Add discord rpc

.gitmodules

@@ -29,3 +29,6 @@
 	path = deps/zlib
 	url = https://github.com/madler/zlib.git
 	branch = develop
+[submodule "deps/discord-rpc"]
+	path = deps/discord-rpc
+	url = https://github.com/discord/discord-rpc.git

deps/discord-rpc

@@ -0,0 +1 @@
+Subproject commit 963aa9f3e5ce81a4682c6ca3d136cddda614db33

deps/premake/discord-rpc.lua

@@ -0,0 +1,38 @@
+discordrpc = {
+	source = path.join(dependencies.basePath, "discord-rpc"),
+}
+
+function discordrpc.import()
+	links { "discord-rpc" }
+	discordrpc.includes()
+end
+
+function discordrpc.includes()
+	includedirs {
+		path.join(discordrpc.source, "include"),
+	}
+end
+
+function discordrpc.project()
+	project "discord-rpc"
+		language "C++"
+
+		discordrpc.includes()
+		rapidjson.import();
+
+		files {
+			path.join(discordrpc.source, "src/*.h"),
+			path.join(discordrpc.source, "src/*.cpp"),
+		}
+		
+		removefiles {
+			path.join(discordrpc.source, "src/*_linux.cpp"),
+			path.join(discordrpc.source, "src/*_unix.cpp"),
+			path.join(discordrpc.source, "src/*_osx.cpp"),
+		}
+
+		warnings "Off"
+		kind "StaticLib"
+end
+
+table.insert(dependencies, discordrpc)

src/client/module/discord.cpp

@@ -0,0 +1,52 @@
+#include <std_include.hpp>
+#include <discord_rpc.h>
+#include "loader/module_loader.hpp"
+#include "scheduler.hpp"
+#include "game/game.hpp"
+
+class discord final : public module
+{
+public:
+	void post_load() override
+	{
+		if (game::environment::is_dedi()) return;
+
+		DiscordEventHandlers handlers;
+		ZeroMemory(&handlers, sizeof(handlers));
+		handlers.ready = ready;
+		handlers.errored = errored;
+		handlers.disconnected = errored;
+		handlers.joinGame = nullptr;
+		handlers.spectateGame = nullptr;
+		handlers.joinRequest = nullptr;
+
+		Discord_Initialize("762374436183343114", &handlers, 1, nullptr);
+
+		scheduler::loop(Discord_RunCallbacks, scheduler::pipeline::main);
+	}
+
+	void pre_destroy() override
+	{
+		Discord_Shutdown();
+	}
+
+private:
+	static void ready(const DiscordUser* request)
+	{
+		DiscordRichPresence discord_presence;
+		ZeroMemory(&discord_presence, sizeof(discord_presence));
+
+		discord_presence.state = game::environment::is_mp() ? "Multiplayer" : "Singleplayer";
+		discord_presence.instance = 1;
+		Discord_UpdatePresence(&discord_presence);
+	}
+
+	static void errored(const int error_code, const char* message)
+	{
+		printf("Discord: (%i) %s", error_code, message);
+	}
+};
+
+#ifndef DEV_BUILD
+REGISTER_MODULE(discord)
+#endif