Warning text to inform on map being played in an unsupported mode (#1241

)

* Adding warning to inform map is being played in unsupported mode

* Move code to match.lua

mods/ctf/ctf_modebase/match.lua

@@ -40,6 +40,17 @@ function ctf_modebase.start_match_after_vote()
 		ctf_teams.allocate_teams(ctf_map.current_map.teams)
 
 		ctf_modebase.current_mode_matches_played = ctf_modebase.current_mode_matches_played + 1
+
+		local current_map = ctf_map.current_map
+		local current_mode = ctf_modebase.current_mode
+
+		if table.indexof(current_map.game_modes, current_mode) == -1 then
+			local concat = "The current mode is not in the list of modes supported by the current map."
+			local cmd_text = string.format("/ctf_next -f [mode:technical modename] %s", current_map.dirname)
+			minetest.chat_send_all(minetest.colorize(
+				"red", string.format("%s\nSupported mode(s): %s. To switch to a mode set for the map, do %s",
+				concat, table.concat(current_map.game_modes, ", "), cmd_text)))
+		end
 	end)
 end