conversations-classic/src/eu/siacs/conversations/parser/MessageParser.java

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package eu.siacs.conversations.parser;
import android.os.SystemClock;
import net.java.otr4j.session.Session;
import net.java.otr4j.session.SessionStatus;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.entities.Account;
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import eu.siacs.conversations.entities.Contact;
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import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.CryptoHelper;
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import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
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import eu.siacs.conversations.xmpp.pep.Avatar;
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import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
public class MessageParser extends AbstractParser implements
OnMessagePacketReceived {
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private long lastCarbonMessageReceived = -(Config.CARBON_GRACE_PERIOD * 1000);
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public MessageParser(XmppConnectionService service) {
super(service);
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}
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private Message parseChat(MessagePacket packet, Account account) {
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String[] fromParts = packet.getFrom().split("/", 2);
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Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], false);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
updateLastseen(packet, account, true);
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String pgpBody = getPgpBody(packet);
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Message finishedMessage;
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if (pgpBody != null) {
finishedMessage = new Message(conversation, packet.getFrom(),
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pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
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} else {
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finishedMessage = new Message(conversation, packet.getFrom(),
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packet.getBody(), Message.ENCRYPTION_NONE,
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Message.STATUS_RECEIVED);
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}
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finishedMessage.setRemoteMsgId(packet.getId());
if (conversation.getMode() == Conversation.MODE_MULTI
&& fromParts.length >= 2) {
finishedMessage.setType(Message.TYPE_PRIVATE);
finishedMessage.setPresence(fromParts[1]);
finishedMessage.setTrueCounterpart(conversation.getMucOptions()
.getTrueCounterpart(fromParts[1]));
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if (conversation.hasDuplicateMessage(finishedMessage)) {
return null;
}
}
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finishedMessage.setTime(getTimestamp(packet));
return finishedMessage;
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}
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private Message parseOtrChat(MessagePacket packet, Account account) {
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boolean properlyAddressed = (packet.getTo().split("/", 2).length == 2)
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|| (account.countPresences() == 1);
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String[] fromParts = packet.getFrom().split("/", 2);
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Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], false);
String presence;
if (fromParts.length >= 2) {
presence = fromParts[1];
} else {
presence = "";
}
updateLastseen(packet, account, true);
String body = packet.getBody();
if (body.matches("^\\?OTRv\\d*\\?")) {
conversation.resetOtrSession();
}
if (!conversation.hasValidOtrSession()) {
if (properlyAddressed) {
conversation.startOtrSession(mXmppConnectionService, presence,
false);
} else {
return null;
}
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} else {
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String foreignPresence = conversation.getOtrSession()
.getSessionID().getUserID();
if (!foreignPresence.equals(presence)) {
conversation.endOtrIfNeeded();
if (properlyAddressed) {
conversation.startOtrSession(mXmppConnectionService,
presence, false);
} else {
return null;
}
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}
}
try {
Session otrSession = conversation.getOtrSession();
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SessionStatus before = otrSession.getSessionStatus();
body = otrSession.transformReceiving(body);
SessionStatus after = otrSession.getSessionStatus();
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if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
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mXmppConnectionService.onOtrSessionEstablished(conversation);
} else if ((before != after) && (after == SessionStatus.FINISHED)) {
conversation.resetOtrSession();
mXmppConnectionService.updateConversationUi();
}
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if ((body == null) || (body.isEmpty())) {
return null;
}
if (body.startsWith(CryptoHelper.FILETRANSFER)) {
String key = body.substring(CryptoHelper.FILETRANSFER.length());
conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
return null;
}
conversation
.setLatestMarkableMessageId(getMarkableMessageId(packet));
Message finishedMessage = new Message(conversation,
packet.getFrom(), body, Message.ENCRYPTION_OTR,
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Message.STATUS_RECEIVED);
finishedMessage.setTime(getTimestamp(packet));
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finishedMessage.setRemoteMsgId(packet.getId());
return finishedMessage;
} catch (Exception e) {
String receivedId = packet.getId();
if (receivedId != null) {
mXmppConnectionService.replyWithNotAcceptable(account, packet);
}
conversation.resetOtrSession();
return null;
}
}
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private Message parseGroupchat(MessagePacket packet, Account account) {
int status;
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String[] fromParts = packet.getFrom().split("/", 2);
if (mXmppConnectionService.find(account.pendingConferenceLeaves,
account, fromParts[0]) != null) {
return null;
}
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Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], true);
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if (packet.hasChild("subject")) {
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conversation.getMucOptions().setSubject(
packet.findChild("subject").getContent());
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mXmppConnectionService.updateConversationUi();
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return null;
}
if ((fromParts.length == 1)) {
return null;
}
String counterPart = fromParts[1];
if (counterPart.equals(conversation.getMucOptions().getActualNick())) {
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if (mXmppConnectionService.markMessage(conversation,
packet.getId(), Message.STATUS_SEND)) {
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return null;
} else {
status = Message.STATUS_SEND;
}
} else {
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status = Message.STATUS_RECEIVED;
}
String pgpBody = getPgpBody(packet);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
Message finishedMessage;
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if (pgpBody == null) {
finishedMessage = new Message(conversation, counterPart,
packet.getBody(), Message.ENCRYPTION_NONE, status);
} else {
finishedMessage = new Message(conversation, counterPart, pgpBody,
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Message.ENCRYPTION_PGP, status);
}
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finishedMessage.setRemoteMsgId(packet.getId());
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if (status == Message.STATUS_RECEIVED) {
finishedMessage.setTrueCounterpart(conversation.getMucOptions()
.getTrueCounterpart(counterPart));
}
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if (packet.hasChild("delay")
&& conversation.hasDuplicateMessage(finishedMessage)) {
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return null;
}
finishedMessage.setTime(getTimestamp(packet));
return finishedMessage;
}
private Message parseCarbonMessage(MessagePacket packet, Account account) {
int status;
String fullJid;
Element forwarded;
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if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
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.findChild("forwarded", "urn:xmpp:forward:0");
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status = Message.STATUS_RECEIVED;
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} else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
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.findChild("forwarded", "urn:xmpp:forward:0");
status = Message.STATUS_SEND;
} else {
return null;
}
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if (forwarded == null) {
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return null;
}
Element message = forwarded.findChild("message");
if ((message == null) || (!message.hasChild("body"))) {
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if (status == Message.STATUS_RECEIVED
&& message.getAttribute("from") != null) {
parseNonMessage(message, account);
}
return null;
}
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if (status == Message.STATUS_RECEIVED) {
fullJid = message.getAttribute("from");
if (fullJid == null) {
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return null;
} else {
updateLastseen(message, account, true);
}
} else {
fullJid = message.getAttribute("to");
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if (fullJid == null) {
return null;
}
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}
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String[] parts = fullJid.split("/", 2);
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Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, parts[0], false);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
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String pgpBody = getPgpBody(message);
Message finishedMessage;
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if (pgpBody != null) {
finishedMessage = new Message(conversation, fullJid, pgpBody,
Message.ENCRYPTION_PGP, status);
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} else {
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String body = message.findChild("body").getContent();
finishedMessage = new Message(conversation, fullJid, body,
Message.ENCRYPTION_NONE, status);
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}
finishedMessage.setTime(getTimestamp(message));
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finishedMessage.setRemoteMsgId(message.getAttribute("id"));
if (conversation.getMode() == Conversation.MODE_MULTI
&& parts.length >= 2) {
finishedMessage.setType(Message.TYPE_PRIVATE);
finishedMessage.setPresence(parts[1]);
finishedMessage.setTrueCounterpart(conversation.getMucOptions()
.getTrueCounterpart(parts[1]));
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if (conversation.hasDuplicateMessage(finishedMessage)) {
return null;
}
}
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return finishedMessage;
}
private void parseError(MessagePacket packet, Account account) {
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String[] fromParts = packet.getFrom().split("/", 2);
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mXmppConnectionService.markMessage(account, fromParts[0],
packet.getId(), Message.STATUS_SEND_FAILED);
}
private void parseNonMessage(Element packet, Account account) {
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String from = packet.getAttribute("from");
if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
Element event = packet.findChild("event",
"http://jabber.org/protocol/pubsub#event");
parseEvent(event, packet.getAttribute("from"), account);
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} else if (from != null
&& packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
String id = packet
.findChild("displayed", "urn:xmpp:chat-markers:0")
.getAttribute("id");
updateLastseen(packet, account, true);
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mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
id, Message.STATUS_SEND_DISPLAYED);
} else if (from != null
&& packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
.getAttribute("id");
updateLastseen(packet, account, false);
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mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
id, Message.STATUS_SEND_RECEIVED);
} else if (from != null
&& packet.hasChild("received", "urn:xmpp:receipts")) {
String id = packet.findChild("received", "urn:xmpp:receipts")
.getAttribute("id");
updateLastseen(packet, account, false);
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mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
id, Message.STATUS_SEND_RECEIVED);
} else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
Element x = packet.findChild("x",
"http://jabber.org/protocol/muc#user");
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if (x.hasChild("invite")) {
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account,
packet.getAttribute("from"), true);
if (!conversation.getMucOptions().online()) {
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if (x.hasChild("password")) {
Element password = x.findChild("password");
conversation.getMucOptions().setPassword(
password.getContent());
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}
mXmppConnectionService.joinMuc(conversation);
mXmppConnectionService.updateConversationUi();
}
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}
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} else if (packet.hasChild("x", "jabber:x:conference")) {
Element x = packet.findChild("x", "jabber:x:conference");
String jid = x.getAttribute("jid");
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String password = x.getAttribute("password");
if (jid != null) {
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Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, jid, true);
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if (!conversation.getMucOptions().online()) {
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if (password != null) {
conversation.getMucOptions().setPassword(password);
}
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mXmppConnectionService.joinMuc(conversation);
mXmppConnectionService.updateConversationUi();
}
}
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}
}
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private void parseEvent(Element event, String from, Account account) {
Element items = event.findChild("items");
String node = items.getAttribute("node");
if (node != null) {
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if (node.equals("urn:xmpp:avatar:metadata")) {
Avatar avatar = Avatar.parseMetadata(items);
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if (avatar != null) {
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avatar.owner = from;
if (mXmppConnectionService.getFileBackend().isAvatarCached(
avatar)) {
if (account.getJid().equals(from)) {
if (account.setAvatar(avatar.getFilename())) {
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mXmppConnectionService.databaseBackend
.updateAccount(account);
}
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} else {
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Contact contact = account.getRoster().getContact(
from);
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contact.setAvatar(avatar.getFilename());
}
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} else {
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mXmppConnectionService.fetchAvatar(account, avatar);
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}
}
} else if (node.equals("http://jabber.org/protocol/nick")) {
Element item = items.findChild("item");
if (item != null) {
Element nick = item.findChild("nick",
"http://jabber.org/protocol/nick");
if (nick != null) {
if (from != null) {
Contact contact = account.getRoster().getContact(
from);
contact.setPresenceName(nick.getContent());
}
}
}
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}
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}
}
private String getPgpBody(Element message) {
Element child = message.findChild("x", "jabber:x:encrypted");
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if (child == null) {
return null;
} else {
return child.getContent();
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}
}
private String getMarkableMessageId(Element message) {
if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) {
return message.getAttribute("id");
} else {
return null;
}
}
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@Override
public void onMessagePacketReceived(Account account, MessagePacket packet) {
Message message = null;
boolean notify = true;
if (mXmppConnectionService.getPreferences().getBoolean(
"notification_grace_period_after_carbon_received", true)) {
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notify = (SystemClock.elapsedRealtime() - lastCarbonMessageReceived) > (Config.CARBON_GRACE_PERIOD * 1000);
}
this.parseNick(packet, account);
if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
if ((packet.getBody() != null)
&& (packet.getBody().startsWith("?OTR"))) {
message = this.parseOtrChat(packet, account);
if (message != null) {
message.markUnread();
}
} else if (packet.hasChild("body")) {
message = this.parseChat(packet, account);
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if (message != null) {
message.markUnread();
}
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} else if (packet.hasChild("received", "urn:xmpp:carbons:2")
|| (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
message = this.parseCarbonMessage(packet, account);
if (message != null) {
if (message.getStatus() == Message.STATUS_SEND) {
lastCarbonMessageReceived = SystemClock
.elapsedRealtime();
notify = false;
message.getConversation().markRead();
} else {
message.markUnread();
}
}
} else {
parseNonMessage(packet, account);
}
} else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
message = this.parseGroupchat(packet, account);
if (message != null) {
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if (message.getStatus() == Message.STATUS_RECEIVED) {
message.markUnread();
} else {
message.getConversation().markRead();
lastCarbonMessageReceived = SystemClock.elapsedRealtime();
notify = false;
}
}
} else if (packet.getType() == MessagePacket.TYPE_ERROR) {
this.parseError(packet, account);
return;
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} else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
this.parseHeadline(packet, account);
return;
}
if ((message == null) || (message.getBody() == null)) {
return;
}
if ((mXmppConnectionService.confirmMessages())
&& ((packet.getId() != null))) {
if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
MessagePacket receipt = mXmppConnectionService
.getMessageGenerator().received(account, packet,
"urn:xmpp:chat-markers:0");
mXmppConnectionService.sendMessagePacket(account, receipt);
}
if (packet.hasChild("request", "urn:xmpp:receipts")) {
MessagePacket receipt = mXmppConnectionService
.getMessageGenerator().received(account, packet,
"urn:xmpp:receipts");
mXmppConnectionService.sendMessagePacket(account, receipt);
}
}
Conversation conversation = message.getConversation();
conversation.getMessages().add(message);
if (packet.getType() != MessagePacket.TYPE_ERROR) {
if (message.getEncryption() == Message.ENCRYPTION_NONE
|| mXmppConnectionService.saveEncryptedMessages()) {
mXmppConnectionService.databaseBackend.createMessage(message);
}
}
notify = notify && !conversation.isMuted();
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mXmppConnectionService.notifyUi(conversation, notify);
}
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private void parseHeadline(MessagePacket packet, Account account) {
if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
Element event = packet.findChild("event",
"http://jabber.org/protocol/pubsub#event");
parseEvent(event, packet.getFrom(), account);
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}
}
private void parseNick(MessagePacket packet, Account account) {
Element nick = packet.findChild("nick",
"http://jabber.org/protocol/nick");
if (nick != null) {
if (packet.getFrom() != null) {
Contact contact = account.getRoster().getContact(
packet.getFrom());
contact.setPresenceName(nick.getContent());
}
}
}
}