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
36namespace buzz {
37
38// string helper functions -----------------------------------------------------
39
40static bool
41IsXmlSpace(int ch) {
42  return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';
43}
44
45static 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
57bool PresencePushTask::HandleStanza(const XmlElement * stanza) {
58  if (stanza->Name() != QN_PRESENCE)
59    return false;
60  QueueStanza(stanza);
61  return true;
62}
63
64static bool IsUtf8FirstByte(int c) {
65  return (((c)&0x80)==0) || // is single byte
66    ((unsigned char)((c)-0xc0)<0x3e); // or is lead byte
67}
68
69int 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
86void 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
96void 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
128void 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
214void 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