Implemented UserLoginInteractor2

Author: Madhavan7

src/main/java/screens/user_registration_screen/UserRegistrationUI.java

@@ -86,7 +86,7 @@ public void getUserCredentials(){
     }
 
     public static void main(String[] args){
-        Database testDB = new UserDatabase(new File("newAccounts23"));
+        Database testDB = new UserDatabase(new File("new"));
         UserLoginInteractor2 userLoginInteractor2 = new UserLoginInteractor2(testDB, new UserChatsPresenter());
         UserLoginPresenter userLoginPresenter = new UserLoginPresenter(testDB, userLoginInteractor2);
         UserVerificationOutputView loginUI = new UserLoginUI(userLoginPresenter);

src/main/java/use_cases/user_login_use_cases/UserLoginInteractor2.java

@@ -1,15 +1,17 @@
 package use_cases.user_login_use_cases;
 
 import data_access.Database;
+import entities.chat.Chat;
 import entities.user_entities.User;
 
 import java.util.ArrayList;
+import java.util.List;
 
 public class UserLoginInteractor2 implements UserLoginInputBoundary {
     private final UserLoginOutputBoundary chatPresenter;
     private final Database database;
 
-    private User user;
+    private final List<String> chatsStrings = new ArrayList<>();
 
     public UserLoginInteractor2(Database database, UserLoginOutputBoundary chatPresenter){
         this.database = database;
@@ -20,8 +22,19 @@ public UserLoginInteractor2(Database database, UserLoginOutputBoundary chatPrese
     public void login(String username, String password) {
         //will update this.chatPresenter
         //TODO: change below, as its just temporary
-        user = database.getUser(username);
-
+        try {
+            User user = database.getUser(username);
+            this.chatPresenter.setPasswordNotMatched(!user.PasswordMatch(password));
+            this.chatPresenter.setUserNotExists(false);
+            List<Chat> chats = user.getChats();
+            for(Chat chat: chats){
+                this.chatsStrings.add(chat.getName());
+            }
+            this.chatPresenter.setChats(this.chatsStrings);
+        }catch(NullPointerException e){
+            this.chatPresenter.setUserNotExists(true);
+            this.chatPresenter.setChats(this.chatsStrings);
+        }
 
     }
 

src/test/java/test_user_login/TestUserLoginInteractor.java

@@ -0,0 +1,5 @@
+package test_user_login;
+
+public class TestUserLoginInteractor {
+
+}

src/test/java/test_user_login/TestUserLoginPresenter.java

@@ -0,0 +1,4 @@
+package test_user_login;
+
+public class TestUserLoginPresenter {
+}