Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/presencereceivetask.h

+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef THIRD_PARTY_LIBJINGLE_FILES_WEBRTC_LIBJINGLE_XMPP_PRESENCERECEIVETASK_H_
+#define THIRD_PARTY_LIBJINGLE_FILES_WEBRTC_LIBJINGLE_XMPP_PRESENCERECEIVETASK_H_
+
+#include "webrtc/base/sigslot.h"
+
+#include "webrtc/libjingle/xmpp/presencestatus.h"
+#include "webrtc/libjingle/xmpp/xmpptask.h"
+
+namespace buzz {
+
+// A task to receive presence status callbacks from the XMPP server.
+class PresenceReceiveTask : public XmppTask {
+ public:
+  // Arguments:
+  //   parent a reference to task interface associated withe the XMPP client.
+  explicit PresenceReceiveTask(XmppTaskParentInterface* parent);
+
+  // Shuts down the thread associated with this task.
+  virtual ~PresenceReceiveTask();
+
+  // Starts pulling queued status messages and dispatching them to the
+  // PresenceUpdate() callback.
+  virtual int ProcessStart();
+
+  // Slot for presence message callbacks
+  sigslot::signal1<const PresenceStatus&> PresenceUpdate;
+
+ protected:
+  // Called by the XMPP engine when presence stanzas are received from the
+  // server.
+  virtual bool HandleStanza(const XmlElement * stanza);
+
+ private:
+  // Handles presence stanzas by converting the data to PresenceStatus
+  // objects and passing those along to the SignalStatusUpadate() callback.
+  void HandlePresence(const Jid& from, const XmlElement * stanza);
+
+  // Extracts presence information for the presence stanza sent form the
+  // server.
+  static void DecodeStatus(const Jid& from, const XmlElement * stanza,
+                           PresenceStatus* status);
+};
+
+} // namespace buzz
+
+#endif // THIRD_PARTY_LIBJINGLE_FILES_WEBRTC_LIBJINGLE_XMPP_PRESENCERECEIVETASK_H_