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 queries = new HashSet(); private final ArrayList pendingQueries = new ArrayList(); 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 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 pending = new ArrayList<>(); synchronized(this.pendingQueries) { for(Iterator 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.RESULT) { 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, 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 (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 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 incrementTotalCount() { this.totalCount++; } public void incrementMessageCount() { this.messageCount++; } 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="+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; } } }