add: implement authentication system ui and handshake.

Minecraft.Client/AuthScreen.cpp

@@ -0,0 +1,101 @@
+#include "stdafx.h"
+#include "AuthScreen.h"
+#include "Minecraft.h"
+#include "User.h"
+#include <fstream>
+
+static constexpr auto PROFILES_FILE = L"auth_profiles.dat";
+
+vector<AuthProfile> AuthProfileManager::profiles;
+int AuthProfileManager::selectedProfile = -1;
+
+void AuthProfileManager::load()
+{
+	profiles.clear();
+	std::ifstream file(PROFILES_FILE, std::ios::binary);
+	if (!file) return;
+
+	uint32_t count = 0;
+	file.read(reinterpret_cast<char *>(&count), sizeof(count));
+
+	for (uint32_t i = 0; i < count && file.good(); i++)
+	{
+		AuthProfile p;
+		uint8_t type;
+		file.read(reinterpret_cast<char *>(&type), sizeof(type));
+		p.type = static_cast<AuthProfile::Type>(type);
+
+		auto readWstr = [&file]() -> wstring {
+			uint16_t len = 0;
+			file.read(reinterpret_cast<char *>(&len), sizeof(len));
+			wstring s(len, L'\0');
+			file.read(reinterpret_cast<char *>(s.data()), len * sizeof(wchar_t));
+			return s;
+		};
+
+		p.uid = readWstr();
+		p.username = readWstr();
+		p.token = readWstr();
+		profiles.push_back(std::move(p));
+	}
+
+	if (!profiles.empty())
+		selectedProfile = 0;
+}
+
+void AuthProfileManager::save()
+{
+	std::ofstream file(PROFILES_FILE, std::ios::binary | std::ios::trunc);
+	if (!file) return;
+
+	uint32_t count = static_cast<uint32_t>(profiles.size());
+	file.write(reinterpret_cast<const char *>(&count), sizeof(count));
+
+	auto writeWstr = [&file](const wstring &s) {
+		uint16_t len = static_cast<uint16_t>(s.length());
+		file.write(reinterpret_cast<const char *>(&len), sizeof(len));
+		file.write(reinterpret_cast<const char *>(s.data()), len * sizeof(wchar_t));
+	};
+
+	for (const auto &p : profiles)
+	{
+		uint8_t type = static_cast<uint8_t>(p.type);
+		file.write(reinterpret_cast<const char *>(&type), sizeof(type));
+		writeWstr(p.uid);
+		writeWstr(p.username);
+		writeWstr(p.token);
+	}
+}
+
+void AuthProfileManager::addProfile(AuthProfile::Type type, const wstring &username)
+{
+	profiles.push_back({type, L"offline_" + username, username, {}});
+	selectedProfile = static_cast<int>(profiles.size()) - 1;
+	save();
+}
+
+void AuthProfileManager::removeSelectedProfile()
+{
+	if (selectedProfile < 0 || selectedProfile >= static_cast<int>(profiles.size()))
+		return;
+
+	profiles.erase(profiles.begin() + selectedProfile);
+	if (selectedProfile >= static_cast<int>(profiles.size()))
+		selectedProfile = static_cast<int>(profiles.size()) - 1;
+	save();
+}
+
+bool AuthProfileManager::applySelectedProfile()
+{
+	if (selectedProfile < 0 || selectedProfile >= static_cast<int>(profiles.size()))
+		return false;
+
+	const auto &p = profiles[selectedProfile];
+	auto *mc = Minecraft::GetInstance();
+
+	if (mc->user)
+		delete mc->user;
+
+	mc->user = new User(p.username, p.token);
+	return true;
+}