Implemented GroupMessage reading (sending the right event)

Note: changed a lambda expression in LocalDB and not 100% sure if it is correct

src/main/java/envoy/client/data/Chat.java

@@ -2,6 +2,7 @@ package envoy.client.data;
 
 import java.io.IOException;
 import java.io.Serializable;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
@@ -9,6 +10,7 @@ import java.util.Objects;
 import envoy.client.net.WriteProxy;
 import envoy.data.*;
 import envoy.data.Message.MessageStatus;
+import envoy.event.GroupMessageStatusChange;
 import envoy.event.MessageStatusChange;
 
 /**
@@ -27,18 +29,25 @@ import envoy.event.MessageStatusChange;
 public final class Chat implements Serializable {
 
 	private final Contact		recipient;
+	private final Contact		sender;
 	private final List<Message>	messages	= new ArrayList<>();
 
 	private static final long serialVersionUID = 1L;
 
 	/**
-	 * Provides the list of messages that the recipient receives.<p>
+	 * Provides the list of messages that the recipient receives.
+	 * <p>
 	 * Saves the Messages in the corresponding chat at that Point.
 	 *
 	 * @param recipient the user who receives the messages
+	 * @param sender    the user who is logged in as sender on this instance of
+	 *                  envoy.client
 	 * @since Envoy Client v0.1-alpha
 	 */
-	public Chat(Contact recipient) { this.recipient = recipient; }
+	public Chat(Contact recipient, Contact sender) {
+		this.recipient	= recipient;
+		this.sender		= sender;
+	}
 
 	@Override
 	public String toString() { return String.format("Chat[recipient=%s,messages=%d]", recipient, messages.size()); }
@@ -78,10 +87,22 @@ public final class Chat implements Serializable {
 	public void read(WriteProxy writeProxy) throws IOException {
 		for (int i = messages.size() - 1; i >= 0; --i) {
 			final Message m = messages.get(i);
-			if (m.getSenderID() == recipient.getID()) if (m.getStatus() == MessageStatus.READ) break;
-			else {
-				m.setStatus(MessageStatus.READ);
-				writeProxy.writeMessageStatusChange(new MessageStatusChange(m));
+			if(m.getClass().equals(GroupMessage.class)) {
+				GroupMessage g = (GroupMessage) m;
+				if (g.getSenderID() != sender.getID()) {
+					if (g.getMemberStatuses().get(sender.getID()) == MessageStatus.READ) break;
+					else {
+						g.getMemberStatuses().replace(sender.getID(), MessageStatus.READ);
+						writeProxy.writeMessageStatusChange(
+								new GroupMessageStatusChange(g.getID(), MessageStatus.READ, LocalDateTime.now(), sender.getID()));
+					}
+				}
+			}else {
+				if (m.getSenderID() == recipient.getID()) if (m.getStatus() == MessageStatus.READ) break;
+				else {
+					m.setStatus(MessageStatus.READ);
+					writeProxy.writeMessageStatusChange(new MessageStatusChange(m));
+				}
 			}
 		}
 	}

src/main/java/envoy/client/data/LocalDB.java

@@ -82,7 +82,7 @@ public abstract class LocalDB {
 				getChat(contact.getID()).ifPresent(chat -> { ((User) chat.getRecipient()).setStatus(((User) contact).getStatus()); });
 
 		// Create missing chats
-		user.getContacts().stream().filter(u -> !u.equals(user) && getChat(u.getID()).isEmpty()).map(Chat::new).forEach(chats::add);
+		user.getContacts().stream().filter(u -> !u.equals(user) && getChat(u.getID()).isEmpty()).map(u -> new Chat(u, user)).forEach(chats::add);
 	}
 
 	/**

src/main/java/envoy/client/ui/controller/ChatScene.java

@@ -146,7 +146,7 @@ public final class ChatScene {
 			switch (e.getOperationType()) {
 				case ADD:
 					localDB.getUsers().put(contact.getName(), contact);
-					localDB.getChats().add(new Chat(contact));
+					localDB.getChats().add(new Chat(contact, client.getSender()));
 					Platform.runLater(() -> userList.getItems().add(contact));
 					break;
 				case REMOVE: