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package eu.siacs.conversations.generator;
import net.java.otr4j.OtrException;
import net.java.otr4j.session.Session;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.jid.Jid;
import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
public class MessageGenerator extends AbstractGenerator {
public static final String OTR_FALLBACK_MESSAGE = "I would like to start a private (OTR encrypted) conversation but your client doesn’t seem to support that";
private static final String OMEMO_FALLBACK_MESSAGE = "I sent you an OMEMO encrypted message but your client doesn’t seem to support that. Find more information on https://conversations.im/omemo";
private static final String PGP_FALLBACK_MESSAGE = "I sent you a PGP encrypted message but your client doesn’t seem to support that.";
public MessageGenerator(XmppConnectionService service) {
super(service);
}
private MessagePacket preparePacket(Message message) {
Conversation conversation = message.getConversation();
Account account = conversation.getAccount();
MessagePacket packet = new MessagePacket();
if (conversation.getMode() == Conversation.MODE_SINGLE) {
packet.setTo(message.getCounterpart());
packet.setType(MessagePacket.TYPE_CHAT);
packet.addChild("markable", "urn:xmpp:chat-markers:0");
if (this.mXmppConnectionService.indicateReceived()) {
packet.addChild("request", "urn:xmpp:receipts");
}
} else if (message.getType() == Message.TYPE_PRIVATE) {
packet.setTo(message.getCounterpart());
packet.setType(MessagePacket.TYPE_CHAT);
if (this.mXmppConnectionService.indicateReceived()) {
packet.addChild("request", "urn:xmpp:receipts");
}
} else {
packet.setTo(message.getCounterpart().toBareJid());
packet.setType(MessagePacket.TYPE_GROUPCHAT);
}
packet.setFrom(account.getJid());
packet.setId(message.getUuid());
if (message.edited()) {
packet.addChild("replace","urn:xmpp:message-correct:0").setAttribute("id",message.getEditedId());
}
return packet;
}
public void addDelay(MessagePacket packet, long timestamp) {
final SimpleDateFormat mDateFormat = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
Element delay = packet.addChild("delay", "urn:xmpp:delay");
Date date = new Date(timestamp);
delay.setAttribute("stamp", mDateFormat.format(date));
}
public MessagePacket generateAxolotlChat(Message message, XmppAxolotlMessage axolotlMessage) {
MessagePacket packet = preparePacket(message);
if (axolotlMessage == null) {
return null;
}
packet.setAxolotlMessage(axolotlMessage.toElement());
if (Config.supportUnencrypted() && !recipientSupportsOmemo(message)) {
packet.setBody(OMEMO_FALLBACK_MESSAGE);
}
packet.addChild("store", "urn:xmpp:hints");
return packet;
}
private static boolean recipientSupportsOmemo(Message message) {
Contact c = message.getContact();
return c != null && c.getPresences().allOrNonSupport(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
}
public static void addMessageHints(MessagePacket packet) {
packet.addChild("private", "urn:xmpp:carbons:2");
packet.addChild("no-copy", "urn:xmpp:hints");
packet.addChild("no-permanent-store", "urn:xmpp:hints");
packet.addChild("no-permanent-storage", "urn:xmpp:hints"); //do not copy this. this is wrong. it is *store*
}
public MessagePacket generateOtrChat(Message message) {
Session otrSession = message.getConversation().getOtrSession();
if (otrSession == null) {
return null;
}
MessagePacket packet = preparePacket(message);
addMessageHints(packet);
try {
String content;
if (message.hasFileOnRemoteHost()) {
content = message.getFileParams().url.toString();
} else {
content = message.getBody();
}
packet.setBody(otrSession.transformSending(content)[0]);
return packet;
} catch (OtrException e) {
return null;
}
}
public MessagePacket generateChat(Message message) {
MessagePacket packet = preparePacket(message);
String content;
if (message.hasFileOnRemoteHost()) {
Message.FileParams fileParams = message.getFileParams();
content = fileParams.url.toString();
packet.addChild("x","jabber:x:oob").addChild("url").setContent(content);
} else {
content = message.getBody();
}
packet.setBody(content);
return packet;
}
public MessagePacket generatePgpChat(Message message) {
MessagePacket packet = preparePacket(message);
if (Config.supportUnencrypted()) {
packet.setBody(PGP_FALLBACK_MESSAGE);
}
if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
packet.addChild("x", "jabber:x:encrypted").setContent(message.getBody());
}
return packet;
}
public MessagePacket generateChatState(Conversation conversation) {
final Account account = conversation.getAccount();
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_CHAT);
packet.setTo(conversation.getJid().toBareJid());
packet.setFrom(account.getJid());
packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
packet.addChild("no-store", "urn:xmpp:hints");
packet.addChild("no-storage", "urn:xmpp:hints"); //wrong! don't copy this. Its *store*
return packet;
}
public MessagePacket confirm(final Account account, final Jid to, final String id) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_CHAT);
packet.setTo(to);
packet.setFrom(account.getJid());
Element received = packet.addChild("displayed","urn:xmpp:chat-markers:0");
received.setAttribute("id", id);
packet.addChild("store", "urn:xmpp:hints");
return packet;
}
public MessagePacket conferenceSubject(Conversation conversation,String subject) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_GROUPCHAT);
packet.setTo(conversation.getJid().toBareJid());
Element subjectChild = new Element("subject");
subjectChild.setContent(subject);
packet.addChild(subjectChild);
packet.setFrom(conversation.getAccount().getJid().toBareJid());
return packet;
}
public MessagePacket directInvite(final Conversation conversation, final Jid contact) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_NORMAL);
packet.setTo(contact);
packet.setFrom(conversation.getAccount().getJid());
Element x = packet.addChild("x", "jabber:x:conference");
x.setAttribute("jid", conversation.getJid().toBareJid().toString());
return packet;
}
public MessagePacket invite(Conversation conversation, Jid contact) {
MessagePacket packet = new MessagePacket();
packet.setTo(conversation.getJid().toBareJid());
packet.setFrom(conversation.getAccount().getJid());
Element x = new Element("x");
x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
Element invite = new Element("invite");
invite.setAttribute("to", contact.toBareJid().toString());
x.addChild(invite);
packet.addChild(x);
return packet;
}
public MessagePacket received(Account account, MessagePacket originalMessage, ArrayList<String> namespaces, int type) {
MessagePacket receivedPacket = new MessagePacket();
receivedPacket.setType(type);
receivedPacket.setTo(originalMessage.getFrom());
receivedPacket.setFrom(account.getJid());
for(String namespace : namespaces) {
receivedPacket.addChild("received", namespace).setAttribute("id", originalMessage.getId());
}
return receivedPacket;
}
public MessagePacket generateOtrError(Jid to, String id, String errorText) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_ERROR);
packet.setAttribute("id",id);
packet.setTo(to);
Element error = packet.addChild("error");
error.setAttribute("code","406");
error.setAttribute("type","modify");
error.addChild("not-acceptable","urn:ietf:params:xml:ns:xmpp-stanzas");
error.addChild("text").setContent("?OTR Error:" + errorText);
return packet;
}
}
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