create a chat Interactor instead of chat viewmodel

Author: Nasim Bondar Sahebi

src/main/java/chatlinitation/ChatInteractor.java

@@ -0,0 +1,37 @@
+package chatlinitation;
+
+
+
+import entities.PrivateChat;
+
+/**
+ * Chatinteractor  connects our ChatView UI to our Entities.
+ * It provide data to the view, so that view can put that data on the screen.
+ * this class contain Privatchat and methods to update the Private chat.
+ */
+
+public class ChatInteractor{
+
+    PrivateChat privatechat;
+
+
+    // constructor containing the  private chat
+    public ChatInteractor(PrivateChat privatechat) {
+        this.privatechat = privatechat;
+    }
+
+
+    //Update the Recipientusername when the user type in the username text field and click add button.
+    public void setRecipientUsername(String recipientUsername) {
+        this.privatechat.setRecipientUsername(recipientUsername) ;
+    }
+
+
+    // Update the message history when the type in put in message txtfieled and click send button.
+    public void setMessage(String content) {
+        MsgFactory msgfactory = new MsgFactory("text");
+        privatechat.addtoconvHist(msgfactory.createMsg(privatechat.getSendertUsername(), content));
+    }
+
+
+}