From c2f74cd42a5d1977767578250248630fb95de391 Mon Sep 17 00:00:00 2001
From: 163140 <163140@autistici.org>
Date: Mon, 8 Dec 2014 01:31:06 +0000
Subject: [PATCH] Added signal "empty"

"Empty" signal useful for automated factories
---
 digilines_inventory/init.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/digilines_inventory/init.lua b/digilines_inventory/init.lua
index e44359a..72275ea 100644
--- a/digilines_inventory/init.lua
+++ b/digilines_inventory/init.lua
@@ -127,6 +127,10 @@ minetest.register_node("digilines_inventory:chest", {
 		minetest.log("action", player:get_player_name().." puts stuff into chest at "..minetest.pos_to_string(pos))
 	end,
 	on_metadata_inventory_take = function(pos, listname, index, stack, player)
+		local inv = minetest.get_meta(pos):get_inventory()
+		if inv:is_empty(listname) then
+			sendMessage(pos, "empty", channel)
+		end
 		sendMessage(pos,"utake "..maybeString(stack))
 		minetest.log("action", player:get_player_name().." takes stuff from chest at "..minetest.pos_to_string(pos))
 	end