Add digilines support to autocrafter

"on" and "off" messages turn it on or off, "single" crafts one item, and sending nested tables in the shape of the crafting grid sets the craft. Example message:
{
{"default:wood","default:wood","default:wood"},
{"default:wood","","default:wood"},
{"default:wood","default:wood","default:wood"}
}

autocrafter.lua

@@ -102,6 +102,7 @@ local function after_recipe_change(pos, inventory)
 		minetest.get_node_timer(pos):stop()
 		autocrafterCache[minetest.hash_node_position(pos)] = nil
 		meta:set_string("infotext", "unconfigured Autocrafter")
+		inventory:set_stack("output", 1, "")
 		return
 	end
 	local recipe_changed = false
@@ -171,26 +172,29 @@ end
 local function update_meta(meta, enabled)
 	local state = enabled and "on" or "off"
 	meta:set_int("enabled", enabled and 1 or 0)
-	meta:set_string("formspec",
+	local fs = 	"size[8,12]"..
-			"size[8,11]"..
 			"list[context;recipe;0,0;3,3;]"..
 			"image[3,1;1,1;gui_hb_bg.png^[colorize:#141318:255]"..
 			"list[context;output;3,1;1,1;]"..
 			"image_button[3,2;1,1;pipeworks_button_" .. state .. ".png;" .. state .. ";;;false;pipeworks_button_interm.png]" ..
-			"list[context;src;0,3.5;8,3;]"..
+			"list[context;src;0,4.5;8,3;]"..
 			"list[context;dst;4,0;4,3;]"..
 			default.gui_bg..
 			default.gui_bg_img..
 			default.gui_slots..
-			default.get_hotbar_bg(0,7) ..
+			default.get_hotbar_bg(0,8) ..
-			"list[current_player;main;0,7;8,4;]" ..
+			"list[current_player;main;0,8;8,4;]" ..
 			"listring[current_player;main]"..
 			"listring[context;src]" ..
 			"listring[context;dst]" ..
 			"listring[current_player;main]"..
 			"listring[context;recipe]" ..
 			"listring[context;output]"
-			)
+	if minetest.get_modpath("digilines") then
+		fs = fs.."field[1,3.5;4,1;channel;Channel;${channel}]"
+		fs = fs.."button_exit[5,3.2;2,1;save;Save]"
+	end
+	meta:set_string("formspec",fs)
 
 	-- toggling the button doesn't quite call for running a recipe change check
 	-- so instead we run a minimal version for infotext setting only
@@ -282,6 +286,8 @@ minetest.register_node("pipeworks:autocrafter", {
 			if update_meta(meta, true) then
 				start_crafter(pos)
 			end
+		elseif fields.save then
+			meta:set_string("channel",fields.channel)
 		end
 	end,
 	can_dig = function(pos, player)
@@ -362,7 +368,40 @@ minetest.register_node("pipeworks:autocrafter", {
 		after_inventory_change(pos)
 		return count
 	end,
-	on_timer = run_autocrafter
+	on_timer = run_autocrafter,
+	digiline = {
+		receptor = {},
+		effector = {
+			action = function(pos,node,channel,msg)
+				local meta = minetest.get_meta(pos)
+				if channel ~= meta:get_string("channel") then return end
+				if type(msg) == "table" then
+					if #msg < 3 then return end
+					local inv = meta:get_inventory()
+					for y=0,2,1 do
+						for x=1,3,1 do
+							local slot = y*3+x
+							if minetest.registered_items[msg[y+1][x]] then
+								inv:set_stack("recipe",slot,ItemStack(msg[y+1][x]))
+							else
+								inv:set_stack("recipe",slot,ItemStack(""))
+							end
+						end
+					end
+					after_recipe_change(pos,inv)
+				elseif msg == "off" then
+					update_meta(meta, false)
+					minetest.get_node_timer(pos):stop()
+				elseif msg == "on" then
+					if update_meta(meta, true) then
+						start_crafter(pos)
+					end
+				elseif msg == "single" then
+					run_autocrafter(pos,1)
+				end
+			end,
+		},
+	},
 })
 
 minetest.register_craft( {