tools: refactor ndn-autoconfig

Hub face creation and prefix registrations are moved into a new
Procedure class. Main function is simplified.

refs #4158

Change-Id: I15b660e3b8a1bde89498a1cb549a87788de46c7a
diff --git a/tools/ndn-autoconfig/procedure.hpp b/tools/ndn-autoconfig/procedure.hpp
new file mode 100644
index 0000000..0f65b89
--- /dev/null
+++ b/tools/ndn-autoconfig/procedure.hpp
@@ -0,0 +1,92 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2017,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_TOOLS_NDN_AUTOCONFIG_PROCEDURE_HPP
+#define NFD_TOOLS_NDN_AUTOCONFIG_PROCEDURE_HPP
+
+#include "stage.hpp"
+#include <ndn-cxx/face.hpp>
+#include <ndn-cxx/mgmt/nfd/controller.hpp>
+#include <ndn-cxx/security/key-chain.hpp>
+
+namespace ndn {
+namespace tools {
+namespace autoconfig {
+
+struct Options
+{
+  std::string ndnFchUrl = "http://ndn-fch.named-data.net"; ///< HTTP base URL of NDN-FCH service
+};
+
+class Procedure : noncopyable
+{
+public:
+  Procedure(Face& face, KeyChain& keyChain);
+
+  void
+  initialize(const Options& options);
+
+  /** \brief run HUB discovery procedure once
+   */
+  void
+  runOnce();
+
+  boost::asio::io_service&
+  getIoService()
+  {
+    return m_face.getIoService();
+  }
+
+private:
+  VIRTUAL_WITH_TESTS void
+  makeStages(const Options& options);
+
+  void
+  connect(const FaceUri& hubFaceUri);
+
+  void
+  registerPrefixes(uint64_t hubFaceId, size_t index = 0);
+
+public:
+  /** \brief signal when procedure completes
+   *
+   *  Argument indicates whether the procedure succeeds (true) or fails (false).
+   */
+  util::Signal<Procedure, bool> onComplete;
+
+PROTECTED_WITH_TESTS_ELSE_PRIVATE:
+  std::vector<unique_ptr<Stage>> m_stages;
+
+private:
+  Face& m_face;
+  KeyChain& m_keyChain;
+  nfd::Controller m_controller;
+};
+
+} // namespace autoconfig
+} // namespace tools
+} // namespace ndn
+
+#endif // NFD_TOOLS_NDN_AUTOCONFIG_PROCEDURE_HPP