1 files changed, 366 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
new file mode 100644
index 00000000..82111243
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
@@ -0,0 +1,366 @@
+package eu.siacs.conversations.services;
+
+import android.util.Log;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.generator.AbstractGenerator;
+import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
+import eu.siacs.conversations.xmpp.OnIqPacketReceived;
+import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.xmpp.stanzas.IqPacket;
+
+public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
+
+	private final XmppConnectionService mXmppConnectionService;
+
+	private final HashSet<Query> queries = new HashSet<Query>();
+	private final ArrayList<Query> pendingQueries = new ArrayList<Query>();
+
+	public enum PagingOrder {
+		NORMAL,
+		REVERSE
+	};
+
+	public MessageArchiveService(final XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public void catchup(final Account account) {
+		long startCatchup = getLastMessageTransmitted(account);
+		long endCatchup = account.getXmppConnection().getLastSessionEstablished();
+		if (startCatchup == 0) {
+			return;
+		} else if (endCatchup - startCatchup >= Config.MAM_MAX_CATCHUP) {
+			startCatchup = endCatchup - Config.MAM_MAX_CATCHUP;
+			List<Conversation> conversations = mXmppConnectionService.getConversations();
+			for (Conversation conversation : conversations) {
+				if (conversation.getMode() == Conversation.MODE_SINGLE && conversation.getAccount() == account && startCatchup > conversation.getLastMessageTransmitted()) {
+					this.query(conversation,startCatchup);
+				}
+			}
+		}
+		final Query query = new Query(account, startCatchup, endCatchup);
+		this.queries.add(query);
+		this.execute(query);
+	}
+
+	private long getLastMessageTransmitted(final Account account) {
+		long timestamp = 0;
+		for(final Conversation conversation : mXmppConnectionService.getConversations()) {
+			if (conversation.getAccount() == account) {
+				long tmp = conversation.getLastMessageTransmitted();
+				if (tmp > timestamp) {
+					timestamp = tmp;
+				}
+			}
+		}
+		return timestamp;
+	}
+
+	public Query query(final Conversation conversation) {
+		return query(conversation,conversation.getAccount().getXmppConnection().getLastSessionEstablished());
+	}
+
+	public Query query(final Conversation conversation, long end) {
+		return this.query(conversation,conversation.getLastMessageTransmitted(),end);
+	}
+
+	public Query query(Conversation conversation, long start, long end) {
+		synchronized (this.queries) {
+			if (start > end) {
+				return null;
+			}
+			final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
+			this.queries.add(query);
+			this.execute(query);
+			return query;
+		}
+	}
+
+	public void executePendingQueries(final Account account) {
+		List<Query> pending = new ArrayList<>();
+		synchronized(this.pendingQueries) {
+			for(Iterator<Query> iterator = this.pendingQueries.iterator(); iterator.hasNext();) {
+				Query query = iterator.next();
+				if (query.getAccount() == account) {
+					pending.add(query);
+					iterator.remove();
+				}
+			}
+		}
+		for(Query query : pending) {
+			this.execute(query);
+		}
+	}
+
+	private void execute(final Query query) {
+		final Account account=  query.getAccount();
+		if (account.getStatus() == Account.State.ONLINE) {
+			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": running mam query " + query.toString());
+			IqPacket packet = this.mXmppConnectionService.getIqGenerator().queryMessageArchiveManagement(query);
+			this.mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE_ERROR) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
+						finalizeQuery(query);
+					}
+				}
+			});
+		} else {
+			synchronized (this.pendingQueries) {
+				this.pendingQueries.add(query);
+			}
+		}
+	}
+
+	private void finalizeQuery(Query query) {
+		synchronized (this.queries) {
+			this.queries.remove(query);
+		}
+		final Conversation conversation = query.getConversation();
+		if (conversation != null) {
+			conversation.sort();
+			if (conversation.setLastMessageTransmitted(query.getEnd())) {
+				this.mXmppConnectionService.databaseBackend.updateConversation(conversation);
+			}
+			conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
+			if (query.hasCallback()) {
+				query.callback();
+			} else {
+				this.mXmppConnectionService.updateConversationUi();
+			}
+		} else {
+			for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
+				if (tmp.getAccount() == query.getAccount()) {
+					tmp.sort();
+					if (tmp.setLastMessageTransmitted(query.getEnd())) {
+						this.mXmppConnectionService.databaseBackend.updateConversation(tmp);
+					}
+				}
+			}
+		}
+	}
+
+	public boolean queryInProgress(Conversation conversation, XmppConnectionService.OnMoreMessagesLoaded callback) {
+		synchronized (this.queries) {
+			for(Query query : queries) {
+				if (query.conversation == conversation) {
+					if (!query.hasCallback() && callback != null) {
+						query.setCallback(callback);
+					}
+					return true;
+				}
+			}
+			return false;
+		}
+	}
+
+	public void processFin(Element fin) {
+		if (fin == null) {
+			return;
+		}
+		Query query = findQuery(fin.getAttribute("queryid"));
+		if (query == null) {
+			return;
+		}
+		boolean complete = fin.getAttributeAsBoolean("complete");
+		Element set = fin.findChild("set","http://jabber.org/protocol/rsm");
+		Element last = set == null ? null : set.findChild("last");
+		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 (complete || relevant == null || abort) {
+			this.finalizeQuery(query);
+			Log.d(Config.LOGTAG,query.getAccount().getJid().toBareJid().toString()+": finished mam after "+query.getTotalCount()+" messages");
+		} else {
+			final Query nextQuery;
+			if (query.getPagingOrder() == PagingOrder.NORMAL) {
+				nextQuery = query.next(last == null ? null : last.getContent());
+			} else {
+				nextQuery = query.prev(first == null ? null : first.getContent());
+			}
+			this.execute(nextQuery);
+			this.finalizeQuery(query);
+			synchronized (this.queries) {
+				this.queries.remove(query);
+				this.queries.add(nextQuery);
+			}
+		}
+	}
+
+	public Query findQuery(String id) {
+		if (id == null) {
+			return null;
+		}
+		synchronized (this.queries) {
+			for(Query query : this.queries) {
+				if (query.getQueryId().equals(id)) {
+					return query;
+				}
+			}
+			return null;
+		}
+	}
+
+	@Override
+	public void onAdvancedStreamFeaturesAvailable(Account account) {
+		if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().mam()) {
+			this.catchup(account);
+		}
+	}
+
+	public class Query {
+		private int totalCount = 0;
+		private int messageCount = 0;
+		private long start;
+		private long end;
+		private Jid with = null;
+		private String queryId;
+		private String reference = null;
+		private Account account;
+		private Conversation conversation;
+		private PagingOrder pagingOrder = PagingOrder.NORMAL;
+		private XmppConnectionService.OnMoreMessagesLoaded callback = null;
+
+
+		public Query(Conversation conversation, long start, long end) {
+			this(conversation.getAccount(), start, end);
+			this.conversation = conversation;
+			this.with = conversation.getJid().toBareJid();
+		}
+
+		public Query(Conversation conversation, long start, long end, PagingOrder order) {
+			this(conversation,start,end);
+			this.pagingOrder = order;
+		}
+
+		public Query(Account account, long start, long end) {
+			this.account = account;
+			this.start = start;
+			this.end = end;
+			this.queryId = new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
+		}
+
+		private Query page(String reference) {
+			Query query = new Query(this.account,this.start,this.end);
+			query.reference = reference;
+			query.conversation = conversation;
+			query.with = with;
+			query.totalCount = totalCount;
+			query.callback = callback;
+			return query;
+		}
+
+		public Query next(String reference) {
+			Query query = page(reference);
+			query.pagingOrder = PagingOrder.NORMAL;
+			return query;
+		}
+
+		public Query prev(String reference) {
+			Query query = page(reference);
+			query.pagingOrder = PagingOrder.REVERSE;
+			return query;
+		}
+
+		public String getReference() {
+			return reference;
+		}
+
+		public PagingOrder getPagingOrder() {
+			return this.pagingOrder;
+		}
+
+		public String getQueryId() {
+			return queryId;
+		}
+
+		public Jid getWith() {
+			return with;
+		}
+
+		public long getStart() {
+			return start;
+		}
+
+		public void setCallback(XmppConnectionService.OnMoreMessagesLoaded callback) {
+			this.callback = callback;
+		}
+
+		public void callback() {
+			if (this.callback != null) {
+				this.callback.onMoreMessagesLoaded(messageCount,conversation);
+				if (messageCount == 0) {
+					this.callback.informUser(R.string.no_more_history_on_server);
+				}
+			}
+		}
+
+		public long getEnd() {
+			return end;
+		}
+
+		public Conversation getConversation() {
+			return conversation;
+		}
+
+		public Account getAccount() {
+			return this.account;
+		}
+
+		public void incrementTotalCount() {
+			this.totalCount++;
+		}
+
+		public void incrementMessageCount() {
+			this.messageCount++;
+		}
+
+		public int getTotalCount() {
+			return this.totalCount;
+		}
+
+		public int getMessageCount() {
+			return this.messageCount;
+		}
+
+		@Override
+		public String toString() {
+			StringBuilder builder = new StringBuilder();
+			builder.append("with=");
+			if (this.with==null) {
+				builder.append("*");
+			} else {
+				builder.append(with.toString());
+			}
+			builder.append(", start=");
+			builder.append(AbstractGenerator.getTimestamp(this.start));
+			builder.append(", end=");
+			builder.append(AbstractGenerator.getTimestamp(this.end));
+			if (this.reference!=null) {
+				if (this.pagingOrder == PagingOrder.NORMAL) {
+					builder.append(", after=");
+				} else {
+					builder.append(", before=");
+				}
+				builder.append(this.reference);
+			}
+			return builder.toString();
+		}
+
+		public boolean hasCallback() {
+			return this.callback != null;
+		}
+	}
+}