Add generic IO (#3)

Reviewed-on: #3
Co-authored-by: Persson-dev <sim16.prib@gmail.com>
Co-committed-by: Persson-dev <sim16.prib@gmail.com>

include/sp/protocol/message/ArrayFillerImpl.h

@@ -1,12 +1,12 @@
 #pragma once
 
+namespace sp {
 namespace details {
 
 template <typename TBase>
 using ArrayType = std::vector<std::function<std::unique_ptr<TBase>(void)>>;
 
 
-
 template <typename TBase, typename... TMessages>
 struct ArrayFiller {};
 
@@ -35,4 +35,5 @@ struct ArrayFiller<TBase, TMessage> {
 	}
 };
 
-}  // namespace details
+}  // namespace details
+}  // namespace sp

include/sp/protocol/message/MessageInterfacesImpl.h

@@ -75,6 +75,13 @@ class MessageInterfaceWriteBase : public TBase {
 		WriteImpl(buffer);
 	}
 
+	// helper
+	DataBuffer Write() const {
+		DataBuffer buffer;
+		this->Write(buffer);
+		return buffer;
+	}
+
   protected:
 	virtual void WriteImpl(DataBuffer& buffer) const = 0;
 };
@@ -113,6 +120,13 @@ class MessageInterfaceWriteIdBase : public TBase {
 		this->WriteData(this->GetId(), buffer);
 		this->WriteImpl(buffer);
 	}
+
+	// helper
+	DataBuffer Write() const {
+		DataBuffer buffer;
+		this->Write(buffer);
+		return buffer;
+	}
 };
 
 }  // namespace details