From 3f85f83e35a18d8e4ac5c2eb4ca799fc1920a449 Mon Sep 17 00:00:00 2001
From: Novatux <nathanael.courant@laposte.net>
Date: Sun, 2 Nov 2014 09:35:43 +0100
Subject: [PATCH] Make items in autocrafters virtual as well

---
 autocrafter.lua | 61 +++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 57 insertions(+), 4 deletions(-)

diff --git a/autocrafter.lua b/autocrafter.lua
index b2e50c1..a6d8ad1 100644
--- a/autocrafter.lua
+++ b/autocrafter.lua
@@ -77,6 +77,17 @@ local function autocraft(inventory, pos)
 	end
 end
 
+local function update_autocrafter(pos)
+	local meta = minetest.get_meta(pos)
+	if meta:get_string("virtual_items") == "" then
+		meta:set_string("virtual_items", "1")
+		local inv = meta:get_inventory()
+		for _, stack in ipairs(inv:get_list("recipe")) do
+			minetest.item_drop(stack, "", pos)
+		end
+	end
+end
+
 minetest.register_node("pipeworks:autocrafter", {
 	description = "Autocrafter", 
 	drawtype = "normal", 
@@ -103,15 +114,18 @@ minetest.register_node("pipeworks:autocrafter", {
 				"list[current_name;dst;4,0;4,3;]"..
 				"list[current_player;main;0,7;8,4;]")
 		meta:set_string("infotext", "Autocrafter")
+		meta:set_string("virtual_items", "1")
 		local inv = meta:get_inventory()
 		inv:set_size("src", 3*8)
 		inv:set_size("recipe", 3*3)
 		inv:set_size("dst", 4*3)
-	end, 
+	end,
+	on_punch = update_autocrafter,
 	can_dig = function(pos, player)
-		local meta = minetest.get_meta(pos); 
+		update_autocrafter(pos)
+		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
-		return (inv:is_empty("src") and inv:is_empty("recipe") and inv:is_empty("dst"))
+		return (inv:is_empty("src") and inv:is_empty("dst"))
 	end, 
 	after_place_node = function(pos)
 		pipeworks.scan_for_tube_objects(pos)
@@ -119,7 +133,46 @@ minetest.register_node("pipeworks:autocrafter", {
 	after_dig_node = function(pos)
 		pipeworks.scan_for_tube_objects(pos)
 		autocrafterCache[minetest.hash_node_position(pos)] = nil
-	end
+	end,
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		update_autocrafter(pos)
+		local inv = minetest.get_meta(pos):get_inventory()
+		if listname == "recipe" then
+			local stack_copy = ItemStack(stack)
+			stack_copy:set_count(1)
+			inv:set_stack(listname, index, stack_copy)
+			return 0
+		else
+			return stack:get_count()
+		end
+	end,
+	allow_metadata_inventory_take = function(pos, listname, index, stack, player)
+		update_autocrafter(pos)
+		local inv = minetest.get_meta(pos):get_inventory()
+		if listname == "recipe" then
+			inv:set_stack(listname, index, ItemStack(""))
+			return 0
+		else
+			return stack:get_count()
+		end
+	end,
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		update_autocrafter(pos)
+		local inv = minetest.get_meta(pos):get_inventory()
+		local stack = inv:get_stack(from_list, from_index)
+		stack:set_count(count)
+		if from_list == "recipe" then
+			inv:set_stack(from_list, from_index, ItemStack(""))
+			return 0
+		elseif to_list == "recipe" then
+			local stack_copy = ItemStack(stack)
+			stack_copy:set_count(1)
+			inv:set_stack(to_list, to_index, stack_copy)
+			return 0
+		else
+			return stack:get_count()
+		end
+	end,
 })
 
 minetest.register_abm({nodenames = {"pipeworks:autocrafter"}, interval = 1, chance = 1,