1package eu.siacs.conversations.generator;
2
3import java.text.SimpleDateFormat;
4import java.util.ArrayList;
5import java.util.Date;
6import java.util.Locale;
7import java.util.TimeZone;
8
9import eu.siacs.conversations.Config;
10import eu.siacs.conversations.crypto.axolotl.AxolotlService;
11import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
12import eu.siacs.conversations.entities.Account;
13import eu.siacs.conversations.entities.Conversation;
14import eu.siacs.conversations.entities.Conversational;
15import eu.siacs.conversations.entities.Message;
16import eu.siacs.conversations.services.XmppConnectionService;
17import eu.siacs.conversations.xml.Element;
18import eu.siacs.conversations.xml.Namespace;
19import eu.siacs.conversations.xmpp.Jid;
20import eu.siacs.conversations.xmpp.chatstate.ChatState;
21import eu.siacs.conversations.xmpp.forms.Data;
22import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
23import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
24import eu.siacs.conversations.xmpp.jingle.Media;
25import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
26import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
27
28public class MessageGenerator extends AbstractGenerator {
29 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";
30 private static final String PGP_FALLBACK_MESSAGE = "I sent you a PGP encrypted message but your client doesn’t seem to support that.";
31
32 public MessageGenerator(XmppConnectionService service) {
33 super(service);
34 }
35
36 private MessagePacket preparePacket(Message message, boolean legacyEncryption) {
37 Conversation conversation = (Conversation) message.getConversation();
38 Account account = conversation.getAccount();
39 MessagePacket packet = new MessagePacket();
40 final boolean isWithSelf = conversation.getContact().isSelf();
41 if (conversation.getMode() == Conversation.MODE_SINGLE) {
42 packet.setTo(message.getCounterpart());
43 packet.setType(MessagePacket.TYPE_CHAT);
44 if (!isWithSelf) {
45 packet.addChild("request", "urn:xmpp:receipts");
46 }
47 } else if (message.isPrivateMessage()) {
48 packet.setTo(message.getCounterpart());
49 packet.setType(MessagePacket.TYPE_CHAT);
50 packet.addChild("x", "http://jabber.org/protocol/muc#user");
51 packet.addChild("request", "urn:xmpp:receipts");
52 } else {
53 packet.setTo(message.getCounterpart().asBareJid());
54 packet.setType(MessagePacket.TYPE_GROUPCHAT);
55 }
56 if (conversation.isSingleOrPrivateAndNonAnonymous() && !message.isPrivateMessage()) {
57 packet.addChild("markable", "urn:xmpp:chat-markers:0");
58 }
59 packet.setFrom(account.getJid());
60 packet.setId(message.getUuid());
61 if (conversation.getMode() == Conversational.MODE_SINGLE || message.isPrivateMessage() || !conversation.getMucOptions().stableId()) {
62 packet.addChild("origin-id", Namespace.STANZA_IDS).setAttribute("id", message.getUuid());
63 }
64 if (message.edited()) {
65 packet.addChild("replace", "urn:xmpp:message-correct:0").setAttribute("id", message.getEditedIdWireFormat());
66 }
67 if (!legacyEncryption) {
68 if (message.getSubject() != null && message.getSubject().length() > 0) packet.addChild("subject").setContent(message.getSubject());
69 // Legacy encryption can't handle advanced payloads
70 for (Element el : message.getPayloads()) {
71 packet.addChild(el);
72 }
73 } else {
74 for (Element el : message.getPayloads()) {
75 if ("thread".equals(el.getName())) packet.addChild(el);
76 }
77 }
78 return packet;
79 }
80
81 public void addDelay(MessagePacket packet, long timestamp) {
82 final SimpleDateFormat mDateFormat = new SimpleDateFormat(
83 "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
84 mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
85 Element delay = packet.addChild("delay", "urn:xmpp:delay");
86 Date date = new Date(timestamp);
87 delay.setAttribute("stamp", mDateFormat.format(date));
88 }
89
90 public MessagePacket generateAxolotlChat(Message message, XmppAxolotlMessage axolotlMessage) {
91 MessagePacket packet = preparePacket(message, true);
92 if (axolotlMessage == null) {
93 return null;
94 }
95 packet.setAxolotlMessage(axolotlMessage.toElement());
96 packet.setBody(OMEMO_FALLBACK_MESSAGE);
97 packet.addChild("store", "urn:xmpp:hints");
98 packet.addChild("encryption", "urn:xmpp:eme:0")
99 .setAttribute("name", "OMEMO")
100 .setAttribute("namespace", AxolotlService.PEP_PREFIX);
101 return packet;
102 }
103
104 public MessagePacket generateKeyTransportMessage(Jid to, XmppAxolotlMessage axolotlMessage) {
105 MessagePacket packet = new MessagePacket();
106 packet.setType(MessagePacket.TYPE_CHAT);
107 packet.setTo(to);
108 packet.setAxolotlMessage(axolotlMessage.toElement());
109 packet.addChild("store", "urn:xmpp:hints");
110 return packet;
111 }
112
113 public MessagePacket generateChat(Message message) {
114 MessagePacket packet = preparePacket(message, false);
115 if (message.hasFileOnRemoteHost()) {
116 final Message.FileParams fileParams = message.getFileParams();
117
118 if (message.getFallbacks(Namespace.OOB).isEmpty()) {
119 if (message.getBody().equals("")) {
120 message.setBody(fileParams.url);
121 final var fallback = new Element("fallback", "urn:xmpp:fallback:0").setAttribute("for", Namespace.OOB);
122 fallback.addChild("body", "urn:xmpp:fallback:0");
123 message.addPayload(fallback);
124 } else {
125 long start = message.getRawBody().codePointCount(0, message.getRawBody().length());
126 message.appendBody(fileParams.url);
127 final var fallback = new Element("fallback", "urn:xmpp:fallback:0").setAttribute("for", Namespace.OOB);
128 fallback.addChild("body", "urn:xmpp:fallback:0")
129 .setAttribute("start", String.valueOf(start))
130 .setAttribute("end", String.valueOf(start + fileParams.url.length()));
131 message.addPayload(fallback);
132 }
133 }
134
135 packet = preparePacket(message, false);
136 packet.addChild("x", Namespace.OOB).addChild("url").setContent(fileParams.url);
137 }
138 if (message.getRawBody() != null) packet.setBody(message.getRawBody());
139 return packet;
140 }
141
142 public MessagePacket generatePgpChat(Message message) {
143 MessagePacket packet = preparePacket(message, true);
144 if (message.hasFileOnRemoteHost()) {
145 Message.FileParams fileParams = message.getFileParams();
146 final String url = fileParams.url;
147 packet.setBody(url);
148 packet.addChild("x", Namespace.OOB).addChild("url").setContent(url);
149 packet.addChild("fallback", "urn:xmpp:fallback:0").setAttribute("for", Namespace.OOB)
150 .addChild("body", "urn:xmpp:fallback:0");
151 } else {
152 if (Config.supportUnencrypted()) {
153 packet.setBody(PGP_FALLBACK_MESSAGE);
154 }
155 if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
156 packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
157 } else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
158 packet.addChild("x", "jabber:x:encrypted").setContent(message.getBody());
159 }
160 packet.addChild("encryption", "urn:xmpp:eme:0")
161 .setAttribute("namespace", "jabber:x:encrypted");
162 }
163 return packet;
164 }
165
166 public MessagePacket generateChatState(Conversation conversation) {
167 final Account account = conversation.getAccount();
168 MessagePacket packet = new MessagePacket();
169 packet.setType(conversation.getMode() == Conversation.MODE_MULTI ? MessagePacket.TYPE_GROUPCHAT : MessagePacket.TYPE_CHAT);
170 packet.setTo(conversation.getJid().asBareJid());
171 packet.setFrom(account.getJid());
172 packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
173 packet.addChild("no-store", "urn:xmpp:hints");
174 packet.addChild("no-storage", "urn:xmpp:hints"); //wrong! don't copy this. Its *store*
175 return packet;
176 }
177
178 public MessagePacket confirm(final Message message) {
179 final boolean groupChat = message.getConversation().getMode() == Conversational.MODE_MULTI;
180 final Jid to = message.getCounterpart();
181 final MessagePacket packet = new MessagePacket();
182 packet.setType(groupChat ? MessagePacket.TYPE_GROUPCHAT : MessagePacket.TYPE_CHAT);
183 packet.setTo(groupChat ? to.asBareJid() : to);
184 final Element displayed = packet.addChild("displayed", "urn:xmpp:chat-markers:0");
185 if (groupChat) {
186 final String stanzaId = message.getServerMsgId();
187 if (stanzaId != null) {
188 displayed.setAttribute("id", stanzaId);
189 } else {
190 displayed.setAttribute("sender", to.toString());
191 displayed.setAttribute("id", message.getRemoteMsgId());
192 }
193 } else {
194 displayed.setAttribute("id", message.getRemoteMsgId());
195 }
196 packet.addChild("store", "urn:xmpp:hints");
197 return packet;
198 }
199
200 public MessagePacket conferenceSubject(Conversation conversation, String subject) {
201 MessagePacket packet = new MessagePacket();
202 packet.setType(MessagePacket.TYPE_GROUPCHAT);
203 packet.setTo(conversation.getJid().asBareJid());
204 packet.addChild("subject").setContent(subject);
205 packet.setFrom(conversation.getAccount().getJid().asBareJid());
206 return packet;
207 }
208
209 public MessagePacket requestVoice(Jid jid) {
210 MessagePacket packet = new MessagePacket();
211 packet.setType(MessagePacket.TYPE_NORMAL);
212 packet.setTo(jid.asBareJid());
213 Data form = new Data();
214 form.setFormType("http://jabber.org/protocol/muc#request");
215 form.put("muc#role", "participant");
216 form.submit();
217 packet.addChild(form);
218 return packet;
219 }
220
221 public MessagePacket directInvite(final Conversation conversation, final Jid contact) {
222 MessagePacket packet = new MessagePacket();
223 packet.setType(MessagePacket.TYPE_NORMAL);
224 packet.setTo(contact);
225 packet.setFrom(conversation.getAccount().getJid());
226 Element x = packet.addChild("x", "jabber:x:conference");
227 x.setAttribute("jid", conversation.getJid().asBareJid());
228 String password = conversation.getMucOptions().getPassword();
229 if (password != null) {
230 x.setAttribute("password", password);
231 }
232 if (contact.isFullJid()) {
233 packet.addChild("no-store", "urn:xmpp:hints");
234 packet.addChild("no-copy", "urn:xmpp:hints");
235 }
236 return packet;
237 }
238
239 public MessagePacket invite(final Conversation conversation, final Jid contact) {
240 final MessagePacket packet = new MessagePacket();
241 packet.setTo(conversation.getJid().asBareJid());
242 packet.setFrom(conversation.getAccount().getJid());
243 Element x = new Element("x");
244 x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
245 Element invite = new Element("invite");
246 invite.setAttribute("to", contact.asBareJid());
247 x.addChild(invite);
248 packet.addChild(x);
249 return packet;
250 }
251
252 public MessagePacket received(Account account, final Jid from, final String id, ArrayList<String> namespaces, int type) {
253 final MessagePacket receivedPacket = new MessagePacket();
254 receivedPacket.setType(type);
255 receivedPacket.setTo(from);
256 receivedPacket.setFrom(account.getJid());
257 for (final String namespace : namespaces) {
258 receivedPacket.addChild("received", namespace).setAttribute("id", id);
259 }
260 receivedPacket.addChild("store", "urn:xmpp:hints");
261 return receivedPacket;
262 }
263
264 public MessagePacket received(Account account, Jid to, String id) {
265 MessagePacket packet = new MessagePacket();
266 packet.setFrom(account.getJid());
267 packet.setTo(to);
268 packet.addChild("received", "urn:xmpp:receipts").setAttribute("id", id);
269 packet.addChild("store", "urn:xmpp:hints");
270 return packet;
271 }
272
273 public MessagePacket sessionFinish(
274 final Jid with, final String sessionId, final Reason reason) {
275 final MessagePacket packet = new MessagePacket();
276 packet.setType(MessagePacket.TYPE_CHAT);
277 packet.setTo(with);
278 final Element finish = packet.addChild("finish", Namespace.JINGLE_MESSAGE);
279 finish.setAttribute("id", sessionId);
280 final Element reasonElement = finish.addChild("reason", Namespace.JINGLE);
281 reasonElement.addChild(reason.toString());
282 packet.addChild("store", "urn:xmpp:hints");
283 return packet;
284 }
285
286 public MessagePacket sessionProposal(final JingleConnectionManager.RtpSessionProposal proposal) {
287 final MessagePacket packet = new MessagePacket();
288 packet.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
289 packet.setTo(proposal.with);
290 packet.setId(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX + proposal.sessionId);
291 final Element propose = packet.addChild("propose", Namespace.JINGLE_MESSAGE);
292 propose.setAttribute("id", proposal.sessionId);
293 for (final Media media : proposal.media) {
294 propose.addChild("description", Namespace.JINGLE_APPS_RTP).setAttribute("media", media.toString());
295 }
296 packet.addChild("request", "urn:xmpp:receipts");
297 packet.addChild("store", "urn:xmpp:hints");
298 return packet;
299 }
300
301 public MessagePacket sessionRetract(final JingleConnectionManager.RtpSessionProposal proposal) {
302 final MessagePacket packet = new MessagePacket();
303 packet.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
304 packet.setTo(proposal.with);
305 final Element propose = packet.addChild("retract", Namespace.JINGLE_MESSAGE);
306 propose.setAttribute("id", proposal.sessionId);
307 propose.addChild("description", Namespace.JINGLE_APPS_RTP);
308 packet.addChild("store", "urn:xmpp:hints");
309 return packet;
310 }
311
312 public MessagePacket sessionReject(final Jid with, final String sessionId) {
313 final MessagePacket packet = new MessagePacket();
314 packet.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
315 packet.setTo(with);
316 final Element propose = packet.addChild("reject", Namespace.JINGLE_MESSAGE);
317 propose.setAttribute("id", sessionId);
318 propose.addChild("description", Namespace.JINGLE_APPS_RTP);
319 packet.addChild("store", "urn:xmpp:hints");
320 return packet;
321 }
322}