Add technic.process_recipe() function (#345)

technic/helpers.lua

@@ -272,3 +272,16 @@ function technic.can_insert_unique_stack(pos, node, incoming_stack, direction)
 	end
 	return technic.default_can_insert(pos, node, incoming_stack, direction)
 end
+
+function technic.process_recipe(recipe, inv)
+	local dst_copy = inv:get_list("dst")
+	for _,item in ipairs(recipe.output) do
+		if not inv:room_for_item("dst", ItemStack(item)) then
+			inv:set_list("dst", dst_copy)
+			return false
+		end
+		inv:add_item("dst", item)
+	end
+	inv:set_list("src", recipe.new_input)
+	return true
+end

technic/machines/other/coal_alloy_furnace.lua

@@ -118,22 +118,18 @@ minetest.register_abm({
 		end
 
 		-- Get what to cook if anything
-		local result = technic.get_recipe("alloy", inv:get_list("src"))
+		local recipe = technic.get_recipe("alloy", inv:get_list("src"))
 
 		local was_active = false
 
 		if meta:get_float("fuel_time") < meta:get_float("fuel_totaltime") then
 			was_active = true
 			meta:set_int("fuel_time", meta:get_int("fuel_time") + 1)
-			if result then
+			if recipe then
 				meta:set_int("src_time", meta:get_int("src_time") + 1)
-				if meta:get_int("src_time") >= result.time then
+				if meta:get_int("src_time") >= recipe.time then
 					meta:set_int("src_time", 0)
-					local result_stack = ItemStack(result.output)
-					if inv:room_for_item("dst", result_stack) then
-						inv:set_list("src", result.new_input)
-						inv:add_item("dst", result_stack)
-					end
+					technic.process_recipe(recipe, inv)
 				end
 			else
 				meta:set_int("src_time", 0)
@@ -175,9 +171,7 @@ minetest.register_abm({
 			return
 		end
 
-		local recipe = technic.get_recipe("alloy", inv:get_list("src"))
-
-		if not recipe then
+		if not technic.get_recipe("alloy", inv:get_list("src")) then
 			if was_active then
 				meta:set_string("infotext", S("@1 is empty", machine_name))
 				technic.swap_node(pos, "technic:coal_alloy_furnace")

technic/machines/register/machine_base.lua

@@ -132,8 +132,8 @@ function technic.register_base_machine(nodename, data)
 			meta:set_int("src_time", meta:get_int("src_time") + round(def.speed*10))
 		end
 		while true do
-			local result = inv:get_list("src") and technic.get_recipe(typename, inv:get_list("src"))
-			if not result then
+			local recipe = inv:get_list("src") and technic.get_recipe(typename, inv:get_list("src"))
+			if not recipe then
 				technic.swap_node(pos, nodename)
 				meta:set_string("infotext", infotext_idle)
 				meta:set_int(tier.."_EU_demand", 0)
@@ -144,39 +144,21 @@ function technic.register_base_machine(nodename, data)
 			technic.swap_node(pos, nodename.."_active")
 			meta:set_string("infotext", infotext_active .. "\n" ..
 			S("Demand: @1", technic.EU_string(machine_demand[EU_upgrade+1])))
-			if meta:get_int("src_time") < round(result.time*10) then
+			if meta:get_int("src_time") < round(recipe.time*10) then
 				if not powered then
 					technic.swap_node(pos, nodename)
 					meta:set_string("infotext", infotext_unpowered)
 				end
 				return
 			end
-			local output = result.output
-			if type(output) ~= "table" then output = { output } end
-			local output_stacks = {}
-			for _, o in ipairs(output) do
-				table.insert(output_stacks, ItemStack(o))
-			end
-			local room_for_output = true
-			inv:set_size("dst_tmp", inv:get_size("dst"))
-			inv:set_list("dst_tmp", inv:get_list("dst"))
-			for _, o in ipairs(output_stacks) do
-				if not inv:room_for_item("dst_tmp", o) then
-					room_for_output = false
-					break
-				end
-				inv:add_item("dst_tmp", o)
-			end
-			if not room_for_output then
+			if not technic.process_recipe(recipe, inv) then
 				technic.swap_node(pos, nodename)
 				meta:set_string("infotext", infotext_idle)
 				meta:set_int(tier.."_EU_demand", 0)
-				meta:set_int("src_time", round(result.time*10))
+				meta:set_int("src_time", round(recipe.time*10))
 				return
 			end
-			meta:set_int("src_time", meta:get_int("src_time") - round(result.time*10))
-			inv:set_list("src", result.new_input)
-			inv:set_list("dst", inv:get_list("dst_tmp"))
+			meta:set_int("src_time", meta:get_int("src_time") - round(recipe.time*10))
 		end
 	end