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