From f88b8c703eca10f6a0b96e01e5ba912b02488759 Mon Sep 17 00:00:00 2001
From: Daniel Gultsch <daniel@gultsch.de>
Date: Thu, 4 Feb 2016 11:55:42 +0100
Subject: add more fault tolerant checks for messages left on server

---
 .../eu/siacs/conversations/entities/Conversation.java   |  9 +++++++++
 .../conversations/services/MessageArchiveService.java   | 17 +++++++++++------
 .../conversations/services/XmppConnectionService.java   |  2 +-
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/src/main/java/eu/siacs/conversations/entities/Conversation.java b/src/main/java/eu/siacs/conversations/entities/Conversation.java
index 22607fc6..f2c08b9a 100644
--- a/src/main/java/eu/siacs/conversations/entities/Conversation.java
+++ b/src/main/java/eu/siacs/conversations/entities/Conversation.java
@@ -81,6 +81,7 @@ public class Conversation extends AbstractEntity implements Blockable {
 	private ChatState mOutgoingChatState = Config.DEFAULT_CHATSTATE;
 	private ChatState mIncomingChatState = Config.DEFAULT_CHATSTATE;
 	private String mLastReceivedOtrMessageId = null;
+	private String mFirstMamReference = null;
 
 	public boolean hasMessagesLeftOnServer() {
 		return messagesLeftOnServer;
@@ -277,6 +278,14 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
+	public void setFirstMamReference(String reference) {
+		this.mFirstMamReference = reference;
+	}
+
+	public String getFirstMamReference() {
+		return this.mFirstMamReference;
+	}
+
 	public interface OnMessageFound {
 		void onMessageFound(final Message message);
 	}
diff --git a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
index 0d8e49d6..a225760f 100644
--- a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
+++ b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
@@ -102,6 +102,7 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 				return null;
 			}
 			final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
+			query.reference = conversation.getFirstMamReference();
 			this.queries.add(query);
 			this.execute(query);
 			return query;
@@ -141,7 +142,7 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 						}
 					} else if (packet.getType() != IqPacket.TYPE.RESULT) {
 						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
-						finalizeQuery(query);
+						finalizeQuery(query, true);
 					}
 				}
 			});
@@ -152,14 +153,14 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		}
 	}
 
-	private void finalizeQuery(Query query) {
+	private void finalizeQuery(Query query, boolean done) {
 		synchronized (this.queries) {
 			this.queries.remove(query);
 		}
 		final Conversation conversation = query.getConversation();
 		if (conversation != null) {
 			conversation.sort();
-			conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
+			conversation.setHasMessagesLeftOnServer(!done);
 		} else {
 			for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
 				if (tmp.getAccount() == query.getAccount()) {
@@ -202,9 +203,13 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		Element first = set == null ? null : set.findChild("first");
 		Element relevant = query.getPagingOrder() == PagingOrder.NORMAL ? last : first;
 		boolean abort = (query.getStart() == 0 && query.getTotalCount() >= Config.PAGE_SIZE) || query.getTotalCount() >= Config.MAM_MAX_MESSAGES;
+		if (query.getConversation() != null) {
+			query.getConversation().setFirstMamReference(first == null ? null : first.getContent());
+		}
 		if (complete || relevant == null || abort) {
-			this.finalizeQuery(query);
-			Log.d(Config.LOGTAG,query.getAccount().getJid().toBareJid().toString()+": finished mam after "+query.getTotalCount()+" messages");
+			final boolean done = (complete || query.getMessageCount() == 0) && query.getStart() == 0;
+			this.finalizeQuery(query, done);
+			Log.d(Config.LOGTAG,query.getAccount().getJid().toBareJid()+": finished mam after "+query.getTotalCount()+" messages. messages left="+Boolean.toString(!done));
 			if (query.getWith() == null && query.getMessageCount() > 0) {
 				mXmppConnectionService.getNotificationService().finishBacklog(true);
 			}
@@ -216,7 +221,7 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 				nextQuery = query.prev(first == null ? null : first.getContent());
 			}
 			this.execute(nextQuery);
-			this.finalizeQuery(query);
+			this.finalizeQuery(query, false);
 			synchronized (this.queries) {
 				this.queries.remove(query);
 				this.queries.add(nextQuery);
diff --git a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
index 6735b9cc..73f17e3b 100644
--- a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
+++ b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
@@ -1230,7 +1230,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						&& account.isOnlineAndConnected()) {
 					if ((conversation.getMode() == Conversation.MODE_SINGLE && account.getXmppConnection().getFeatures().mam())
 							|| (conversation.getMode() == Conversation.MODE_MULTI && conversation.getMucOptions().mamSupport())) {
-						MessageArchiveService.Query query = getMessageArchiveService().query(conversation, 0, timestamp - 1);
+						MessageArchiveService.Query query = getMessageArchiveService().query(conversation, 0, timestamp);
 						if (query != null) {
 							query.setCallback(callback);
 						}
-- 
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