UserInterface.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.InputMismatchException;
import java.util.Scanner;

public class UserInterface {
    private static String username;
    private static String password;
    static Scanner in = new Scanner(System.in);

    private static User user;
    public static void ProgramStart(){
        System.out.println("\t Welcome To our Facebook");
        System.out.println("1.Login");
        System.out.println("2.Signup");
        System.out.print("Enter a choice :");
        int choice=0;
        Boolean validate=new Boolean(false);
        while(!validate) {
            try {
                choice=in.nextInt();
                validate=true;
            } catch (InputMismatchException e) {
                System.out.println("invaild choice try again");
                System.out.print("Enter a choice :");
                in.nextLine();
            }
        }
        switch (choice) {
            case 1:
                user = LogIn();
                break;
            case 2:
                user = SignUp();
                break;
            default:
                System.out.println("Invalid Choice please try again :( ");

        }


    }
    public static User LogIn() {
        User user;
        System.out.println("Login page");
        System.out.println("-if you want to return to main menu enter 0 -");
        System.out.println("Enter Username :");
        username = in.next();
        if (username.equals("0")) {
            ProgramStart();
        }
        while (username.isEmpty()){
            System.out.println("Username is Empty please Try again :( ");
            System.out.println("Enter Username :");
            username = in.next();
            if (username.equals("0")) {
                ProgramStart();
            }
        }
        System.out.println("Enter Password :");
        password = in.next();
        if (password.equals("0")) {
            ProgramStart();
        }
        while (password.isEmpty()){
            System.out.println("Password is Empty please Try again :( ");
            System.out.println("Enter Password :");
            password = in.next();
            if (password.equals("0")) {
                ProgramStart();
            }
        }
        if(!LoginStatus(username,password)){
            System.out.println("Username or Password is not correct please Try again :( ");
            LogIn();
        }
        new Feed(Feed.GetUserData(username));
        return Feed.GetUserData(username);
    }

    public static User SignUp() {
        BufferedReader reader =new BufferedReader(new InputStreamReader(System.in));

        System.out.println("/t Welcome To our Facebook");
        System.out.println("Enter Username (at least 8 chars):");
        username = in.next();
        while (username.length() < 8){
            System.out.println("Username is Empty please Try again :( ");
            System.out.println("Enter Username :");
            username = in.next();
        }
        while (!CheckUserIsUnique(username)){
            System.out.println("Username is already exist please Try another one :) ");
            System.out.println("Enter Username :");
            username = in.next();
        }

        System.out.println("Enter Password :");
        password = in.next();

        while (password.length()<8){
            System.out.println("Password is Empty please Try again :( ");
            System.out.println("Enter Password :");
            password = in.next();
        }
        user=new User(username, password);
        System.out.println("SignUp Successful");
        System.out.println("\n\n\tNow you need to enter some information");
        System.out.println("Enter your name:");

        String name = new String();
        try {
            name = reader.readLine(); // Read a line of text from the console
        } catch (IOException e) {
            System.out.println("Error reading input: " + e.getMessage());
        }

        while (name.isEmpty()){
            System.out.println("name is Empty please Try again :( ");
            System.out.println("Enter your name :");
            try {
                name = reader.readLine(); // Read a line of text from the console
            } catch (IOException e) {
                System.out.println("Error reading input: " + e.getMessage());
            }
        }
        System.out.println("Enter gender :");
        String gender=in.next();
        while ((!(gender.toLowerCase()).equals("female")) && (!(gender.toLowerCase()).equals("male"))){
            System.out.println("gender is not valid please Try again :( ");
            System.out.println("Enter gender :");
            gender = in.next();
        }
        Long phonenumber=new Long(0);
        while (true) {
            System.out.println("Please enter your phone number (digits only): ");
            String input = in.next();

            if (!input.matches("[0-9]+")) {
                System.out.println("Phone number should contain digits only. Please try again.");

            } else if (!(phonenumber<99999999)) {
                System.out.println("Phone Number is not valid please Try again :( ");

            } else {
                phonenumber = Long.parseLong(input);
                break; // Exit the loop if the input contains only digits
            }
        }

        System.out.println("Enter E_mail :");
        String email = in.next();
        while (email.isEmpty() || email.contains(" ") || !email.contains("@") || email.length()<10){
            System.out.println("E_mail is Empty please Try again :( ");
            System.out.println("Enter E_mail :");
            email = in.next();
        }

        SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
        dateFormat.setLenient(false);
        Date dateOfBirth = null;
        Boolean isValidDate = new Boolean(false);
        System.out.print("Please enter your date of birth (YYYY-MM-DD): ");
        String userInput = in.next();
        while (!isValidDate){
            try {
                dateOfBirth = dateFormat.parse(userInput);
                isValidDate = true;
            } catch (ParseException e) {
                System.out.println("Invalid date format. Please enter the date in YYYY-MM-DD format.");
                userInput = in.next();
            }
        }
        //===========================
        user.setName(name);
        user.setPhoneNumber(phonenumber);
        user.setEmail(email);
        user.setBirthdate(dateOfBirth);
        if(gender.equals("female")){
            user.setGender(User.GenderOptions.FEMALE);
        }
        else if (gender.equals("male")){
            user.setGender(User.GenderOptions.MALE);
        }
        else{
            user.setGender(User.GenderOptions.NONE);
        }
        System.out.println(user.getGender());
        Main.vec.add(user);
        System.out.println("Wish you enjoy our facebook :)");
        //=============================
        new Feed(user);
        return user;
    }
    public static boolean CheckUserIsUnique (String Username){
        for (User user:Main.vec){
            if(user.getUserName().equals(Username)){
                return false;
            }
        }
        return true;
    }
    public static boolean LoginStatus(String Username,String Password){
        for (User user:Main.vec){
            if(user.getUserName().equals(Username) && user.getPassword().equals(Password)){
                return true;
            }
        }
        return false;
    }


}