Merge pull request #56 from BrainlessLabs/development

1. Objects can be converted to messagepack
2. Objects can be converted into messagepack
3. Added some examples

Co-Authored-By: BrainlessLabs <brainlesslabs@users.noreply.github.com>
Co-Authored-By: BrainlessLabs <sp-mishra@users.noreply.github.com>

include/blib/bun/impl/orm.hpp

@@ -16,6 +16,10 @@
 #include <cstddef>
 #include <memory>
 #include <bitset>
+#include <third_party/fmt/format.hpp>
+#include <third_party/rapidjson/rapidjson.h>
+#include <third_party/rapidjson/document.h>
+#include <third_party/json/json.hpp>
 #include <boost/mpl/bool.hpp>
 #include <boost/preprocessor.hpp>
 #include <boost/fusion/sequence.hpp>
@@ -32,9 +36,6 @@
 #include <boost/preprocessor/tuple/rem.hpp>
 #include <boost/iterator/iterator_facade.hpp>
 #include <boost/proto/proto.hpp>
-#include <third_party/fmt/format.hpp>
-#include <third_party/rapidjson/rapidjson.h>
-#include <third_party/rapidjson/document.h>
 #include <soci/error.h>
 #include "blib/utils/MD5.hpp"
 #include "blib/bun/impl/DbBackend.hpp"
@@ -908,6 +909,7 @@ namespace blib {
             ///        This will distinguish them from other object.
             OidType oid;
 
+			using ByteArray = std::vector<std::uint8_t>;
         public:
             PRef() noexcept : _obj(), _md5(), oid() {}
 
@@ -1048,6 +1050,18 @@ namespace blib {
 				blib::bun::__private::QueryHelper<ObjType>::jsonToObject(document, *_obj.get());
 			}
 
+			ByteArray toMesssagepack() const {
+				const std::string json_str = toJson();
+				const auto json_obj = nlohmann::json::parse(json_str);
+				return nlohmann::json::to_msgpack(json_obj);
+			}
+
+			void fromMessagepack(ByteArray const& messagePack) {
+				const auto json = nlohmann::json::from_msgpack(messagePack);
+				const std::string json_str = json.dump();
+				fromJson(json_str);
+			}
+
         private:
             void copyToOther(PRef& in_other) {
                 in_other.oid = oid;

src/Generate.cpp

@@ -1,3 +1,4 @@
+#include "blib/bun/bun.hpp"
 #include <boost/core/noncopyable.hpp>
 #include <boost/optional.hpp>
 #include <boost/preprocessor.hpp>
@@ -7,7 +8,6 @@
 #include <soci/sqlite3/soci-sqlite3.h>
 #include <boost/preprocessor.hpp>
 #include <third_party/fmt/format.hpp>
-#include "blib/bun/bun.hpp"
 
 using namespace soci;
 using namespace std;
@@ -319,12 +319,24 @@ int jsonTest() {
 
 	blib::bun::PRef<dbg::C> c = new dbg::C;
 	c->c = 666;
+	// Convert the object to JSON
 	const std::string json_string = p.toJson();
-	std::cout << "Object1:" << json_string << std::endl;
-	// Construct the new object out of json
+	// Construct the new object out of JSON
 	blib::bun::PRef<dbg::P> p1;
 	p1.fromJson(json_string);
-	std::cout << "Object2:" << p1.toJson() << std::endl;
+	const auto msgpack = p1.toMesssagepack();
+	// Construct another object out of messagepack
+	blib::bun::PRef<dbg::P> p2;
+	p2.fromMessagepack(p1.toMesssagepack());
+	// messagepack to string
+	std::string msgpack_string;
+	for (auto c : msgpack) {
+		msgpack_string.push_back(c);
+	}
+	std::cout << "1. Original object Object:" << json_string << std::endl;
+	std::cout << "2. Object from JSON      :" << p1.toJson() << std::endl;
+	std::cout << "3. Object to Messagepack :" << msgpack_string << std::endl;
+	std::cout << "4. Object from Messagepck:" << p2.toJson() << std::endl;
 	return 1;
 }