SignIn.cpp

#include "SignIn.hpp"

// Default Constructor
SignIn::SignIn() {
	len = 0;
	getcwd(cwd, sizeof(cwd));
	strcat(cwd, "/.data.txt");
	std::ofstream data;
	data.open(cwd, std::ios_base::app);
	data.close();
	Read();
}

// Function which provides the interface
void SignIn::Interface() {
	std::string choice;
	for(int i=0; i < 174; ++i) { std::cout << '*'; }
	std::cout << "\n\t\t\t\t\t\t\t__________________________"
		      << "\n\t\t\t\t\t\t\t| 1. LogIn | 2. Register |"
		      << "\n\nYour choice:\t";
	std::cin >> choice;
	if(choice == "Register") {
		Register();
		LogIn();
	}
	else if(choice == "LogIn") {
		LogIn();
	}
	Interface();
}

// This function writes information about new user in data
void SignIn::Write() {
	std::ofstream data;
	data.open(cwd, std::ios_base::app);
	data << "User: " << len << "\n"
		 << DataBase[len-1].getName() << "\n"
		 << DataBase[len-1].getSurnm() << "\n"
		 << DataBase[len-1].getBirth() << "\n"
		 << DataBase[len-1].getUsrnm() << "\n"
		 << DataBase[len-1].getPaswd() << "\n";
	data.close();
}

// This functions reads users' information from data and fills it into database 
void SignIn::Read() {
	std::ifstream data;
	std::string line;
	int count = 0;
	data.open(cwd);
	while( getline(data, line) ) {
		if ( count%6 == 0) {
			++len;
			User* temp = DataBase;
			DataBase = new User[len];
			for(int i = 0; i < len - 1; ++i) { DataBase[i] = temp[i]; }
			delete [] temp;
		}
		else if( count%6 == 1 ) { DataBase[len-1].setName(line); }
		else if( count%6 == 2 ) { DataBase[len-1].setSname(line); }
		else if( count%6 == 3 ) { DataBase[len-1].setBirth(line); }
		else if( count%6 == 4 ) { DataBase[len-1].setUsrnm(line); }
		else if( count%6 == 5 ) { DataBase[len-1].setPaswd(line); }
		++count;
	}
	data.close();
}

// This function provides the process of loging in
void SignIn::LogIn() {
	User temp;
	while(true) {
		int check = 0;
		std::string username = EnterUser();
		for(int i=0; i < len; ++i) {
			if( username == DataBase[i].getUsrnm() ) { 
				temp = DataBase[i];
				check = 1;
				break;
		       	}
		}
		if(check == 1) { break; }
		else
			std::cout << "\nNo such user name. Try again!\n";
	}
	int i=0;
	for(; i < 3; ++i) {
		int check = 0;
		std::string password = EnterPaswd();
		if( temp.getPaswd() == password ) {
			std::cout << "\nLoggin Successed!\nPress any key to continue...";
			char a;
			std::cin >> a;
			i = -1;
			break;
		}
		std::cout << "\nWrong password, try again!\n";
	}
	if(i != -1) {
		std::cerr << "\nWrong password, Loggin failed!\n";
		exit(1);
	}
}

// This function provides the process of registeration of new user
void SignIn::Register() {
	User newUser;
	do { std::cin >> newUser; }
	while(exist(newUser));
	User* t = DataBase;
	DataBase = new User[++len];
	for(int i = 0; i < len - 1; ++i)
		DataBase[i] = t[i];
	DataBase[len-1] = newUser;
	delete [] t;
	Write();
	std::cout << "\nRegisteration successed, now you can log in.\n\n";
}

// This functions checks if the current user exists
bool SignIn::exist(User& given) const
{
	for(int i = 0; i < len; ++i) {
		if(given.getUsrnm() == DataBase[i].getUsrnm()) {
			std::cout << "\nThe user already exists!\n";
			return true;
		}
	}
	return false;
}

// Username/Passord Entery Functions
std::string SignIn::EnterUser() {
	std::string username;
	std::cout << "____________\n| Username |\t";
	std::cin >> username;
	return username;
}
std::string SignIn::EnterPaswd() {
	std::string password;
	std::cout << "____________\n| Password |\t";
	std::cin >> password;
	return password;
}