MainUserRegistPY

import os

USER_DATABASE = "user-authenticationr.txt"

def initialize_database():
    #bikin file database kalo belom ada di direktori (yang user-authentication.txt)
    try:
        with open(USER_DATABASE, "x") as file:
            print("User database created successfully!")
    except FileExistsError:
        print("User database already exists.")


def clear_database():
    #fungsi kalo mau hapus bersih database nya
    #(yang user-authentication.txt, tapi gak delete file fisiknya cuma delete isi nya)
    confirmation = input("Yakin mau delete database? (ketik iya/no): ").strip().lower()
    if confirmation == "iya":
        with open(USER_DATABASE, "w") as file:
            file.write("")  # string kosong biar isi filenya ilang semua
        print("Dah dihapus ya, gak bisa balik!")
    else:
        print("Oh gak jadi dihapus? oke")

def regist_main():
    Userna = input("Ketik username : ").strip()
    Passw = input("ketik password: ").strip()

    database_created = False
    # ngecek kalo database nya ada / ga
    if not os.path.exists(USER_DATABASE):  # deklarasi file gak ada / belum dibuat
        with open(USER_DATABASE, "x") as file:
            database_created = True  # deklarasi kalo file nya ada & udah dibuat

    if database_created:
    # Munculin pesan kalo database berhasil dibuat
        print("User database created successfully!")

    # Bagian ngecek username
    try:
        with open(USER_DATABASE, "r") as file:
            users = [line.split("|")[0] for line in file.readlines()]
    except FileNotFoundError:
        users = []

    # Ngecek kalo username nya udah ada biar gak double
    if Userna in users:
        print("Username already exists. Please try a different one.")
        return

    # Append/nambahin username yang baru
    with open(USER_DATABASE, "a") as file:
        file.write(f"{Userna}|{Passw}\n")
    print("Registration successful!")

def login_main():
    # login biasa
    Userne = input("Enter your Username: ").strip()
    Passwo = input("Enter your Password: ").strip()

    try:
        with open(USER_DATABASE, "r") as file:
            userand = file.readlines()

        if not userand:
            print("No users found. Start by registering first!")
            return

        for line in userand:
            username, password = line.strip().split("|")
            if username == Userne:
                if password == Passwo:
                    print("Login successful!")
                    return
                else:
                    print("Incorrect password!")
                    return

        print("Username not found. Please register first!")

    except FileNotFoundError:
        print("No data found. Start by registering first!")
    except Exception as e:
        print(f"An error occurred: {e}")

def main():
    initialize_database()  # make sure kalo database nya ada

    while True:
        print("\nLogin Panel       (ketik sesuai nomor buat masuk opsi)")
        print("1. Register       (A append + X)")
        print("2. Login          (R read)")
        print("3. Clear Database (W write)")
        print("4. Exit")
        choice = input("Choose an option (1-4): ").strip()

        if choice == "1":
            regist_main()
        elif choice == "2":
            login_main()
        elif choice == "3":
            clear_database()
        elif choice == "4":
            print("Goodbye!")
            break
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()