Show when private messages have been delivered.

briar-api/src/org/briarproject/api/db/MessageHeader.java

@@ -12,11 +12,11 @@ public class MessageHeader {
 	private final Author.Status authorStatus;
 	private final String contentType;
 	private final long timestamp;
-	private final boolean local, read;
+	private final boolean local, read, delivered;
 
 	public MessageHeader(MessageId id, MessageId parent, GroupId groupId,
 			Author author, Author.Status authorStatus, String contentType,
-			long timestamp, boolean local, boolean read) {
+			long timestamp, boolean local, boolean read, boolean delivered) {
 		this.id = id;
 		this.parent = parent;
 		this.groupId = groupId;
@@ -26,6 +26,7 @@ public class MessageHeader {
 		this.timestamp = timestamp;
 		this.local = local;
 		this.read = read;
+		this.delivered = delivered;
 	}
 
 	/** Returns the message's unique identifier. */
@@ -79,4 +80,12 @@ public class MessageHeader {
 	public boolean isRead() {
 		return read;
 	}
+
+	/**
+	 * Returns true if the message has been delivered. (This only applies to
+	 * locally generated private messages.)
+	 */
+	public boolean isDelivered() {
+		return delivered;
+	}
 }

briar-api/src/org/briarproject/api/event/MessagesAckedEvent.java

@@ -0,0 +1,27 @@
+package org.briarproject.api.event;
+
+import java.util.Collection;
+
+import org.briarproject.api.ContactId;
+import org.briarproject.api.messaging.MessageId;
+
+/** An event that is broadcast when messages are acked by a contact. */
+public class MessagesAckedEvent extends Event {
+
+	private final ContactId contactId;
+	private final Collection<MessageId> acked;
+
+	public MessagesAckedEvent(ContactId contactId,
+			Collection<MessageId> acked ) {
+		this.contactId = contactId;
+		this.acked = acked;
+	}
+
+	public ContactId getContactId() {
+		return contactId;
+	}
+
+	public Collection<MessageId> getMessageIds() {
+		return acked;
+	}
+}