SingUp.cpp

#include "SignUp.h"

string HashPassword(const string& password) {
   unsigned char hash[SHA256_DIGEST_LENGTH];

   SHA256(reinterpret_cast<const unsigned char*>(password.c_str()), password.size(), hash);

   // Convert hash to a hexadecimal string
   ostringstream oss;
   for (int i = 0; i < SHA256_DIGEST_LENGTH; ++i) {
       oss << hex << setw(2) << setfill('0') << (int)hash[i];
   }
   return oss.str();
}

void SignUpAndSignIn::MakeNewAccount()
{
	cout << "User name: ";
	string username;
	cin >> username;
	string password;
    cout << "Password: ";
	cin >> password;
    password = HashPassword(password);
    SaveAccountToFile(username, password);
}

void SignUpAndSignIn::SaveAccountToFile(string& username, string& hashedPassword)
{
   
    ifstream inputFile("accounts.json");
    json accounts;

    
    if (inputFile.is_open()) {
        inputFile >> accounts;
        inputFile.close();
    }

    accounts[username] = { {"password", hashedPassword}};

    
    ofstream outputFile("accounts.json");
    outputFile << setw(4) << accounts << endl;
    outputFile.close();
}


int SignUpAndSignIn::SignInToAccount() {
    cout << "User name: ";
    string username;
    cin >> username;

    cout << "Password: ";
    string password;
    cin >> password;

    if (username == "Admin" && password == "Admin")
    {
        cout << "Wellcome Admin \n";
        return 1;
    }

    string hashedPassword = HashPassword(password);
    
    
    ifstream inputFile("accounts.json");
    json accounts;

    if (inputFile.is_open()) {
        inputFile >> accounts;
        inputFile.close();
    }
    else {
        cout << "Error: Could not open accounts file.\n";
        return - 1;
    }


    if (accounts.contains(username) && accounts[username]["password"] == hashedPassword) {
        cout << "Sign-in successful. Welcome, " << username << "!\n";
        return 0;
    }
    else {
        cout << "Error: Invalid username or password.\n";
        return -1;
    }
}