161 lines
4.5 KiB
Java
161 lines
4.5 KiB
Java
package envoy.client.data;
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import java.io.IOException;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Objects;
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import envoy.client.net.WriteProxy;
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import envoy.data.Contact;
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import envoy.data.Message;
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import envoy.data.Message.MessageStatus;
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import envoy.data.User;
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import envoy.event.MessageStatusChange;
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/**
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* Represents a chat between two {@link User}s
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* as a list of {@link Message} objects.
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* <p>
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* Project: <strong>envoy-client</strong><br>
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* File: <strong>Chat.java</strong><br>
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* Created: <strong>19 Oct 2019</strong><br>
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*
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* @author Maximilian Käfer
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* @author Leon Hofmeister
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* @author Kai S. K. Engelbart
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* @since Envoy Client v0.1-alpha
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*/
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public class Chat implements Serializable {
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protected final Contact recipient;
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protected final List<Message> messages = new ArrayList<>();
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protected int unreadAmount;
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/**
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* Stores the last time an {@link envoy.event.IsTyping} event has been sent.
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*/
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protected transient long lastWritingEvent;
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private static final long serialVersionUID = 1L;
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/**
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* Provides the list of messages that the recipient receives.
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* <p>
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* Saves the Messages in the corresponding chat at that Point.
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*
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* @param recipient the user who receives the messages
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* @since Envoy Client v0.1-alpha
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*/
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public Chat(Contact recipient) { this.recipient = recipient; }
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@Override
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public String toString() { return String.format("Chat[recipient=%s,messages=%d]", recipient, messages.size()); }
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/**
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* Generates a hash code based on the recipient.
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*
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* @since Envoy Client v0.1-beta
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*/
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@Override
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public int hashCode() { return Objects.hash(recipient); }
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/**
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* Tests equality to another object based on the recipient.
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*
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* @since Envoy Client v0.1-beta
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*/
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@Override
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public boolean equals(Object obj) {
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if (this == obj) return true;
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if (!(obj instanceof Chat)) return false;
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final Chat other = (Chat) obj;
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return Objects.equals(recipient, other.recipient);
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}
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/**
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* Sets the status of all chat messages received from the recipient to
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* {@code READ} starting from the bottom and stopping once a read message is
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* found.
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*
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* @param writeProxy the write proxy instance used to notify the server about
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* the message status changes
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* @throws IOException if a {@link MessageStatusChange} could not be
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* delivered to the server
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* @since Envoy Client v0.3-alpha
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*/
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public void read(WriteProxy writeProxy) throws IOException {
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for (int i = messages.size() - 1; i >= 0; --i) {
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final Message m = messages.get(i);
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if (m.getSenderID() == recipient.getID()) if (m.getStatus() == MessageStatus.READ) break;
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else {
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m.setStatus(MessageStatus.READ);
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writeProxy.writeMessageStatusChange(new MessageStatusChange(m));
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}
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}
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unreadAmount = 0;
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}
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/**
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* @return {@code true} if the newest message received in the chat doesn't have
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* the status {@code READ}
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* @since Envoy Client v0.3-alpha
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*/
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public boolean isUnread() { return !messages.isEmpty() && messages.get(messages.size() - 1).getStatus() != MessageStatus.READ; }
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/**
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* Inserts a message at the correct place according to its creation date.
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*
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* @param message the message to insert
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* @since Envoy Client v0.1-beta
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*/
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public void insert(Message message) {
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for (int i = messages.size() - 1; i >= 0; --i)
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if (message.getCreationDate().isAfter(messages.get(i).getCreationDate())) {
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messages.add(i + 1, message);
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return;
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}
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messages.add(0, message);
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}
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/**
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* Increments the amount of unread messages.
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*
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* @since Envoy Client v0.1-beta
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*/
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public void incrementUnreadAmount() { unreadAmount++; }
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/**
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* @return the amount of unread messages in this chat
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* @since Envoy Client v0.1-beta
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*/
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public int getUnreadAmount() { return unreadAmount; }
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/**
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* @return all messages in the current chat
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* @since Envoy Client v0.1-beta
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*/
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public List<Message> getMessages() { return messages; }
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/**
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* @return the recipient of a message
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* @since Envoy Client v0.1-alpha
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*/
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public Contact getRecipient() { return recipient; }
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/**
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* @return the last known time a {@link envoy.event.IsTyping} event has been
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* sent
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* @since Envoy Client v0.2-beta
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*/
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public long getLastWritingEvent() { return lastWritingEvent; }
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/**
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* Sets the {@code lastWritingEvent} to {@code System#currentTimeMillis()}.
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*
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* @since Envoy Client v0.2-beta
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*/
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public void lastWritingEventWasNow() { lastWritingEvent = System.currentTimeMillis(); }
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}
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