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      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 #ifndef _SESSIONMANAGERTASK_H_
     29 #define _SESSIONMANAGERTASK_H_
     30 
     31 #include "talk/p2p/base/sessionmanager.h"
     32 #include "talk/p2p/client/sessionsendtask.h"
     33 #include "talk/xmpp/xmppengine.h"
     34 #include "talk/xmpp/xmpptask.h"
     35 
     36 namespace cricket {
     37 
     38 // This class handles sending and receiving XMPP messages on behalf of the
     39 // SessionManager.  The sending part is handed over to SessionSendTask.
     40 
     41 class SessionManagerTask : public buzz::XmppTask {
     42  public:
     43   SessionManagerTask(buzz::XmppTaskParentInterface* parent,
     44                      SessionManager* session_manager)
     45       : buzz::XmppTask(parent, buzz::XmppEngine::HL_SINGLE),
     46         session_manager_(session_manager) {
     47   }
     48 
     49   ~SessionManagerTask() {
     50   }
     51 
     52   // Turns on simple support for sending messages, using SessionSendTask.
     53   void EnableOutgoingMessages() {
     54     session_manager_->SignalOutgoingMessage.connect(
     55         this, &SessionManagerTask::OnOutgoingMessage);
     56     session_manager_->SignalRequestSignaling.connect(
     57         session_manager_, &SessionManager::OnSignalingReady);
     58   }
     59 
     60   virtual int ProcessStart() {
     61     const buzz::XmlElement *stanza = NextStanza();
     62     if (stanza == NULL)
     63       return STATE_BLOCKED;
     64     session_manager_->OnIncomingMessage(stanza);
     65     return STATE_START;
     66   }
     67 
     68  protected:
     69   virtual bool HandleStanza(const buzz::XmlElement *stanza) {
     70     if (!session_manager_->IsSessionMessage(stanza))
     71       return false;
     72     // Responses are handled by the SessionSendTask that sent the request.
     73     //if (stanza->Attr(buzz::QN_TYPE) != buzz::STR_SET)
     74     //  return false;
     75     QueueStanza(stanza);
     76     return true;
     77   }
     78 
     79  private:
     80   void OnOutgoingMessage(SessionManager* manager,
     81                          const buzz::XmlElement* stanza) {
     82     cricket::SessionSendTask* sender =
     83         new cricket::SessionSendTask(parent_, session_manager_);
     84     sender->Send(stanza);
     85     sender->Start();
     86   }
     87 
     88   SessionManager* session_manager_;
     89 };
     90 
     91 }  // namespace cricket
     92 
     93 #endif // _SESSIONMANAGERTASK_H_
     94