Add sv_gametype and sample mod

CMakeLists.txt

@@ -2540,6 +2540,8 @@ if(SERVER)
     gamecontroller.h
     gamemodes/DDRace.cpp
     gamemodes/DDRace.h
+    gamemodes/mod.cpp
+    gamemodes/mod.h
     gameworld.cpp
     gameworld.h
     player.cpp

src/game/server/gamecontext.cpp

@@ -30,6 +30,7 @@
 
 #include "entities/character.h"
 #include "gamemodes/DDRace.h"
+#include "gamemodes/mod.h"
 #include "player.h"
 #include "score.h"
 
@@ -3592,6 +3593,9 @@ void CGameContext::OnInit(const void *pPersistentData)
 		}
 	}
 
+	if(!str_comp(Config()->m_SvGametype, "mod"))
+		m_pController = new CGameControllerMod(this);
+	else
 		m_pController = new CGameControllerDDRace(this);
 
 	const char *pCensorFilename = "censorlist.txt";

src/game/server/gamemodes/mod.cpp

@@ -0,0 +1,24 @@
+#include "mod.h"
+
+// Exchange this to a string that identifies your game mode.
+// DM, TDM and CTF are reserved for teeworlds original modes.
+// DDraceNetwork and TestDDraceNetwork are used by DDNet.
+#define GAME_TYPE_NAME "Mod"
+#define TEST_TYPE_NAME "TestMod"
+
+CGameControllerMod::CGameControllerMod(class CGameContext *pGameServer) :
+	IGameController(pGameServer)
+{
+	m_pGameType = g_Config.m_SvTestingCommands ? TEST_TYPE_NAME : GAME_TYPE_NAME;
+
+	//m_GameFlags = GAMEFLAG_TEAMS; // GAMEFLAG_TEAMS makes it a two-team gamemode
+}
+
+CGameControllerMod::~CGameControllerMod() = default;
+
+void CGameControllerMod::Tick()
+{
+	// this is the main part of the gamemode, this function is run every tick
+
+	IGameController::Tick();
+}

src/game/server/gamemodes/mod.h

@@ -0,0 +1,14 @@
+#ifndef GAME_SERVER_GAMEMODES_MOD_H
+#define GAME_SERVER_GAMEMODES_MOD_H
+
+#include <game/server/gamecontroller.h>
+
+class CGameControllerMod : public IGameController
+{
+public:
+	CGameControllerMod(class CGameContext *pGameServer);
+	~CGameControllerMod();
+
+	void Tick() override;
+};
+#endif // GAME_SERVER_GAMEMODES_MOD_H

src/game/variables.h

@@ -178,6 +178,7 @@ MACRO_CONFIG_INT(ClSkipStartMenu, cl_skip_start_menu, 0, 0, 1, CFGFLAG_CLIENT |
 // server
 MACRO_CONFIG_INT(SvWarmup, sv_warmup, 0, 0, 0, CFGFLAG_SERVER, "Number of seconds to do warmup before round starts")
 MACRO_CONFIG_STR(SvMotd, sv_motd, 900, "", CFGFLAG_SERVER, "Message of the day to display for the clients")
+MACRO_CONFIG_STR(SvGametype, sv_gametype, 32, "ddnet", CFGFLAG_SAVE | CFGFLAG_SERVER, "Game type (ddnet, mod)")
 MACRO_CONFIG_INT(SvTournamentMode, sv_tournament_mode, 0, 0, 1, CFGFLAG_SERVER, "Tournament mode. When enabled, players joins the server as spectator")
 MACRO_CONFIG_INT(SvSpamprotection, sv_spamprotection, 1, 0, 1, CFGFLAG_SERVER, "Spam protection")