Wrote some code for the UI

Author: Madhavan7

src/main/java/BasicUser.java

@@ -0,0 +1,5 @@
+public class BasicUser extends User{
+    public BasicUser(String Username, String Password, String Email){
+        super(Username, Password, Email);
+    }
+}

src/main/java/IRetrieveList.java

@@ -0,0 +1,5 @@
+import java.util.List;
+
+public interface IRetrieveList {
+    List<User> getList();
+}

src/main/java/User.java

@@ -0,0 +1,35 @@
+import java.io.Serializable;
+public abstract class User implements Serializable, Changeable{
+    protected String username;
+    protected String password;
+    protected String email;
+    boolean verified = false;
+    boolean online = false;
+    public User(String username, String password, String email){
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+    public String getEmail(){
+        return this.email;
+    }
+    public String getUsername(){
+        return this.username;
+    }
+    private String getPassword(){
+        return this.password;
+    }
+
+    @Override
+//    from Changeable
+    public void changeFeature(String feature, String newFeature){
+        if (feature == "Username"){
+            this.username = newFeature;
+        } else if (feature == "Password"){
+            this.password = newFeature;
+        } else if (feature == "Email"){
+            this.email = newFeature;
+        }
+    }
+
+}

src/main/java/UserAccounts.csv

@@ -0,0 +1,4 @@
+
+public interface UserCreator {
+    void createUser(String username, String password, String email, String type);
+}

src/main/java/UserCreator.java

@@ -0,0 +1,79 @@
+import java.io.*;
+import java.util.ArrayList;
+import java.util.List;
+public class UserDatabase implements UserExists, UserRetriever, UserCreator, IRetrieveList{
+    File accounts;
+    public UserDatabase(){
+        this.accounts = new File("UserAccounts.csv");
+    }
+    public UserDatabase(File accounts){
+        this.accounts = accounts;
+    }
+    @Override
+    public boolean UserExists(String username, String email) {
+        User user = null;
+        try(FileInputStream fileIn = new FileInputStream(accounts);
+        ObjectInputStream in = new ObjectInputStream(fileIn)){
+            do{
+                try{
+                    user = (User)in.readObject();
+                }catch(NullPointerException e){
+                    break;
+                }
+            }while(!user.getEmail().equals(email) && !user.getUsername().equals(username));
+        }catch(IOException e){
+            e.printStackTrace();
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+        return user != null;
+    }
+
+    // Creates a new user with a username and password, and an email address
+    // The order is username, password, email address, verification status, status
+    //
+    @Override
+    public void createUser(String username, String password, String email, String type){
+        User newUser = UserFactory.BirthUser(username, password, email, type);
+        try(FileOutputStream fileOut = new FileOutputStream(accounts)){
+            try(ObjectOutputStream out = new ObjectOutputStream(fileOut)){
+                out.writeObject(newUser);
+                out.close();
+                fileOut.close();
+            }catch(Exception e){
+                System.out.println("Error");
+            }
+        }catch(Exception e){
+            System.out.println("Error");
+        }
+    }
+
+    @Override
+//  To be edited to get user from the array format rather than the serialized format.
+    public User getUser(String username) {
+        User ans = null;
+        for (int i = 0; i < (this.getList().size()); i++) {
+            if (this.getList().get(i).getUsername().equals(username)) {
+                ans = this.getList().get(i);
+            }
+        }
+        return ans;
+    }
+
+    //Returns an ArrayList with the users that is extracted from the file, so that other objects can use this list.
+    @Override
+    public List<User> getList() {
+        List<User> users = new ArrayList<>();
+        try(FileInputStream fileIn = new FileInputStream(accounts);
+            ObjectInputStream in = new ObjectInputStream(fileIn)){
+            User user = (User) in.readObject();
+            while(user != null){
+                users.add(user);
+                user = (User)in.readObject();
+            }
+        }catch(Exception e){
+            e.printStackTrace();
+        }
+        return users;
+    }
+}

src/main/java/UserDatabase.java

@@ -0,0 +1,3 @@
+public interface UserExists {
+    boolean UserExists(String username, String password);
+}

src/main/java/UserExists.java

@@ -0,0 +1,6 @@
+public class UserFactory {
+    //Following the factory design pattern, just in case in the future we decide to add various different types of Users
+    public static User BirthUser(String Username, String Password, String Email, String type){
+        return new BasicUser(Username, Password, Email);
+    }
+}

src/main/java/UserFactory.java

@@ -0,0 +1,3 @@
+public interface UserRegPresenter {
+    boolean UserExists();
+}

src/main/java/UserRegPresenter.java

@@ -1,19 +1,50 @@
 import javax.swing.*;
 
 public class UserRegistrationUI implements UserRegistrationUseCase{
-    UserDatabase database = new UserDatabase();
+    private UserDatabase database;
+
+    public UserRegistrationUI(UserDatabase database){
+        this.database = database;
+    }
     void GetUserCredentials(){
         JFrame RegisterFrame = new JFrame();
+        RegisterFrame.setSize(1000, 1000);
+        RegisterFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         JPanel RegisterPanel = new JPanel();
+        RegisterFrame.add(RegisterPanel);
+
+        //The textbox for entering the Username
+        RegisterPanel.setLayout(null);
+        JLabel usernameLabel = new JLabel("Username");
+        usernameLabel.setBounds(10, 25, 100, 25);
+
+        JTextField usernameText = new JTextField(20);
+        usernameText.setBounds(100, 20, 165, 25);
+        RegisterPanel.add(usernameText);
 
+        //The textbox for entering the password
+        JPasswordField passwordText = new JPasswordField();
+        passwordText.setBounds(100, 50, 165, 25);
+        RegisterPanel.add(passwordText);
+
+        //The textbox for entering the email
+        JLabel
+
+        RegisterFrame.setVisible(true);
     }
     @Override
     public void registerUser(String username, String password, String email) {
-        if(database.userExists(username, password, email)){
+        if(database.UserExists(username, email)){
             System.out.println("The username or password is already in use, please try again");
         }else{
             database.createUser(username, password, email, "Basic");
             System.out.println("Your account has been created, please verify to login");
         }
     }
+
+    public static void main(String[] args){
+        UserDatabase testDB = new UserDatabase();
+        UserRegistrationUI testUI = new UserRegistrationUI(testDB);
+        testUI.GetUserCredentials();
+    }
 }