1 files changed, 37 insertions, 2 deletions

diff --git a/src/main/java/eu/siacs/conversations/entities/Conversation.java b/src/main/java/eu/siacs/conversations/entities/Conversation.java
index 725ed27b..63f341e7 100644
--- a/src/main/java/eu/siacs/conversations/entities/Conversation.java
+++ b/src/main/java/eu/siacs/conversations/entities/Conversation.java
@@ -16,6 +16,8 @@ import org.json.JSONObject;
 
 import java.security.interfaces.DSAPublicKey;
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
@@ -471,12 +473,25 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
-	public void setLastMessageReceived(long value) {
+	public boolean setLastMessageReceived(long value) {
+		long before = getLastMessageReceived();
 		this.setAttribute(ATTRIBUTE_LAST_MESSAGE_RECEIVED, String.valueOf(value));
+		return (value - before > 1000);
 	}
 
 	public long getLastMessageReceived() {
-		return getLongAttribute(ATTRIBUTE_LAST_MESSAGE_RECEIVED,0);
+		long timestamp = getLongAttribute(ATTRIBUTE_LAST_MESSAGE_RECEIVED,0);
+		if (timestamp == 0) {
+			synchronized (this.messages) {
+				for(int i = this.messages.size() - 1; i >= 0; --i) {
+					Message message = this.messages.get(i);
+					if (message.getStatus() == Message.STATUS_RECEIVED) {
+						return message.getTimeSent();
+					}
+				}
+			}
+		}
+		return timestamp;
 	}
 
 	public void setMutedTill(long value) {
@@ -544,6 +559,26 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
+	public void sort() {
+		synchronized (this.messages) {
+			for(Message message : this.messages) {
+				message.untie();
+			}
+			Collections.sort(this.messages,new Comparator<Message>() {
+				@Override
+				public int compare(Message left, Message right) {
+					if (left.getTimeSent() < right.getTimeSent()) {
+						return -1;
+					} else if (left.getTimeSent() > right.getTimeSent()) {
+						return 1;
+					} else {
+						return 0;
+					}
+				}
+			});
+		}
+	}
+
 	public class Smp {
 		public static final int STATUS_NONE = 0;
 		public static final int STATUS_CONTACT_REQUESTED = 1;