json serialization for rpc-relevant monero types

Structured {de-,}serialization methods for (many new) types
which are used for requests or responses in the RPC.

New types include RPC requests and responses, and structs which compose
types within those.

# Conflicts:
#	src/cryptonote_core/blockchain.cpp

1 files changed, 131 insertions, 0 deletions

diff --git a/src/rpc/message.h b/src/rpc/message.h
new file mode 100644
index 000000000..d1abe3fbe
--- /dev/null
+++ b/src/rpc/message.h
@@ -0,0 +1,131 @@
+// Copyright (c) 2016-2017, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include "rapidjson/document.h"
+#include "rpc/message_data_structs.h"
+#include <string>
+
+/* I normally hate using macros, but in this case it would be untenably
+ * verbose to not use a macro.  This macro saves the trouble of explicitly
+ * writing the below if block for every single RPC call.
+ */
+#define REQ_RESP_TYPES_MACRO( runtime_str, type, reqjson, resp_message_ptr, handler) \
+  \
+  if (runtime_str == type::name) \
+  { \
+    type::Request reqvar; \
+    type::Response *respvar = new type::Response(); \
+    \
+    reqvar.fromJson(reqjson); \
+    \
+    handler(reqvar, *respvar); \
+    \
+    resp_message_ptr = respvar; \
+  }
+
+namespace cryptonote
+{
+
+namespace rpc
+{
+
+  class Message
+  {
+    public:
+      static const char* STATUS_OK;
+      static const char* STATUS_RETRY;
+      static const char* STATUS_FAILED;
+      static const char* STATUS_BAD_REQUEST;
+      static const char* STATUS_BAD_JSON;
+
+      Message() : status(STATUS_OK) { }
+
+      virtual ~Message() { }
+
+      virtual rapidjson::Value toJson(rapidjson::Document& doc) const;
+
+      virtual void fromJson(rapidjson::Value& val);
+
+      std::string status;
+      std::string error_details;
+      uint32_t rpc_version;
+  };
+
+  class FullMessage
+  {
+    public:
+      ~FullMessage() { }
+
+      FullMessage(FullMessage&& rhs) noexcept : doc(std::move(rhs.doc)) { }
+
+      FullMessage(const std::string& json_string, bool request=false);
+
+      std::string getJson();
+
+      std::string getRequestType() const;
+
+      rapidjson::Value& getMessage();
+
+      rapidjson::Value getMessageCopy();
+
+      rapidjson::Value& getID();
+
+      void setID(rapidjson::Value& id);
+
+      cryptonote::rpc::error getError();
+
+      static FullMessage requestMessage(const std::string& request, Message* message);
+      static FullMessage requestMessage(const std::string& request, Message* message, rapidjson::Value& id);
+
+      static FullMessage responseMessage(Message* message);
+      static FullMessage responseMessage(Message* message, rapidjson::Value& id);
+
+      static FullMessage* timeoutMessage();
+    private:
+
+      FullMessage() = default;
+
+      FullMessage(const std::string& request, Message* message);
+      FullMessage(Message* message);
+
+      rapidjson::Document doc;
+  };
+
+
+  // convenience functions for bad input
+  std::string BAD_REQUEST(const std::string& request);
+  std::string BAD_REQUEST(const std::string& request, rapidjson::Value& id);
+
+  std::string BAD_JSON(const std::string& error_details);
+
+
+}  // namespace rpc
+
+}  // namespace cryptonote