Deleted UserChatGateway and made changes to the flow of opening a screen

Author: amyyong11

src/main/java/appscreen/AppScreen.java

@@ -17,7 +17,7 @@ public class AppScreen implements AppScreenPresenter, AppScreenController, ChatN
 
 
     /**
-    Create an AppScreen object
+    Create an appscreen.AppScreen object
     @param chats This is a list of chats given by the user (the list will always come as sorted with the
     most recent chats at the end of the list)
      */
@@ -88,7 +88,7 @@ public void displayAppScreen(){
                 public void actionPerformed(ActionEvent e) {
 
                     /* TODO: call chatView to open the display the window (?) for chat
-                     - not sure if AppScreen and ChatView would be combined into one window, or
+                     - not sure if appscreen.AppScreen and ChatView would be combined into one window, or
                        two separate windows
                      */
                 }

src/main/java/appscreen/AppScreenPresenter.java

@@ -1,4 +1,5 @@
 package appscreen;
+
 public interface AppScreenPresenter {
     void displayAppScreen();
 }

src/main/java/appscreen/LoginSuccess.java

@@ -1,4 +1,8 @@
 package appscreen;
+
+import testerEntities.*;
+import java.util.ArrayList;
+
 public interface LoginSuccess {
     void openScreen();
 }

src/main/java/appscreen/Refresh.java

@@ -1,5 +1,9 @@
 package appscreen;
+
+import testerEntities.*;
+
 public interface Refresh {
-    boolean hasUpdate(String chatID);
-    void updateScreen(String chatID);
+    boolean hasUpdate(Chat chat);
+
+    void updateScreen(Chat chat);
 }