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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;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
public class MessageParser extends AbstractParser implements
OnMessagePacketReceived {
private long lastCarbonMessageReceived = -XmppConnectionService.CARBON_GRACE_PERIOD;
public MessageParser(XmppConnectionService service) {
super(service);
}
private Message parseChat(MessagePacket packet, Account account) {
String[] fromParts = packet.getFrom().split("/");
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], false);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
updateLastseen(packet, account, true);
String pgpBody = getPgpBody(packet);
Message finishedMessage;
if (pgpBody != null) {
finishedMessage = new Message(conversation, packet.getFrom(),
pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
} else {
finishedMessage = new Message(conversation, packet.getFrom(),
packet.getBody(), Message.ENCRYPTION_NONE,
Message.STATUS_RECIEVED);
}
finishedMessage.setTime(getTimestamp(packet));
return finishedMessage;
}
private Message parseOtrChat(MessagePacket packet, Account account) {
boolean properlyAddressed = (packet.getTo().split("/").length == 2)
|| (account.countPresences() == 1);
String[] fromParts = packet.getFrom().split("/");
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], false);
updateLastseen(packet, account, true);
String body = packet.getBody();
if (!conversation.hasValidOtrSession()) {
if (properlyAddressed) {
conversation.startOtrSession(
mXmppConnectionService.getApplicationContext(),
fromParts[1], false);
} else {
return null;
}
} else {
String foreignPresence = conversation.getOtrSession()
.getSessionID().getUserID();
if (!foreignPresence.equals(fromParts[1])) {
conversation.endOtrIfNeeded();
if (properlyAddressed) {
conversation.startOtrSession(
mXmppConnectionService.getApplicationContext(),
fromParts[1], false);
} else {
return null;
}
}
}
try {
Session otrSession = conversation.getOtrSession();
SessionStatus before = otrSession.getSessionStatus();
body = otrSession.transformReceiving(body);
SessionStatus after = otrSession.getSessionStatus();
if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
mXmppConnectionService.onOtrSessionEstablished(conversation);
} else if ((before != after) && (after == SessionStatus.FINISHED)) {
conversation.resetOtrSession();
}
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,
Message.STATUS_RECIEVED);
finishedMessage.setTime(getTimestamp(packet));
return finishedMessage;
} catch (Exception e) {
String receivedId = packet.getId();
if (receivedId != null) {
mXmppConnectionService.replyWithNotAcceptable(account, packet);
}
conversation.endOtrIfNeeded();
return null;
}
}
private Message parseGroupchat(MessagePacket packet, Account account) {
int status;
String[] fromParts = packet.getFrom().split("/");
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, fromParts[0], true);
if (packet.hasChild("subject")) {
conversation.getMucOptions().setSubject(
packet.findChild("subject").getContent());
mXmppConnectionService.updateUi(conversation, false);
return null;
}
if ((fromParts.length == 1)) {
return null;
}
String counterPart = fromParts[1];
if (counterPart.equals(conversation.getMucOptions().getNick())) {
if (mXmppConnectionService.markMessage(conversation,
packet.getId(), Message.STATUS_SEND)) {
return null;
} else {
status = Message.STATUS_SEND;
}
} else {
status = Message.STATUS_RECIEVED;
}
String pgpBody = getPgpBody(packet);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
Message finishedMessage;
if (pgpBody == null) {
finishedMessage = new Message(conversation, counterPart,
packet.getBody(), Message.ENCRYPTION_NONE, status);
} else {
finishedMessage = new Message(conversation, counterPart, pgpBody,
Message.ENCRYPTION_PGP, status);
}
finishedMessage.setTime(getTimestamp(packet));
return finishedMessage;
}
private Message parseCarbonMessage(MessagePacket packet, Account account) {
int status;
String fullJid;
Element forwarded;
if (packet.hasChild("received")) {
forwarded = packet.findChild("received").findChild("forwarded");
status = Message.STATUS_RECIEVED;
} else if (packet.hasChild("sent")) {
forwarded = packet.findChild("sent").findChild("forwarded");
status = Message.STATUS_SEND;
} else {
return null;
}
if (forwarded == null) {
return null;
}
Element message = forwarded.findChild("message");
if ((message == null) || (!message.hasChild("body"))) {
if (status == Message.STATUS_RECIEVED) {
parseNormal(message, account);
}
return null;
}
if (status == Message.STATUS_RECIEVED) {
fullJid = message.getAttribute("from");
updateLastseen(message, account, true);
} else {
fullJid = message.getAttribute("to");
}
String[] parts = fullJid.split("/");
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account, parts[0], false);
conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
String pgpBody = getPgpBody(message);
Message finishedMessage;
if (pgpBody != null) {
finishedMessage = new Message(conversation, fullJid, pgpBody,
Message.ENCRYPTION_PGP, status);
} else {
String body = message.findChild("body").getContent();
finishedMessage = new Message(conversation, fullJid, body,
Message.ENCRYPTION_NONE, status);
}
finishedMessage.setTime(getTimestamp(message));
return finishedMessage;
}
private void parseError(MessagePacket packet, Account account) {
String[] fromParts = packet.getFrom().split("/");
mXmppConnectionService.markMessage(account, fromParts[0],
packet.getId(), Message.STATUS_SEND_FAILED);
}
private void parseNormal(Element packet, Account account) {
if (packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
String id = packet
.findChild("displayed", "urn:xmpp:chat-markers:0")
.getAttribute("id");
String[] fromParts = packet.getAttribute("from").split("/");
updateLastseen(packet, account, true);
mXmppConnectionService.markMessage(account, fromParts[0], id,
Message.STATUS_SEND_DISPLAYED);
} else if (packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
.getAttribute("id");
String[] fromParts = packet.getAttribute("from").split("/");
updateLastseen(packet, account, false);
mXmppConnectionService.markMessage(account, fromParts[0], id,
Message.STATUS_SEND_RECEIVED);
} else if (packet.hasChild("x")) {
Element x = packet.findChild("x");
if (x.hasChild("invite")) {
Conversation conversation = mXmppConnectionService
.findOrCreateConversation(account,
packet.getAttribute("from"), true);
mXmppConnectionService.updateUi(conversation, false);
}
}
}
private String getPgpBody(Element message) {
Element child = message.findChild("x", "jabber:x:encrypted");
if (child == null) {
return null;
} else {
return child.getContent();
}
}
private String getMarkableMessageId(Element message) {
if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) {
return message.getAttribute("id");
} else {
return null;
}
}
@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)) {
notify = (SystemClock.elapsedRealtime() - lastCarbonMessageReceived) > XmppConnectionService.CARBON_GRACE_PERIOD;
}
if ((packet.getType() == MessagePacket.TYPE_CHAT)) {
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);
message.markUnread();
} else if (packet.hasChild("received") || (packet.hasChild("sent"))) {
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 if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
message = this.parseGroupchat(packet, account);
if (message != null) {
if (message.getStatus() == Message.STATUS_RECIEVED) {
message.markUnread();
} else {
message.getConversation().markRead();
notify = false;
}
}
} else if (packet.getType() == MessagePacket.TYPE_ERROR) {
this.parseError(packet, account);
return;
} else if (packet.getType() == MessagePacket.TYPE_NORMAL) {
this.parseNormal(packet, account);
}
if ((message == null) || (message.getBody() == null)) {
return;
}
if ((mXmppConnectionService.confirmMessages())
&& ((packet.getId() != null))) {
MessagePacket receivedPacket = new MessagePacket();
receivedPacket.setType(MessagePacket.TYPE_NORMAL);
receivedPacket.setTo(message.getCounterpart());
receivedPacket.setFrom(account.getFullJid());
if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
Element received = receivedPacket.addChild("received",
"urn:xmpp:chat-markers:0");
received.setAttribute("id", packet.getId());
account.getXmppConnection().sendMessagePacket(receivedPacket);
} else if (packet.hasChild("request", "urn:xmpp:receipts")) {
Element received = receivedPacket.addChild("received",
"urn:xmpp:receipts");
received.setAttribute("id", packet.getId());
account.getXmppConnection().sendMessagePacket(receivedPacket);
}
}
Conversation conversation = message.getConversation();
conversation.getMessages().add(message);
if (packet.getType() != MessagePacket.TYPE_ERROR) {
mXmppConnectionService.databaseBackend.createMessage(message);
}
mXmppConnectionService.updateUi(conversation, notify);
}
}
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