Add cleaner mod (#137)

games/default/files/cleaner/README.txt

@@ -0,0 +1,16 @@
+MultiCraft Game mod: Cleaner
+=========================
+
+Introduction:
+This mod removes unknown items from inventory and map.
+
+License of source code:
+-----------------------
+Copyright (C) 2019 Jean-Patrick Guerrero (kilbith) <jeanpatrick.guerrero@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3.0 of the License, or
+(at your option) any later version.
+
+http://www.gnu.org/licenses/lgpl-3.0.html

games/default/files/cleaner/init.lua

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+local radius = 16
+local freq = 1
+
+minetest.register_on_joinplayer(function(player)
+	local inv = player:get_inventory()
+
+	for i = 1, inv:get_size("main") do
+		local stack = inv:get_stack("main", i)
+		local itemname = stack:get_name()
+
+		if not minetest.registered_items[itemname] then
+			stack:clear()
+		end
+	end
+end)
+
+local function clean()
+	local players = minetest.get_connected_players()
+	for i = 1, #players do
+		local player = players[i]
+		local pos = player:get_pos()
+
+		for x = -radius, radius do
+		for z = -radius, radius do
+		for y = -radius, radius do
+			local pos_scan = vector.new(pos.x + x, pos.y + y, pos.z + z)
+			local nodename = minetest.get_node(pos_scan).name
+
+			if not minetest.registered_nodes[nodename] then
+				minetest.remove_node(pos_scan)
+			end
+
+			local objs = minetest.get_objects_inside_radius(pos_scan, 0.5)
+			if #objs > 0 then
+				for j = 1, #objs do
+					local obj = objs[j]
+					if not obj:is_player() then
+						local entname = obj:get_entity_name()
+						if not minetest.registered_entities[entname] then
+							obj:remove()
+						end
+					end
+				end
+			end
+		end
+		end
+		end
+	end
+
+	minetest.after(freq, clean)
+end
+
+minetest.after(freq, clean)