refactor!: Replace premake5 with CMake. (#551)

Co-authored-by: tupoy-ya <tupoy-ya@users.noreply.github.com>

src/services/friends/friends_service.cpp

@@ -0,0 +1,28 @@
+#include "friends_service.hpp"
+#include "pointers.hpp"
+
+namespace big
+{
+	friends_service::friends_service()
+	{
+		g_friends_service = this;
+	}
+
+	friends_service::~friends_service()
+	{
+		g_friends_service = nullptr;
+	}
+
+	bool friends_service::is_friend(CNetGamePlayer* net_player)
+	{
+		if (net_player == nullptr)
+			return false;
+
+		const auto rockstar_id = net_player->get_net_data()->m_gamer_handle_2.m_rockstar_id;
+		for (std::uint32_t i = 0; i < g_pointers->m_friend_registry->m_friend_count; i++)
+			if (rockstar_id == g_pointers->m_friend_registry->get(i)->m_rockstar_id)
+				return true;
+		return false;
+	}
+
+}

src/services/friends/friends_service.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace big
+{
+	class friends_service final
+	{
+	public:
+		friends_service();
+		~friends_service();
+		
+		friends_service(const friends_service&) = delete;
+		friends_service(friends_service&&) noexcept = delete;
+		friends_service& operator=(const friends_service&) = delete;
+		friends_service& operator=(friends_service&&) noexcept = delete;
+
+		[[nodiscard]] static bool is_friend(CNetGamePlayer* net_player);
+	};
+
+	inline friends_service* g_friends_service{};
+}