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 #ifndef THIRD_PARTY_LIBJINGLE_FILES_TALK_XMPP_PRESENCERECEIVETASK_H_ 29 #define THIRD_PARTY_LIBJINGLE_FILES_TALK_XMPP_PRESENCERECEIVETASK_H_ 30 31 #include "talk/base/sigslot.h" 32 33 #include "talk/xmpp/presencestatus.h" 34 #include "talk/xmpp/xmpptask.h" 35 36 namespace buzz { 37 38 // A task to receive presence status callbacks from the XMPP server. 39 class PresenceReceiveTask : public XmppTask { 40 public: 41 // Arguments: 42 // parent a reference to task interface associated withe the XMPP client. 43 explicit PresenceReceiveTask(XmppTaskParentInterface* parent); 44 45 // Shuts down the thread associated with this task. 46 virtual ~PresenceReceiveTask(); 47 48 // Starts pulling queued status messages and dispatching them to the 49 // PresenceUpdate() callback. 50 virtual int ProcessStart(); 51 52 // Slot for presence message callbacks 53 sigslot::signal1<const PresenceStatus&> PresenceUpdate; 54 55 protected: 56 // Called by the XMPP engine when presence stanzas are received from the 57 // server. 58 virtual bool HandleStanza(const XmlElement * stanza); 59 60 private: 61 // Handles presence stanzas by converting the data to PresenceStatus 62 // objects and passing those along to the SignalStatusUpadate() callback. 63 void HandlePresence(const Jid& from, const XmlElement * stanza); 64 65 // Extracts presence information for the presence stanza sent form the 66 // server. 67 static void DecodeStatus(const Jid& from, const XmlElement * stanza, 68 PresenceStatus* status); 69 }; 70 71 } // namespace buzz 72 73 #endif // THIRD_PARTY_LIBJINGLE_FILES_TALK_XMPP_PRESENCERECEIVETASK_H_ 74