break;
			}
		}
		file.close();

		if (!idFound)
		{
			cout << "\n\n\tThere is no member with this ID, Contact administration to get yourself registered.";
			cout << "\n\n\tPress enter to go back to main menu";
			cin.get();
			MainMenu();
			return;
		}

		while (tries < 3)
		{
			cout << "\n\n\tEnter Your Password : ";
			getline(cin, pass);
			if (pass == foundPassword)
			{
				cout << "\n\n\tWelcome back..... " << foundName;
				cout << "\n\n\tPress enter to continue";
				cin.get();
				obj.issueBook();
				return;
			}
			else
			{
				tries++;
				cout << "\n\n\tInvalid Password " << 3 - tries << " Tries left";
			}
		}

		cout << "\n\n\tToo many failed attempts press enter to go back to main menu";
		cin.get();
		MainMenu();
	}
}abc;

int main()
{
	start();
	MainMenu();

}
void start()
{
	cout << "\n\n\n\n\n\n\n\n\n\t\t\t\t\t\t\tLibrary";
	cout << "\n\n\n\t\t\t\t\t\t\tManagement";
	cout << "\n\n\n\t\t\t\t\t\t\tSystem\n\n\n";
	cout << "\n\nPress Enter key to continue";
	cin.get();        //To pause the program until enter is pressed


}
void MainMenu()
{
	system("cls");  //Function to clear screen 
	int choice;
	do
	{
		cout << "\n\n\tPress 1 to issue a book : ";
		cout << "\n\n\tPress 2 to return a book : ";
		cout << "\n\n\tPress 3 for admistrator menu : ";
		cout << "\n\n\tPress 4 to quit the program : ";
		cout << "\n\n\tEnter Your Choice : (1-4) : ";
		cin >> choice;  //stores the value given by user 
		if (choice == 1)
		{
			abc.memberPassCheck();
		}
		else if (choice == 2)
		{
			obj.returnBook();
		}
		else if (choice == 3)
		{
			adminPassCheck();
		}
		else if (choice == 4)
		{
			cout << "\n\n\tBye..!";
			exit(0);
		}
		else
		{
			cin.clear();
			cin.ignore(1000, '\n');
			cout << "\n\n\tInvalid Choice,Try again.";
		}
	} while (choice != 4);  //loop for multiple iterations.
}
void adminPassCheck()
{
	system("CLS");
	string adminPass = "adminadmin";
	string pass;
	int tries = 0;
	cin.ignore();
abc: //label
	if (tries < 3)
	{
		cout << "\n\tEnter The password for admin menu : ";
		getline(cin, pass);
		if (pass == adminPass)
		{
			cout << "\n\n\tAccess Granted ";
			cout << "\n\n\tPress Enter to continue to admin menu ";
			cin.get();
			adminMenu();
		}
		else
		{
			tries++;
			cout << "\n\n\tInvalid Password, " << 3 - tries << " Tries left";
			goto abc;
		}
	}
	else
	{
		cout << "\n\n\tToo many invalid attempts Quitting the system, Try again later" << endl << endl << endl;
		exit(0);
	}
}
void adminMenu()
{
	system("cls");
	int choice2;

	cout << "\n\n\t\t\t\t\t\t\"ADMINISTRATOR MENU\"";
x:
	cout << "\n\n\t1.Add a new book";
	cout << "\n\n\t2.Remove an existing book";
	cout << "\n\n\t3.Display all books";
	cout << "\n\n\t4.Search for a specific book";
	cout << "\n\n\t5.Modify a book";
	cout << "\n\n\t6.Membership Control menu";
	cout << "\n\n\t7.Check overdue books";
	cout << "\n\n\t8.Back to main menu";
	cout << "\n\n\tEnter your choice (1-8) : ";
	cin >> choice2;
	switch (choice2)
	{
	case 1:
		obj.createBook();
		break;
	case 2:
		obj.deleteBook();
		break;
	case 3:
		cout << "\n\n\t\t\t\t\t\t\"BOOK DETAILS\"";
		obj.showBook();
		break;
	case 4:
		obj.searchBook();
		break;
	case 5:
		obj.modifyBook();
		break;
	case 6:
		membershipMenu();
		break;
	case 7:
		obj.checkOverdueBooks();
		break;
	case 8:
		MainMenu();
		break;
	default:
		cin.clear();
		cin.ignore(1000, '\n');
		cout << "\n\n\tInvalid Choice,Try again.";
		goto x;
		break;
	}
}
void membershipMenu()
{
	system("cls");
	int choice3;

	cout << "\n\n\t\t\t\t\t\t\"MEMBERSHIP MENU\"";
x:
	cout << "\n\n\t1.Add a new member";
	cout << "\n\n\t2.Remove an existing member";
	cout << "\n\n\t3.Display all members";
	cout << "\n\n\t4.Search for a specific member";
	cout << "\n\n\t5.Modify a member";  //overdue banana ha bhai baad me :) xD lol ngl fr
	cout << "\n\n\t6.Back to admin menu";
	cout << "\n\n\t7.Back to main menu";
	cout << "\n\n\tEnter your choice (1-7) : ";
	cin >> choice3;
	switch (choice3)
	{
	case 1:
		abc.createMember();
		break;
	case 2:
		abc.removeMember();
		break;
	case 3:
		abc.showMembers();
		break;
	case 4:
		abc.searchMember();
		break;
	case 5:
		abc.modifyMember();
		break;
	case 6:
		adminMenu();
		break;
	case 7:
		MainMenu();
		break;
	default:
		cin.clear();
		cin.ignore(1000, '\n');
		cout << "\n\n\tInvalid Choice,Try again.";
		goto x;
		break;
	}
}