MP1_INFOSEC_LogicBomb

.gitignore

LogicBomb

MP1_LogicBomb.cpp

#include<iostream>
#include<string>

using namespace std;

// VARIABLE ALIASES ========================
typedef int CTR;
typedef int LIST_SIZE;
typedef string USER_INPUT;

// ACCOUNT DATA STRUCTURE SCHEMA ===========
struct Account {
    string Username;
    string Password;
    Account* Next;
}*GenesisBlock = NULL, *PlatformBlk, *AccountSet, *Cap = NULL;

// DATA STRUCTURE TESTS ====================
bool LinkedListEmpty() {
    if(GenesisBlock==NULL)
        return 1;
    else
        return 0; 
}

// DATA STRUCTURE OPERATIONS ===============
// Login a User ============================
void UserLoginCheck(USER_INPUT Username, USER_INPUT Passwd, bool* isLoggedIn){

    if(LinkedListEmpty())
        cout << "\nThere are no accounts stored.";

    else{
        PlatformBlk = GenesisBlock;

        while(PlatformBlk != NULL && PlatformBlk->Username != Username){

            PlatformBlk = PlatformBlk->Next;

        }

        if(PlatformBlk == NULL){
            *isLoggedIn =  false;
        }
        // did not find any matching usernames

        else{

            cout << "Found Searches:\n";
            cout << "\tUsername: " << PlatformBlk->Username << endl;
            cout << "\tPassword: " << PlatformBlk->Password << endl << endl; 

            if(PlatformBlk->Password == Passwd)
                *isLoggedIn =  true;
                // found the matching username, and tests if the password matches
            
        }

    }

}

// Login Content Example ===================
void LoginContent(bool* isLoggedIn){
    cout << "\n\nWelcome! You have successfully logged in!\n";
    cout << "Sorry if there is nothing much to do as of now\n";
    cout << "\nPress enter to logout\n> ";
    cin.get();
    *isLoggedIn = 0;

}

// Print all Existing Users ================
void PrintItems() {

    CTR IDX;

    if(LinkedListEmpty())
        cout << "There are no accounts stored\n";

    else {
        PlatformBlk = GenesisBlock;

        while(PlatformBlk!=NULL){
            cout << "Username: " << PlatformBlk->Username << endl;
            cout << "Password: " << PlatformBlk->Password << endl << endl;

            PlatformBlk = PlatformBlk->Next;
        }
    }
}

// Sign Up a new user ======================
void UserSignup(USER_INPUT Username, USER_INPUT Password){

    Account *InsertAccount;

    if(GenesisBlock == NULL){
    // Sets username and password into an AccountSet object
    InsertAccount = (Account*) malloc(sizeof(Account));

    InsertAccount->Username = Username;
    InsertAccount->Password = Password;
    InsertAccount->Next = NULL;

    // Sets it as the Genesis Block/Start of the linked list
    GenesisBlock = InsertAccount;
    AccountSet = GenesisBlock;

    }
    else{

    InsertAccount = (Account*) malloc(sizeof(Account));

    InsertAccount->Username = Username;
    InsertAccount->Password = Password;
    InsertAccount->Next = NULL;

    if(AccountSet == GenesisBlock){
        GenesisBlock->Next = InsertAccount;
        AccountSet = InsertAccount;
        Cap = InsertAccount;
    }
    else{
        AccountSet->Next = InsertAccount;
        Cap = InsertAccount;
        AccountSet = AccountSet->Next;
    }

    }
}

// MAIN PROGRAM ============================
int main() {

    USER_INPUT username, password;
    int choice;
    bool isLoggedIn = false;


    do{

        cout << "Welcome To TAMS!" << endl;
        cout << "What do you want to do?" << endl;
        cout << "(1) -> Print All Users; (2) -> Sign Up; (3) -> Login; (4) Exit\n\n> ";

        cin >> choice;

        switch (choice) {

            case 1:
                PrintItems();
                break;

            case 2:
                cout << "\nWelcome New User!\n";
                cout << "Please Enter your credentials:\n";
                cout << "Username: ";
                cin.get();
                getline(cin, username);
                cout << "Password: ";
                getline(cin, password);
                UserSignup(username, password);
                cout << "Successfully signed up! You can enter (3) to login."; 
                break;

            case 3:
                cout << "\nWelcome Existing User!\n";
                cout << "Please Enter your credentials:\n";
                cout << "Username: ";
                cin.get();
                getline(cin, username);
                cout << "Password: ";
                getline(cin, password);
                UserLoginCheck(username, password, &isLoggedIn);
                if (!isLoggedIn){
                    cout << "\n\nInvalid Username or password! Please try again\n\n";
                    break;
                }
                else{
                    LoginContent(&isLoggedIn);
                    if(!isLoggedIn)
                        break;
                }

            default:
                cout << "\n\nThank you for using this program, goodbye!\n\n";

        }


    }while(choice != 4);

}