Initial release

control.lua

@@ -0,0 +1,44 @@
+--control.lua
+
+--functions definitions
+local function get_items_by_content(inserter,inventory)
+	local items = {}
+	for item,count in pairs(inventory.get_contents()) do
+		if #items < inserter.filter_slot_count then
+			items[#items+1] = item
+		end
+	end
+	return items
+end
+
+local function get_items_by_filter(inserter,inventory)
+	local items = {}
+	for slot = 1,#inventory,1 do
+		if #items < inserter.filter_slot_count and inventory.get_filter(slot) then
+			items[#items+1] = inventory.get_filter(slot)
+		end
+	end
+	return items
+end
+
+local function on_built_entity(event)
+	local inserter = event.created_entity
+	if inserter.filter_slot_count then
+		local inventory = inserter.surface.find_entities_filtered({position = inserter.pickup_position, limit = 1})[1].get_output_inventory()
+		if inventory then
+			local mode = game.players[event.player_index].mod_settings["Autofilter_Mode"].value
+			if mode == "content" and not inventory.is_empty() then
+				for slot,item in pairs(get_items_by_content(inserter,inventory)) do
+					inserter.set_filter(slot,item)
+				end
+			elseif mode == "filter" and inventory.is_filtered() then
+				for slot,item in pairs(get_items_by_filter(inserter,inventory)) do
+					inserter.set_filter(slot,item)
+				end
+			end
+		end
+	end
+end
+
+--event handling
+script.on_event(defines.events.on_built_entity, on_built_entity,{{filter="type", type = "inserter"}})