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diff --git a/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
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+++ b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
@@ -0,0 +1,420 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.util.Pair;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.generator.AbstractGenerator;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnAdvancedStreamFeaturesLoaded;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
+
+ private final XmppConnectionService mXmppConnectionService;
+
+ private final HashSet<Query> queries = new HashSet<>();
+ private final ArrayList<Query> pendingQueries = new ArrayList<>();
+
+ public enum PagingOrder {
+ NORMAL,
+ REVERSE
+ };
+
+ public MessageArchiveService(final XmppConnectionService service) {
+ this.mXmppConnectionService = service;
+ }
+
+ private void catchup(final Account account) {
+ synchronized (this.queries) {
+ for(Iterator<Query> iterator = this.queries.iterator(); iterator.hasNext();) {
+ Query query = iterator.next();
+ if (query.getAccount() == account) {
+ iterator.remove();
+ }
+ }
+ }
+ 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);
+ }
+
+ public void catchupMUC(final Conversation conversation) {
+ if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
+ query(conversation,
+ 0,
+ System.currentTimeMillis());
+ } else {
+ query(conversation,
+ conversation.getLastMessageTransmitted(),
+ System.currentTimeMillis());
+ }
+ }
+
+ private long getLastMessageTransmitted(final Account account) {
+ Pair<Long,String> pair = mXmppConnectionService.databaseBackend.getLastMessageReceived(account);
+ return pair == null ? 0 : pair.first;
+ }
+
+ public Query query(final Conversation conversation) {
+ if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
+ return query(conversation,
+ 0,
+ System.currentTimeMillis());
+ } else {
+ return query(conversation,
+ conversation.getLastMessageTransmitted(),
+ 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) {
+ return this.query(conversation, start, end, null);
+ }
+
+ public Query query(Conversation conversation, long start, long end, XmppConnectionService.OnMoreMessagesLoaded callback) {
+ synchronized (this.queries) {
+ if (start > end) {
+ return null;
+ }
+ final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
+ query.reference = conversation.getFirstMamReference();
+ this.queries.add(query);
+ if (null != callback) {
+ query.setCallback(callback);
+ }
+ 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) {
+ Logging.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.TIMEOUT) {
+ synchronized (MessageArchiveService.this.queries) {
+ MessageArchiveService.this.queries.remove(query);
+ if (query.hasCallback()) {
+ query.callback();
+ }
+ }
+ } else if (packet.getType() != IqPacket.TYPE.RESULT) {
+ Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
+ finalizeQuery(query, true);
+ }
+ }
+ });
+ } else {
+ synchronized (this.pendingQueries) {
+ this.pendingQueries.add(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(!done);
+ } else {
+ for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
+ if (tmp.getAccount() == query.getAccount()) {
+ tmp.sort();
+ }
+ }
+ }
+ if (query.hasCallback()) {
+ query.callback();
+ } else {
+ if (null != conversation) {
+ conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
+ }
+ this.mXmppConnectionService.updateConversationUi();
+ }
+ }
+
+ 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 boolean queryInProgress(Conversation conversation) {
+ return queryInProgress(conversation, null);
+ }
+
+ public void processFin(Element fin, Jid from) {
+ if (fin == null) {
+ return;
+ }
+ Query query = findQuery(fin.getAttribute("queryid"));
+ if (query == null || !query.validFrom(from)) {
+ 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 (query.getConversation() != null) {
+ query.getConversation().setFirstMamReference(first == null ? null : first.getContent());
+ }
+ if (complete || relevant == null || abort) {
+ final boolean done = (complete || query.getMessageCount() == 0) && query.getStart() == 0;
+ this.finalizeQuery(query, done);
+ Logging.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);
+ }
+ } 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, false);
+ synchronized (this.queries) {
+ 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 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;
+ }
+
+ 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.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 conversation == null ? null : conversation.getJid().toBareJid();
+ }
+
+ public boolean muc() {
+ return conversation != null && conversation.getMode() == Conversation.MODE_MULTI;
+ }
+
+ 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 incrementMessageCount() {
+ this.messageCount++;
+ this.totalCount++;
+ }
+
+ public int getTotalCount() {
+ return this.totalCount;
+ }
+
+ public int getMessageCount() {
+ return this.messageCount;
+ }
+
+ public boolean validFrom(Jid from) {
+ if (muc()) {
+ return getWith().equals(from);
+ } else {
+ return (from == null) || account.getJid().toBareJid().equals(from.toBareJid());
+ }
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder builder = new StringBuilder();
+ if (this.muc()) {
+ builder.append("to=");
+ builder.append(this.getWith().toString());
+ } else {
+ builder.append("with=");
+ if (this.getWith() == null) {
+ builder.append("*");
+ } else {
+ builder.append(getWith().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;
+ }
+ }
+}