Added some changes to invert dependency

Author: amyyong11

src/main/java/interface_adapters/appscreen/AppScreenLoader.java

@@ -2,6 +2,7 @@
 
 import entities.chat.Chat;
 import screens.appscreen.AppScreen;
+import use_cases.appscreen.AppScreenStatus;
 
 import java.util.ArrayList;
 
@@ -28,6 +29,10 @@ public AppScreenLoader(String username, ArrayList<Chat> chats){
     public void openScreen() {
         try {
             this.appScreen = new AppScreen(this.username, this.chats);
+
+            // set and save the current app screen
+            AppScreenStatus.setAppScreen(this.appScreen);
+
         } catch (Exception e) {
             throw new RuntimeException("Unexpected Interruption: cannot load screen");
         }

src/main/java/use_cases/appscreen/AppScreenRequestModel.java

@@ -1,17 +1,13 @@
 package use_cases.appscreen;
 
 import interface_adapters.appscreen.AppScreenController;
-import interface_adapters.appscreen.Refresh;
 
-public class AppScreenRequestModel implements Refresh {
-    private final AppScreenController appScreenController;
+public class AppScreenRequestModel {
 
     public AppScreenRequestModel(String username, String chatID){
-        this.appScreenController = new AppScreenController(username, chatID);
+        AppScreenController appScreenController = new AppScreenController(username, chatID);
+        appScreenController.updateScreen();
+        AppScreenResponseModel.refreshScreen(chatID);
     }
 
-    @Override
-    public void refreshScreen(String chatID) {
-        this.appScreenController.updateScreen();
-    }
 }

src/main/java/use_cases/appscreen/AppScreenResponseModel.java

@@ -1,14 +1,8 @@
 package use_cases.appscreen;
 
-import screens.appscreen.AppScreen;
-
 public class AppScreenResponseModel {
 
-    AppScreen appScreen;
-    String chatID;
-    public AppScreenResponseModel(AppScreen appScreen, String chatID){
-        this.appScreen = appScreen;
-        this.chatID = chatID;
-        appScreen.refreshScreen(chatID);
+    public static void refreshScreen(String chatID) {
+        AppScreenStatus.getAppScreen().refreshScreen(chatID);
     }
 }

src/main/java/use_cases/appscreen/AppScreenStatus.java

@@ -0,0 +1,32 @@
+package use_cases.appscreen;
+
+import screens.appscreen.AppScreen;
+
+public class AppScreenStatus {
+
+    public static AppScreen appScreen;
+
+    /**
+     * Create an empty constructor, so we can access the current app screen in a static context
+     * (so we can access it globally)
+     */
+    public AppScreenStatus(){
+
+    }
+
+    /**
+     * Set current status to be this app screen
+     * @param thisAppScreen The current app screen
+     */
+    public static void setAppScreen(AppScreen thisAppScreen){
+        appScreen = thisAppScreen;
+    }
+
+    /**
+     * Return the current app screen
+     * @return current app screen
+     */
+    public static AppScreen getAppScreen(){
+        return appScreen;
+    }
+}