1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/examples/call/presencepushtask.h"
29
30 #include "talk/base/stringencode.h"
31 #include "talk/examples/call/muc.h"
32 #include "talk/xmpp/constants.h"
33
34
35
36 namespace buzz {
37
38 // string helper functions -----------------------------------------------------
39
40 static bool
IsXmlSpace(int ch)41 IsXmlSpace(int ch) {
42 return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';
43 }
44
ListContainsToken(const std::string & list,const std::string & token)45 static bool ListContainsToken(const std::string & list,
46 const std::string & token) {
47 size_t i = list.find(token);
48 if (i == std::string::npos || token.empty())
49 return false;
50 bool boundary_before = (i == 0 || IsXmlSpace(list[i - 1]));
51 bool boundary_after = (i == list.length() - token.length() ||
52 IsXmlSpace(list[i + token.length()]));
53 return boundary_before && boundary_after;
54 }
55
56
HandleStanza(const XmlElement * stanza)57 bool PresencePushTask::HandleStanza(const XmlElement * stanza) {
58 if (stanza->Name() != QN_PRESENCE)
59 return false;
60 QueueStanza(stanza);
61 return true;
62 }
63
IsUtf8FirstByte(int c)64 static bool IsUtf8FirstByte(int c) {
65 return (((c)&0x80)==0) || // is single byte
66 ((unsigned char)((c)-0xc0)<0x3e); // or is lead byte
67 }
68
ProcessStart()69 int PresencePushTask::ProcessStart() {
70 const XmlElement * stanza = NextStanza();
71 if (stanza == NULL)
72 return STATE_BLOCKED;
73
74 Jid from(stanza->Attr(QN_FROM));
75 std::map<Jid, buzz::Muc*>::const_iterator elem =
76 client_->mucs().find(from.BareJid());
77 if (elem == client_->mucs().end()) {
78 HandlePresence(from, stanza);
79 } else {
80 HandleMucPresence(elem->second, from, stanza);
81 }
82
83 return STATE_START;
84 }
85
HandlePresence(const Jid & from,const XmlElement * stanza)86 void PresencePushTask::HandlePresence(const Jid& from,
87 const XmlElement* stanza) {
88 if (stanza->Attr(QN_TYPE) == STR_ERROR)
89 return;
90
91 Status s;
92 FillStatus(from, stanza, &s);
93 SignalStatusUpdate(s);
94 }
95
HandleMucPresence(buzz::Muc * muc,const Jid & from,const XmlElement * stanza)96 void PresencePushTask::HandleMucPresence(buzz::Muc* muc,
97 const Jid& from,
98 const XmlElement* stanza) {
99 if (from == muc->local_jid()) {
100 if (!stanza->HasAttr(QN_TYPE)) {
101 // We joined the MUC.
102 const XmlElement* elem = stanza->FirstNamed(QN_MUC_USER_X);
103 if (elem) {
104 elem = elem->FirstNamed(QN_MUC_USER_STATUS);
105 }
106 if (elem && (elem->Attr(QN_CODE) == "110" ||
107 elem->Attr(QN_CODE) == "100")) {
108 SignalMucJoined(muc->jid());
109 }
110 } else {
111 // We've been kicked. Bye.
112 int error = 0;
113 if (stanza->Attr(QN_TYPE) == STR_ERROR) {
114 const XmlElement* elem = stanza->FirstNamed(QN_ERROR);
115 if (elem && elem->HasAttr(QN_CODE)) {
116 error = atoi(elem->Attr(QN_CODE).c_str());
117 }
118 }
119 SignalMucLeft(muc->jid(), error);
120 }
121 } else {
122 MucStatus s;
123 FillMucStatus(from, stanza, &s);
124 SignalMucStatusUpdate(muc->jid(), s);
125 }
126 }
127
FillStatus(const Jid & from,const XmlElement * stanza,Status * s)128 void PresencePushTask::FillStatus(const Jid& from, const XmlElement* stanza,
129 Status* s) {
130 s->set_jid(from);
131 if (stanza->Attr(QN_TYPE) == STR_UNAVAILABLE) {
132 s->set_available(false);
133 } else {
134 s->set_available(true);
135 const XmlElement * status = stanza->FirstNamed(QN_STATUS);
136 if (status != NULL) {
137 s->set_status(status->BodyText());
138
139 // Truncate status messages longer than 300 bytes
140 if (s->status().length() > 300) {
141 size_t len = 300;
142
143 // Be careful not to split legal utf-8 chars in half
144 while (!IsUtf8FirstByte(s->status()[len]) && len > 0) {
145 len -= 1;
146 }
147 std::string truncated(s->status(), 0, len);
148 s->set_status(truncated);
149 }
150 }
151
152 const XmlElement * priority = stanza->FirstNamed(QN_PRIORITY);
153 if (priority != NULL) {
154 int pri;
155 if (talk_base::FromString(priority->BodyText(), &pri)) {
156 s->set_priority(pri);
157 }
158 }
159
160 const XmlElement * show = stanza->FirstNamed(QN_SHOW);
161 if (show == NULL || show->FirstChild() == NULL) {
162 s->set_show(Status::SHOW_ONLINE);
163 }
164 else {
165 if (show->BodyText() == "away") {
166 s->set_show(Status::SHOW_AWAY);
167 }
168 else if (show->BodyText() == "xa") {
169 s->set_show(Status::SHOW_XA);
170 }
171 else if (show->BodyText() == "dnd") {
172 s->set_show(Status::SHOW_DND);
173 }
174 else if (show->BodyText() == "chat") {
175 s->set_show(Status::SHOW_CHAT);
176 }
177 else {
178 s->set_show(Status::SHOW_ONLINE);
179 }
180 }
181
182 const XmlElement * caps = stanza->FirstNamed(QN_CAPS_C);
183 if (caps != NULL) {
184 std::string node = caps->Attr(QN_NODE);
185 std::string ver = caps->Attr(QN_VER);
186 std::string exts = caps->Attr(QN_EXT);
187
188 s->set_know_capabilities(true);
189
190 if (node == GOOGLE_CLIENT_NODE) {
191 s->set_is_google_client(true);
192 s->set_version(ver);
193 }
194
195 if (ListContainsToken(exts, "voice-v1")) {
196 s->set_phone_capability(true);
197 }
198 if (ListContainsToken(exts, "video-v1")) {
199 s->set_video_capability(true);
200 }
201 }
202
203 const XmlElement* delay = stanza->FirstNamed(kQnDelayX);
204 if (delay != NULL) {
205 // Ideally we would parse this according to the Psuedo ISO-8601 rules
206 // that are laid out in JEP-0082:
207 // http://www.jabber.org/jeps/jep-0082.html
208 std::string stamp = delay->Attr(kQnStamp);
209 s->set_sent_time(stamp);
210 }
211 }
212 }
213
FillMucStatus(const Jid & from,const XmlElement * stanza,MucStatus * s)214 void PresencePushTask::FillMucStatus(const Jid& from, const XmlElement* stanza,
215 MucStatus* s) {
216 // First get the normal user status info. Happily, this is in the same
217 // format as it is for user presence.
218 FillStatus(from, stanza, s);
219
220 // Now look for src IDs, which will be present if this user is in a
221 // multiway call to this MUC.
222 const XmlElement* xstanza = stanza->FirstNamed(QN_MUC_USER_X);
223 if (xstanza) {
224 const XmlElement* media;
225 for (media = xstanza->FirstNamed(QN_GOOGLE_MUC_USER_MEDIA);
226 media; media = media->NextNamed(QN_GOOGLE_MUC_USER_MEDIA)) {
227
228 const XmlElement* type = media->FirstNamed(QN_GOOGLE_MUC_USER_TYPE);
229 if (!type) continue; // Shouldn't happen
230
231 const XmlElement* src_id = media->FirstNamed(QN_GOOGLE_MUC_USER_SRC_ID);
232 if (!src_id) continue; // Shouldn't happen
233
234 char *endptr;
235 uint32 src_id_num = strtoul(src_id->BodyText().c_str(), &endptr, 10);
236 if (src_id->BodyText().c_str()[0] == '\0' || endptr[0] != '\0') {
237 // String is not composed exclusively of leading whitespace plus a
238 // number (shouldn't happen). Ignore it.
239 continue;
240 }
241 // Else it's valid. Set it.
242
243 if (type->BodyText() == "audio") {
244 // This is the audio media element. Get the src-id.
245 s->set_audio_src_id(src_id_num);
246 } else if (type->BodyText() == "video") {
247 // This is the video media element. Get the src-id.
248 s->set_video_src_id(src_id_num);
249 }
250 }
251 }
252 }
253
254 }
255