Move SignalingAddress to remoting/signaling

remoting/signaling/signaling_address.h

+// Copyright 2017 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.
+
+#ifndef REMOTING_SIGNALING_SIGNALING_ADDRESS_H_
+#define REMOTING_SIGNALING_SIGNALING_ADDRESS_H_
+
+#include <string>
+
+namespace buzz {
+class XmlElement;
+}  // namespace buzz
+
+namespace remoting {
+
+// Represents an address of a Chromoting endpoint and its routing channel.
+class SignalingAddress {
+ public:
+  enum class Channel { LCS, XMPP };
+  enum Direction { TO, FROM };
+
+  static SignalingAddress Parse(const buzz::XmlElement* iq,
+                                Direction direction,
+                                std::string* error);
+
+  void SetInMessage(buzz::XmlElement* message, Direction direction) const;
+
+  SignalingAddress();
+  explicit SignalingAddress(const std::string& jid);
+  SignalingAddress(const std::string& jid,
+                   const std::string& endpoint_id,
+                   Channel channel);
+
+  const std::string& jid() const { return jid_; }
+  const std::string& endpoint_id() const { return endpoint_id_; }
+  Channel channel() const { return channel_; }
+  const std::string& id() const {
+    return (channel_ == Channel::LCS) ? endpoint_id_ : jid_;
+  }
+
+  bool empty() const { return jid_.empty(); }
+
+  bool operator==(const SignalingAddress& other) const;
+  bool operator!=(const SignalingAddress& other) const;
+
+ private:
+  // Represents the |to| or |from| field in an IQ stanza.
+  std::string jid_;
+
+  // Represents the identifier of an endpoint. In  LCS, this is the LCS address
+  // encoded in a JID like format.  In XMPP, it is empty.
+  std::string endpoint_id_;
+
+  Channel channel_;
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_SIGNALING_SIGNALING_ADDRESS_H_