package envoy.client;
import java.io.Serializable;
import envoy.client.ui.list.ComponentListModel;
import envoy.data.Message;
import envoy.data.Message.MessageStatus;
import envoy.data.User;
/**
* Represents a chat between two {@link User}s
* as a list of {@link Message} objects.
*
* Project: envoy-client
* File: Chat.java
* Created: 19 Oct 2019
*
* @author Maximilian Käfer
* @author Leon Hofmeister
* @author Kai S. K. Engelbart
* @since Envoy v0.1-alpha
*/
public class Chat implements Serializable {
private static final long serialVersionUID = -7751248474547242056L;
private final User recipient;
private final ComponentListModel model = new ComponentListModel<>();
/**
* Provides the list of messages that the recipient receives.
* Saves the Messages in the corresponding chat at that Point.
*
* @param recipient the user who receives the messages
* @since Envoy v0.1-alpha
*/
public Chat(User recipient) { this.recipient = recipient; }
/**
* Appends a message to the bottom of this chat
*
* @param message the message to append
* @since Envoy v0.1-alpha
*/
public void appendMessage(Message message) { model.add(message); }
/**
* Sets the status of all chat messages received from the recipient to
* {@code READ} starting from the bottom and stopping once a read message is
* found.
*
* @since Envoy v0.3-alpha
*/
public void read() {
for (int i = model.size() - 1; i >= 0; --i)
if (model.get(i).getSenderId() == recipient.getId()) {
if (model.get(i).getStatus() == MessageStatus.READ) break;
else model.get(i).setStatus(MessageStatus.READ);
}
}
/**
* @return {@code true} if the newest message received in the chat doesn't have
* the status {@code READ}
* @since Envoy v0.3-alpha
*/
public boolean isUnread() { return !model.isEmpty() && model.get(model.size() - 1).getStatus() != MessageStatus.READ; }
/**
* @return all messages in the current chat
* @since Envoy v0.1-alpha
*/
public ComponentListModel getModel() { return model; }
/**
* @return the recipient of a message
* @since Envoy v0.1-alpha
*/
public User getRecipient() { return recipient; }
}