make multimeter show inventory lists

mods/sparkdebug/lua/multimeter.lua

@@ -103,6 +103,12 @@ minetest.register_globalstep(function(dtime)
 						end
 					elseif outputType == "Inventory" then
 						hudString = hudString .. outputname .. ": Inventory (viewing not implemented)"
+					elseif outputType == "InventoryList" then
+						local count = 1
+						for listItemName, listItem in pairs(output) do
+							hudString = hudString .. outputname .. "[" .. count .. "]:" .. listItem:get_name() .. "[" .. listItem:get_count() .. "] (item)\n"
+							count = count +1
+						end
 					else
 						hudString = hudString .. outputType .. "?\n".. dump2(output)
 					end

mods/sparkmachine/lua/metalfurnace.lua

@@ -21,8 +21,8 @@ local function is_smeltable(items)
 end
 
 local function is_item_allowed(pos, target, _, stack)
-	if target ~= "source" then return 0 end 
-
+	if target ~= "source" or not sparktech.getoption(pos, "acceptInput") then return 0 end 
+	
 	if not is_smeltable({stack}) then
 		return 0
 	else
@@ -39,6 +39,7 @@ end
 
 local function ongetitem(pos)
 	local meta = minetest.get_meta(pos)
+	if not sparktech.getoption(pos, "enabled") then return end
 	if meta:get_int("energy") < modifier then return end
 	local timer = minetest.get_node_timer(pos)
 	timer:start(1.0)
@@ -46,6 +47,8 @@ end
 
 local function mytime(pos, elapsed)
 	local meta = minetest.get_meta(pos)
+	
+	if not sparktech.getoption(pos, "enabled") then return end -- TODO: show in the gui somehow
 	local energy = meta:get_int("energy")
 	local inventory = meta:get_inventory()
 	local source = inventory:get_list("source")
@@ -125,7 +128,41 @@ minetest.register_node( NAME .. ":furnace", {
 
 	allow_metadata_inventory_put = is_item_allowed,
 	allow_metadata_inventory_move = is_item_allowed_move,
-	on_metadata_inventory_put = ongetitem
+	allow_metadata_inventory_take = function(pos, listname, index, stack, player) 
+		if listname ~= "product" then return stack:get_count() end
+		if not sparktech.getoption(pos, "acceptRemoval") then return 0 end
+		return stack:get_count()
+	end,	
+	on_metadata_inventory_put = ongetitem,
+	_sparkoptionchanged = function(pos, name)
+		if name == "enabled" then
+			local timer = minetest.get_node_timer(pos)
+			if sparktech.getoption(pos, name) then
+				timer:start(1.0)
+			else
+				timer:stop()
+			end
+		end
+	end,
+	_sparkoption = {
+		enabled = true,
+		acceptInput = true,
+		acceptRemoval = true
+	},
+	_sparkoutput = {
+		inputItems = function(nodepos)
+			local inventory = minetest.get_meta(nodepos):get_inventory()
+			return inventory:get_list("source")
+		end,
+		outputItems = function(nodepos)
+			local inventory = minetest.get_meta(nodepos):get_inventory()
+			return inventory:get_list("product")
+		end
+	},
+	_sparkoutputtype = {
+		inputItems = "InventoryList",
+		outputItems = "InventoryList"
+	}
 })
 
 minetest.register_craft({