daemon/rpc: updates command and RPC

subcommands "check", "download", and "update".
update is not yet implemented.

src/daemon/command_parser_executor.cpp

@@ -552,4 +552,15 @@ bool t_command_parser_executor::print_blockchain_dynamic_stats(const std::vector
   return m_executor.print_blockchain_dynamic_stats(nblocks);
 }
 
+bool t_command_parser_executor::update(const std::vector<std::string>& args)
+{
+  if(args.size() != 1)
+  {
+    std::cout << "Exactly one parameter is needed: check, download, or update" << std::endl;
+    return false;
+  }
+
+  return m_executor.update(args.front());
+}
+
 } // namespace daemonize

src/daemon/command_parser_executor.h

@@ -130,6 +130,8 @@ public:
   bool alt_chain_info(const std::vector<std::string>& args);
 
   bool print_blockchain_dynamic_stats(const std::vector<std::string>& args);
+
+  bool update(const std::vector<std::string>& args);
 };
 
 } // namespace daemonize

src/daemon/command_server.cpp

@@ -243,6 +243,11 @@ t_command_server::t_command_server(
     , std::bind(&t_command_parser_executor::print_blockchain_dynamic_stats, &m_parser, p::_1)
     , "Print information about current blockchain dynamic state"
     );
+    m_command_lookup.set_handler(
+      "update"
+    , std::bind(&t_command_parser_executor::update, &m_parser, p::_1)
+    , "subcommands: check (check if an update is available), download (download it is there is), update (not implemented)"
+    );
 }
 
 bool t_command_server::process_command_str(const std::string& cmd)

src/daemon/rpc_command_executor.cpp

@@ -1580,4 +1580,51 @@ bool t_rpc_command_executor::print_blockchain_dynamic_stats(uint64_t nblocks)
   return true;
 }
 
+bool t_rpc_command_executor::update(const std::string &command)
+{
+  cryptonote::COMMAND_RPC_UPDATE::request req;
+  cryptonote::COMMAND_RPC_UPDATE::response res;
+  epee::json_rpc::error error_resp;
+
+  std::string fail_message = "Problem fetching info";
+
+  req.command = command;
+  if (m_is_rpc)
+  {
+    if (!m_rpc_client->rpc_request(req, res, "/update", fail_message.c_str()))
+    {
+      return true;
+    }
+  }
+  else
+  {
+    if (!m_rpc_server->on_update(req, res) || res.status != CORE_RPC_STATUS_OK)
+    {
+      tools::fail_msg_writer() << fail_message.c_str();
+      return true;
+    }
+  }
+
+  if (!res.update)
+  {
+    tools::msg_writer() << "No update available";
+    return true;
+  }
+
+  tools::msg_writer() << "Update available: v" << res.version << ": " << res.user_uri << ", hash " << res.hash;
+  if (command == "check")
+    return true;
+
+  if (!res.path.empty())
+    tools::msg_writer() << "Update downloaded to: " << res.path;
+  else
+    tools::msg_writer() << "Update download failed: " << res.status;
+  if (command == "download")
+    return true;
+
+  tools::msg_writer() << "'update' not implemented yet";
+
+  return true;
+}
+
 }// namespace daemonize

src/daemon/rpc_command_executor.h

@@ -151,6 +151,8 @@ public:
   bool alt_chain_info();
 
   bool print_blockchain_dynamic_stats(uint64_t nblocks);
+
+  bool update(const std::string &command);
 };
 
 } // namespace daemonize