• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * libjingle
3  * Copyright 2004--2012, 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/xmpp/presencereceivetask.h"
29 
30 #include "talk/xmpp/constants.h"
31 #include "webrtc/base/stringencode.h"
32 
33 namespace buzz {
34 
IsUtf8FirstByte(int c)35 static bool IsUtf8FirstByte(int c) {
36   return (((c)&0x80)==0) || // is single byte
37     ((unsigned char)((c)-0xc0)<0x3e); // or is lead byte
38 }
39 
PresenceReceiveTask(XmppTaskParentInterface * parent)40 PresenceReceiveTask::PresenceReceiveTask(XmppTaskParentInterface* parent)
41  : XmppTask(parent, XmppEngine::HL_TYPE) {
42 }
43 
~PresenceReceiveTask()44 PresenceReceiveTask::~PresenceReceiveTask() {
45   Stop();
46 }
47 
ProcessStart()48 int PresenceReceiveTask::ProcessStart() {
49   const XmlElement * stanza = NextStanza();
50   if (stanza == NULL) {
51     return STATE_BLOCKED;
52   }
53 
54   Jid from(stanza->Attr(QN_FROM));
55   HandlePresence(from, stanza);
56 
57   return STATE_START;
58 }
59 
HandleStanza(const XmlElement * stanza)60 bool PresenceReceiveTask::HandleStanza(const XmlElement * stanza) {
61   // Verify that this is a presence stanze
62   if (stanza->Name() != QN_PRESENCE) {
63     return false; // not sure if this ever happens.
64   }
65 
66   // Queue it up
67   QueueStanza(stanza);
68 
69   return true;
70 }
71 
HandlePresence(const Jid & from,const XmlElement * stanza)72 void PresenceReceiveTask::HandlePresence(const Jid& from,
73                                          const XmlElement* stanza) {
74   if (stanza->Attr(QN_TYPE) == STR_ERROR) {
75     return;
76   }
77 
78   PresenceStatus status;
79   DecodeStatus(from, stanza, &status);
80   PresenceUpdate(status);
81 }
82 
DecodeStatus(const Jid & from,const XmlElement * stanza,PresenceStatus * presence_status)83 void PresenceReceiveTask::DecodeStatus(const Jid& from,
84                                        const XmlElement* stanza,
85                                        PresenceStatus* presence_status) {
86   presence_status->set_jid(from);
87   if (stanza->Attr(QN_TYPE) == STR_UNAVAILABLE) {
88     presence_status->set_available(false);
89   } else {
90     presence_status->set_available(true);
91     const XmlElement * status_elem = stanza->FirstNamed(QN_STATUS);
92     if (status_elem != NULL) {
93       presence_status->set_status(status_elem->BodyText());
94 
95       // Truncate status messages longer than 300 bytes
96       if (presence_status->status().length() > 300) {
97         size_t len = 300;
98 
99         // Be careful not to split legal utf-8 chars in half
100         while (!IsUtf8FirstByte(presence_status->status()[len]) && len > 0) {
101           len -= 1;
102         }
103         std::string truncated(presence_status->status(), 0, len);
104         presence_status->set_status(truncated);
105       }
106     }
107 
108     const XmlElement * priority = stanza->FirstNamed(QN_PRIORITY);
109     if (priority != NULL) {
110       int pri;
111       if (rtc::FromString(priority->BodyText(), &pri)) {
112         presence_status->set_priority(pri);
113       }
114     }
115 
116     const XmlElement * show = stanza->FirstNamed(QN_SHOW);
117     if (show == NULL || show->FirstChild() == NULL) {
118       presence_status->set_show(PresenceStatus::SHOW_ONLINE);
119     } else if (show->BodyText() == "away") {
120       presence_status->set_show(PresenceStatus::SHOW_AWAY);
121     } else if (show->BodyText() == "xa") {
122       presence_status->set_show(PresenceStatus::SHOW_XA);
123     } else if (show->BodyText() == "dnd") {
124       presence_status->set_show(PresenceStatus::SHOW_DND);
125     } else if (show->BodyText() == "chat") {
126       presence_status->set_show(PresenceStatus::SHOW_CHAT);
127     } else {
128       presence_status->set_show(PresenceStatus::SHOW_ONLINE);
129     }
130 
131     const XmlElement * caps = stanza->FirstNamed(QN_CAPS_C);
132     if (caps != NULL) {
133       std::string node = caps->Attr(QN_NODE);
134       std::string ver = caps->Attr(QN_VER);
135       std::string exts = caps->Attr(QN_EXT);
136 
137       presence_status->set_know_capabilities(true);
138       presence_status->set_caps_node(node);
139       presence_status->set_version(ver);
140     }
141 
142     const XmlElement* delay = stanza->FirstNamed(kQnDelayX);
143     if (delay != NULL) {
144       // Ideally we would parse this according to the Psuedo ISO-8601 rules
145       // that are laid out in JEP-0082:
146       // http://www.jabber.org/jeps/jep-0082.html
147       std::string stamp = delay->Attr(kQnStamp);
148       presence_status->set_sent_time(stamp);
149     }
150 
151     const XmlElement* nick = stanza->FirstNamed(QN_NICKNAME);
152     if (nick) {
153       presence_status->set_nick(nick->BodyText());
154     }
155   }
156 }
157 
158 } // namespace buzz
159