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/examples/call/muc.h"
31#include "talk/xmpp/constants.h"
32#include "webrtc/base/stringencode.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  PresenceStatus 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      // Status code=110 or 100 is not guaranteed to be present, so we
104      // only check the item element and Muc join status.
105      if (elem) {
106        if (elem->FirstNamed(QN_MUC_USER_ITEM) &&
107            muc->state() == buzz::Muc::MUC_JOINING) {
108          SignalMucJoined(muc->jid());
109        }
110      }
111    } else {
112      // We've been kicked. Bye.
113      int error = 0;
114      if (stanza->Attr(QN_TYPE) == STR_ERROR) {
115        const XmlElement* elem = stanza->FirstNamed(QN_ERROR);
116        if (elem && elem->HasAttr(QN_CODE)) {
117          error = atoi(elem->Attr(QN_CODE).c_str());
118        }
119      }
120      SignalMucLeft(muc->jid(), error);
121    }
122  } else {
123    MucPresenceStatus s;
124    FillMucStatus(from, stanza, &s);
125    SignalMucStatusUpdate(muc->jid(), s);
126  }
127}
128
129void PresencePushTask::FillStatus(const Jid& from, const XmlElement* stanza,
130                                  PresenceStatus* s) {
131  s->set_jid(from);
132  if (stanza->Attr(QN_TYPE) == STR_UNAVAILABLE) {
133    s->set_available(false);
134  } else {
135    s->set_available(true);
136    const XmlElement * status = stanza->FirstNamed(QN_STATUS);
137    if (status != NULL) {
138      s->set_status(status->BodyText());
139
140      // Truncate status messages longer than 300 bytes
141      if (s->status().length() > 300) {
142        size_t len = 300;
143
144        // Be careful not to split legal utf-8 chars in half
145        while (!IsUtf8FirstByte(s->status()[len]) && len > 0) {
146          len -= 1;
147        }
148        std::string truncated(s->status(), 0, len);
149        s->set_status(truncated);
150      }
151    }
152
153    const XmlElement * priority = stanza->FirstNamed(QN_PRIORITY);
154    if (priority != NULL) {
155      int pri;
156      if (rtc::FromString(priority->BodyText(), &pri)) {
157        s->set_priority(pri);
158      }
159    }
160
161    const XmlElement * show = stanza->FirstNamed(QN_SHOW);
162    if (show == NULL || show->FirstChild() == NULL) {
163      s->set_show(PresenceStatus::SHOW_ONLINE);
164    }
165    else {
166      if (show->BodyText() == "away") {
167        s->set_show(PresenceStatus::SHOW_AWAY);
168      }
169      else if (show->BodyText() == "xa") {
170        s->set_show(PresenceStatus::SHOW_XA);
171      }
172      else if (show->BodyText() == "dnd") {
173        s->set_show(PresenceStatus::SHOW_DND);
174      }
175      else if (show->BodyText() == "chat") {
176        s->set_show(PresenceStatus::SHOW_CHAT);
177      }
178      else {
179        s->set_show(PresenceStatus::SHOW_ONLINE);
180      }
181    }
182
183    const XmlElement * caps = stanza->FirstNamed(QN_CAPS_C);
184    if (caps != NULL) {
185      std::string node = caps->Attr(QN_NODE);
186      std::string ver = caps->Attr(QN_VER);
187      std::string exts = caps->Attr(QN_EXT);
188
189      s->set_know_capabilities(true);
190      s->set_caps_node(node);
191      s->set_version(ver);
192
193      if (ListContainsToken(exts, "voice-v1")) {
194        s->set_voice_capability(true);
195      }
196      if (ListContainsToken(exts, "video-v1")) {
197        s->set_video_capability(true);
198      }
199    }
200
201    const XmlElement* delay = stanza->FirstNamed(kQnDelayX);
202    if (delay != NULL) {
203      // Ideally we would parse this according to the Psuedo ISO-8601 rules
204      // that are laid out in JEP-0082:
205      // http://www.jabber.org/jeps/jep-0082.html
206      std::string stamp = delay->Attr(kQnStamp);
207      s->set_sent_time(stamp);
208    }
209
210    const XmlElement* nick = stanza->FirstNamed(QN_NICKNAME);
211    if (nick) {
212      s->set_nick(nick->BodyText());
213    }
214  }
215}
216
217void PresencePushTask::FillMucStatus(const Jid& from, const XmlElement* stanza,
218                                     MucPresenceStatus* s) {
219  FillStatus(from, stanza, s);
220}
221
222}
223