Added server list updates, and added lobby

- Server list updates when a server is added/removed
- Player can host a server
- Lobby view shows players connected

Tags: #pair[mra106, hyi25] #story[1245]

src/main/java/seng302/visualiser/controllers/ViewManager.java

@@ -1,16 +1,25 @@
 package seng302.visualiser.controllers;
 
 import com.jfoenix.controls.JFXDecorator;
+import javafx.collections.ObservableList;
+import javafx.fxml.FXMLLoader;
 import javafx.scene.Node;
+import javafx.scene.Parent;
 import seng302.visualiser.GameClient;
 
+import java.io.IOException;
+import java.util.HashMap;
+
 public class ViewManager {
 
     private static ViewManager instance;
     private GameClient gameClient;
     private JFXDecorator decorator;
+    private HashMap<String, String> props; //TODO is this the best way to do this??
+    private ObservableList<String> playerList;
 
     private ViewManager(){
+        props = new HashMap<>();
         gameClient = new GameClient(decorator);
     }
 
@@ -34,8 +43,33 @@ public class ViewManager {
         decorator.setContent(scene);
     }
 
+    public void goToStartView() {
+        try {
+            Parent root = FXMLLoader.load(getClass().getResource("/views/StartScreenView.fxml"));
+            this.setScene(root);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+    }
+
     public GameClient getGameClient(){
         return gameClient;
     }
 
+    public String getProperty(String key){
+        return props.get(key);
+    }
+
+    public void setProperty(String key, String val){
+        props.put(key, val);
+    }
+
+    public void setPlayerList(ObservableList<String> playerList) {
+        this.playerList = playerList;
+    }
+
+    public ObservableList<String> getPlayerList(){
+        return playerList;
+    }
 }