Made changes to UserDatabase. Implemented UserExists, and UserCreator

Author: Madhavan7

src/main/java/UserCreator.java

@@ -1,4 +1,3 @@
-import java.io.FileNotFoundException;
 
 public interface UserCreator {
     void createUser(String username, String password, String email);

src/main/java/UserDatabase.java

@@ -2,11 +2,21 @@
 import java.io.FileNotFoundException;
 import java.io.PrintWriter;
 import java.util.Scanner;
-public class UserDatabase implements UserRegPresenter, UserCreator{
+public class UserDatabase implements UserExists, UserCreator{
     @Override
-    public boolean UserExists() {
+    public boolean UserExists(String username, String email) {
         File accounts = new File("UserAccounts.csv");
-
+        try(Scanner x = new Scanner(accounts)){
+            x.useDelimiter("\n");
+            while(x.hasNext()) {
+                String[] y = x.next().split(",");
+                if(y[0].equals(username) || y[2].equals(email)){
+                    return true;
+                }
+            }
+        }catch(FileNotFoundException e){
+            System.out.println("Cannot find File");
+        };
         return false;
     }
 
@@ -17,7 +27,7 @@ public boolean UserExists() {
     public void createUser(String username, String password, String email) {
             File accounts = new File("UserAccounts.csv");
             try(PrintWriter out = new PrintWriter(accounts)){
-                out.println(username + "," + password + "," + email + "," + "no" + "offline");
+                out.println(username + "," + password + "," + email + "," + "no" + "," + "offline");
                 out.flush();
             }catch (FileNotFoundException e){
                 System.out.println("Error creating/writing to file");

src/main/java/UserExists.java

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