Disable buyicon/buymenu according to info_map_parameters (#205)

regamedll/dlls/gamerules.h

@@ -667,6 +667,7 @@ public:
 
 	// has a style of gameplay when aren't any teams
 	bool IsFreeForAll() const;
+	bool CanPlayerBuy(CBasePlayer *pPlayer) const;
 
 	VFUNC bool HasRoundTimeExpired();
 	VFUNC bool IsBombPlanted();

regamedll/dlls/multiplay_gamerules.cpp

@@ -4928,3 +4928,21 @@ void CHalfLifeMultiplay::ChangePlayerTeam(CBasePlayer *pPlayer, const char *pTea
 		CSGameRules()->CheckWinConditions();
 	}
 }
+
+bool CHalfLifeMultiplay::CanPlayerBuy(CBasePlayer *pPlayer) const
+{
+	if (pPlayer->m_iTeam == CT && m_bCTCantBuy)
+	{
+		return false;
+	}
+	else if (pPlayer->m_iTeam == TERRORIST && m_bTCantBuy)
+	{
+		return false;
+	}
+	else if (m_bCTCantBuy && m_bTCantBuy)
+	{
+		return false;
+	}
+
+	return true;
+}

regamedll/dlls/player.cpp

@@ -6154,11 +6154,21 @@ void OLD_CheckBuyZone(CBasePlayer *player)
 {
 	const char *pszSpawnClass = nullptr;
 
-	if (player->m_iTeam == TERRORIST)
+#ifdef REGAMEDLL_FIXES
-		pszSpawnClass = "info_player_deathmatch";
+	if (!CSGameRules()->CanPlayerBuy(player))
+	{
+		return;
+	}
+#endif
 
+	if (player->m_iTeam == TERRORIST)
+	{
+		pszSpawnClass = "info_player_deathmatch";
+	}
 	else if (player->m_iTeam == CT)
+	{
 		pszSpawnClass = "info_player_start";
+	}
 
 	if (pszSpawnClass)
 	{

regamedll/dlls/triggers.cpp

@@ -1812,6 +1812,11 @@ void CBuyZone::BuyTouch(CBaseEntity *pOther)
 
 	if (pev->team == UNASSIGNED || pev->team == p->m_iTeam)
 	{
+#ifdef REGAMEDLL_FIXES
+		if (!CSGameRules()->CanPlayerBuy(p))
+			return;
+#endif
+
 		p->m_signals.Signal(SIGNAL_BUY);
 	}
 }