Made drastic changes to UserDatabase and implemented User.Data storage is done through inbuilt serialization interface by Java, and not manually. Passed all the tests

Author: Madhavan7

src/main/java/User.java

@@ -0,0 +1,23 @@
+import java.io.Serializable;
+public class User implements Serializable{
+    private String username;
+    private String password;
+    private 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;
+    }
+    public String getPassword(){
+        return this.password;
+    }
+
+}

src/main/java/UserDatabase.java

@@ -1,6 +1,4 @@
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.PrintWriter;
+import java.io.*;
 import java.util.Scanner;
 public class UserDatabase implements UserExists, UserCreator{
     File accounts;
@@ -9,31 +7,40 @@ public UserDatabase(File accounts){
     }
     @Override
     public boolean UserExists(String username, String email) {
-        try(Scanner x = new Scanner(this.accounts)){
-            x.useDelimiter("\n");
-            while(x.hasNext()) {
-                String[] y = x.next().split(",");
-                if(y[0].equals(username) || y[2].equals(email)){
-                    return true;
+        User user = null;
+        try(FileInputStream fileIn = new FileInputStream(accounts);
+        ObjectInputStream in = new ObjectInputStream(fileIn)){
+            do{
+                try{
+                    user = (User)in.readObject();
+                }catch(NullPointerException e){
+                    break;
                 }
-            }
-        }catch(FileNotFoundException e){
-            System.out.println("Cannot find File");
-        };
-        return false;
+            }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) {
-            try(PrintWriter out = new PrintWriter(this.accounts)){
-                out.println(username + "," + password + "," + email + "," + "no" + "," + "offline");
-                out.flush();
-            }catch (FileNotFoundException e){
-                System.out.println("Error creating/writing to file");
-                e.printStackTrace();
-            };
+    public void createUser(String username, String password, String email){
+        User newUser = new User(username, password, email);
+        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");
+        }
     }
 }

src/test/java/TestUserDatabase2.csv

@@ -6,27 +6,27 @@
 public class UserDatabaseTest {
     @Test
     public void addingFilesRightEmailAndUser(){
-        File accounts = new File("TestUserDatabase.csv");
+        File accounts = new File("TestUserDatabase2.csv");
         UserDatabase accountDatabase = new UserDatabase(accounts);
         accountDatabase.createUser("MadhavGopakumar", "123", "[email protected]");
         Assertions.assertTrue(accountDatabase.UserExists("MadhavGopakumar", "[email protected]"));
     }
     @Test
     public void addingMultipleFiles(){
-        File accounts = new File("TestUserDatabase.csv");
+        File accounts = new File("TestUserDatabase2.csv");
         UserDatabase accountDatabase = new UserDatabase(accounts);
         accountDatabase.createUser("MeenakshiGopakumar", "123", "[email protected]");
         Assertions.assertTrue(accountDatabase.UserExists("MeenakshiGopakumar", "[email protected]"));
     }
     @Test
     public void rightEmailWrongUser(){
-        File accounts = new File("TestUserDatabase.csv");
+        File accounts = new File("TestUserDatabase2.csv");
         UserDatabase accountDatabase = new UserDatabase(accounts);
         Assertions.assertTrue(accountDatabase.UserExists("MadG", "[email protected]"));
     }
     @Test
     public void rightUserWrongEmail(){
-        File accounts = new File("TestUserDatabase.csv");
+        File accounts = new File("TestUserDatabase2.csv");
         UserDatabase accountDatabase = new UserDatabase(accounts);
         Assertions.assertTrue(accountDatabase.UserExists("MeenakshiGopakumar", "ma"));
     }