add file interface

include/sp/io/FileIO.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <fstream>
+#include <sp/io/IOInterface.h>
+
+namespace sp {
+
+struct FileTag {};
+
+template <>
+class IOInterface<FileTag> {
+  private:
+	std::ofstream m_FileOutput;
+	std::ifstream m_FileInput;
+
+  public:
+	IOInterface(const std::string& filePath) : m_FileOutput(filePath), m_FileInput(filePath) {}
+	IOInterface(IOInterface&& other) : m_FileOutput(std::move(other.m_FileOutput)), m_FileInput(std::move(other.m_FileInput)) {}
+
+	DataBuffer Read(std::size_t a_Amount) {
+		DataBuffer buffer;
+		buffer.Resize(a_Amount);
+		m_FileInput.read(reinterpret_cast<char*>(buffer.data()), a_Amount);
+		return buffer;
+	}
+
+	void Write(const sp::DataBuffer& a_Data) {
+		m_FileOutput.write(reinterpret_cast<const char*>(a_Data.data()), a_Data.GetSize());
+		m_FileOutput.flush();
+	}
+};
+
+using FileIO = IOInterface<FileTag>;
+
+}  // namespace sp

include/sp/io/IOInterface.h

@@ -74,6 +74,9 @@ void IOStream<IOTag, MessageDispatcher, MessageFactory>::RecieveMessages() {
 				throw std::runtime_error("VarInt is too big");
 		}
 
+		// nothing to read
+		if (lenghtValue == 0)
+			return;
 
 		DataBuffer buffer;
 		buffer = m_Interface.Read(lenghtValue);

test/test_file.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+
+#include <examples/PacketExample.h>
+#include <sp/io/FileIO.h>
+
+class CustomPacketHandler : public sp::PacketHandler {
+	void Handle(const KeepAlivePacket& packet) {
+		std::cout << "KeepAlive handled ! " << packet.GetKeepAliveId() << "\n";
+	}
+
+	void Handle(const DisconnectPacket& packet) {
+		std::cout << "Disconnect handled ! " << packet.GetReason() << "\n";
+	}
+
+	void Handle(const UpgradeTowerPacket& packet) {
+		std::cout << "UpgradeTower handled !\n";
+	}
+};
+
+using FileStream = sp::IOStream<sp::FileTag, sp::PacketDispatcher, sp::PacketFactory>;
+
+
+int main() {
+	auto handler = std::make_shared<CustomPacketHandler>();
+
+	FileStream stream(sp::FileIO{"test.txt"});
+	stream.GetDispatcher().RegisterHandler(PacketId::Disconnect, handler);
+	stream.GetDispatcher().RegisterHandler(PacketId::KeepAlive, handler);
+
+	stream.SendMessage(KeepAlivePacket{96});
+	stream.SendMessage(KeepAlivePacket{69});
+	stream.SendMessage(DisconnectPacket{"This is in the file !"});
+
+	stream.RecieveMessages();
+
+	return 0;
+}