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