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