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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/host_change_notification_listener.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "remoting/base/constants.h"
#include "remoting/protocol/jingle_messages.h"
#include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
#include "third_party/webrtc/libjingle/xmpp/constants.h"
using buzz::QName;
using buzz::XmlElement;
namespace remoting {
HostChangeNotificationListener::HostChangeNotificationListener(
Listener* listener,
const std::string& host_id,
SignalStrategy* signal_strategy,
const std::string& directory_bot_jid)
: listener_(listener),
host_id_(host_id),
signal_strategy_(signal_strategy),
directory_bot_jid_(directory_bot_jid),
weak_factory_(this) {
DCHECK(signal_strategy_);
signal_strategy_->AddListener(this);
}
HostChangeNotificationListener::~HostChangeNotificationListener() {
signal_strategy_->RemoveListener(this);
}
void HostChangeNotificationListener::OnSignalStrategyStateChange(
SignalStrategy::State state) {
}
bool HostChangeNotificationListener::OnSignalStrategyIncomingStanza(
const buzz::XmlElement* stanza) {
if (stanza->Name() != buzz::QN_IQ || stanza->Attr(buzz::QN_TYPE) != "set")
return false;
const XmlElement* host_changed_element =
stanza->FirstNamed(QName(kChromotingXmlNamespace, "host-changed"));
if (!host_changed_element)
return false;
const std::string& host_id =
host_changed_element->Attr(QName(kChromotingXmlNamespace, "hostid"));
const std::string& from = stanza->Attr(buzz::QN_FROM);
const std::string& to = stanza->Attr(buzz::QN_TO);
if (host_id == host_id_ && from == directory_bot_jid_ &&
to == signal_strategy_->GetLocalJid()) {
const std::string& operation =
host_changed_element->Attr(QName(kChromotingXmlNamespace, "operation"));
if (operation == "delete") {
// OnHostDeleted() may want delete |signal_strategy_|, but SignalStrategy
// objects cannot be deleted from a Listener callback, so OnHostDeleted()
// has to be invoked later.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&HostChangeNotificationListener::OnHostDeleted,
weak_factory_.GetWeakPtr()));
}
} else {
LOG(ERROR) << "Invalid host-changed message received: " << stanza->Str();
}
return true;
}
void HostChangeNotificationListener::OnHostDeleted() {
listener_->OnHostDeleted();
}
} // namespace remoting
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